Silane-modified polyvinyl acetals
    8.
    发明授权
    Silane-modified polyvinyl acetals 失效
    硅烷改性的聚乙烯醇缩醛

    公开(公告)号:US06794477B2

    公开(公告)日:2004-09-21

    申请号:US10217372

    申请日:2002-08-13

    IPC分类号: C08G7720

    摘要: Silane-modified polyvinyl acetals are obtained by copolymerizing a) vinyl esters of C1-15 alkylcarboxylic acids having from 1 to 15 carbon atoms, and optionally (meth)acrylates C1-15 of alcohols, olefins, dienes, vinylaromatics, or vinyl halides, with b) from 0.02 to 20.0 % by weight of an ethylenically unsaturated, hydrolyzable silicon compounds or hydrolyzable mercaptosilanes; hydrolyzing the resulting vinyl ester copolymers to 50 mol % or more of vinyl alcohol units; and acetalizing vinyl alcohol units with a C1-15 aliphatic or aromatic aldehydes, wherein from 5 to 50 % by weight of a mixture of comonomers a) and silane comonomers b), based on the total weight of comonomers a) and b), is used as an initial charge, and the remainder is metered in during polymerization, such that the ratio between the comonomers a) and silane comonomers b) remains constant throughout the polymerization, resulting in a homogeneous polymer.

    摘要翻译: 硅烷改性的聚乙烯醇缩醛通过以下方法获得:a)将具有1至15个碳原子的C1-15烷基羧酸的乙烯基酯和任选的醇,烯烃,二烯,乙烯基芳族化合物或乙烯基卤化物的(甲基)丙烯酸酯C1-15与 b)0.02至20.0重量%的烯属不饱和的可水解的硅化合物或可水解的巯基硅烷; 将得到的乙烯基酯共聚物水解成50摩尔%以上的乙烯醇单元; 和用C1-15脂族或芳族醛缩醛化乙烯醇单元,其中基于共聚单体a)和b)的总重量,5至50重量%的共聚单体a)和硅烷共聚单体b)的混合物是 用作初始电荷,其余部分在聚合期间计量,使得共聚单体a)和硅烷共聚单体b)之间的比例在整个聚合过程中保持恒定,从而产生均匀的聚合物。