Method for producing cold polyurethane foams

Details Method for producing cold polyurethane foams Method for producing cold polyurethane foams

C - Chemistry, Metallurgy

08

L

C08L 75/04 (2006.01) C08J 9/00 (2006.01) C08K 5/54 (2006.01) C08L 83/04 (2006.01)

Patent

CA 2164889

The invention relates to a method for the production of high resilience polyurethane foams by reacting a mixture of highly reactive polyols, which usually have an average molecular weight of between about 4800 and 6500 g/mole and at least 70% primary hydroxyl groups and optionally contain fillers, polyfunctional isocyanates, amine activators, cross-linking agents, tin catalysts, blowing agents and stabilizers, compounds of the general formula Image being used as stabilizers, in which R1 is the same or different in the average molecule and represents a methyl group or a group of the general formula -CH2-CH2-(CH2)a-C6H3(R2)2 (a = 0 or 1; R2 = -O- CH3), with the proviso that at least one R1 group is a group having the formula -CH2-CH2-(CH2)a-C6H3(R2)2 n has an average numerical value of 2 to 11, m has an average numerical value of 1 to 6, with the proviso that the quotient p = (n + m + 2)/m is 1.66 to 12.

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