Methacrylic resin molding material and method for production thereof
    14.
    发明授权
    Methacrylic resin molding material and method for production thereof 失效
    甲基丙烯酸树脂成型材料及其制造方法

    公开(公告)号:US4791184A

    公开(公告)日:1988-12-13

    申请号:US67932

    申请日:1987-06-29

    CPC分类号: C08F265/06

    摘要: A methacrylic resin molding material, comprising a partially cross-linked polymer gel obtained by partially polymerizing a mixture comprising (A) a resin raw material selected from the group consisting of monomeric alkyl methacrylates, .alpha., .beta.-ethylenically unsaturated monomer mixtures formed preponderantly of alkyl methacrylates and a syrup containing at least one of said monomers and at least one of the polymers thereof and (B) 4 to 150 parts by weight of a cross-linking agent based on 100 parts by weight of said resin raw material in the presence of a polymerization initiator, whereby a cross-linked polymer is formed with the aid of said cross-linking agent and said polymerization initiator to the extent that increase of the polymer formed thereby reaches 4 to 62% by weight over the polymer content of said mixture with the total polymer content kept from exceeding the upper limit of 62% by weight said molding material being recovered from the polymerization system as a non-sticky, easy-handled gel-like material which has shape-retaining properties, but which, on the application of shear stress, at normal room temperature or at an elevated temperature, is enabled to flow, and preserved for use in the manufacture of shaped articles.

    摘要翻译: 一种甲基丙烯酸树脂成型材料,其包含通过部分聚合混合物而获得的部分交联的聚合物凝胶,所述混合物包含(A)选自由甲基丙烯酸烷基酯单体,甲基丙烯酸烷基酯,α,β-烯属不饱和单体混合物组成的组中的树脂原料, 甲基丙烯酸酯和含有至少一种所述单体和至少一种聚合物的糖浆,和(B)基于100重量份的所述树脂原料在4重量份的交联剂存在下, 聚合引发剂,由此在所述交联剂和所述聚合引发剂的帮助下形成交联聚合物,使得由此形成的聚合物的增加达到所述混合物的聚合物含量的4至62重量% 总聚合物含量保持超过62重量%的上限,所述模塑材料作为非稳定性从聚合体系中回收 具有形状保持性能的易于处理的凝胶状材料,但是在施加剪切应力时,在正常室温或高温下能够流动并保存以用于制造成形 文章。