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    • 56. 发明授权
    • Macrocyclic polycarbonates
    • 大环聚碳酸酯
    • US4299948A
    • 1981-11-10
    • US097272
    • 1979-11-26
    • Kurt WeirauchAlfred HorbachHugo Vernaleken
    • Kurt WeirauchAlfred HorbachHugo Vernaleken
    • C08G63/00C07C68/02C08G64/00C08G64/20C08G64/26C08G63/62
    • C08G64/26C07C68/02
    • The subject of the instant invention are polycarbonates based on diphenols of the formula I ##STR1## wherein Y is a single bond, an elkylene- or alkylidene-radical with 1 to 7 carbon atoms, a cycloalkylene- or cycloalkylidene-radical with 5 to 12 carbon atoms, ##STR2## which have weight average molecular weights (M.sub.LS) measured by light scattering of at least 15 000 and which are characterized in having an average of zero to 1.5 mols, preferably 0.3 to 1.0 mols and especially 0.3 to 0.8 mols endgroups per mol polycarbonate.The subject of instant invention is also a process for preparing these polycarbonates according to the interfacial polycondensation method, the polycarbonates thus obtained and the use of the polycarbonates according instant invention for the preparation of compounds and films.
    • 本发明的主题是基于式I(I)的二酚的聚碳酸酯,其中Y是单键,具有1至7个碳原子的亚烷基或亚烷基 - 亚基,具有 5至12个碳原子,其具有通过光散射测量的至少15000的重均分子量(MLS),其特征在于平均为0至1.5摩尔,优选为0.3至1.0摩尔,特别是0.3至1.0摩尔 每摩尔聚碳酸酯0.8摩尔端基。 本发明的主题也是根据界面缩聚方法制备这些聚碳酸酯的方法,由此获得的聚碳酸酯以及根据本发明的聚碳酸酯用于制备化合物和膜的用途。