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    • 6. 发明授权
    • Stabilized copolycarbonate from dihydroxy diphenyl cycloalkane
    • 来自二羟基二苯基环己烷的稳定的共聚碳酸酯
    • US5086159A
    • 1992-02-04
    • US568460
    • 1990-08-15
    • Karl-Herbert FritschUwe WesteppeWerner NouvertneDieter Freitag
    • Karl-Herbert FritschUwe WesteppeWerner NouvertneDieter Freitag
    • C08G64/00C08G64/06C08L69/00
    • C08G64/06
    • Copolycarbonates derived from known bisphenols and small quantities of dihydroxydiphenyl cycloalkanes corresponding to formula (I) ##STR1## wherein R.sup.1 and R.sup.2 denote, independently of one another, hydrogen, halogen, preferably chlorine or bromine, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl, preferably phenyl, and C.sub.7 -C.sub.12 aralkyl, preferably phenyl-C.sub.1 -C.sub.4 -alkyl, in particular benzyl,m denotes an integer with a value from 4 to 7, preferably 4 or 5,R.sup.3 and R.sup.4, which are selected independently for each X, denote, independently of one another, hydrogen or C.sub.1 to C.sub.6 alkyl, andX denotes carbon under the condition that R.sup.3 and R.sup.4 are both alkyl on at least one X atoms are disclosed. These copolycarbonates are characterized by their improved processing stability.
    • 衍生自对应于式(I)的已知双酚和少量二羟基二苯基环烷烃的共聚碳酸酯其中R1和R2彼此独立地表示氢,卤素,优选氯或溴,C1-C8烷基,C5- C 6环烷基,C 6 -C 10芳基,优选苯基和C 7 -C 12芳烷基,优选苯基-C 1 -C 4烷基,特别是苄基,m表示4至7,优选4或5的整数,R 3和R 4 对于每个X独立选择,其中R 3和R 4在至少一个X原子上都是烷基的条件下,彼此独立地表示氢或C1-C6烷基,X表示碳。 这些共聚碳酸酯的特征在于其改进的加工稳定性。