Global Methylene Diphenyl Diisocyanate (MDI) Market Professional Survey Report 2017 1 Industry Overview of Methylene Diphenyl Diisocyanate (MDI) 1.1 Definition and Specifications of Methylene Diphenyl Diisocyanate (MDI) 1.1.1 Definition of Methylene Diphenyl Diisocyanate (MDI) 1.1.2 Specifications of Methylene Diphenyl Diisocyanate (MDI) 1.2 Classification of Methylene Diphenyl Diisocyanate (MDI) 1.2.1 Primary Level 1.2.2 Boutique Level 1.3 Applications of Methylene Diphenyl Diisocyanate (MDI) 1.3.1 Polyurethane Coating 1.3.2 Waterproof Material 1.3.3 Building Materials 1.3.4 Vehicle 1.3.5 Thin Film 1.3.6 Other 1.4 Market Segment by Regions 1.4.1 North America 1.4.2 China 1.4.3 Europe 1.4.4 Southeast Asia 1.4.5 Japan 1.4.6 India 2 Manufacturing Cost Structure Analysis of Methylene Diphenyl Diisocyanate (MDI) 2.1 Raw Material and Suppliers 2.2 Manufacturing Cost Structure Analysis of Methylene Diphenyl Diisocyanate (MDI) 2.3 Manufacturing Process Analysis of Methylene Diphenyl Diisocyanate (MDI) ...
Hazards. Methyl isocyanate (MIC) is extremely toxic. The threshold limit value set by the American Conference on Government Industrial Hygienists is 0.02 ppm. MIC is toxic by inhalation, ingestion and contact in quantities as low as 0.4 ppm. Exposure symptoms includes coughing, chest pain, dyspnea, asthma, irritation of the eyes, nose and throat, as well as skin damage. Higher levels of exposure, over 21 ppm, can result in pulmonary or lung edema, emphysema and hemorrhages, bronchial pneumonia and death. Although the odor of methyl isocyanate cannot be detected at 5 ppm by most people, its potent lachrymal properties provide an excellent warning of its presence (at a concentration of 2-4 parts per million (ppm) subjects eyes are irritated, while at 21 ppm, subjects could not tolerate the presence of methyl isocyanate in air).. Proper care must be taken to store methyl isocyanate because of its ease of exothermically polymerizing (see Reactions) and its similar sensitivity to water. Only ...
Isophorone diisocyanate, 98%, ACROS Organics™ 1L; Glass bottle Isophorone diisocyanate, 98%, ACROS Organics™ Isa to Isopropylamin -Organics
Exposure to 4,4-methylene diphenyl diisocyanate (MDI) in the occupational setting may lead to development of occupational asthma (OA), and the underlying molecular mechanisms of MDI-induced disease pathogenesis remain an active area of research. Using a nose-only mouse inhalation model, we find that circulating microRNA (miR)-206-3p and miR-381-3p are downregulated after MDI exposure; however, cellular miR-206-3p and miR-381-3p responses after MDI aerosol exposure and their pathophysiological roles in MDI-OA are unknown. We hypothesize that miR-206-3p and miR-381-3p-regulated mechanisms cause increased expression of the inducible nitric oxide synthase (iNOS) after MDI aerosol exposure. We examined cellular miR-206-3p and miR-381-3p, calcineurins, nuclear factors of activated T cells (NFATs), and iNOS levels from both nose-only exposed murine bronchoalveolar lavage cells (BALCs) and differentiated THP-1 macrophages treated with MDI-glutathione (GSH) conjugates. Both in vivo murine MDI aerosol ...
wherein R is a polyvalent organic radical which is either aliphatic, aralkyl, aromatic or mixtures thereof, and z is an integer which corresponds to the valence of R and is at least two. Representative of the organic polyisocyanates contemplated herein includes, for example, the aromatic diisocyanates such as 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, mixtures of 2,4- and 2,6-toluene diisocyanate, crude toluene diisocyanate, methylene diphenyl diisocyanate, crude methylene diphenyl diisocyanate and the like; the aromatic triisocyanates such as 4,4,4-triphenylmethane triisocyanate, 2,4,6-toluene triisocyanates; the aromatic tetraisocyanates such as 4,4-dimethyldiphenylmethane-2,25,5-tetraisocyanate, and the like; arylalkyl polyisocyanates such as xylylene diisocyanate; aliphatic polyisocyanate such as hexamethylene-1,6-diisocyanate, lysine diisocyanate methylester and the like; and mixtures thereof. Other organic polyisocyanates include polymethylene polyphenylisocyanate, ...
TY - JOUR. T1 - Autoradiographic analyses of Guinea pig airway tissues following inhalation exposure to C-labeled methyl isocyanate. AU - Kennedy, Amy L.. AU - Singh, Gurmukh. AU - Alarie, Yves. AU - Brown, William E.. PY - 1993/1/1. Y1 - 1993/1/1. N2 - Through the use of radioactively labeled methyl isocyanate (MIC), the deposition, penetration, and clearance of this highly reactive compound in the airway at the tissue and cellular levels have been directly examined. Guinea pigs were exposed to 14C-MIC vapors at concentrations ranging from 0.38 to 15.2 ppm for periods of 1-6 hr. Solubilization of tissues from these animals showed the airway tissues to have the highest level of radioactivity. In the nasal region, 14C deposition, as monitored by histoautoradiography, was limited to the epithelial layer, was related to dose, and was dependent on the specific epithelial cell type. The squamous epithelium was minimally labeled on the surface and the label did not penetrate the cell layer. However, ...
13. OCI Company Ltd. Analyses of the global Isocyanates market trends along with the projections of CAGRs (compound annual growth rates) are provided in the research report. To estimate the overall market size of Isocyanates, its application, and regions-in terms of value and volume-the bottom-up approach is followed. On the other hand, to corroborate the overall Isocyanates market size-again in terms of value and volume-the top-down approach is followed. Following the method of data triangulation and data validation via primaries, the precise values of the parent market and individual market in terms of size are calculated and established in the report.. This market research report provides the client with comprehensive market analysis of the Isocyanates market over the forecast period. In addition, it also furnishes a general idea of the challenges, drivers, and restraints that have direct or indirect impact on the industry. It further highlights the market, the industry, and latest technology ...
