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    • 65. 发明授权
    • Nylon molding compositions exhibiting improved protection against
UV-light degradation
    • 显示改进的防止UV光降解的尼龙模塑组合物
    • US5380774A
    • 1995-01-10
    • US441959
    • 1989-11-28
    • Bruce M. Mulholland
    • Bruce M. Mulholland
    • C08K5/13C08K5/134C08K5/17C08K5/3435C08K5/3475C08K5/524C08K5/527C08L77/00C08K5/11
    • C08K5/3435C08K5/1345C08K5/527
    • Nylon molding compositions, and molded parts formed of the same, include a UV-light stabilization system having between about 0.5 to about 1.0 wt. % of a hindered phenolic antioxidant, between about 0.05 to about 1.5 wt. % of a phosphite compound, between about 0.05 to about 1.5 wt. % of a hindered amine light stabilizer, and optionally, between about 0.05 to about 5.0 wt. % of a benzotriazole UV absorber. The nylon molding compositions and molded parts formed thereof exhibit improved color difference, as calculated in CIELab units under illuminant "D-65" according to ASTM Standard D-2244, of less than about 1.5 when exposed to 601.6 kJ/m.sup.2 irradiation in a Xenon arc weatherometer operated according to SAE J1885, and improved surface gloss retention characteristics after such irradiation.
    • 尼龙模制组合物和由其形成的模塑部件包括UV-光稳定系统,其具有约0.5至约1.0重量% 受阻酚抗氧化剂的%,约0.05至约1.5重量% %的亚磷酸酯化合物,约0.05至约1.5重量% %的受阻胺光稳定剂,以及任选的约0.05至约5.0重量% %的苯并三唑UV吸收剂。 尼龙成型组合物和由其形成的模塑部件显示出改进的色差,如在CIEab单元中根据ASTM标准D-2244的发光体“D-65”计算,在暴露于氙中的601.6kJ / m 2照射时小于约1.5 弧焊老化器根据SAE J1885操作,并且在这种照射之后改善了表面光泽保持特性。
    • 69. 发明授权
    • Polypropylene resin compositions
    • 聚丙烯树脂组合物
    • US5328950A
    • 1994-07-12
    • US24858
    • 1993-02-26
    • Sachio YokoteYoichi KawaiMasaki Misumi
    • Sachio YokoteYoichi KawaiMasaki Misumi
    • C08K3/22C08K5/52C08K5/527C08L23/10
    • C08K3/22C08K5/527
    • A polypropylene resin composition which is excellent in transparency and which shows very low pH reduction of the extract obtained in a promoted hot water-extraction test of a polypropylene resin which has been irradiated with radiant rays for sterilization. The polypropylene resin composition comprises 100 parts by weight of a polypropylene resin, 0.01 to 1.0 part by weight of a metal diarylphosphate represented by the following general formula (I): ##STR1## (wherein R.sub.1 and R.sub.2 each represents a hydrogen atom or an alkyl group; M represents an alkali metal or an alkaline earth metal; n is an integer of 1 or 2; and A represents an alkylidene group); and 0,001 to 1.0 part by weight of a hydroxide of an alkali metal, an alkaline earth metal or an element of the aluminum group. The polypropylene resin composition is suitable for use in making medical instruments, containers for foods or the like.
    • 一种聚丙烯树脂组合物,其透明度优异,并且在用辐射线照射灭菌的聚丙烯树脂的促进热水提取试验中获得的提取物的pH降低非常低。 聚丙烯树脂组合物包含100重量份的聚丙烯树脂,0.01-1.0重量份由以下通式(I)表示的金属二芳基磷酸酯:其中R 1和R 2各自表示氢原子或烷基 基团; M表示碱金属或碱土金属; n为1或2的整数; A表示亚烷基); 和0.001-1.0重量份的碱金属,碱土金属或铝基元素的氢氧化物。 聚丙烯树脂组合物适用于制造医疗器械,食品容器等。