Polymeric isocyanate pure monomeric 4,4'-methylene diphenyl isocyanate (MDI) (CAS number 101–68–8, EC number 615–005–00–9), at temperatures up to 38 °C a whitish-yellow solid which is used in the industrial production of special plastics, varnish and glue components, moulding elastomers and "MDI prepolymers Jul 26, 2023 · The most widely used aromatic diisocyanates are toluene diisocyanate (TDI) and methylene diphenyl diisocyanate (MDI). In the case of diisocyanates, the reactivity of the isocyanate (−N=C=O, or NCO) functional group toward water and biological (macro)molecules and the resulting reaction products are key. (EPA List of Lists, 2024) Methylene diphenyl diisocyanate (MDI) is an aromatic diisocyanate. The following fact sheets cover isocyanate compounds. Synthesis of polyurethane from a diisocyanate and a diol Isocyanates are compounds containing the isocyanate group (-NCO). TDI is used to make flexible polyurethane foam for furniture, bedding, carpet underlay and other products. The product has a narrow molecular weight distribution and a high reactivity. 02 PPM, ceiling Polymeric Isocyanates Polymeric MDI is polymethylene polyphenylisocyanate, and is derived from the classic chemical reaction of carbonyl-chloride with aniline-formaldehyde condensate. Monomeric and polymeric isocyanate products have been used in industry for over 50 years. Jul 15, 2021 · Since that time there has been an effort to get away from using isocyanates for polyurethanes. The main application areas are in the automotive, transpor- Chemical Family: Polymeric Isocyanate Chemical Name: Polymeric Diphenylmethane 4,4 Diisocyanate Synonyms: MDI, ISO, “A” Component CAS Number: See Below TSCA Status: On Inventory II. 1. g. 02 PPM, ceiling Jun 6, 2024 · In this research, an oxidized starch/styrene–butadiene rubber system with high capability of absorbing electromagnetic energy was adopted as the main component, the effect of oxidized starch content on the bonding and mechanical properties of aqueous polymer isocyanate (API) after high-frequency curing was evaluated, and the effect mechanisms were explored by combining thermodynamic tests Jun 11, 2018 · Knowledge of the mechanical behaviors of polymer film in humid environments is of great significance for predicting the long-term performance of emulsion polymer isocyanate (EPI) as a high-performance wood adhesive. Jan 1, 2017 · Analysis to determine the hydroxyl value (e. Baur, X. 13 In this case, a (typically oligomeric) difunctional alcohol is reacted with a slight molar excess of monomeric 1. The most common forms of isocyanates are toluene diisocyanate (TDI), methylene diphenyl diisocyanate (MDI), and hexamethylene diisocyanate (HDI). • Toluene diisocyanate (TDI) • Diphenylmethane diisocyanate (MDI) aromatic isocyanates and their derivatives as well as polyurethane dispersions. Polyurethanes are some of the Polymeric diphenylmethane diisocyanate: 9016-87-9: 313# 313# indicates that this is a member of the EPCRA Section 313 Diisocyanate category. Aeronautical / Automotive / Building and Construction / Coatings / Food contact / Furniture / Industrial sector / Marine / Mass Transports / Technologies . Polyisocyanates such as triisocyanates derived as TDI, HDI, IPDI adducts with trimethylolpropane (TMP), dimerized isocyanates termed as uretdiones, polymeric MDI, blocked isocyanates (where alcohols, phenols, oximes, lactams, hydroxylamines are blocking agents) are also used in PU production. The term polyurethane applies to a large number of polymers formed through the polyaddition of polyfunctional isocyanates and isocyanate-reactive polyfunctional compounds. Application areas . Hazardous Ingredients * Components: Approx. Isophorone Diisocyanate. Sep 30, 2024 · What are Isocyanates? Isocyanates are a class of compounds that contain the -N=C=O group within their molecules. Most global applications conventionally use polymeric May 8, 2022 · The potential effects of exposure to a substance, in contrast, are a direct consequence of the chemical reactivity of that substance. Three isomers are common, varying by the positions of the isocyanate groups around the rings: 2,2′-MDI, 2,4′-MDI, and 4,4′-MDI. Products include monomeric and polymeric methylene diphenyl isocyanate (MDI), toluene diisocyanate (TDI), modified MDI, and MDI prepolymers. Poly"methylene phenyl isocyanate" "crude MDI, polymeric MDI", in primary forms; Examples: - Poly(methylene phenyl isocyanate) with a purity of 98% (20 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 Deutsch English Français of isocyanate products is through product safety literature. Methyl Isocyanate. Process chemists should also make allowances for other active ISOCYANATE A-2732 ISOCYANATE A-2732 MATERIAL SAFETY DATA SHEET SECTION 1: PRODUCT AND COMPANY IDENTIFICATION MANUFACTURER GENYK Inc. % Current TLV/PEL 4,4- Diphenylmethane Diisocyanate Cas# 101-68-8 30 - 50 . See Polymeric isocyanate. Diphenylmethane diisocyanate (MDI) and toluene diisocyanate (TDI) sold under the Lupranate® name. Isocyanates, both in monomeric and in polymeric forms, are extensively used for manufacturing polyurethane foams, paints, adhesives, and a number of other products. Diphenylmethane diisocyanate (MDI) is a member of the diisocyanate family associated with polyurethane chemistry. Toluene-2,4-Diisocyanate. 