The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 1997
Filed:
Dec. 07, 1995
Th. Goldschmidt AG., Essen, DE;
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