Process for the preparation of copoly(arylene sulfide) having a
decreased amount of disulfide radicals
    42.
    发明授权
    Process for the preparation of copoly(arylene sulfide) having a decreased amount of disulfide radicals 失效
    制备二硫键数量少的共聚(亚芳基硫醚)的方法

    公开(公告)号:US4977224A

    公开(公告)日:1990-12-11

    申请号:US437701

    申请日:1989-11-17

    CPC classification number: C08G75/029 C08G75/0263 C08G75/14

    Abstract: A process for preparation of a copoly(arylene sulfide) which has a decreased amount of disulfide radicals and corresponds to the structure ##STR1## wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.45 to 0 and n is at least 50,comprising contacting a copoly(arylene sulfide) corresponding to the structure ##STR2## wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.50 to 0.001 and n is at least 25,in the melt phase with a diiodoaromatic compound corresponding to the structureI-A-IwhereinA is a divalent substituted or unsubstituted aromatic radical.

    Abstract translation: 一种制备二硫键数量少并且对应于[(-AS-)1-x(-ASS-)x] n结构的共聚(亚芳基硫醚)的方法,其中A是二价取代或未取代的芳族 基团,x在0.45至0的范围内,n至少为50,其中包括使对应于[(-AS-)1-x(-ASS-)x] n结构的共聚(亚芳基硫醚) 二价取代或未取代的芳族基团,x在0.50至0.001的范围内且n至少为25,在熔融相中与对应于其中A是二价取代或未取代的芳族基团的结构IAI的二碘代芳族化合物相结合。

    Olefination of iodoaromatic compounds
    44.
    发明授权
    Olefination of iodoaromatic compounds 失效
    碘芳香化合物的烯化

    公开(公告)号:US4935559A

    公开(公告)日:1990-06-19

    申请号:US303347

    申请日:1989-01-30

    CPC classification number: C07C2/861 C07C17/16 C07C2531/04

    Abstract: A method of preparing an aryl alkene compound comprising reacting an iodoaromatic compound an alkene and an alkanol in the presence of a palladium catalyst and the absence of a Bronsted base.

    Abstract translation: 一种制备芳基烯烃化合物的方法,包括在钯催化剂存在下和不存在Bronsted碱的情况下使碘芳香族化合物与烯烃和链烷醇反应。

    Method to render surfaces water repellent
    50.
    发明授权
    Method to render surfaces water repellent 有权
    使表面防水的方法

    公开(公告)号:US08221533B2

    公开(公告)日:2012-07-17

    申请号:US13177035

    申请日:2011-07-06

    CPC classification number: C04B41/46 C04B2111/27 C04B41/502 C04B2103/0094

    Abstract: A method to render stone, ceramic, or cementitious structures water repellent is disclosed. The method includes the step of contacting the stone, ceramic, or cementitious structures with an alkylphosphonic acid. The alkylphosphonic acid can be dispersed in an aqueous medium and can be at least partially neutralized with ammonia, an amine, or a basic alkali salt.

    Abstract translation: 公开了一种提供石材,陶瓷或水泥结构防水剂的方法。 该方法包括使石头,陶瓷或水泥结构与烷基膦酸接触的步骤。 烷基膦酸可以分散在水性介质中,并且可以用氨,胺或碱性碱盐至少部分中和。

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