Methlyene di-phenyl diisocyanate (MDI) is widely used in the production of polyurethane products, such as wood binders and foams. Diisocyanates are very reactive compounds that can undergo nonenzymatic hydrolysis to form methylenedianiline (MDA), or react under physiological conditions with primary amines to form ureas and/or with thiols to form labile thiol acid esters. MDA is a carcinogen in ani
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Occupational Health and Safety Act. R.R.O. 1990, REGULATION 842. DESIGNATED SUBSTANCE - ISOCYANATES. Historical version for the period December 16, 2009 to June 30, 2010.. Note: This Regulation is revoked on July 1, 2010. See: O. Reg. 490/09, ss. 33, 34.. Last amendment: O. Reg. 490/09.. This is the English version of a bilingual regulation.. 1. In this Regulation,. isocyanates means organic isocyanates; (isocyanates). joint health and safety committee includes a joint health and safety committee established under section 9 of the Act, a committee of like nature and the workers or their representatives who participate in an arrangement, program or system conforming to subsection 9 (4) of the Act. (comité mixte sur la santé et la sécurité) R.R.O. 1990, Reg.842, s. 1.. 2. Isocyanates are prescribed as designated substances. R.R.O. 1990, Reg. 842, s. 2.. 3. (1) Subject to subsection (3), this Regulation applies to every employer and worker at a workplace where isocyanates are produced, ...
This research was presented in two papers: First Detection of Methyl Isocyanate (CH3NCO) in a solar-type Protostar by R. Martín-Doménech et al. and The ALMA-PILS survey: Detection of CH3NCO toward the low-mass protostar IRAS 16293-2422 and laboratory constraints on its formation, by N. F. W. Ligterink et al.. Both papers will appear in the same issue of the Monthly Notices of the Royal Astronomical Society.. One team is composed of: R. Martín-Doménech (Centro de Astrobiología, Spain), V. M. Rivilla (INAF-Osservatorio Astrofisico di Arcetri, Italy), I. Jiménez-Serra (Queen Mary University of London, UK), D. Quénard (Queen Mary University of London, UK), L. Testi (INAF-Osservatorio Astrofisico di Arcetri, Italy; ESO, Garching, Germany; Excellence Cluster Universe, Germany) and J. Martín-Pintado (Centro de Astrobiología, Spain).. The other team is composed of: N. F. W. Ligterink (Sackler Laboratory for Astrophysics, Leiden Observatory, the Netherlands), A. Coutens (University College ...
Developing a Renewable Hybrid Resin System. Part I: Characterization of Co-Polymers of Isocyanate with Different Molecular Weights of Phenolic Resins. Xiaomei Liu,a Yiqiang Wu,b Rubin Shmulsky,a Yan Luo,a Xiaodong (Alice) Wang,c I wei Chu,d and Hui Wan a,*. Co-polymer systems of methylene diphenyl diisocyanate (MDI) and phenol-formaldehyde (PF) resins with different molecular weights were characterized by infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The FTIR and TGA coupled with differential thermogravimetric (DTG) results showed that higher molecular weight of PF resins not only promoted the reaction of isocyanate and PF co-polymer system, but also resulted in a better thermal property of prepared co-polymers. The XRD results revealed that higher molecular weight led to a higher proportion of ordered or crosslinking structures in the hybrid resin system. The relationship between the thermal resistance, mechanical properties and the molecular ...
Global isophorone market is segmented on the basis of type, application and geography. Isophorone is a clear colorless liquid, with a camphor-like odor. Less dense than water and insoluble in water, boiling point 420°F, flash point near 200°F. Contact irritates skin and eyes; toxic by ingestion. It is used as a solvent and in pesticides.By properties, isophorone diamine is a colorless yellow liquid of low viscosity. It is thicker than water and highly soluble. It is also miscible in alcohols, esters, ketones and ethers. It is an amine and is thus a base with an amine odor. It has two amino groups such as aromatic diamines and aliphatic diamines which are used to produce polyesters, nylons etc. where they are used as monomers.. Full Research Report On Global Isophorone Market Analysis available at: https://www.millioninsights.com/industry-reports/isophorone-market. It is used as a hardner in heat cured epoxies. These hardeners are humidity resistant and have a less chance to form carbamates. ...
Global isophorone market is segmented on the basis of type, application and geography. Isophorone is a clear colorless liquid, with a camphor-like odor. Less dense than water and insoluble in water, boiling point 420°F, flash point near 200°F. Contact irritates skin and eyes; toxic by ingestion. It is used as a solvent and in pesticides.By properties, isophorone diamine is a colorless yellow liquid of low viscosity. It is thicker than water and highly soluble. It is also miscible in alcohols, esters, ketones and ethers. It is an amine and is thus a base with an amine odor. It has two amino groups such as aromatic diamines and aliphatic diamines which are used to produce polyesters, nylons etc. where they are used as monomers.. Full Research Report On Global Isophorone Market Analysis available at: https://www.millioninsights.com/industry-reports/isophorone-market. It is used as a hardner in heat cured epoxies. These hardeners are humidity resistant and have a less chance to form carbamates. ...
Global isophorone market is segmented on the basis of type, application and geography. Isophorone is a clear colorless liquid, with a camphor-like odor. Less dense than water and insoluble in water, boiling point 420°F, flash point near 200°F. Contact irritates skin and eyes; toxic by ingestion. It is used as a solvent and in pesticides.By properties, isophorone diamine is a colorless yellow liquid of low viscosity. It is thicker than water and highly soluble. It is also miscible in alcohols, esters, ketones and ethers. It is an amine and is thus a base with an amine odor. It has two amino groups such as aromatic diamines and aliphatic diamines which are used to produce polyesters, nylons etc. where they are used as monomers.. Full Research Report On Global Isophorone Market Analysis available at: https://www.millioninsights.com/industry-reports/isophorone-market. It is used as a hardner in heat cured epoxies. These hardeners are humidity resistant and have a less chance to form carbamates. ...
