Prepolymer polyurethanes. Medical search. Frequent questions

All types of polyol may in theory be used to produce polyurethane prepolymers. (wikipedia.org)
In polyurea prepolymer production, instead of a polyol a polyamine is used. (wikipedia.org)
In the study, a double bond-terminated waterborne polyurethane prepolymer was firstly synthesized from polycaprolactone polyol, toluene diisocyanate, dimethylolpropionic acid and hydroxyethyl methacrylate. (european-coatings.com)
Polyurethane prepolymers are formed by combining an excess of diisocyanate with polyol. (jointwaterstop.com)
Spray-on bedliners have gained popularity in the two-component system, polyurethane (isocyanate and polyol) or polyurea (isocyanate and amine). (cdc.gov)
Prepolymers comprise two principal items: isocyanate and polyol. (screenprintingmag.com)
To simultaneously form films while synthesizing solvent-free and catalyst-free bio-based polyurethanes, hexamethylene diisocyanate trimer was selected as an isocyanate group source to produce a low-viscosity reaction medium for dispersing high contents of microcrystalline cellulose (MCC, polyol) and cellulose nanocrystals (CNC). (bvsalud.org)

The name 'polyurethane' is derived from the main urethane group NH-CO-O that is formed. (pu-schaum.center)
A liquid prepolymer that produces a flexible urethane with the elasticity of rubber. (gluespec.com)
Probably 95%, or more, of printing squeegees used today are of some form of polyurethane, or urethane for short. (screenprintingmag.com)

When polyurethane dispersions are synthesized, a prepolymer is first produced usually modified with DMPA. (wikipedia.org)
There he worked on the scale up of the various polyisocyanates, polyisocyanate prepolymers, polyaspartics and polyurethane dispersions into production. (paintsquare.com)
The above properties make Bayhytherm® polyurethane dispersions attractive as modifiers in other waterborne coating systems, such as acrylate dispersions, to improve flexibility, impact strength and adhesion. (covestro.com)

This article will provide a detailed insight into polyurethane foams. (iqsdirectory.com)
The huge gas phase of polyurethane foams has good thermal and acoustic insulation, high force absorption, low density, and flexibility. (iqsdirectory.com)
Polyurethane foams are sometimes referred to as foam rubber, a broader type of material that include foams made from latex, neoprene, and silicone. (iqsdirectory.com)
Further refining of blowing agents, polyether polyols, and polymeric isocyanates led to the advancement from flexible polyurethane foams to rigid polyurethane foams. (iqsdirectory.com)
The two main types of polyurethane foams are flexible and rigid polyurethane foams. (iqsdirectory.com)
Flexible polyurethane foams can be made slabstock or molding processes from either polyether or polyester polyols. (iqsdirectory.com)
Flexible polyurethane foams are mostly used in furniture, seat cushions, mattresses, and acoustic dampers. (iqsdirectory.com)
Rigid polyurethane foams are denser and have a high percentage of closed cells. (iqsdirectory.com)
This makes rigid polyurethane foams suitable as construction and insulation material. (iqsdirectory.com)
Rigid polyurethane foams can also be manufactured through slabstock and molding processes, with the addition of lamination and spraying. (iqsdirectory.com)
Today, most polyurethane products are foams. (pu-schaum.center)
Up to the start of the 1970s it was only possible to process polyurethane foams industrially. (pu-schaum.center)

Polyurethane Foam: What Is It? (iqsdirectory.com)
Polyurethane foam is a porous, cellular-structured, synthetic material made from the reaction of polyols and diisocyanates. (iqsdirectory.com)
The first patent for flexible polyurethane foam preparation was obtained by Zaunbrecher and Barth in 1942. (iqsdirectory.com)
The flexible polyurethane foam was created through simultaneous polyurethane synthesis and gas generation by combining organic toluene diisocyanate (TDI), aliphatic polyester, water, and catalyst. (iqsdirectory.com)
Initially, polyurethane foam production was done in a two-step process. (iqsdirectory.com)
Microcellular Polyurethane Foam has a fine cellular structure with a density of 0.25 grams to 0.65 grams per cubic centimeter. (iqsdirectory.com)
805 is a single-component, moisture-curing and self-expanding aerosol polyurethane foam. (sealnbond.com)
Otto Bayer demonstrates a foam test with polyurethane during a lecture. (pu-schaum.center)
Even today, you would be hard put to find a refrigerator that is not insulated with polyurethane foam. (pu-schaum.center)
Flexible polyurethane foam for use throughout the year. (casco.eu)

