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    • 10. 发明授权
    • Stabilization of polycarbonates having high heat distortion temperatures
    • 具有高热变形温度的聚碳酸酯的稳定化
    • US5668204A
    • 1997-09-16
    • US853670
    • 1992-03-19
    • Helmut-Martin MeierUwe WesteppeRolf DheinDieter FreitagDieter Constant
    • Helmut-Martin MeierUwe WesteppeRolf DheinDieter FreitagDieter Constant
    • C08K3/00C08K5/541C08K5/5419C08K5/549C08L69/00C08J5/10C08K5/54
    • C08K5/541C08K5/549C08L69/00
    • A thermoplastic molding composition containing an aromatic polycarbonate and a particular siloxane compound is disclosed. The composition which is based on a polycarbonate resin having bifunctional structural units corresponding to formula (Ia) ##STR1## wherein R.sup.1 and R.sup.2 denote, independently of one another, hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 -cycloalkyl, C.sub.6 -C.sub.10 -aryl, or C.sub.7 -C.sub.12 -aralkyl,m is an integer from 4 to 7,R.sup.3 and R.sup.4 selected individually for each X, denote, independently of one another, hydrogen or C.sub.1 -C.sub.6 -alkyl, andX stands for carbon,under the condition that R.sup.3 and R.sup.4 are both alkyl groups on at least one X atom, andcontains from 0.001 to 1% by weight of at least one siloxane corresponding to formula (II) ##STR2## wherein R denotes hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.6 -C.sub.10 -aryl or C.sub.1 -C.sub.10 -alkoxy,B denotes R or A,r, s and t independently denote an integer from 0 to 200, or to formula (III) ##STR3## wherein R has the same meaning as in formula (II)u denotes an integer from 1 to 20, and v and w denote an integer from 0 to 20,and wherein the sum u+v+w is greater than 3, andA denotes a C.sub.1 -C.sub.20 -alkyl group or a C.sub.6 -C.sub.10 -aryl group is characterized in its improved heat distortion temperature and good aging properties.
    • 公开了一种含有芳族聚碳酸酯和特定的硅氧烷化合物的热塑性模塑组合物。 基于具有对应于式(Ia)的双功能结构单元的聚碳酸酯树脂的组合物(Ia)其中R 1和R 2彼此独立地表示氢,卤素,C 1 -C 8烷基,C 5 -C 6 - 环烷基 ,C 6 -C 10 - 芳基或C 7 -C 12 - 芳烷基,m是4至7的整数,每个X分别选择的R 3和R 4彼此独立地表示氢或C 1 -C 6烷基,X表示 对于碳,在R3和R4均为至少一个X原子上的烷基的情况下,并且含有0.001至1重量%的至少一种对应于式(II)的硅氧烷(II),其中R表示 氢,C 1 -C 20 - 烷基,C 6 -C 10 - 芳基或C 1 -C 10 - 烷氧基,B表示R或A,r,s和t独立地表示0至200的整数,或式(III) III)其中R具有与式(II)中相同的含义,u表示1至20的整数,v和w表示0至20的整数,其中和u + v + w大于3,并且 A表示C1-C 20烷基或C6-C10-芳基的特征在于其改进的热变形温度和良好的老化性能。