As part of a large-scale epidemiological study, occupational isocyanate exposure was assessed in spray-painting environments. The aim was to assess which compounds contribute to isocyanate exposure in car body repair shops and industrial painting companies, and to identify tasks with high risk of isocyanate exposure. Mainly personal task-based samples (n = 566) were collected from 24 car body repair shops and five industrial painting companies using impingers with DBA in toluene. Samples were analysed by LC-MS for isocyanate monomers, oligomers and products of thermal degradation. From the 23 analysed compounds, 20 were detected. Exploratory factor analysis resulted in a HDI, TDI and MDI factor with the thermal degradation products divided over the TDI and MDI factors. The HDI factor mainly consisted of HDI oligomers and was dominant in frequency and exposure levels in both industries. Spray painting of PU lacquers resulted in the highest exposures for the HDI factor (,LOD-2643 μg/m3 NCO), with ...
OBJECTIVES: The pathogenic basis of respiratory disorders associated with isocyanates are still obscure. One reason for this is the lack of good estimates of human exposure. In this study exposure was estimated by measurement of isocyanate metabolites in biological samples. METHODS: In a factory using isocyanate based polyurethane (PUR) glue, isocyanate concentrations in air were measured by liquid chromatography. Samples from 174 employees were analysed for metabolites of 4,4-methylene diphenyl diisocyanate (MDI) in plasma (P-MDX) and urine (U-MDX). After hydrolysis, 4,4-methylenedianiline was measured by gas chromatography-mass spectrometry (GC-MS). The employees were screened for work related respiratory symptoms and tested for specific immunoglobulin E (IgE) and IgG antibodies directed against isocyanate conjugated to human serum albumin. RESULTS: The time weighted isocyanate concentrations in air were low (MDI , 0.2-7; hexamethylene diisocyanate (HDI) , 0.1-0.7; 2,6-toluene diisocyanate ...
December 3, 2004 will mark twenty years since the people of Bhopal awoke from their sleep, choking and near-blinded, as methyl isocyanate (MIC) and other toxic gases escaped from Union Carbides pesticide plant. Overnight, a city of 800,000 people became a gas chamber, extinguishing the lives of at least 8,000 people. Union Carbides gas cloud was just the beginning. The settlement Union Carbide negotiated with the Indian government is grossly insufficient and does not cover medical costs or economic losses for those exposed, or for their children, who have also been affected. The hazardous chemicals have not been removed from the plant itself, and continue to contaminate the drinking water for thousands of Bhopal residents.. The International Campaign for Justice in Bhopal (ICJB) calls the ongoing efforts by Union Carbide and its new owner, Dow Chemical, to evade liabilities for Bhopal, a classic case of corporate crime gone unpunished. Bhopal survivors have said from the start, We never ...
[112 Pages Report] Check for Discount on Global Isocyanates Market Research Report 2018 report by QYResearch Group. In this report, the global Isocyanates market is valued at...
[102 Pages Report] Check for Discount on Global Aliphatic Isocyanates Sales Market Report 2017 report by QYResearch Group. In this report, the global Aliphatic Isocyanates market is valued...
0089]The mixture was diluted with acetone and neutralized with 13.58 g potassium hydroxide pellets. 600 g of distilled water was added to the neutralized mixture under high shear to form a stable aqueous solution followed by evaporation under vacuum to remove organic solvents. The final solution was 29.02% solids. [0090]Polyurethane PU-13: An 85 acid number polyurethane made with isophorone diisocyanate and a 2900 Mw polytetrahydrofuran polyol where 100% of the acid groups are neutralized with potassium hydroxide. The overall Mw is 42500. [0091]Polyurethane PU-14: An 85 acid number polyurethane made with isophorone diisocyanate and a 2000 Mw polytetrahydrofuran polyol where 100% of the acid groups are neutralized with potassium hydroxide. The overall Mw is 40500. [0092]Polyurethane PU-15: An 85 acid number polyurethane made with isophorone diisocyanate and a 2000 Mw polytetrahydrofuran polyol where 85% of the acid groups are neutralized with potassium hydroxide. The overall Mw is 27100. ...
The present invention relates to two-component adhesive for bonding wood materials.. Previously polyurethane adhesives used for bonding wood materials, including, in particular, bearing glued wooden structures (wooden building structures), such as, for example, structural elements (laminated wooden beams, wall elements and so on). In such applications are used as two-component and one-component curing in a moist environment, adhesives. In the case of the latter system after application of the adhesive passes the initial reaction between isocyanates and moisture from the ambient air or substrate: part used isocyanate with the release of carbon dioxide is formed corresponding amine and then it reacts with the isocyanate with the formation of urea due to release of CO2.. The reaction of aromatic isocyanates with hydroxyl groups (water or alcohols) by several orders of magnitude faster than the corresponding aliphatic isocyanates. However, the aromatic system makes aromatic isocyanates are sensitive ...
Methylene diphenyl diisocyanate (MDI), widely used to produce polyurethane foams and coatings, is a common cause of occupational asthma. However, few studies have assessed the association of chronic MDI exposure with longitudinal change in FEV1 , and results have been inconsistent. This study evaluated longitudinal change in lung function in a cohort of MDI-exposed workers at a polyurethane factor
Do-it-yourselfers may be exposed to methylene diphenyl diisocyanate and toluene diisocyanate from spray foam insulation or sealing concrete applications.
Methylene diphenyl diisocyanate (MDI) is an important industrial chemical and asthmagenic respiratory sensitizer, however its metabolism remains unclear. In this study we used LC-MS and LC-MS/MS to identify novel reaction products of MDI with oxidized glutathione (GSSG), including an 837m/z [M+H](+) ion corresponding to GSSG bound (via one of its N-termini) to partially hydrolyzed MDI, and an 863m/z [M+H](+) ion corresponding to GSSG cross-linked by MDI (via its two γ-glutamate N-termini) [corrected]. Further studies with heavy isotope labeled and native reduced glutathione (GSH) identified an [M+H](+) ion corresponding to previously described mono(GSH)-MDI, and evidence for oligomeric GSH-MDI conjugates. This study also investigated transformational changes in MDI after incubation with an S9 fraction prepared from murine liver. LC-MS analyses of the S9 reaction products revealed the formation of [M+H](+) ions with m/zs and retention times identical to the newly described GSSG-MDI (837 and ...
