Process for the preparation of propylene glycol carbonate
    71.
    发明授权
    Process for the preparation of propylene glycol carbonate 失效
    制备丙二醇碳酸酯的方法

    公开(公告)号:US5449791A

    公开(公告)日:1995-09-12

    申请号:US251456

    申请日:1994-05-31

    CPC分类号: C07D317/36 Y02P20/142

    摘要: A process is described for the catalytic preparation of propylene glycol carbonate (PGC) by reacting propylene oxide (POX) and CO.sub.2 in PGC as reaction medium at elevated temperature and elevated pressure and separating off from the catalyst the PGC formed. The process is carried out continuously under adiabatic temperature conditions. Per unit of time, PGC as reaction medium flows into the reactor at 7 to 350 times the amount of the PGC formed per unit of time. At all points of the reactor a CO.sub.2 excess is maintained over the other reaction partner POX. Of the effluent reaction mixture, 80 to 98% by weight are returned to the entrance of the reactor, while the remainder is worked up to give PGC. The sensible heat of the reaction product resulting from the adiabatic temperature conditions can be used for the work-up.

    摘要翻译: 描述了通过在PGC中将环氧丙烷(POX)和CO 2作为反应介质在升高的温度和升高的压力下反应制备丙二醇碳酸酯(PGC)的方法,并从形成的PGC与催化剂分离。 该过程在绝热温度条件下连续进行。 每单位时间,作为反应介质的PGC以每单位时间形成的PGC的量的7〜350倍流入反应器。 在反应器的所有点上,超过另一个反应配偶体POX的CO 2过剩。 在流出物反应混合物中,80-98重量%返回到反应器的入口,其余部分被处理得到PGC。 由绝热温度条件产生的反应产物的显热可用于后处理。

    Trialkylsilyloxy-1,1-diphenyl ethylenes and polymers produced therewith
    75.
    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。

    Polyester and polyester carbonate based on 3,8-dihydroxy-5a,
10b-diphenylcoumarano-2',3',2,3-coumarane
    76.
    发明授权
    Polyester and polyester carbonate based on 3,8-dihydroxy-5a, 10b-diphenylcoumarano-2',3',2,3-coumarane 失效
    基于3,8-二羟基-5A,10B-二苯基甲醛-2',3',2,3-环氧丙烷的聚酯和聚碳酸酯

    公开(公告)号:US5134220A

    公开(公告)日:1992-07-28

    申请号:US670888

    申请日:1991-03-18

    CPC分类号: C08G63/64 C08G63/197

    摘要: Polyesters and polyester carbonates ofa) aromatic diphenols,b.sub.1) aliphatic and/or cycloaliphatic and/or aromatic dicarboxylic acids and optionallyb.sub.2) carbonic acid,containingb.sub.1) in a quantity of 0.1 to 100 mol-% andb.sub.2) in a quantity of 0 to 99.9 mol-%, based on (b.sub.1 +b.sub.2), in which 0.1 to 100 mol-% of a) consists of 3,8-dihydroxy-5a,10b-diphenylcoumarano-2',3',2,3-coumarane corresponding to formula (I) ##STR1##

    摘要翻译: a)芳族二元酚,b1)脂族和/或脂环族和/或芳族二羧酸和任选的b2)碳酸的聚酯和聚酯碳酸酯,其中b1)以0.1-100mol%和b2的量以一定量的 0〜99.9摩尔%,基于(b1 + b2),其中0.1〜100摩尔%的a)由3,8-二羟基-5a,10b-二苯基香豆素-2',3',2,3- 对应于式(I)的香豆素(I)