阅读说明：本技术 含水共聚物分散体和它们在涂料组合物中的用途 (Aqueous copolymer dispersions and their use in coating compositions ) 是由 K·文策尔 N·拉曼 T·M·曾 J·马丁 于 2020-02-27 设计创作，主要内容包括：一种含水共聚物分散体通过多级乳液聚合方法来获得,该方法包括：在第一聚合级的反应区中,使包含至少88wt％的C-(1)-C-(18)羧酸的乙烯酯和至多12wt％乙烯的第一单体组合物聚合,以产生Tg>20℃的第一级聚合物；和在第二聚合级的反应区中并且在该第一级聚合物存在下,使包含C-(1)-C-(18)羧酸的乙烯酯和(甲基)丙烯酸的C-(2)-C-(8)烷基酯的第二单体组合物聚合,以产生Tg≤20℃的第二级聚合物。每个聚合级在包含至少0.1wt％的保护性胶体和至少0.05wt％的离子表面活性剂的稳定化体系存在下进行。(An aqueous copolymer dispersion obtained by a multistage emulsion polymerization process comprising: in the reaction zone of the first polymerization stage, at least 88% by weight of C 1 ‑C 18 Vinyl esters of carboxylic acids andpolymerizing a first monomer composition of up to 12 wt% ethylene to produce a Tg>A first stage polymer at 20 ℃; and in the reaction zone of the second polymerization stage and in the presence of the first stage polymer, a catalyst comprising C 1 ‑C 18 Vinyl esters of carboxylic acids and C of (meth) acrylic acid 2 ‑C 8 The second monomer composition of alkyl ester is polymerized to produce a second stage polymer having a Tg ≦ 20 ℃. Each polymerization stage is carried out in the presence of a stabilizing system comprising at least 0.1% by weight of a protective colloid and at least 0.05% by weight of an ionic surfactant.)