If the answer is Yes to any of these questions, then you may wish to contact DeMarco, Negle & Lane LLP for further information at the email address of [email protected] Please use the subject isocyanate in your email. Emails will give the sender the opportunity to schedule a direct attorney client communication, but the email alone is only an initial inquiry and cannot be used for any other purpose.. If you have worked in any of the industries described in this article, you may be entitled to receive compensation for an isocyanate related injury. Contact DeMarco, Negle & Lane LLP to become informed of the special Isocyanate exposure project and rights to receive compensation for injuries caused by isocyanate exposure.. APPENDIX:. Isocyanates are a group of chemicals that are highly reactive and have a low molecular weight. They are in wide and persistent use in the production and manufacturing of flexible foam products, rigid foam products, chemical based fibers, and chemical based ...
Huntsman Commences Design and Feasibility Studies to Expand its US MDI Manufacturing Plant: Huntsman Corporation (NYSE: HUN) today announced that it has commissioned engineering design studies to increase its global capacity for the manufacture of methylene diphenyl diisocyanate (MDI) through investment at its Geismar, Louisiana site. Commenting on the studies, Anthony P. Hankins, President of Huntsman Polyurethanes, said: &We are studying several options for expansion of …
Acetophenone and benzophenone propiophenone series,Anisole and phenol and thiophenol series,Aniline series,Benzaldehyde and benzaldehyde oxime and phenylpropionaldehyde and phenyl acetaldehydeseries,Benzene and biphenyl series,Benzoic acid and benzoyl chloride series,Benzonitrile and benzoylacetonitrile and Benzamide Thiobenzamide series,Benzotrifluoride series,Benzyl alcohol and benzyl halogen and phenethyl alcohol and Styrene,Benzylamine and phenylethylamine series,Boronic acid series,Cinnamic aldehyde and Cinnamic acid series,Indole and indanone,Isatin and benzene sulfonylchloride and benzoylformate series,Phenyl acetonitrile and Phenylacetic acid and phenylpropionic acid and benzoylacetate series,Phenyl isocyanate phenyl isothiocyanate series,Phenylhydrazine series,Phthalic acid and anhydride series,Other,,Aromsyn Co.,Ltd.
What does net carbon negative mean exactly?. Lets start with carbon neutral. Simply put, this means that an activity releases net zero carbon emissions into the atmosphere. The next best thing is net carbon negative! This means that an activity goes beyond achieving net zero carbon emissions to actually create an environmental benefit by removing additional carbon dioxide from the atmosphere.. West Fraser has taken a number of steps to reduce its carbon footprint. For example, SterlingOSB Zero is the only UK-manufactured oriented strand board with zero added formaldehyde (ZAF). The resin binder used instead, methylene diphenyl diisocyanate (poly-urethane MDI), requires less heat energy to cure. Combining all of the measures taken by West Fraser in Europe, each cubic metre of SterlingOSB Zero sequesters (locks-in) 1,182 kg of CO2.. It is easy to visualise 1m3 of OSB but what about a tonne of CO2? Consider this time next time you make a cup of tea: to emit the same 1017 kg of CO2 as is ...
12 Senthilkumar CS, Malla TM, Sah NK, Ganesh N. Methyl isocyanate exposure and atypical lymphocytes. Int J Occup Environ Med 2013; 4(3):167-168.-1313 Senthilkumar CS, Akhter S, Malla TM, Sah NK, Ganesh N. Increased micronucleus frequency in peripheral blood lymphocytes contributes to cancer risk in the methyl isocyanate-affected population of Bhopal. Asian Pac J Cancer Prev 2015; 16(10):4409-4419.. For the past three decades, the government and non-government organizations have been striving to understand the MIC-induced late effects in the BMAP. A large body of peer-reviewed epidemiological, clinical, and experimental evidence accumulated from case-only, case-control, and cohort studies have substantiated the MIC-induced late effects. Several clinical studies show respiratory complications in the MIC-exposed survivors. A retrospective observation of spirometry indicates the relative risk of pulmonary function anomalies amongst young survivors of the disaster. Smoking habits appeared to ...
The Dow Chemical Co. will further extend part of its polymeric methylene diphenyl diisocyanate (PMDI) operations at its LaPorte, Texas, facility, while the companys new 500-million-lb PMDI facility in Freeport, Texas, continues its startup process.
Vencorex announced that it is expanding the capacity for its aliphatic isocyanates product range, including HDI, IPDI, Tolonate and Easaqua grades, as well as new products. According to the company, several industrial projects will enhance its ability to serve the growing market for years to come.
RTECS access number CZ6300000 CZ6310000 CZ6200000 Wiswesser line notation OCNR Bl ENCO OCNR Bl CNCO - Shipping ID number UN 2078 - UN 2078 OHM TADS number - 1- 7217313 Hazard substances data bank number 0874 5272 6003 ------------------------------------------------------------------- a Crude toluene diisocyanate (unidentified isomers). CAS No. 1321- 38-6 and chemical abstracts name benzene, diisocyanatomethyl-. The chemical, common, and trade names for toluene diisocyanates are listed in Table 2. Table 2. Toluene diisocyanates: Synonymous and Trade Names -------------------------------------------------------------------- I. Commercial mixtures: 2,4-, 2,6-isomers Chemical abstracts name benzene, 1,3-diisocyanatomethyl- Other chemical names diisocyanatotoluene; isocyanic acid; methyl- m-phenylene ester; methyl- m- phenylene isocyanate; methylphenylene isocyanate; toluene diisocyanate; tolylene diisocyanate Common name TDI Trade names Desmodur T65 (also-T80); Hylene T (also, -TCPA, -TLC, -TM, ...
The present invention is directed to an aqueous polyisocyanate dispersion which has an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and b) reacting the dispersed polyisocyanate with i) a primary or secondary monoamine containing at least one hydroxyl group in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.7:1.0 and ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.4:1.0, wherein component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and provided that the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0. The present invention is also directed
Looking for online definition of isocyanate or what isocyanate stands for? isocyanate is listed in the Worlds largest and most authoritative dictionary database of abbreviations and acronyms
Colorimetric / paper tape technology provides quick gas detection of isocyanates MDI, TDI & HDI but can also be used to measure toxic gases to meet the needs of health and safety professionals who require a portable / personal gas monitoring.
