水性油墨用室温交联丙烯酸酯乳液的研究

以甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸为共聚单体,双丙酮丙烯酰胺(DAAM)为功能单体,采用半连续法乳液聚合技术,合成了含有酮羰基的聚丙烯酸酯乳液。以己二酸二酰肼为交联剂,获得的丙烯酸酯乳液在室温贮存时不产生交联反应,而在干燥时由于体系pH值发生变化,在酸的催化下可固化成膜。结果表明,加入3%的DAAM制得的丙烯酸酯乳液,固含量达50%左右,粒径主要分布在68.1 nm左右,且分布范围较窄,室温交联胶膜透明度、光泽度高,成膜速度快,各项性能优异。

Study on Polyacrylate Emulsion Curable at Ambient Temperature for Water-based Ink

Polyacrylate emulsion containing ketone carbonyl was obtained by semi-continuous emulsion polymerization with methyl methacrylate, butyl acrylate, and acrylic acid as co-monomers and diacetone acrylamide as functional monomer. The acrylic emulsion was produced by adipic dihydrazide as the crosslinker, which does not crosslink reaction in storing at room temperature, and can solidify in the later drying stage when the ammonia volatile and the pH value of the drying film becomes low. The result showed that the solid content of acrylate emulsion reaches 50% with 3% diacetone acrylamide addition; the particle size is around 68. 1 nm and the distribution is narrow; the film cured at room temperature has high opacity, high-gloss, fast film-forming rate, and good overall performance.