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    • 1. 发明公开
    • 폴리이소시아네이트 조성물 및 그 폴리이소시아네이트조성물로부터 저습윤 노화 압축 영구 변형된 저밀도 연질포옴을 제조하는 방법
    • 聚异氰酸酯组合物
    • KR1020020045568A
    • 2002-06-19
    • KR1020010077003
    • 2001-12-06
    • 바이엘 코포레이션
    • 베르너,요아힘지버르트,로날드
    • C08G18/06
    • C08G18/6688C08G18/10C08G18/4072C08G18/632C08G2101/0008C08G2101/0058C08G2101/0083C08G18/7664
    • PURPOSE: A polyisocyanate composition is provided to prepare flexible foams which exhibit improved compression set and humid aged compression set properties, and improved tear strengths, while maintaining sufficiently high hardness. CONSTITUTION: The polyisocyanate composition comprises (1) from about 70 to 99% by weight, based on 100% by weight of components(1,2) of a polymethylene poly(phenyl-isocyanate) having an NCO group content of from about 30 to about 33% and a monomer content of from about 40% to about 90%. The monomer comprises less than about 8% by weight of 2,2'-diphenylmethane diisocyanate, from about 10 to about 50% by weight of 2,4'-diphenylmethane diisocyanate, and from about 50 to about 90% by weight of 4,4'-diphenylmethane diisocyanate, wherein the weight % of the 2,2'-, 2,4'- and 4,4'-isomer of diphenylmethane diisocyanate is totally 100% by weight of the monomer content. The composition further includes from about 1 to about 30% by weight, based on 100% by weight of a prepolymer of diphenylmethane diisocyanate having an NCO group content of from about 2% to about 20%.
    • 目的:提供多异氰酸酯组合物以制备柔性泡沫,其具有改进的压缩变形和湿润老化的压缩变形特性,并且改善撕裂强度,同时保持足够高的硬度。 构成:多异氰酸酯组合物包含(1)约70至99重量%,基于100重量%的组分(1,2),其具有NCO基团含量为约30至30重量%的聚亚甲基聚(苯基 - 异氰酸酯) 约33%,单体含量为约40%至约90%。 单体包含小于约8重量%的2,2'-二苯基甲烷二异氰酸酯,约10至约50重量%的2,4'-二苯基甲烷二异氰酸酯和约50至约90重量%的4, 4'-二苯基甲烷二异氰酸酯,其中二苯基甲烷二异氰酸酯的2,2',2,4'-和4,4'-异构体的重量%为单体含量的100重量%。 基于100重量%的NCO基团含量为约2%至约20%的二苯基甲烷二异氰酸酯的预聚物,组合物还包括约1至约30重量%。