When exposed to them, isocyanates can induce serious injuries in the respiratory tract and irritation on the skin and in the eyes. They are therefore interesting from the point of view of occupational health. The purpose of this thesis was to collect isocyanates in air with impinger-filter samplers and solvent free samplers. Furthermore the isocyanates were to be analyzed with liquid chromatography-mass spectrometry. The solvent free sampler consists of a polypropylene tube and filter holder fitted with glass fiber filters impregnated with derivatization reagent, coupled with a pump. The impinger-filter sampler was made out of an impinger flask, containing a derivatization solution, coupled in series with a filter holder and a pump. Di-n-butylamine was used as derivatization reagent in both samplers to stabilize the reactive isocyanates and to enable mass spectrometric detection. The solvent free sampler is highly advantageous because of its user friendliness during field measurements, as ...
A catalytic hydroamidation of alkynes with isocyanates using alkyl bromides as hydride sources has been developed. The method turns parasitic β-hydride elimination into a strategic advantage, rapidly affording acrylamides with excellent chemo- and regioselectivity.. ...
The South Korean market for compounds with other nitrogen function (excluding isocyanates) soared to $ in , picking up by % against the previous year. This figure reflects the total revenues of producers and importers (excluding logistics costs, retail marketing costs, and retailers margins, which will be included in the final consumer price). The market value increased at an average annual rate of +% from 2007 to ; the trend pattern indicated some noticeable fluctuations being recorded in certain years. As a result, consumption reached the peak level and is likely to continue growth in the immediate term.
Novel curing agents for heat-curable single package epoxy resins, the agents being adducts of aminoalkyl imidazoles with isocyanates. Cures are effected on heating the epoxy resin for times as short as 5 seconds.
This study is the first to analyse the soluble factors secreted by the bronchial epithelium after exposure to isophorone diisocyanate (IPDI) that are responsible for increasing migration and proliferation of primary normal human bronchial smooth musc
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was blended with poly(lactic acid) (PLA) with various reactive processing agents to decrease its brittleness and enhance its processability. Three diisocyanates, namely, hexamethylene diisocyanate, poly(hexamethylene diisocyanate), and 1,4-phenylene diisocyanate, were used as compatibilizing agents. The morphology, thermomechanical properties, and rheological behavior were investigated with scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, tensile testing, dynamomechanical thermal analysis in torsion mode (dynamic mechanical analysis), and oscillatory rheometry with a parallel-plate setup. The presence of the diisocyanates resulted in an enhanced polymer blend compatibility; this led to an improvement in the overall mechanical performance but did not affect the thermal stability of the system. A slight reduction in the PHBV crystallinity was observed with the incorporation of the diisocyanates. The ...
Theses Superfund Sites were just the tip of the iceberg. In the middle of the night on December 3, 1984, Union Carbide had a leak of Methyl Isocyanate in Bhopal, India that resulted in the death of 3,800 and the serious injury of thousands of more. Union Carbide assured the U.S. Government that such a leak could not occur here. However, in December of 1985, Union Carbide has a similar but smaller leak of the same chemical in West Virginia. After that, Congress acted quickly and in 1985 the SARA Title III Act was signed into law. This act included public right to know laws, enforcement for EPA laws, set up local oversight or LEPC committees in each county, provided guidelines for community response to a toxic release and funding for that response which was the genesis for HazMat Teams ...
Union Carbide News. Find breaking news, commentary, and archival information about Union Carbide From The tribunedigital-sunsentinel
The present invention relates to a process for preparing mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates by sequential reaction of benzene to nitrobenzene to aniline to polyphenyl polymethylene polyamines to polyphenyl polymethylene polyisocyanates wherein the benzene used as the starting material contains 500 to 5000 ppm w/w toluene and/or xylenes.
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TY - JOUR. T1 - Death due to asthma at workplace in a diphenylmethane diisocyanate-sensitized subject. AU - Carino, Mauro. AU - Aliani, Maria. AU - Licitra, Carmelo. AU - Sarno, Nicola. AU - Ioli, Francesco. PY - 1997/1. Y1 - 1997/1. N2 - Total cases of fatal asthma in the occupational setting reported in the literature are reviewed and the case of a 39-year-old foundry worker who died at work is described. A diagnosis of occupational asthma induced by diphenylmethane diisocyanate (MDI) had been assessed 5 years in advance through a 0.005 ppm exposure inhalation challenge. Postmortem microscopic examination of the lung showed epithelial desquamation, eosinophilic/neutrophilic infiltration of the mucosa, dilatation of bronchial vessels, edema, hypertrophy and disarray of smooth muscle. Fatal asthma attack in a MDI-sensitized individual, to our knowledge, has not been previously described.. AB - Total cases of fatal asthma in the occupational setting reported in the literature are reviewed and the ...
United States Patent 3,632,620 PREPARATION OF ISOCYANATES FROM CARBODIHVIIDES Ehrenfried H. Kober, Hamden, and Wilhelm J. Schnabel, Branford, C0nn., assignors to Olin Mathieson Chemical Corporation No Drawing. Filed June 26, 1968, Ser. No. 740,064 Int. Cl. C07c 119/04 US. Cl. 260-453 P 4 Claims ABSTRACT OF THE DISCLOSURE Organic carbodiimides are reacted with carbon monoxide and/or carbon dioxide in the presence of a catalyst at an elevated pressure and elevated temperature to produce organic isocyanates. The catalyst is preferably at least one metal or compound of a metal found in Groups Ib, IIb, IIIb, IVa, IVb, Va, VIa, VIb, Illa, VIIa, VIII, and in the Lanthanide series of the Periodic Table. This invention relates to the preparation of organic isocyanates from organic carbodiimides. Organic isocyanates are used extensively in the preparation of urethane foams, coatings, and fibers, as well as in the preparation of insecticides, pesticides and the like. Commercial processes for preparing ...
