Trialkylsilyloxy-1,1-diphenyl ethylenes and polymers produced therewith
    34.
    发明授权
    Trialkylsilyloxy-1,1-diphenyl ethylenes and polymers produced therewith 失效
    三烷基甲硅烷氧基-1,1-二苯基乙烯和由其制备的聚合物

    公开(公告)号:US5153291A

    公开(公告)日:1992-10-06

    申请号:US492843

    申请日:1990-03-13

    摘要: Trialkylsilyloxy-1,1-diphenyl ethylenes corresponding to general formula I, new polymers produced therewith terminated by aryl trialkylsilyl ether groups or by phenolic hydroxyl groups and a process for the production of these polymers by anionic polymerization ##STR1## in which R.sup.1, R.sup.2 .dbd.H, C.sub.1 -C.sub.4 alkyl, OCH.sub.3,R.sup.3 .dbd.H, C.sub.1 -C.sub.4 alkyl, O--C.sub.1 -C.sub.4 alkyl,R.sup.4 .dbd.H, C.sub.1 -C.sub.4 alkyl,R.sup.5 .dbd.C.sub.1 -C.sub.4 alkyl,R.sup.6 .dbd.H, C.sub.1 -C.sub.4 alkyl.

    摘要翻译: 对应于通式I的三烷基甲硅烷氧基-1,1-二苯基乙烯,通过芳基三烷基甲硅烷基醚基团或酚羟基封端的新聚合物和通过阴离子聚合制备这些聚合物的方法(I),其中R 1 ,R2 = H,C1-C4烷基,OCH3,R3 = H,C1-C4烷基,O-C1-C4烷基,R4 = H,C1-C4烷基,R5 = C1-C4烷基,R6 = H,C1- C4烷基。

    Sequential copolymers based on cyclic carbonates and esters
    38.
    发明授权
    Sequential copolymers based on cyclic carbonates and esters 失效
    基于环状碳酸酯和酯的顺序共聚物

    公开(公告)号:US4965300A

    公开(公告)日:1990-10-23

    申请号:US443041

    申请日:1989-11-27

    IPC分类号: C08G63/64 C08G64/00 C08G64/18

    CPC分类号: C08G64/18

    摘要: Polymers having a sequential structure of the following formula--A--X--B].sub.r (I)with r=1 to 20, in which --A-- is a polymer of a cyclic carbonate, --B-- is a polymer of a lactone and --X-- is a link, with a decreasing concentration of residues of the cyclic carbonate in the --B-- direction and a decreasing concentration of residues of the lactone in the --A-- direction, and the use of the these products as molding compositions.

    摘要翻译: 具有以下式的顺序结构的聚合物-AXB] r(I),其中r = 1至20,其中-A-是环状碳酸酯的聚合物,-B-是内酯的聚合物,-X-是 一个环节,环状碳酸酯在-B-方向的残留浓度降低,内酯残留在-A-方向上的浓度降低,以及这些产物用作模塑组合物。