NOVEL CATALYSTS FOR PREPARATION OF POLYURETHANES

• Main Authors: NEILL, PAUL LEE, MOBLEY, LARRY WAYNE, SKAGGS, KENNETH WAYNE, TURNER, ROBERT BURTON, GRIER, LAURA ANN, PRIESTER, RALPH DAWSON
• Format: Patent
• Language: English; French
• Published: 28.04.1994
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Novel catalyst compositions comprising complexes of tin (IV) salts and amine compounds are used to prepare polyure- thanes, polyureas, polycarbodiimides and polyisocyanurates. The complexes, w hich 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 gela tion of the formulation because they are relative- ly stable to moisture and will predictably dissociate upon heating, either a s a result of the exothermic nature of the reaction bein g catalyzed or with application of an external heat source. The catalyst compo sitions are particularly useful for preparation of car- pet underlay and in other applications requiring significant delay prior to gelation. 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 are 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.