Researchers report the preparation and characteristics of a crosslinked fluorinated acrylate modified waterborne polyurethane for metal protection coating. (european-coatings.com)
Then, waterborne polyurethane prepolymer was modified with styrene, butyl acrylate, glycidyl methacrylate, and dodecafluoroheptyl methacrylate though soap-free emulsion polymerisation method in order to obtain the crosslinked fluorinated acrylate modified waterborne polyurethane (CFWPUA). (european-coatings.com)
The results of infrared spectrum analysis proved the successful synthesis of modified waterborne polyurethane. (european-coatings.com)
Most importantly, in the electrochemical impedance spectroscopy test, the modified waterborne polyurethane coating effectively protects Q235 metal substrate from corrosion in a 3.5 wt% NaCl solution. (european-coatings.com)
Waterborne Bayhytherm® polyurethane stoving coating systems get the job done well. (covestro.com)
This study of waterborne polyurethane prepolymer blends was done to investigate the effects of different types of soft segments on the dispersion properties and other properties of treated nylon fabrics. (tie-2signaling.com)

Since then, polyether polyols have become the major polyols in the polyurethane manufacturing industry. (iqsdirectory.com)
Adiprene® LFP 950A by Lanxess is PPDI-terminated polyether prepolymer. (specialchem.com)

it contains di- and polyfunctional isocyanates with varying percentages of diphenylmethane diisocyanate (MDI monomer), MDI prepolymers, and polymeric MDI. (cdc.gov)
In this one-step process, polyurethane was formed by the reaction of the isocyanates with the hydroxyl-functional groups from the polyester, while its gas phase was formed by the generation of carbon dioxide. (iqsdirectory.com)

Polyurethane coatings that do not have free isocyanate groups in their monomers or pre-polymers. (sbir.gov)
Polyurethane shape memory polymers (SMPU) can be synthesized by crosslinking polyurethane pre-polymers with chemical cross linkers or by using a variety of other methods such as photo-crosslinking or physical crosslinking. (grandviewresearch.com)
Using the material in polyester polyols reportedly enables the creation of new, previously unattainable pre-polymers, helping polyurethane manufacturers create polymers with solvent resistance, hydrolytic stability, optical clarity and toughness that can benefit automotive, food service, medical, and other markets. (adhesivesmag.com)
Polyurethane polymers are found in a wide range of material applications. (bvsalud.org)

Polyurethane is composed of two main ingredients, the prepolymer and the curative. (screenprintingmag.com)

Provided is a polyurethane resin powder composition for slush molding from which an outer skin for an instrument panel can be produced, the outer skin not interfering with deployment of an airbag. (justia.com)
The present invention relates to a polyurethane resin powder composition for slush molding. (justia.com)
In recent years, a thermoplastic polyurethane resin is being used for an instrument panel which is an automotive interior component, because the resin makes it possible to mold a product with a complex shape easily, to obtain uniform wall thickness, and to realize a good yield rate of material. (justia.com)
Most of these are a fiberglass fabric impregnated with polyurethane resin. (teachmeorthopedics.info)

It was shown that these cyclic carbonates can be utilized as prepolymers for the synthesis of non-isocyanate polyurethanes (NIPU). (uni-rostock.de)
The fact that polyurethane could form bubbles during synthesis was discovered by accident. (pu-schaum.center)

