EMULSION POLYMERIZATION METHOD USING REACTIVE EMULSIFYING AGENT, AQUEOUS POLYMER DISPERSION OBTAINED BY SAME, AND POLYMER FILM
申请人:Dai-Ichi Kogyo Seiyaku Co., Ltd.
公开号:EP2765142A1
公开(公告)日:2014-08-13
Provided is an emulsion polymerization method for carrying out emulsion polymerization of monomers using a reactive emulsifier in an aqueous medium in the presence of a polymerization initiator, the emulsion polymerization method being capable of solving problems such as an enhancement of a rate of copolymerization of the reactive emulsifier with the monomer, dissolution of a bubbling trouble, a more improvement of water resistance of a coating film, etc. The emulsion polymerization is carried out using one or two or more kinds of polymerizable unsaturated monomers X having at least one carbon-carbon double bond in a molecule, one or two or more kinds of reactive emulsifiers Y having at least one polymerizable group in a molecule, and one or two or more kinds of polyfunctional monomers Z1 having two or more polymerizable unsaturated groups in a molecule and having a molecular weight per functional group of less than 150, or one or two or more kinds of hydrophilic monomers Z2 having one polymerizable unsaturated group and a hydrophilic group in a molecule and having an average molecular weight of less than 250, with a proportion of the total use amount of the polyfunctional monomer Z1 or hydrophilic monomer Z2 to the total use amount of the reactive emulsifier Y being in the range of Z1/Y = 1/3 to 1/30 or Z2/Y = 1/1 to 1/30 in terms of a mass ratio.
本发明提供了一种乳液聚合方法,用于在有聚合引发剂存在的水介质中使用活性乳化剂进行单体的乳液聚合,该乳液聚合方法能够解决诸如提高活性乳化剂与单体的共聚速度、解决起泡问题、进一步提高涂膜的耐水性等问题。乳液聚合使用一种或两种或多种可聚合的不饱和单体 X(分子中至少有一个碳碳双键),一种或两种或多种活性乳化剂 Y(分子中至少有一个可聚合的基团),以及一种或两种或多种多官能团单体 Z1(分子中含有两个或多个可聚合的不饱和基团,且每个官能团的分子量小于 150)、或分子中含有一个可聚合不饱和基团和一个亲水基团且平均分子量小于 250 的一种或两种或多种亲水单体 Z2,多官能团单体 Z1 或亲水单体 Z2 的总用量与活性乳化剂 Y 的总用量的质量比范围为 Z1/Y = 1/3 至 1/30 或 Z2/Y = 1/1 至 1/30。