Isocyanates are highly valued synthetic intermediates. Unfortunately, they are usually synthesized using toxic phosgene. Recently, the Rousseaux group published work demonstrating the in situ generation of various aryl isocyanates through reaction of DMSO, trifluoroacetic anhydride (TFAA), DBU, CO2, and an aryl amine.1 This method not only avoids using phosgene, it also eliminates the need to isolate and purify the isocyanate intermediate for subsequent reaction with either an amine or an alcohol to produce a urea or a carbamate, respectively. This one pot method also is noteworthy in that, in certain cases, purification simply requires a water wash. As shown in Scheme 1, DMSO plays a vital role in the generation of the isocyanate intermediate. DMSO reacts with TFAA to produce the trifluoroacetate sulfonium salt A. This salt acts as a dehydrating agent on the carbamate salt B to produce the isocyanate intermediate C. With the addition of an amine to the reaction mixture, a urea (compound 2) is ...
Bhopal, August 1, 2013: Three decades after it was shut down, the Union Carbide factory in Bhopal continues to be a real danger to the people of Bhopal. Almost every study done to measure the impact of the waste dumped within and outside the site by UCIL has come up with one conclusion there is large-scale contamination in the soil and water of the area where the factory is located.. In the first initiative of its kind, New Delhi-based research and advocacy body Centre for Science and Environment (CSE) has analysed all the studies and their conclusions. CSE released the key findings of its analysis here today at a media briefing. It also released a comprehensive action plan for ridding the site of this contamination.. Between 1969 and 1984, Union Carbide India Limited (UCIL) had produced carbamate pesticides and organochlorine formulations. All these years, the toxic wastes and products were being dumped at several locations inside the plant and in the solar evaporation pond (SEP) outside. After ...
Bhopal, Dec 14 - Terming it as a citizens raid, Bhopal gas tragedy survivors organisations claimed to have seized a large number of sub-standard and expired drugs from two medical stores of the Bhopal Gas Tragedy Relief and Rehabilitation Department ...
The effect of hard segment content and diisocyanate structure on the transparency and mechanical properties of soft poly(dimethylsiloxane) (PDMS)-based urea elastomers (PSUs) was investigated. A series of PSU elastomers were synthesized from an aminopropyl-terminated PDMS (M¯n: 16,300 g·mol−1), which was prepared by ring chain equilibration of the monomers octamethylcyclotetrasiloxane (D4) and 1,3-bis(3-aminopropyl)-tetramethyldisiloxane (APTMDS). The hard segments (HSs) comprised diisocyanates of different symmetry, i.e., 4,4′-methylenebis(cyclohexyl isocyanate) (H12MDI), 4,4′-methylenebis(phenyl isocyanate) (MDI), isophorone diisocyanate (IPDI), and trans-1,4-cyclohexane diisocyanate (CHDI). The HS contents of the PSU elastomers based on H12MDI and IPDI were systematically varied between 5% and 20% by increasing the ratio of the diisocyanate and the chain extender APTMDS. PSU copolymers of very low urea HS contents (1.0-1.6%) were prepared without the chain extender. All PSU elastomers ...
J67.8 - Hypersensitivity pneumonitis due to other organic dusts answers are found in the ICD-10-CM powered by Unbound Medicine. Available for iPhone, iPad, Android, and Web.
A malfunctioning seal in the gear-reduction box of a turboprop aircraft engine could allow oil to enter the turbines compressor section, which is the source of bleed air used to pressurize the cabin. Oil, or its degradation products, could have a deleterious effect on crew and passengers. A series of tests sponsored by the National Transportation Safety Board had examined the possibility that contaminated bleed air might contain toxic products identifiable by chemical analysis, but none of the gases for which they analyzed were present in toxic concentrations. However, the approach did not eliminate the possible presence of an additional component with significant animal toxicity. The research reported here examined the toxicity of thermal degradation products from aircraft lubricating oils and some related products. Rats were exposed to smoke from these products and relative toxicity evaluated in terms of time-to-incapacitation and time-to-death. The carbon monoxide (CO) content of the smoke ...
BHOPAL: Children with congenital defects born to parents exposed to the gas leakage in Bhopal in 1984 should be identified and treated, demanded an NGO running a clinic for the survivors of the worlds worst industrial disaster ahead of its 31st anniversary. Over 3,000 people were believed to have died in the Bhopal gas leak…
Global Aliphatic Isocyanates Market Research Report 2017 is a market research report available at US $2900 for a Single User PDF License from RnR Market Research Reports Library.
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The thermal degradation products of roasted seeds of the ben tree were compared to the non-roasted seeds. Analysis showed that 4(alpha-L-rhamnosyloxy) phenylacetonitrile is a thermal degradation product of 4(alpha-L-rhamnosyloxy) benzyl glucosinolate during roasting.
Rigid polyurethane foams of significant renewable content (up to 50%) were produced using biomass biopolyols obtained previously via crude-glycerol mediated solvothermal liquefaction of three industrial biomass residue feedstocks: digested sewage sludge, hemp stalk hurds and sugar beet pulp (DSS, HSH and SBP), and commercial diphenylmethane diisocyanate. The produced foams exhibited higher apparent densities 43-160 kg/m3 and compressive strengths 34-254 kPa compared to tested commercial analogues. Varying foam formulation isocyanate-to-hydroxyl group ratios and blending biomass biopolyols with blank crude glycerol biopolyols led to lighter and less strong products. Blank crude glycerol and DSS biopolyol foams exhibited slowest water absorption rates. Biopolyol foams exhibited higher thermal stability and the non-flame retarded foams showed lower potential for fire spread due to lower pyrolysis gas combustion heat release rates and total released amounts of heat. In terms of fire toxicity, ...
BHOPAL, India -- Thousands protested in India Saturday against the countrys decision to compete in the London Olympics despite sponsorship of the Games by a US firm linked to the 1984 Bhopal gas tragedy.. Marking the 27th anniversary of the industrial disaster which killed tens of thousands of people, protesters gathered at two sites in the central city of Bhopal to demand India pull out from the Games, which are sponsored by Dow Chemical.. Dow Chemical bought Union Carbide, the firm blamed for the lethal gas leak, a decade after the company had settled its liabilities with the Indian government by paying $470 million for Bhopal victims.. This protest is against both the Olympics and government indifference towards gas victims, activist Rachna Dhingra of the Bhopal Group for Information and Action told AFP.. As placard-waving protesters attempted to block trains travelling to and from the Bhopal railway station, police baton-charged the crowd, which responded by pelting stones at the ...
