Process for preparation of polyurethanes utilizing novel catalys

Details Process for preparation of polyurethanes utilizing novel catalys Process for preparation of polyurethanes utilizing novel catalys

1995-04-07

1996-02-13

Seidleck, James J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

4273855, 4273899, 521127, 521128, 521129, 521155, 521163, 521170, 521172, 521174, 521901, 521902, 528 52, 528 53, 528 54, 528 58, 528 68, 528 76, 528 80, 528 83, 528 85, C08G 1824, C08J 904, B05D 726

Patent

active

054911745

ABSTRACT:
Novel catalyst compositions comprising complexes of tin(IV) salts and amine compounds are used to prepare polyurethanes, polyureas, polycarbodiimides and polyisocyanurates. The complexes, which preferably employ primary amines, allow delay of gelation until they dissociate under certain reaction conditions. The complexes can be prepared neat or in situ in an active hydrogen containing formulation component. The complexes serve to delay gelation of the formulation because they can be prepared to be relatively stable to moisture and will predictably dissociate upon heating, either as a result of the exothermic nature of the reaction being catalyzed or with application of an external heat source. The catalyst compositions are particularly useful for preparation of carpet underlay and in other applications requiring significant delay prior to gelation.

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