Method for producing cold polyurethane foams

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

1995-12-07

1997-05-27

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521110, 521126, C08G 1824, C08G 1861

Patent

active

056332920

ABSTRACT:
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 ##STR1## being used as stabilizers, in which R.sup.1 is the same or different in the average molecule and represents a methyl group or a group of the general formula --CH.sub.2 --CH.sub.2 --(CH.sub.2).sub.a --C.sub.6 H.sub.3 (R.sup.2).sub.2 (a=0 or 1; R.sup.2 =--O--CH.sub.3), with the proviso that at least one R.sup.1 group is a group having the formula --CH.sub.2 --CH.sub.2 --(CH.sub.2)a--C.sub.6 H.sub.3 (R.sup.2).sub.2

REFERENCES:
patent: 3741917 (1973-06-01), Morehouse
patent: 3952038 (1976-04-01), Prokai
patent: 4031044 (1977-06-01), Joslyn
patent: 4039490 (1977-08-01), Kanner
patent: 4067828 (1978-01-01), Kanner et al.
patent: 4110272 (1978-08-01), Kanner et al.

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