Huntsman Polyurethanes Offers New Isocyanate for Coatings ● Huntsman Polyurethanes has introduced Rubinate 9447 isocyanate. This low viscosity product, approximately 700 cps, is used to manufacture polyurea c
1. The height of apathy towards the concerns of the Bhopal gas victims both by the Central as well as the State Governments can be gauged by the fact that till date only a fraction of the Bhopal gas victims have been issued health booklets. Issuance of health booklet is crucial for recording the medical history of a gas-victim in terms of diagnosis, investigations and treatment. In the absence of such health booklets and the consequent inability of a gas-victim to prove the degree of injury suffered by him/her has resulted in the gas-victim being denied adequate compensation based on the nature of the injury that was inflicted on him/her. As a result, the bulk of the gas-victims have been awarded compensation for minor/temporary injury although many of the victims had actually suffered serious/permanent injury and are still undergoing medical treatment or have since died due to the seriousness of the injuries that were inflicted on them by the Bhopal disaster. We again demand that health ...
OSHA National Alliances | American Chemistry Council (Center for the Polyurethanes Industry, Diisocyanates Panel, and Aliphatic Diisocyanates Panel)
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He said that MP government, under appeal, has demanded that punishment awarded to the convicts in different sections of IPC should go consecutively instead of concurrent sentence for maximum term of two years under section 304 (A) (causing death by rash and negligence not =amounting to homicide) of IPC. We want that instead of one year punishment awarded under section 338 (causing grievous hurt by act endangering life or personal safety of others), the convict should get two years imprisonment, he ...
Principal Investigator:UEDA Atsushi, Project Period (FY):1990 - 1992, Research Category:Grant-in-Aid for General Scientific Research (B), Research Field:Hygiene
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Agencies, Bhopal Five organisations, working for rights of the 1984 Bhopal gas tragedys survivors, today demanded Chief Minister Shivraj Singh Chouhans
D4889 - 15 Standard Test Methods for Polyurethane Raw Materials: Determination of Viscosity of Crude or Modified Isocyanates , dynamic viscosity, isocyanates, kinematic viscosity, polyurethane raw materials, rotational viscosity, viscosity,,
Methylene diisocyanate (MDI) and a catalyst such as an organic tin or bismuth salt, provide the required rate of reaction. The size of the exotherm is such that the reaction proceeds to its full extent. 1 Urea and Urethane Reactions Introduction Compounds that contain the N-H group are all potentially reactive toward isocyanates. Simple primary amine groups are very reactive even at temperatures of between 0 ◦ C and 25 ◦ C, giving disubstituted ureas in high yields. Secondary aromatic amines are slightly less reactive. The mercury catalysts are both toxic and caustic. Bismuth catalysts promote the isocyanate and OH reaction from the isocyanate side. This has the effect of reducing the water reaction and hence reduces the liberation of carbon dioxide gas. They are particularly useful in controlling the reactions when used in one-shot systems. General Catalysts are commonly used to control the pouring and gel times of polyurethane systems. As catalysts are used in small quantities, the addi- ...
Surviving victims of 1984 gas leak tragedy from the plant of Union Carbide in Bhopal, Madhya Pradesh, staged a protest rally at which they demanded...
Polymers have been considered as important materials in fabrication of microstructures for various medical purposes including drug delivery. This study evaluates polyurethane as material for hollow microstructures preparation. Polyurethane microstructures were obtained by interfacial polyaddition combined with spontaneous emulsification and present slightly acid pH values. Scanning electron microscopy revealed the existence of irregular shapes and agglomerated microstructures. The material is heat resistant up to 280°C. Good results were recorded on murine skin tests in case of polyurethane microstructures based on isophorone diisocyanate. Mesenchymal stem cells viability presents good results for the same sample after 48 hours based on the Alamar Blue test. The research revealed the reduced noxiousness of this type of microstructures and consequently the possibility of their use for therapeutic purposes.
Foams having aspartase-producing microorganisms bound to the foam are made from polyurethane prepolymers which are capped with polyisocyanates, including diisocyanates, derived from methylene-bis (phenyl isocyanate) which is commonly known as MDI. These MDI based foams are hydrolysis resistant as compared to the previously used TDI based foams. The foams can be used to produce L-aspartic acid under high pH conditions.
ILO: International Labour Organization - The International Labour Organization is the UN specialized agency which seeks the promotion of social justice and internationally recognized human and labour rights
The Council review to ascertain the long-term health impact of the Bhopal gas tragedy showed lung cancer and chronic lung disease cases had increased slightly, he told The Hindu on the sidelines of a four-day seminar on `Prevention of biomedical risks, at the French Institute here ...
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ILO: International Labour Organization - The International Labour Organization is the UN specialized agency which seeks the promotion of social justice and internationally recognized human and labour rights
Union Carbide was a member of the Industrial Hygiene Foundation, which commissioned a study that linked chrysotile, the type of asbestos sold by the company, to cancer. But then the group publicly reported just the opposite. And in the 1960s, he said, a few years after Union Carbide discovered the worlds largest cache of asbestos in California and opened its mill near King City, its own tests indicated that Calidria caused more damage to the lungs of rats than the asbestos sold by Johns-Manville.. Instead of telling companies and people and stopping the asbestos market right there, they hide it, Lanier told jurors. They start pushing their asbestos in every product they can because, you see, that disease of asbestosis takes 20 or so years before you get it. The cancer takes 20, 30, 40 years before you get it. And these guys were going to make their killings right then.. In the early 1970s, Lanier contended, Union Carbide began to realize that in a few years, its customers would recognize ...
