Delayed action/enhanced curing catalysis in polyurethane systems
Patent 4582861 Issued on April 15, 1986. Estimated Expiration Date: 
November 13, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 13, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3010963 3050477 3087912 3476933 3824199 3892687 Cyclic quaternary hydroxyalkyl phenoxide catalysts for isocyanate reactions Catalysis of organic isocyanate reactions Quaternary hydroxyalkyl tertiary amine bases as polyurethane catalysts Metallic quaternary ammonium carboxylates as polyisocyanurate catalysts InventorsAssigneeApplicationNo. 06/670705 filed on 11/13/1984US Classes:521/118, -C-XH ingredient contains a nitrogen atom252/183.12, With stabilizer or inhibitor502/164, Quaternary ammonium or phosphonium521/902, CELLULAR POLYMER CONTAINING AN ISOCYANURATE STRUCTURE528/49, Material contains only one -C-XH,-C-C(=X)-XH or carbon to -NH or HNH group528/52Material is organic nitrogen-containing compoudExaminersPrimary: Cockeram, Herbert S.Attorney, Agent or FirmInternational ClassesC08G 18/20 (20060101)C08G 18/18 (20060101) C08G 18/00 (20060101) AbstractA method for preparing polyurethane product by the reaction of an organic polyisocyanate with a polyester or polyether polyol in the presence of a catalytically effective amount of a catalyst system consisting essentially of a tertiary amine and 1 to 35 wt %, based on the tertiary amine, of an N-hydroxyalkyl quaternary ammonium carbonylate salt. The use of such catalyst system advantageously improves the cure time of the urethane reaction, when compared to a system containing solely a tertiary amine, while maintaining the same initiation of the reaction. This advantage can be transferred to a delay in the initiation time while maintaining or shortening the cure time by adjustments in the total amount of the catalyst system used. |
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