Process for producing molded polyurethane parts

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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2643281, 2643286, 2643288, 524719, 524720, 524722, 524731, 524773, 524778, 528 27, 528 28, 528 48, 528 53, 528 57, C08G 1830

Patent

active

047286903

ABSTRACT:
Process for producing molded polyurethane parts using as internal release agents, compounds of the general formula ##STR1## in amounts of 0.5 to 10 weight percent, based on the reaction formulation, in which at least one R.sup.2 radical in the average molecule represents ##STR2## R.sup.3 is a divalent hydrocarbon radical with 2 to 4 carbon atoms and R.sup.4, R.sup.5 are univalent hydrocarbon radicals or together are part of a morpholine or a piperazine ring. The molded polyurethane parts can be removed from the mold using significantly lower tensional forces without residues being built up on the mold.

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