The solid phase is made from polyurethane elastomer, while the gas phase is air brought about by blowing agents. (iqsdirectory.com)
Liquid isocyanate terminated prepolymers that yield an elastomer with good tear and tensile strengths, good abrasion resistance, exceptional elongation, and good low temperature properties. (gluespec.com)
A two-component, room temperature curing flexible polyurethane elastomer system. (gluespec.com)

o Crystalline polyurethane adhesives can be used in the automotive industry for rigid bonding surfaces (automotive plastic, carpet, etc. (bostik.com)
PU's key to success lies in its almost legendary adaptability: polyurethanes can be flexible or rigid, hard or soft - and that in every possible degree depending on requirements. (pu-schaum.center)

In polyurethane chemistry, prepolymers and oligomers are frequently produced and then further formulated into CASE applications - Coatings, Adhesives, Sealants, and Elastomers. (wikipedia.org)
Polyurethane Adhesives: With their versatility, polyurethane adhesives can bond both porous and non-porous materials. (rs-online.com)
Bostik is a global leader in one-component Polyurethane Hot Melt adhesives and sealants, often called 1KPU or 1KPUR. (bostik.com)
Polyurethane has been used in adhesives since the 1950s. (bostik.com)
They are classified as one- or two-component polyurethane adhesives, and each category contains several different types of adhesives. (bostik.com)
Reactive one-component polyurethane adhesives have isocyanate functions, which react with atmospheric moisture, or moisture in the substrate. (bostik.com)
One-component Polyurethane adhesives do not require pre-mixing before application, unlike two-component polyurethane adhesives. (bostik.com)
What are the different kinds of one-component reactive Polyurethane Adhesives and Sealants? (bostik.com)
When based on hot melt technology, Bostik's one-component polyurethane adhesives can be reactive, amorphous or crystalline. (bostik.com)
Bostik proposes a complete range of liquid polyurethane adhesives providing high strength for a stong bond, fast curing for fast production, and washing resistance fo a reliable adhesive force, even in humid environments. (bostik.com)
Liquid polyurethane adhesives can be used in sandwich panels for construction and transport, flexible packaging for paper lid laminates, agglomeration of corks, scrubs, and others. (bostik.com)
Within the family of HMPUR, there are amorphous and crystalline one-component polyurethane adhesives. (bostik.com)
This company has announced the commercial availability of Inherent C18 Diacid, a mid-chain length, bio-based diacid that reportedly enables producers of polyamides and polyurethanes, lubricants, and adhesives to expand their portfolios with products that can demonstrate performance not possible from products made with the more common, shorter-chain diacids. (adhesivesmag.com)
One-component, moisture-curable polyurethane adhesives exhibit excellent handling strength before being fully cured, and excellent creep properties after curing. (justia.com)
The adhesives include an isocyanate-terminated prepolymer made from polyols that include a crystalline polyester and hydroquinone bis (2-hydroxyethyl) ether, and a polyoxazolidine compound. (justia.com)

The thermal, thermo-mechanical, and shape memory properties of thermoplastic polyurethane were studied by means of differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and various practical experiments. (mdpi.com)
The second layer at least comprises a polycaprolactone-based thermoplastic polyurethane. (patentsencyclopedia.com)

The first polyurethane was formed by the reaction between a diamine-forming polyurea and an aliphatic diisocyanate. (iqsdirectory.com)
The polyurea was later replaced by glycol due to the enhanced properties of the polyurethane created. (iqsdirectory.com)
1Department of Occupational and Environmental Medicine, MIFACE, Michigan State (polyurethane) or amine (polyurea) component. (cdc.gov)

Hexamethylene diisocyanate is a highly reactive synthetic chemical that is widely used in the production of polyurethane materials. (cdc.gov)
There is evidence that diisocyanate prepolymers may induce asthma at the same or greater frequency as the monomers (Seguin et al. (cdc.gov)
Our main goal in this research study was to deduce the genetic and mechanistic basis for susceptibility to diisocyanate -induced asthma (DA) caused by exposure to the components of polyurethane-based products. (cdc.gov)
Clearcoats used for painting automobiles are one example of polyurethane-based products that consist of 1,6-hexamethylene diisocyanate (HDI) prepolymers. (cdc.gov)
In this research, the poly(tetramethylene oxide) (PTMO, M.W. = 2900) and the 4,4 '- diphenylmethane diisocyanate (MDI) with a molar ratio of 1:3 were reacted at 60-70 oC in nitrogen atmosphere to form the prepolymer(pre-PU). (ncl.edu.tw)

o Amorphous polyurethane becomes more viscous and tacky when cooling and has excellent adhesion on difficult substrates like fluorocarbon-treated textiles or membranes but remains soft. (bostik.com)
The second step was the development of a valve through which the viscous polyurethane could be pressed without immediately clogging the valve. (pu-schaum.center)