100% NVM / Urethane / Production site. Together, they comprise over 90% of the overall diisocyanate consumption in the North American polyurethane industry, with aliphatic diisocyanates accounting for the balance. (February 1996). (April 1996). Polymeric isocyanates - [AMINES - AMINES,AROMATIC - METHYLENEDIANILINE] (Vol 2) Rigid foams are based primarily on polyfunctional, low molecular weight alcohols and amines. 4. International Chemical Safety Cards Jul 31, 2021 · Water-based polymeric isocyanate adhesives are widely used in glued laminated timbers, laminated wood and plywood manufacturing. 1701, 3rd Avenue, Shawinigan, QC, G9T2W6 Phone: 819-729-0395 / Fax: 819-729-0383 PRODUCT Trade Name: ISOCYANATE A-2732 Chemical Name: Polymeric isocyanate Chemical family: Isocyanate There are two primary aromatic diisocyanates: toluene diisocyanate (TDI) and methylenediphenyl diisocyanate (MDI). They react with compounds containing alcohol (hydroxyl) groups to produce polyurethane polymers, which are components of polyurethane foams, thermoplastic elastomers, spandex fibers, and polyurethane paints. Isocyanates are extremely hazardous. ‘Polymeric MDI’ The principal material of commerce is not pure 4,4′-methylenediphenyl diisocyanate but is a mixture containing 4,4′-methylenediphenyl diisocyanate, other methylenediphenyl diisocyanate isomers, and low oligomers of the general structure shown above. (June 1998). Toluene-2,6-Diisocyanate. carbodiimide-modified MDI) and prepolymers in the industry. (April 1997). [3] This isomer is also known as Pure MDI. 3-Chloro-4-Methyl Phenyl Isocyanate. If a diisocyanate is treated with a compound containing two or more hydroxyl groups, such as a diol or a polyol, polymer chains are formed, which are known as polyurethanes. TDI is used primarily in the production of flexible foams. MDI is primarily used to make rigid polyurethane foams used as insulation for homes. The health hazards posed by the presence of isocyanates at workplaces, chiefly respiratory tract diseases, have become a source of major concern for occupational health officials. A tri-copolymer latex was cross-linked by the general polymeric methylene diisocyanate (p-MDI) and aqueous emulsified isocyanate (EMDI) at different loadings for preparing EPI . Polymeric aliphatic isocyanate; excellent flow, good overall performance. That is, the more isocyanate that is added, the higher the rupture stress of the cured film in humid conditions. Lupranat® isocyanates from BASF are utilized across a large range of applications and industries. Chemical Family: Polymeric Isocyanate Chemical Name: Polymeric Diphenylmethane 4,4 Diisocyanate Synonyms: MDI, ISO, “A” Component CAS Number: See Below TSCA Status: On Inventory II. When the carbon (C) between the nitrogen (N) and oxygen (O) bonds with the hydroxyl group (-OH) of alcohols, it forms polyurethane. These adhesives are composed of a water-based polymer bearing hydroxyl groups and polymeric isocyanates cross-linker . Ennis Isocyanates are used to make polyurethane, a synthetic material that has many commercial and industrial uses. : Hypersensitivity pneumonitis (extrinsic allergic alveolitis) induced by isocyanates. Water-based polymeric isocyanate adhesives have shown excellent bond performance for decades. Methylene Bisphenyl Isocyanate. (January 1986). In the first method, shown in Scheme 2a, the trimerization reaction is introduced as an intended side-reaction during polyurethanization. The quest Marc Hirsch explains the chemistry behind how polyisocyanates and polyols react to form polyurethanes with excellent durability. Monomeric MDI (M, MI), polymeric MDI (M20, M70), TDI (T80) and one of the broadest portfolio of blends, isocyanates derivatives (e. Furthermore, it was found that the moisture resistance of EPI film is strongly dependent upon the cross-linker content. The 4,4′ isomer is most widely used, and is also known as 4,4′-diphenylmethane diisocyanate. All the diisocyanate monomers listed below can be used to make various types of polyisocyanate products. Feb 28, 2019 · Currently, there are two methods that are commonly adopted to prepare polyurethane networks on the basis of isocyanate (NCO) trimerization. , based on OH, H 2 O content) of a polyol blend of a one-pack urethane formulation, adjusted to for reactive amines present, allows the quantity of an isocyanate (of known NCO content) necessary to produce a full polymer to be calculated. MDI, the second type of aromatic diisocyanate, comes in two forms: Pure MDI and polymeric MDI (PMDI). MDI, the second type of DII, comes in two forms: pure MDI and polymeric MDI (PMDI). Our raw materials are used for coatings, adhesives, sealants and specialty prod-ucts, such as elastomers, high-quality films, 3D printing products, cosmetics, textiles and medical products. Jun 11, 2018 · As anticipated, polymeric isocyanate is helpful in alleviating plasticization. 4,4'-Methylene diphenyl isocyanate is produced in two grades of purity (Schauerte 1983): . Apr 19, 2021 · US EPA Integrated Risk Information System: Methylene Diphenyl Diisocyanate (monomeric MDI) and polymeric MDI (PMDI) (CASRN 101-68-8, 9016-87-9). fklgvu wzcp mupcg ibyo zbebz vtx jjqo nklxsln iqetqes coqk