An organopolysiloxane-grafted polybenzobisoxazole and a method for the preparation thereof are disclosed, said polybenzobisoxazole comprising repeat units having formulas (VI) and (VII), wherein the repeat unit (VI)/repeat unit (VII) molar ratio is in the range of 100/0 to 1/99
in which A¹ denotes a tetravalent aromatic group,
A² denotes a divalent organopolysiloxane group having the formula (VIII)
in which R¹ denotes a divalent organic group having at least 2 carbon atoms, R² through R⁶ independently denote monovalent organic groups, n is an integer having a value of at least 1 and m is 1 or 2 and
A³ comprises at least one group selected from reactive side chain-free divalent aromatic groups and reactive side chain-substituted divalent aromatic groups, with the proviso that the molar ratio of reactive side chain-free divalent aromatic groups to reactive side chain-substituted divalent aromatic groups is in the range of 100/0 to 0/100.
本发明公开了一种有机聚
硅氧烷接枝的聚苯并二
异噁唑及其制备方法,所述聚苯并二
异噁唑包括具有式(VI)和(VII)的重复单元,其中重复单元(VI)/重复单元(VII)的摩尔比范围为 100/0 至 1/99
其中 A¹ 表示四价芳香基团、
A² 表示具有式 (VIII) 的二价有机聚
硅氧烷基团
其中 R¹ 表示至少有 2 个碳原子的二价有机基团,R² 至 R⁶ 独立地表示一价有机基团,n 是至少为 1 的整数,m 是 1 或 2,以及
A³ 包括至少一个选自无反应侧链二价芳香基团和反应侧链取代二价芳香基团的基团,但无反应侧链二价芳香基团与反应侧链取代二价芳香基团的摩尔比在 100/0 至 0/100 之间。