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    • 10. 发明授权
    • Polymeric thickener for molding compounds
    • 聚合增稠剂用于模塑料
    • US07829637B2
    • 2010-11-09
    • US12560958
    • 2009-09-16
    • Probir K. GuhaMichael J. SiwajekBrian A. Beach
    • Probir K. GuhaMichael J. SiwajekBrian A. Beach
    • C08G63/00
    • C08F283/00C08F283/006C08F290/14C08F290/147C08G18/10C08G18/5024C08G2270/00C08J3/246C08J5/24C08J2367/06C08J2375/02C08L51/08C08G18/50C08L2666/02
    • A molding composition is provided that includes a thermoset cross-linkable polymeric resin, a fibrous filler and a thickener system. The thickener system includes an amine and an isocyanate that are reactive to form a polyurea. The polyurea is operative to thicken the molding composition formulation prior to polymeric resin thermoset with superior properties relative to conventional thickener systems. A molded article produced from a cross-linked thermoset polymeric resin containing fibrous filler and a polyurea present from 1 to 5 total weight percent of the article either forms an interpenetrating network between the resin and the polyurea or the resin and polyurea crosslink upon resin thermoset to further strengthen the resulting article. An alkali earth oxide or hydroxide simultaneously thickens through interaction with carboxylate functionality of the cross-linkable resin to provide a superior viscosity build and humidity tolerance.
    • 提供了一种模制组合物,其包括热固性交联聚合物树脂,纤维填料和增稠剂体系。 增稠剂体系包括胺和异氰酸酯,其可形成聚脲反应。 在聚合树脂热固性材料之前,聚脲可以使模制组合物配方变厚,相对于常规的增稠剂体系具有优异的性能。 由含有纤维填料的交联热固性聚合物树脂和存在于制品1至5总重量百分数的聚脲制成的模塑制品在树脂与聚脲或树脂之间形成互穿网络,并且在树脂热固化时交联聚脲 进一步加强后果。 通过与可交联树脂的羧酸官能团的相互作用,碱土金属氧化物或氢氧化物同时增稠,以提供优异的粘度和耐湿性。