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    • 9. 发明授权
    • Color stabilized polyoxymethylene molding compositions
    • 颜色稳定的聚甲醛成型组合物
    • US5096951A
    • 1992-03-17
    • US626789
    • 1990-12-13
    • Andrew Auerbach
    • Andrew Auerbach
    • C08K3/00C08J5/00C08K5/09C08K5/098C08K5/16C08K5/3475C08K5/3492C08K5/524C08K5/526C08L59/00C08L61/04
    • C08K5/3492C08K5/098C08K5/526
    • A polyoxymethylene molding composition which exhibits improved ambient and heat aged color stability includes a metal deactivator and calcium hydroxystearate. One preferred composition of the invention includes: (a) greater than about 95 weight percent of polyoxymethylene, (b) between about 0.01 to about 0.1 weight percent of 3 salicyloyl-amido-1,2,4 triazole or tris-2-tert.butyl- 4-thio-(2'methyl-4'hydroxy-5'tert.butyl) phenyl-5-methyl phenyl phosphite, (c) between about 0.015 to about 0.4 weight percent of 2,4,6-triamino-sym-triazine, (d) between about 0.25 to about 1.0 weight percent of tetrakis(methylene-(3,5-di-tert-butyl- 4-hydroxyhydrocinnamate)) methane, (e) between about 0.05 to about 0.2 weight percent of calcium 12-hydroxystearate, and (f) between about 0.1 to about 0.3 weight percent of N-N'-ethylenebisstearamide. Due to their enhanced color stability, the compositions of this invention find particular utility as molded automobile components.
    • 表现出改善的环境和热老化颜色稳定性的聚甲醛模塑组合物包括金属钝化剂和羟基硬脂酸钙。 本发明的一种优选组合物包括:(a)大于约95重量%的聚甲醛,(b)约0.01至约0.1重量%的磺酰基酰胺基-1,2,4-三唑或三-2-叔丁醇。 丁基-4-硫代 - (2'-甲基-4'-羟基-5'-叔丁基)苯基-5-甲基苯基亚磷酸酯,(c)约0.015至约0.4重量%的2,4,6-三氨基对 - 三嗪,(d)约0.25至约1.0重量%的四(亚甲基 - (3,5-二叔丁基-4-羟基氢化肉桂酸酯))甲烷,(e)约0.05至约0.2重量%的钙 12-羟基硬脂酸酯,和(f)约0.1至约0.3重量%的N-N'-亚乙基双硬脂酰胺。 由于其颜色稳定性的提高,本发明的组合物特别用作模制汽车部件。