Process for producing elastomeric particles free of agglomeration
    1.
    发明授权
    Process for producing elastomeric particles free of agglomeration 失效
    生产没有附聚物的弹性体颗粒的方法

    公开(公告)号:US4269740A

    公开(公告)日:1981-05-26

    申请号:US79752

    申请日:1979-09-28

    摘要: This invention relates to a process of producing elastomeric particles, such as those of natural and synthetic powdered and crumb rubbers and to the compositions prepared in accordance with such process. Specifically, the invention comprises encapsulating the elastomeric particles with a coating or film of a preplasticized vinyl resin, such as, for example, polymers and copolymers of vinyl and vinylidene halides and the like. The resultant composite particles are free-flowing and free of irreversible agglomeration and can be used in dry-blending with other materials prior to being formed into useful articles.

    摘要翻译: 本发明涉及生产弹性体颗粒的方法,例如天然和合成粉末和碎屑橡胶的方法以及根据这种方法制备的组合物。 具体地,本发明包括用预塑化乙烯基树脂的涂层或膜包封弹性体颗粒,例如乙烯基和亚乙烯基卤化物的聚合物和共聚物等。 所得的复合颗粒是自由流动的并且没有不可逆的团聚,并且可以在形成有用制品之前与其它材料进行干混。

    Rubber toughened polyvinyl alcohol film compositions
    5.
    发明授权
    Rubber toughened polyvinyl alcohol film compositions 失效
    橡胶增韧的聚乙烯醇薄膜组合物

    公开(公告)号:US4608187A

    公开(公告)日:1986-08-26

    申请号:US595980

    申请日:1984-04-02

    申请人: Daniel M. Chang

    发明人: Daniel M. Chang

    摘要: Polymer compositions are provided which may be cast as thin, self-supporting films, useful in forming sealed envelopes or pouches containing granulated pulverulent or non-aqueous liquid materials. The cast films comprise a polymeric matrix, having at least about 50 weight percent polyvinyl alcohol, and a plurality of microdomains dispersed throughout the polymeric matrix. The films have good resistance to breakage at low temperatures and low relative humidities.

    摘要翻译: 提供聚合物组合物,其可以被铸造成薄的自支撑膜,可用于形成密封的信封或包含造粒粉状或非水性液体材料的袋。 流延膜包含具有至少约50重量%的聚乙烯醇的聚合物基质和分散在整个聚合物基质中的多个微区域。 该膜在低温和低相对湿度下具有良好的抗断裂性。

    Precrosslinked nitrile rubber polymer blends with linear polymers
    6.
    发明授权
    Precrosslinked nitrile rubber polymer blends with linear polymers 失效
    预交联丁腈橡胶聚合物与线性聚合物共混物

    公开(公告)号:US4404326A

    公开(公告)日:1983-09-13

    申请号:US204111

    申请日:1980-11-05

    申请人: Daniel M. Chang

    发明人: Daniel M. Chang

    摘要: Precrosslinked nitrile rubber polymers are prepared by interpolymerizing a polyol polyacrylate with butadiene and acrylonitrile to improve compression set, extrusion rate and die swell properties of the precrosslinked polymers and blends thereof with linear nitrile rubber polymers without sacrificing other physical and processing properties.

    摘要翻译: 预交联的丁腈橡胶聚合物是通过将多元醇聚丙烯酸酯与丁二烯和丙烯腈共聚来制备的,以提高预交联聚合物的压缩变形,挤出速率和模头膨胀性能以及其与线性丁腈橡胶聚合物的共混物,而不牺牲其它物理和加工性能。