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    Stabilization of highly heat distortion resistant polycarbonates
    16.
    发明授权
    Stabilization of highly heat distortion resistant polycarbonates 失效
    高耐热变形聚碳酸酯的稳定化

    公开(公告)号：US5194467A

    公开(公告)日：1993-03-16

    申请号：US816918

    申请日：1992-01-03

    申请人： Helmut-Martin Meier ,  Uwe Westeppe ,  Rolf Dhein ,  Dieter Freitag ,  Martin Wandel ,  Axel Sandquist

    发明人： Helmut-Martin Meier ,  Uwe Westeppe ,  Rolf Dhein ,  Dieter Freitag ,  Martin Wandel ,  Axel Sandquist

    IPC分类号： C08K5/5435

    CPC分类号： C08K5/5435

    摘要： Highly heat distortion resistant moulding compositions are disclosed comprising an aromatic polycarbonate having molecular weights Mw (weight average) of a least 10,000, containing bifunctional carbonate 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 stands for an integer from 4 to 7,R.sup.3 and R.sup.4, which are selected individually for each X, denote, independently of one another, hydrogen or C.sub.1 -C.sub.6 -alkyl, andX denotes carbonunder the condition that R.sup.3 and R.sup.4 are both alkyl on at least one X atom andas the only thermo stabilizer, from 0.001 to 1% by weight of a siloxane corresponding to formula (II) ##STR2## wherein R and R' denote, independently of one another, C.sub.1 -C.sub.4 -alkyl or -aryl andx and y stand for the numbers 1,2 or 3 and x+y always add up to 4.

    摘要翻译： 公开了耐热变形性模塑组合物，其包含具有至少10,000的分子量Mw（重均分子）的芳族聚碳酸酯，其含有对应于式（Ia）的双官能碳酸酯结构单元，其中R1和R2独立地表示 另一个是氢，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代表4-7的整数，R3和R4分别为 每个X彼此独立地表示氢或C 1 -C 6 - 烷基，X表示碳，在R 3和R 4均为至少一个X原子上为烷基且仅为热稳定剂的情况下，为0.001至1％ 重量的对应于式（II）的硅氧烷（II）其中R和R'彼此独立地表示C 1 -C 4 - 烷基或 - 芳基，x和y表示数字1,2或3 并且x + y总是最多为4。