Preparation method of comb copolymer, acrylic comb copolymer, and impact resistant resin composition
申请人:MITSUBISHI RAYON CO., LTD.
公开号:EP0357036A2
公开(公告)日:1990-03-07
A comb copolymer consisting of a methacrylic macromonomer as a branch ingredient and acrylic ester as a backbone ingredient and being suitable for an acrylic elastomer material which is excellent in transparency, weatherability and mechanical strenth; an impact resistant acrylic resin composition obtained by blending the above comb copolymer with a PMMA (co)polymer; and a comb copolymer similarly consisting of a methacrylic macromonomer as a branch component and acrylic ester as a backbone component and being an acrylic resin which is excellent in transparency, weatherability, gloss and light resistance, are disclosed in this invention.
Preparation methods of the high molecular weight comb compolymers useful for molding materials comprising the above mentioned comb copolymers are disclosed. The disclosed preparation methods comprise, in the copolymerization of the macromonomer having a vinyl group at one end of the main chain with a vinyl monomer, conducting aqueous suspension polymerization of the monomer mixture in the presence of an initiator in a solvent which is a good solvent for the macromonomer and has a solubility of 10% by weight or more in water at 30°C, or conducting aqueous suspension poly merization of the monomer mixture in the presence of an initiator in a halogenated hydrocarbon solvent which is a good solvent for the macromonomer and has an azeotropic point with water raning from 30 to 90°C at a temperature above said azeotropic point.
一种由甲基丙烯酸大单体作为支链成分和丙烯酸酯作为主链成分组成的梳状共聚物,适用于透明性、耐候性和机械强度优异的丙烯酸弹性体材料;一种通过将上述梳状共聚物与 PMMA(共)聚合物混合而获得的抗冲击丙烯酸树脂组合物;以及一种同样由甲基丙烯酸大单体作为支链组分、丙烯酸酯作为主链组分组成的梳状共聚物,它是一种在透明度、耐候性、光泽度和耐光性方面都非常出色的丙烯酸树脂。
本发明公开了高分子量梳状共聚物的制备方法,这种高分子量梳状共聚物可用于由上述梳状共聚物组成的成型材料。所公开的制备方法包括:在主链一端带有乙烯基的大单体与乙烯基单体的共聚过程中,在引发剂的存在下,在对大单体而言是良好溶剂且在 30°C 时在水中的溶解度为 10%(重量)或以上的溶剂中对单体混合物进行水悬浮聚合、或在有引发剂存在的情况下,在卤代烃溶剂中对单体混合物进行水悬浮聚合,该卤代烃溶剂是大单体的良好溶剂,在 30 至 90°C 之间与水有共沸点,温度高于所述共沸点。