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    • 9. 发明申请
    • POLYSILOXANE-POLYORGANO BLOCK COPOLYMERS
    • 聚硅氧烷聚合物嵌段共聚物
    • WO2012158767A1
    • 2012-11-22
    • PCT/US2012/038095
    • 2012-05-16
    • MOMENTIVE PERFORMANCE MATERIALS GMBHHUGGINS, John, M.EVERSHEIM, Hubertus
    • HUGGINS, John, M.EVERSHEIM, Hubertus
    • C08G77/14C08G77/448C08G64/18
    • C08G77/448C08G77/14
    • Disclosed herein is a process for the production of a polysiloxane-polyorgano block copolymer. The process includes reacting a reaction mixture containing (a) an ester- functional polydiorganosiloxane and (b) a bisphenolic compound or a bisphenolic compound oligomer. This process has the advantage of yielding block copolymers with controlled block structures and avoiding the impurities that may be carried over from the conventional hydroxyaryloxy-terminated-polydiorganosiloxanes. Also disclosed are ester-functional polysiloxanes and polysiloxane-polyorgano block copolymers prepared by the process of the invention. These copolymers exhibit advantageous properties such as improved low temperature properties, improved rheological properties during molding, improved clarity, chemical, scratch resistance, and improved electrical insulation properties.
    • 本文公开了一种生产聚硅氧烷 - 聚有机嵌段共聚物的方法。 该方法包括使含有(a)酯官能聚二有机硅氧烷和(b)双酚化合物或双酚化合物低聚物的反应混合物反应。 该方法具有产生具有受控嵌段结构的嵌段共聚物并避免可能由常规羟基氧基封端的聚二有机硅氧烷所携带的杂质的优点。 还公开了通过本发明的方法制备的酯官能聚硅氧烷和聚硅氧烷 - 聚有机基嵌段共聚物。 这些共聚物表现出有利的性质,例如改进的低温性能,改善模塑过程中的流变性能,改进的透明度,化学,耐划伤性和改善的电绝缘性能。