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AssigneeAlliedSignal Inc.
InventorsRobert Christian Parker, Timothy Rech Demmin
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The present invention relates to foam compositions which are expanded with hydrohalocarbon blowing agents in the presence of catalysts which result in a decreased amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during the polymerization. Thus, the present invention provides compositions comprising polyisocyanate, polyol, hydrohalocarbon blowing agent, surfactant, and at least one catalyst for polymerization of the polyisocyanate and polyol wherein the catalyst is less volatile than N,N-dimethylcyclohexylamine or the catalyst is a tertiary amine having at least one isocyanate-reactive functionality selected from the group consisting of --OH and --NH-- and the catalyst results in a decreased amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during polymerization of the polyisocyanate and the polyol and especially during use of the foam samples at a temperature of at least about 54.degree. C.
A composition comprising polyisocyanate, polyol, hydrofluorocarbon blowing agent, surfactant, and at least one catalyst for polymerization of said polyisocyanate and said polyol wherein said catalyst is a polyamine of the formula R.sup.16 R.sup.17 N--R.sup.18 --N(R.sup.19)--R.sup.18 --NR.sup.16 R.sup.17 wherein R.sup.16, R.sup.17, and R.sup.19 are the same or different and selected from hydrogen or straight chain and branched alkyl having 1 to 18 carbon atoms;
A composition comprising polyisocyanate, polyol, hydrofluorocarbon blowing agent, surfactant, and at least one catalyst for polymerization of said polyisocyanate and said polyol wherein said catalyst is of the formula 2,4,6-tris(N,N-dialkylaminomethylphenol) wherein said alkyl is selected from hydrogen or alkyl having 1 to 18 carbon atoms and said catalyst results in a decreased amount of decomposition of said hydrofluorocarbon blowing agent to haloalkenes.
A composition comprising polyisocyanate, polyol, hydrofluorocarbon blowing agent, surfactant, and at least one catalyst for polymerization of said polyisocyanate and said polyol wherein said catalyst is a hydroxyalkylamine and said catalyst results in a decreased amount of decomposition of said hydrofluorocarbon blowing agent to haloalkenes.
A composition comprising polyisocyanate, polyol, hydrofluorocarbon blowing agent, surfactant, and at least one catalyst for polymerization of said polyisocyanate and said polyol wherein said catalyst is pentamethyldiethylene triamine;
A polyurethane composition comprising polyisocyanate, polyol, hydrofluorocarbon blowing agent, surfactant, and at least one polyamine catalyst of the formula 2,4,6-tris(N,N-dialkylaminomethylphenol) wherein alkyl is selected from hydrogen or alkyl having 1 to 18 carbon atoms for polymerization of said polyisocyanate and said polyol wherein said polyamine catalyst results in a decreased amount of decomposition of said hydrofluorocarbon blowing agent to haloalkenes.
A process for preparing polyurethane foam comprising the step of:
Dependencies are inferred from the claim text.