Modified polyvinyl alcohol and a solid state process for modification of
polyvinyl alcohol by free radical grafting
    2.
    发明授权
    Modified polyvinyl alcohol and a solid state process for modification of polyvinyl alcohol by free radical grafting 失效
    改性聚乙烯醇和通过自由基接枝改性聚乙烯醇的固态方法

    公开(公告)号:US5340874A

    公开(公告)日:1994-08-23

    申请号:US88991

    申请日:1993-07-07

    CPC分类号: C08F261/04

    摘要: A modified polyvinyl alcohol and a solid state process for producing modified polyvinyl alcohol wherein polyvinyl alcohol powder is sprayed with a sufficient amount of a solution of a polymerizable monomer to swell the polyvinyl alcohol powder but not dissolve it or form a slurry. The swollen polyvinyl alcohol powder is sprayed with a free radical source (an initiator) and the temperature is raised to initiate a reaction between polyvinyl alcohol and the polymerizable monomer.

    摘要翻译: 改性聚乙烯醇和固化方法制备改性聚乙烯醇,其中聚乙烯醇粉末用足够量的可聚合单体溶液喷雾以溶胀聚乙烯醇粉末但不溶解或形成浆料。 用自由基源(引发剂)喷雾膨胀的聚乙烯醇粉末,升高温度以引发聚乙烯醇与可聚合单体之间的反应。

    Solid state process for modification of polyvinyl alcohol using
Michael-type addition
    3.
    发明授权
    Solid state process for modification of polyvinyl alcohol using Michael-type addition 失效
    使用迈克尔型添加剂改性聚乙烯醇的固态方法

    公开(公告)号:US5350801A

    公开(公告)日:1994-09-27

    申请号:US89067

    申请日:1993-07-07

    CPC分类号: C08F8/34

    摘要: A solid state process for modifying polyvinyl alcohol using a Michael-type addition wherein dry polyvinyl alcohol powder is sprayed with a solution of a monomer capable of Michael-type addition in an amount sufficient to swell the polyvinyl alcohol or maintain its swollen state, but not dissolve or form a slurry of the polyvinyl alcohol. The swollen polyvinyl alcohol is sprayed with a catalyst and the temperature is raised to initiate the reaction between the polyvinyl alcohol and the monomer.

    摘要翻译: 使用迈克尔型添加剂改性聚乙烯醇的固态方法,其中干燥聚乙烯醇粉末用能够迈克尔型加成的单体溶液以足以溶胀聚乙烯醇或保持其溶胀状态的量喷雾 溶解或形成聚乙烯醇的浆液。 用催化剂喷雾膨胀的聚乙烯醇,升高温度以引发聚乙烯醇与单体之间的反应。