Preferred Name: Laromustine Definition: A sulfonyl hydrazine prodrug with antineoplastic activity. Laromustine releases the DNA chloroethylating agent 90CE after entering the blood stream; 90CE chloroethylates alkylates the O6 position of guanine, resulting in DNA crosslinking, strand breaks, chromosomal aberrations, and disruption of DNA synthesis. Intracellular metabolism of this agent also releases methyl isocyanate which inhibits O6-alkyl-guanine transferase, an enzyme involved with DNA repair. NCI-GLOSS Definition: A drug used to treat acute myelogenous leukemia (AML). It is also being studied in the treatment of several other types of cancer. It blocks cell growth by damaging the cells DNA and may kill cancer cells. It is a type of alkylating agent. Display Name: Laromustine Label: Laromustine NCI Thesaurus Code: C2653 (Search for linked caDSR metadata) (search value sets) NCI Metathesaurus Link: C2713559 (see NCI Metathesaurus info) Synonyms & Abbreviations: (see Synonym Details) ...
Set in mid-2011, the story takes place over the course of a week.[5] James Bond is a former Royal Naval Reserve officer who has recently joined the Overseas Development Group - a covert operational unit of British security under the control of the Foreign and Commonwealth Office tasked to identify and eliminate threats to the country by extraordinary means. Bond is employed within the 00 Section of the Operations Branch.. He starts his assignment on the outskirts of Novi Sad in Serbia where an Irish sapper-turned-enforcer named Niall Dunne is planning to derail a train carrying three hundred kilograms of methyl isocyanate, dumping it into the Danube. Bond is able to prevent the catastrophe by derailing the train himself at a much safer place along the line. He is unable to detain Dunne, who kills Bonds Serbian contacts in the course of his escape.. Using what little intelligence Bond was able to gather from the operation in Serbia, the ODG is able to establish a connection to Green Way ...
Hazards: Avoid contact with the liquid and vapor of the chemicals in this demonstration.. Chemicals and Solutions: 100 ml of polyurethane a (toluene diisocyanate plus extras) 136 ml of polyurethane b (gycerol plus extras). Materials: large plastic beaker (2 L capacity). stirring rod. Procedure: Mix components a and b in the beaker. Stir until the mixture starts to foam.. Hint: Discussion: The polyurethane forms when an isocyanate group (R-N=C=O) from toluene diisocyante reacts with a hydroxyl group from glycerol forming an ester-like bond. The reaction can proceed in three directions since all three hydoxyl groups of the triol can react and both isocyanate groups can react.This leads to a large molecule that is rigidly held into a three dimensional structure.. The foaming is caused by the small amount of water that is present. The water decomposes isocyanate: R-N=C=O + H2O ---, RNH2 + CO2. ...
the victims of the bhopal gas tragedy still live in abject conditions even when the perpetrators of the worst industrial disaster go scot free
A bio-active material such as heparin, urokinase or streptokinase is bonded via a hydrophilic spacer to a functionality on the surface of a hydrophobic, bio-compatible polymeric substrate to provide a coating of the bio-active material on the surface. The substrate surface is preferably the surface of an implantable medical device such as a vascular graft. An amine and/or hydroxyl functionality on the substrate surface is reacted with an isocyanate group at an end of the hydrophilic spacer to bond the spacer to the substrate, and the bio-active material is reacted with an isocyanate group at another end of the spacer to bond the bio-active material to the spacer. Polymeric substrates include expanded polytetrafluoroethylene and polyethylene terephthalate, and the hydroxyl and/or amine functionality may be provided on the substrate surface by plasma glow discharge. A preferred spacer is an isocyanate end-blocked poly(ethylene oxide). Reaction of the functionality of the substrate with the isocyanate
Survivors of the 1984 Bhopal Gas tragedy hold placards and shout slogans during a protest in New Delhi urging US President Barack Obama to hold US Coprporations Dow Chemicals accountable and take action. President Barack Obama heaped praise on his host India on as he set out his vision for relations...
The Union Carbide tragedy shook people up. They had seen, with all the nakedness, the harms that the state causes, harms that in the West are usually hidden behind a softer façade. People in Bhopal had seen the utterly irresponsibility of a state that had monopolized the crisis management machinery and then hijacked it when the crisis erupted. Society realized that behind all the brave sounding talk of the state were extraordinarily spineless and timid people, with absolutely no sense of individual responsibility. They are worse than animals, people would say.. Over those months, I saw people becoming increasingly anti-statist. There were open discussions about making bribery legal, making it a mere transaction cost rather than a huge impediment. People frequently discussed the possibility of privatizing not only industries but particularly law and order, and crisis management machinery.. More of the same. Within months Bhopal faced another wave of social turmoil. On this occasion, the Indian ...
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At a press conference in Calcutta on Sunday 3rd March 2013, doctors from Bhopal confirmed that congenital birth defects in affected areas of the city are seven times higher than usual rates.. Third generations are increasingly born with psychological and physical deformities as a result of widespread water contamination following the worlds worst industrial disaster in 1984.. Over 28 years ago, on the 3rd December 1984, 27 tonnes of deadly gas leaked from a Union Carbide pesticide plant which was built in a heavily populated area of the city. To this day the abandoned factory stands leaking chemicals into the environment nearly 30 years on. The water contamination was widespread around the factory several years prior to the disaster due to the indiscriminate dumping of toxic waste from the plant since it started manufacturing pesticides in 1969.. Surveys have shown that in affected areas of Bhopal 3,000 children out of 20,000 families are suffering from multiple and serious congenital ...
Report by Tim Edwards, Managing Trustee. If you happen to think of the year recently passed in terms of two extraordinary events, please also consider the events Im about to describe.. On September 2nd, Sambhavna Trust marked 20 years service in the care of people harmed by Union Carbide in Bhopal. Within a few days, Chingari Trust reached ten years working to rehabilitate the citys damaged children. In a year of division and turmoil, three decades worth of humanity and hope. And were it not for you (and others like you), it could not have happened.. I was lucky to be in Bhopal for the celebrations. They brought back to me strong and affecting memories, and I hope you dont mind if I take a few moments to share them.. Sambhavna Clinic had been open for three years and was already an important part of local life when I first visited. Long queues formed early each morning in the unpaved road beside its entrance gate. After registering, visitors were seen by one of Sambhavnas three doctors. ...