复合交联丙烯酸树脂皮革涂料成膜剂的合成及性能研究

Synthesis and Properties of the Composite Crosslinking Acrylic Resin Latex Film Forming Agent for Leather Coating

采用半连续乳液聚合工艺，以丙烯酸乙酯（EA）和丙烯酸丁酯（BA）等为聚合单体，以过硫酸盐和亚硫酸氢钠组成氧化一还原引发体系、十二烷基硫酸钠和脂肪醇聚氧乙烯醚为复合乳化剂进行乳液聚合，通过形成锌离子交联与化学交联复合的结构来改性用于皮革涂饰的丙烯酸树脂乳液。本文系统研究了单体配比、引发剂用量、离子交联剂和化学交联剂用量、丙烯酸用量以及保温段添加引发剂的类型对单体转化率、乳液胶膜吸水率以及力学性能的影响，并进行了皮革涂饰试验。结果表明，当mEA：MBA单体配比为288：50，引发剂用量为0．4％，丙烯酸用量为2％-3％，ZnO用量为0.5％，化学交联剂用量为0．5％-1．0％，保温段添加叔丁基过氧化氢复合亚硫酸氢钠的氧化一还原引发剂时，乳液涂层具有良好的耐寒性和耐黄变性，所涂饰的革样柔软度好、塑感轻。

The acrylate latex was synthesized via semi-continuous emulsion polymerization, with ethyl acrylate （EA） and butyl acrylate （BA） etc. as monomers, persulfate and sodium bisulfite redox system as the initiator, and sodium lauryl sulfate and aliphatic acohol polyoxyethylene ether as the emulsifier. The composite crosslinking structures were formed by adding zinc oxide and chemical crosslinking compound to modify the acrylatelatexfor leather finishing. This paper systematically studied the effect of monomer ratio, the amount of initiator, the ion and the chemical crosslinking agent, and acrylic acid as well as the initiator added during thermal insulation on monomer conversion rate and mechanical properties etc. of thelatex film. And finishingapplication was also studied afterwards. The results suggest that the composite crosslinking acrylate latex for leather finishing shows good performances in cold tolerance and anti-yellowing and the finishing leather shows good flexibility and light plastic feeling when m ： rosa monomer ratio and the amount of initiator, acrylic acid, ZnO, and chemical cross-linking agent are 288：50, 0.4%, 2 to 3%, 0.5%, and 0.5 to 1.0%, respectively, with t-butyl peroxide-sodium bisulfite adding during the thermal insulation..