Capa polyols and prepolymers has a lower density than polyester polyols hence the weight is lighter with capa which enables light weight end products and efficiency in transportation etc. (perstorp.com)

In polymer chemistry, the term prepolymer or pre-polymer, refers to a monomer or system of monomers that have been reacted to an intermediate-molecular mass state. (wikipedia.org)

Reactive hot-melt polyurethane adhesive (HMPUR) is a 100 % solids content, solvent-free adhesive. (bostik.com)
Two-component polyurethane structural bonding adhesive has high bonding strength to aluminum, good toughness, and certain thermal conductivity. (industryglue.com)

DOW - Free Report ) has announced the commencement of operation of a new MDI distillation and prepolymer facility at its world-scale manufacturing facility in Freeport, TX. (zacks.com)
American chemicals and materials giant Dow revealed plans Wednesday to construct a new integrated MDI distillation and prepolymers facility at its manufacturing site in Freeport, TX. (powderbulksolids.com)

Polyurethanes (PU) are a highly versatile group of plastics that we find wherever we look today. (pu-schaum.center)

Covestro launches the production of Desmodur® 15 prepolymers at its Spanish site of Barcelona. (plastemart.com)
We are opening the new production unit for our Desmodur® 15 prepolymers in Barcelona in parallel to the ongoing expansion of our NDI capacities in the Asia-Pacific region with the Map Ta Phut plant in Thailand, ' explains Thomas Braig, head of Covestro Elastomers. (plastemart.com)

One single component polyurethane sealant contains 600 ml and a box contains 20 sealants. (jointwaterstop.com)

As a result, one-component polyurethanes are an excellent option for flexible lamination, building and construction, transportation, and assembly applications. (bostik.com)

They comprise around 67% of global polyurethane production, with an estimated market of around $37.8 billion in 2020. (iqsdirectory.com)

HDI and HDI prepolymers may be released to the atmosphere during spray applications of polymer paints containing residual amounts (1%) of HDI (Alexandersson et al. (cdc.gov)
Waste streams from HDI or HDI polymer production facilities may release HDI or HDI prepolymers to air, water, and soil. (cdc.gov)

The discovery of polyurethanes is attributed to Otto Bayer, dating back to the year 1937 together, and his coworkers at the laboratories of I.G. Farbenindustrie A.G. in Germany. (iqsdirectory.com)
The chemist Otto Bayer, who was born in 1902, developed the first polyurethane in 1937 and registered it for patent. (pu-schaum.center)

The company shut down its polyurethane assets at the La Porte site in connection with the start-up of the new MDI operations. (zacks.com)
At the same time, the company plans to shut down the polyurethane assets at its La Porte location. (powderbulksolids.com)

This two-step process starts with the polymerization process (prepolymer preparation) and is followed by gas generation. (iqsdirectory.com)

The prepolymer is methylene bisphenyl diisolynate, which converts to a nontoxic polymeric urea substitute. (teachmeorthopedics.info)

and photocatalytic particles within the polyurethane binder. (patentsencyclopedia.com)

This MDI investment optimizes our existing asset infrastructure and enhances our global polyurethanes leadership position, further enabling us to support downstream systems customers' growth," Jane Palmieri, president of the Industrial Intermediates & Infrastructure operating segment for Dow, in a company release. (powderbulksolids.com)

One-component polyurethanes are well-known for their elastic properties that enable less shrinkage deformation during curing and better absorption of external pressure from vibrations and impacts, high mechanical performances, and adhesion to a wide variety of substrates. (bostik.com)
Since polyurethane is not purely elastic, some of the stored energy is lost in the return. (casterconcepts.com)

