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    • 89. 发明公开
    • Polyimidesiloxane extended block copolymers
    • Mit Polyimids siliconeinheiten erweiterte Blockcopolymere。
    • EP0518060A2
    • 1992-12-16
    • EP92107915.8
    • 1992-05-11
    • OCCIDENTAL CHEMICAL CORPORATION
    • Rojstaczer, Sergio
    • C08G73/10C08G77/455
    • C08G73/106C08G77/455Y10T428/31663
    • Disclosed is method of making a polyimidesiloxane extended block copolymer containing at least one polyimide block made by reacting a dianhydride with a diamine that does not contain a siloxane group, and at least one polyimidesiloxane block made by reacting a dianhydride with a diamine that contains at least one siloxane group, where each polyimidesiloxane block is prepared using more than one mole of the dianhydride for each mole of the siloxane-containing diamine. That is, any siloxane-imide blocks in the polyimidesiloxane are formed from amic acid blocks terminated in anhydride groups and any imide blocks in the polyimidesiloxane are formed from amic acid blocks terminated in amine groups. The polyimidesiloxane block copolymers have higher glass transition temperatures than the corresponding non-extended block copolymers while retaining the same solubility.
    • 公开了制备聚酰亚胺硅氧烷延伸嵌段共聚物的方法,该嵌段共聚物含有至少一个通过使二酐与不含硅氧烷基团的二胺反应制得的聚酰亚胺嵌段,以及至少一种通过使二酐与至少含有二胺的二胺反应制备的聚酰亚胺硅氧烷嵌段 一个硅氧烷基团,其中每个聚硅氧烷嵌段使用每摩尔含硅氧烷的二胺使用超过1摩尔的二酐制备。 也就是说,聚酰亚胺硅氧烷中的任何硅氧烷 - 酰亚胺嵌段由以酸酐基终止的酰胺嵌段形成,聚酰亚胺硅氧烷中的任何酰亚胺嵌段由胺基封端的酰胺嵌段形成。 聚酰亚胺硅氧烷嵌段共聚物具有比相应的非延伸嵌段共聚物更高的玻璃化转变温度,同时保持相同的溶解度。