利索-全球专利检索

  1. 登录
  2. 注册
发明授权
CN101792570B 一种含羟基的丙烯酸聚氨酯水分散体及其制备方法与用途 有权 转让 许可

一种含羟基的丙烯酸聚氨酯水分散体及其制备方法与用途
摘要：
本发明提供一种含羟基的丙烯酸聚氨酯水分散体的制备方法，该方法包括以下步骤：(1)通过反应，得到含羧基的端异氰酸酯基聚氨酯预聚体；(2)向步骤(1)中所得的聚氨酯预聚体中加入羟基丙烯酸酯类单体进一步反应，得到分子链含羧基和含端乙烯基的聚氨酯预聚体；(3)向步骤(2)所得聚氨酯预聚体中加入中和剂，使体系pH达到7～8，然后加入蒸馏水使预聚体分散，得到水分散型聚氨酯预聚体；和(4)向步骤(3)中所得预聚体中加入乙烯基单体和链转移剂，滴加由自由基引发剂和蒸馏水所组成的溶液，反应得到含羟基的丙烯酸聚氨酯水分散体。本发明还提供由上述水分散体和多异氰酸酯固化剂配制的车用水性罩光清漆。
摘要（英）：

The invention provides a preparation method of hydroxyl-containing crylic acid polyurethane aqueous dispersion body, comprising the following steps: (1) hydroxyl-containing terminal isocyanate group polyurethane prepolymer is obtained by reaction; (2) hydroxyl acrylic ester monomer is added in the obtained polyurethane prepolymer in the step (1) for further reaction, so as to obtain a molecular chain hydroxyl-containing terminal ethenyl containing polyurethane prepolymer; (3) neutralizer is added in the polyurethane prepolymer obtained in the step (2), the pH of the system reaches 7-8, and then distilled water is added to disperse the prepolymer, so as to obtain the dispersion-type polyurethane prepolymer; and (4) vinyl monomers and chain transfer agent are added in the step (3), and thenthe solution formed by radical initiators and distilled water is dropwise added, so as to obtain the hydroxyl-containing crylic acid polyurethane aqueous dispersion body by reaction; the invention further provides aqueous finish varnish for vehicle, which is formed by aqueous dispersion body and polyisocyanate curing agent.

公开/授权文献
0/0