The general population may be exposed to HDI and HDI prepolymers during the nonoccupational use of polyurethane paints (Musk et al. (cdc.gov)
Even state-of-the-art high-performance paints, sports shoes, flooring or medical prostheses all have a common base: polyurethane. (pu-schaum.center)

The back integration at the Freeport site creates a cost competitive supply of key upstream polyurethane raw materials, enables a reliable supply position to support our growth in downstream high-value polyurethane markets and delivers a more sustainable production process. (powderbulksolids.com)
We design casters made with tread materials of polyurethane, rubber, TPU and nylon. (stellana.com)
Our heavy-duty wheels for casters are available in a variety of materials which include polyurethane, Nylon, or rubber. (stellana.com)
In the heavy duty caster world, polyurethane is one of the most common tire materials used on wheels. (casterconcepts.com)
One of the new materials was polyurethane, which was developed by Bayer in Germany. (screenprintingmag.com)

Based on the physical and chemical properties of the polyurethane sealant, it has many advantages. (jointwaterstop.com)
It imparts very good properties to cast polyurethane elastomers. (specialchem.com)

Polyurethanes make for a versatile tire material - it can withstand heavy loads, high speeds, shock loads, and various chemicals, all while protecting expensive floors. (casterconcepts.com)

The first layer at least comprises a polyester-based polyurethane, a polycarbonate-based polyurethane or a combination or blend of both. (patentsencyclopedia.com)

But even if we limit the discussion to polyurethane squeegees, the scope of available formulations and the resulting balances of performance and cost can be extreme. (screenprintingmag.com)

A material comprising a prepolymer and filler is first dispensed through a nozzle to form an extrudate deposited on a base. (justia.com)
Its main material of the caulk-applied hydro-swelling sealant is polyurethane prepolymers. (jointwaterstop.com)

The vertical wicking height of the treated nylon fabrics decreased slightly when the treating agent contained a small amount of the polydimethylsiloxane polyurethane prepolymer. (tie-2signaling.com)

Our polyurethane products are available in a wide range of durometers. (stellana.com)

Except for limited data on occupational exposures, no information was found in the available literature related to the potential for human exposure to prepolymers of HDI. (cdc.gov)

Combining the mechanical characteristics with dynamic load-bearing capacity, elastomers based on Desmodur® 15 prepolymers are not only one of the most powerful cast polyurethanes in the market, but they are also as easy to process as conventional prepolymers. (plastemart.com)

What are advantages of polyurethane spider coupling? (pepsenpu.com)

The forecast and analysis of MDI Prepolymers market by type, application, and region are also presented in this chapter. (marketresearch.com)
Chapter 9 focuses on the application of MDI Prepolymers, by analyzing the consumption and its growth rate of each application. (marketresearch.com)
It also foresees the MDI Prepolymers market by type and application. (marketresearch.com)
The authors of the patent specification that was used to register polyurethane for patent spoke of a 'Plastic that can be used for various application fields. (pu-schaum.center)

Anatomy1

Diseases2

Chemicals and Drugs16

Analytical, Diagnostic and Therapeutic Techniques and Equipment8

Phenomena and Processes1

Technology, Industry, Agriculture12

Polyol7

Urethane3

Dispersions3

Foams12

Foam10

Waterborne6

Polyether2

Isocyanates2

Polymers4

Curative1

Resin4

Synthesis2

Elastomer3

Rigid2

Adhesives15

Thermoplastic2

Polyurea3

Diisocyanate5

Viscous2

Polyols1

Monomer1

Adhesive2

Distillation2

Plastics1

Covestro2

Sealants1

Flexible1

Comprise1

Polymer2

Otto Bayer2

Porte2

Polymerization process1

Polymeric1

Particles1

Segment1

Elastic2

Paints2

Materials5

Properties2

High1

Polyester1

Scope1

Material2

Nylon1

Products1

Exposure1

Process1

Advantages1

Application4