Secondary cross-linked semi-interpenetrating polymer networks and
methods of making same
    71.
    发明授权
    Secondary cross-linked semi-interpenetrating polymer networks and methods of making same 失效
    二次交联半互穿聚合物网络及其制备方法

    公开(公告)号:US4970263A

    公开(公告)日:1990-11-13

    申请号:US134732

    申请日:1987-12-18

    摘要: Silicone semi-interpenetrating polymer networks are formed in thermoplastic polymer matrices by the vulcanization of a hydride group-containing silicon with a polymer containing unsaturated groups. The semi-IPN is then cross-linked by hydrolysis of SiOR groups on the polymer network, so that the OR groups are hydrolyzed to allow condensation of silanol groups to form SiOSi cross-links between the chains of the polymer network. Preferably, the polymer containing unsaturated groups in an alkoxysilyl-modified poly 1,2-butadiene. The resulting cross-linked products have improved chemical resistance, increased compressive or tensile strength and excellent temperature resistance and electrical properties for use in applications such as paper-making felts and wire and cable insulation.

    摘要翻译: 通过含氢基团的硅与含有不饱和基团的聚合物硫化,在热塑性聚合物基质中形成硅氧烷半互穿聚合物网络。 然后通过聚合物网络上的SiOR基团的水解将半IPN交联,使得OR基团被水解以允许硅烷醇基团的缩合以在聚合物网络的链之间形成SiOSi交联。 优选地,在烷氧基甲硅烷基改性的聚1,2-丁二烯中含有不饱和基团的聚合物。 所得到的交联产品具有改善的耐化学性,增加的压缩或拉伸强度和优异的耐温性和用于诸如造纸毡和电线电缆绝缘等应用的电性能。