Novel catalysts for preparation of polyurethanes

Details Novel catalysts for preparation of polyurethanes Novel catalysts for preparation of polyurethanes

C - Chemistry, Metallurgy

08

G

C08G 18/24 (2006.01)

Patent

CA 2173603

Novel catalyst compositions comprising complexes of tin (IV) salts and amine compounds are used to prepare polyure- thanes, polyureas, polycarbodiimides and polyisocyanurates. The complexes, which preferably employ primary amines, allow de- lay 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 are relative- ly 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 car- pet underlay and in other applications requiring significant delay prior to gelation.

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