Both the isocyanates and polyols used to make a polyurethane contain two or more functional groups per molecule. (wikipedia.org)
Polyurethanes are complicated systems made up of isocyanates, polyols, additives, catalysts and blowing agents. (icis.com)
The isocyanates (MDI/TDI) are reacted with polyols to make a urethane used as binders in plywood and other building materials, and foam used in seats, fenders and other automotive parts. (pcimag.com)
Both stress balls and squishies are made of polyurethane, a "polymer" that forms when its component "monomers," namely isocyanates and polyols, are linked together into long chains. (bubbleslidess.com)
Dow is the world's largest producer of propylene oxide (PO), propylene glycol (PG), and polyether polyols, and is a leading producer of quality aromatic isocyanates, such as MDI. (mrchub.com)
Polyurethane foam is made from two ingredients that are traditionally derived from crude oil: di‐isocyanates and polyols. (recticelflexiblefoams.com)
Aromatic isocyanates1
The diisocyanate monomers are important commercially the most important aromatic isocyanates, because the two NCO groups allow them to undergo direct whereas 1,6-HDI, isophorone diisocyanate (IPDI), methyle- polymerization reactions with alcohols to form polyur- nedicyclohexyl diisocyanate (HMDI), and their higher ethanes, in addition to enabling prepolymerization reactions polymers are the most important aliphatic isocyanates. (cdc.gov)
Polyol2
A polyurethane is typically produced by reacting an isocyanate with a polyol. (wikipedia.org)
Glimepiride, according to US 4,379,785 (EP 031058) issued to Hoechst is prepared via reaction of 4-[2-(3-Ethyl-4-methyl-2-carbonyl pyrrolidine amido) ethyl] benzene sulfonamide (IV) with trans-4-methylcyclohexyl isocyanate (VIII). (allindianpatents.com)
Glimepiride (I). The '785 patent teaches the preparation of Glimepiride starting from 3-Ethyl-4-methyl-3-pyrolidine-2-one (II) and 2-phenyl ethyl isocyanate to give [2-(3-Ethyl-4-methyl-2-carbonyl pyrrolidine amido) ethyl] benzene (III). (allindianpatents.com)
Reactive1
Isocyanates are highly reactive chemicals of low- products of even greater complexity. (cdc.gov)
Monomers1
Isocyanates are classified based on the number of N=C=O more aromatic rings) or saturated (aliphatic and alicyclic), groups in the molecule into monoisocyanates (one NCO), the term aliphatic isocyanate referring to saturated isocya- diisocyanate monomers (two NCO), or polyisocyanates nates. (cdc.gov)
Insulation1
Porous materials can be obtained in this way and the porous materials can be used as thermal insulation material and in vacuum insulation panels and vacuum insulation systems, in particular in interior or exterior thermal insulation systems as well as for insulation of refrigerators and freezers and in water tank or ice maker insulation systems. (justia.com)
APS 500 is solvent and isocyanate free, installs at -35 to 140 degrees, and is available in custom colors. (roofingcontractor.com)
Chemicals2
At Huntsman Polyurethanes, a business unit of Huntsman ICI Chemicals LLC, a system of color-coded packaging is helping its customers eliminate confusion, eradicate those occasional bad batches and keep production lines humming. (pcimag.com)
It is manufactured from two chemicals, isocyanate, and chlorobenzene acid, which react when combined and expand 30 times their volume when it is sprayed over exposed surfaces. (platu25.net)
Resin1
Spray foam is a two-component mixture composed of Isocyanate and Resin that come together at the tip of a gun, and form an expanding foam that is sprayed onto roof tiles, concrete slabs, into wall cavities, or through holes drilled in into a cavity of a finished wall. (atlassprayfoam.com)
Polyurethane4
Occupational exposure normally occurs during the production and use of isocyanates-particularly during the mixing and foaming processes in the polyurethane foam industry. (cdc.gov)
Exposures to airborne isocyanates may also occur from the melting or burning of polyurethane foams during fire fighting. (cdc.gov)
RainGuard Pro Polyurethane HD with IsoFree Technology is an isocyanate free two-component, high performance, zero-VOC, odorless, water-based, aliphatic polyurethane coating. (concretedecorstore.com)
Herein, we encapsulated organic PCM n-Octadecane into polyurethane capsules via polymerization of commercially available polymethylene polyphenylene isocyanate and polyethylene glycol at the interface oil-in-water emulsion and studied how various n-Octadecane feeding affected the shell formation, capsule structure, and latent heat storage properties. (bvsalud.org)
Exposure Limits1
