| 摘要 |
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) <IMAGE> (Ia) wherein R1 and R2 denote, independently of one another, hydrogen, halogen, C1-C8 alkyl, C5-C6-cycloalkyl, C6-C10-aryl, or C7-C12-aralkyl, m is an integer from 4 to 7, R3 and R4 selected individually for each X, denote, independently of one another, hydrogen or C1-C6-alkyl, and X stands for carbon, under the condition that R3 and R4 are both alkyl groups on at least one X atom, and contains from 0.001 to 1% by weight of at least one siloxane corresponding to formula (II) <IMAGE> (II) wherein R denotes hydrogen, C1-C20-alkyl, C6-C10-aryl or C1-C10-alkoxy, B denotes R or A, r, s and t independently denote an integer from 0 to 200, or to formula (III) <IMAGE> (III) 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, and A denotes a C1-C20-alkyl group or a C6-C10-aryl group is characterized in its improved heat distortion temperature and good aging properties.
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