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Isocyanate - Wikipedia
https://en.wikipedia.org/wiki/Isocyanate
WebIsocyanate. The isocyanate functional group. In organic chemistry, isocyanate is the functional group with the formula R−N=C=O. Organic compounds that contain an isocyanate group are referred to as isocyanates. An organic compound with two isocyanate groups is known as a diisocyanate.
DA: 87 PA: 41 MOZ Rank: 34
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Diisocyanates Explained - American Chemistry Council
https://www.americanchemistry.com/industry-groups/diisocyanates-dii/diisocyanates-overview/diisocyanates-explained/
WebSince the late 1940s, diisocyanates — a family of versatile chemical building blocks — have been utilized to make polyurethane products, such as rigid and flexible foams, coatings, adhesives, sealants and elastomers (CASE). Many of the products we rely upon every day are enhanced because of diisocyanates.
DA: 24 PA: 39 MOZ Rank: 60
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Polyurethanes & Diisocyanates - Chemical Safety Facts
https://www.chemicalsafetyfacts.org/chemicals/polyurethanes-diisocyanates/
WebJul 26, 2023 · Diisocyanates. Diisocyanates are a family of chemical building blocks used to make a wide range of polyurethane products. The most widely used aromatic diisocyanates are toluene diisocyanate (TDI) and methylene diphenyl diisocyanate (MDI).
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Diisocyanate - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/chemistry/diisocyanate
WebAbstract. Diisocyanates are the most common cause of occupational asthma in many industrialized nations, and various pathogenic mechanisms have been suggested to be involved. Methylenediphenyl diisocyanate (MDI) exposure is monitored by analyzing biomarkers in hydrolyzed urine and plasma.
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A brief overview of properties and reactions of diisocyanates
https://journals.sagepub.com/doi/full/10.1177/07482337221090709
WebMay 8, 2022 · For the DII, methylenediphenyl diisocyanate (MDI—also called diphenylmethane diisocyanate) and toluene diisocyanate (TDI) are the most widely used PU raw materials. Chemical structures are included in Table 1. MDI and TDI are available as pure isomers or as isomer mixtures.
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Introduction to Polyurethane Chemistry - ACS Publications
https://pubs.acs.org/doi/pdf/10.1021/bk-2021-1380.ch001
Webdiisocyanate polyaddition reactions by Dr. Otto Bayer and partners (1). In 1937, it reached industrial-scale synthesis and it was established in the market in the 1950s. Polyurethanes are characterized by the presence of a urethane linkage, and they can be easily synthesized through an addition reaction between alcohol and an isocyanate.
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Toluene diisocyanate - Wikipedia
https://en.wikipedia.org/wiki/Toluene_diisocyanate
WebToluene diisocyanate ( TDI) is an organic compound with the formula CH 3 C 6 H 3 (NCO) 2. Two of the six possible isomers are commercially important: 2,4-TDI (CAS: 584-84-9) and 2,6-TDI (CAS: 91-08-7). 2,4-TDI is produced in the pure state, but TDI is often marketed as 80/20 and 65/35 mixtures of the 2,4 and 2,6 isomers respectively.
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Diisocyanate - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/engineering/diisocyanate
WebHexamethylene diisocyanate (HDI) is an important chemical building block in the production of high value-added polyurethane because of its some excellent properties. Traditionally, the HDI synthesis route involves extremely toxic phosgene as an industrial scale reagent.
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Fast Facts and Frequently Asked Questions
https://www.americanchemistry.com/industry-groups/diisocyanates-dii/fast-facts-and-frequently-asked-questions
WebWhat are diisocyanates? What is the difference between aromatic and aliphatic diisocyanates? What is toluene diisocyanate (TDI) and why is it important? What is methylenediphenyl diisocyanate (MDI) and why is it important? What is hexamethylene diisocyanate (HDI) and why is it important?
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Abriefoverviewofpropertiesandreactions © The Author(s) 2022 …
https://journals.sagepub.com/doi/pdf/10.1177/07482337221090709
WebDiisocyanates are monomers used to make polyure-thane (PU) polymers and are characterized by having two NCO groups as their key reactive sites. They are distinguished from mono-isocyanates, like methyl isocyanate, which is used industrially as an acylating agent, by having very different physical properties and toxicological pro les. fi.
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