However, with multiple different measurement metrics in use, comparison of isocyanate exposure data between studies and development of occupational exposure limits (OELs) for polyisocyanates is difficult. (cdc.gov)
Functional group1
Background Determination of polyisocyanates is important because they are a major contributor of exposure to the isocyanate functional group in many workplace environments and are capable of inducing sensitization and asthma. (cdc.gov)
Acid1
Isovaleric acid is used extensively as a flavoring ingredient innonalcoholic beverages and in foods such as ice cream,candy, baked goods, and cheese, as a fragrance ingredientin perfumes, and as a chemical intermediate in themanufacture of sedatives and other pharmaceutical products.It is also used as an extractant of mercaptans from petroleumhydrocarbons, a vinyl stabilizer, and as an intermediate in themanufacture of plasticizers and synthetic lubricants. (guidechem.com)
Occur2
exposure may also occur through skin contact during the handling of liquid isocyanates. (cdc.gov)
Sources suggest that inefficiency during installation, ignorance of safety measures, and lack of safety valves to prevent the mixing of water into the Methyl isocyanate tanks helps this accident occur. (ecofriend.com)
Polyurethanes1
SAN ANTONIO (ICIS)-Some individual US states are considering restrictions on fluorinated materials that are so broad, they could threaten the use of the latest generation of refrigerants and blowing agents that are used by the polyurethanes industry. (icis.com)
Occupational1
Occupational exposure standards for isocyanates are based on respiratory irritation and sensitization and carcinogenesis. (cdc.gov)
Mixture1
Another suite of instruments called MUPUS used a penetrating "hammer" to reveal a thin layer of dust about an inch thick (~ 3 cm) overlying a much harder, compacted mixture of dust and ice at Abydos. (universetoday.com)
Content3
Access a host of content brought to you by ICIS Experts from around the world. (icis.com)
even at high temperatures in the sauna, infrared cabin or warming room, the sauna veneer releases does not release formaldehyde (except for the natural content in the wood), biocycles or isocyanates to the surrounding air. (fire-ice-sauna.com)
b) trans-4-methyl cyclohexyl amine (VII) and its respective isocyanate (VIII) should have lowest content of the cis isomer. (allindianpatents.com)
Group3
In this report, diisocyanates as a group will be referred to as isocyanates. (cdc.gov)
After graduation, he took up a position at ICI in the acrylics business group. (chemtec.org)
Conclusions The total isocyanate group (mg NCO/m3) is recommended as the most feasible and practical metric (unit) by which to express polyisocyanate exposures for research, control, and regulatory purposes. (cdc.gov)
Price1
ICIS price forecasts have helped us allocate resources smartly and efficiently, to anticipate price changes, and to buy PP at favourable prices. (icis.com)
Analysis2
Methods An analysis of existing problems in the measurement and regulation of isocyanates is presented based on the published analytical, toxicological, and regulatory literature, and the authors' own analytical data and experience with isocyanates. (cdc.gov)
Results This analysis supports a need for standardization of isocyanate measurement metrics and provides a framework for the development of an OEL for polyisocyanates. (cdc.gov)
Data1
Thousands of decisions are taken every day supported by ICIS data. (icis.com)
Form2
This intermediate compound (IV) is then finally reacted with trans-4-methylcyclohexyl isocyanate (VIII) prepared from trans-4-methyl cyclohexylamine HC1 (VII) to form Glimepiride. (allindianpatents.com)
Some resemble popular food items like donuts, ice cream cones, or sushi, while others take the form of cute animals, emojis, or everyday objects. (bubbleslidess.com)
Industry1
View upcoming events and training courses produced by ICIS for the industry. (icis.com)
Products1
Products containing isocyanate or labelled as H332 (harmful). (igbaffiliate.com)
Common1
The most common of these are toluene diisocyanate (TDI), methylene bisphenyl isocyanate (MDI), and hexamethylene diisocyanate (HDI). (cdc.gov)
Prevent1
Unfortunately, this method does not prevent cold air from penetrating into the structure of the roof or attic, so it is necessary to maintain adequate heating and air conditioning ductwork throughout the structure of the home in order to prevent ice dams and thick ice sheets from forming on flat surfaces. (platu25.net)
Items1
Excludes regulated items and items that ship on ice. (tcichemicals.com)
Surface1
not sensitive to humidity and temperature, it can be applied At-28 °C, and can be sprayed on the ice surface. (zindn.com)