Hydroxyarylestersiloxanes
    8.
    发明授权
    Hydroxyarylestersiloxanes 失效
    羟基芳基酯硅氧烷

    公开(公告)号:US5243009A

    公开(公告)日:1993-09-07

    申请号:US851704

    申请日:1992-03-16

    IPC分类号: C08G64/18 C08G77/448

    CPC分类号: C08G77/448 C08G64/186

    摘要: Silicone-polycarbonate block copolymers are provided resulting from the reaction of certain siloxy aromatic imide siloxanes or hydroxyaromatic ester siloxanes which are made by effecting reaction between an organosiloxane having terminal aromatic anhydride groups or aromatic haloacyl groups which are each attached to silicon by silicon arylene linkages with an appropriate bishydroxyarylene compounds or hydroxyarylene amino compound. The aforementioned hydroxyaromatic imide siloxanes or hydroxyaromatic ester siloxanes are then phosgenated with a dihydric phenol or an aromatic bischloroformate. The silicone-polycarbonate block copolymers have been found to be flame retardant and useful as dielectric films and membranes, and as flame retardants in aromatic polycarbonates.

    摘要翻译: 提供的硅氧烷 - 聚碳酸酯嵌段共聚物是由某些甲硅烷氧基芳族酰亚胺硅氧烷或羟基芳族酯硅氧烷的反应产生的,这些硅氧烷或羟基芳族酯硅氧烷是通过使具有末端芳族酸酐基团的有机硅氧烷或芳族卤代酰基与硅烷基链接在硅上的反应制得的, 合适的双羟基亚芳基化合物或羟基亚芳基氨基化合物。 然后将上述羟基芳族酰亚胺硅氧烷或羟基芳族酯硅氧烷用二元酚或芳族双氯甲酸酯进行光气化。 已经发现硅氧烷 - 聚碳酸酯嵌段共聚物是阻燃剂并且可用作介电膜和膜,并且作为芳族聚碳酸酯中的阻燃剂。