A foamable polyurethane resin composition includes a polyisocyanate material, a polyol material, water, and a catalyst. The polyisocyanate material contains 1,4-H.sub.6XDI; the polyol material contains crystalline PTMEG and noncrystalline PTMEG and/or PPG; the total amount of the crystalline PTMEG, the noncrystalline PTMEG, and PPG is 90% by mass or more with respect to the total amount of the polyol material; and a ratio of the crystalline PTMEG is 60% by mass or more and 90% by mass or less with respect to the total amount of the crystalline PTMEG, the noncrystalline PTMEG, and PPG.

Polyurethane foams are made by curing a reaction mixture that contains an aromatic polyisocyanate, at least one isocyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, at least one cyclic 1,3-diketone compound, at least one aminoalcohol or alkylhydroxylamine and an alkali metal, phosphonium or ammonium sulfite. Foams so produced emit low levels of formaldehyde, acetaldehyde, acrolein and propionaldehyde.

Polyurethane foams are made by curing a reaction mixture that contains an aromatic polyisocyanate, at least one isocyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, a polyethyleneamine mixture having a number average molecular weight of 175 to 450 and an alkali metal, phosphonium or ammonium sulfite. Foams so produced emit low levels of formaldehyde, acetaldehyde, acrolein and propionaldehyde.

An elastomeric composite polyurethane skin having an average flexural modulus, measured in accordance with ASTM D790-03, smaller than 35 MPa is disclosed. The elastomeric composite polyurethane skin includes a first aliphatic polyurethane layer made from a first polyurethane reaction mixture having at least one isocyanate compound with at least two NCO-groups which are not directly attached to an aromatic group, at least one isocyanate-reactive component (B1), and at least one catalyst component (C1) substantially free of lead, and a second aromatic polyurethane layer made from a second polyurethane reaction mixture having at least one aromatic isocyanate compound (A2), and at least one isocyanate-reactive component (B2).

An embodiment includes a polymer composition comprising a thermoplastic polymer that: (a) is bonded to iodine, (b) includes a vinyl group, and (c) includes urethane linkages. Other embodiments are described herein.

Disclosed is an organic amine salt foaming agent, that is, a composite polyurethane foaming agent, comprising: 1) hexafluorobutene; and 2) an alkanolamine salt mixture (MAA), the alkanolamine salt mixture (MAA) contains an organic amine salt compound having the following general formula (I): A.sup.n−[B.sup.m+].sub.p (I); wherein A.sup.n− is one or two or three selected from the following anions: (b) carbonate: CO.sub.3.sup.2−; (c) formate: HCOO.sup.−; (d) bicarbonate: HO—COO.sup.−. A polyurethane foaming method using carbon dioxide and an organic amine in combination is also disclosed, in which carbon dioxide is added to a polyurethane composition for foaming. A method for preparing an alkanolamine carbonate salt with low water content from ammonium carbonate and an epoxide is additionally disclosed, in which a liquid alkanolamine salt mixture is used as a dispersion medium or as a solvent for reaction raw material.

Provided is a material having an excellent sound-absorbing performance which can be easily applied to the desired area at the operation site and which can effectively prevent sound leakage. The material includes an open-cell soft polyurethane foam prepared from a 2-part reactive urethane resin composition prepared from a polyisocyanate component and a polyol-containing component, wherein the polyol-containing component comprises a polyol component, catalysts, a foam stabilizer, an amine compound having primary or secondary amino groups, and carbon dioxide; wherein an average sound absorption coefficient of said polyurethane foam is 30% or more, measured in accordance with JIS A 1405-2:2007 for 63 hertz to 5000 hertz; and the length of liquid-dripping is within 300 mm.

The present invention relates to a two-component coating system comprising a first component and a second component each of which is separate and distinct from each other, wherein the first component comprises a carboxylic acid functional polymer dissolved and/or dispersed in an aqueous medium, and the second component comprises a multi-aziridine compound having: a) from 2 to 6 of the following structural units (A): b) whereby m is an integer from 1 to 8; and o R′ and R″ are both H b) one or more linking chains wherein each one of these linking chains links two of the structural units A; c) one or more connecting groups whereby each one of the connecting groups connects two of the structural units A; and d) a molecular weight in the range from 840 Daltons to 5000 Daltons, wherein the molecular weight is measured using MALDI-TOF mass spectrometry.

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A method for producing a polyurethane polymer comprises the steps of: (a) providing a polyol; (b) providing an additive composition comprising a polyethylenimine compound and a sulfite compound; (c) combining the polyol and the additive composition to produce a polyol composition; (d) providing an isocyanate compound; and (e) combining and reacting the polyol composition and the isocyanate composition to produce a polyurethane polymer.

The present invention relates to curable compositions comprising (a) N-arylated benzoxazines, and (b) a prepolymer produced from a diisocyanate having two isocyanate groups with different reactivity. The compositions are particularly suitable in the production of adhesives and sealants, prepregs and towpreg.