乳液型丙烯酸酯压敏胶的研制

Synthesis of Quaternary Polymerization Acrylic Emulsion Pressure Sensitive Adhesive

利用丙烯酸丁酯、醋酸乙烯酯、丙烯酸和甲基丙烯酸-2-羟乙酯为共聚单体合成乳液型丙烯酸酯压敏胶。考察了功能单体、反应时间、乳化剂用量以及引发剂用量对压敏胶性能的影响,确定了乳液型丙烯酸酯压敏胶的最佳条件:丙烯酸丁酯与醋酸乙烯酯质量比为5∶1,丙烯酸、甲基丙烯酸-2-羟乙酯、复合乳化剂、引发剂过硫酸铵分别占软硬单体质量的8%、4%、2%、0.4%,反应时间3 h,搅拌速度为230r.min-1。所制得的丙烯酸酯压敏胶180°剥离强度达到17.3 N.(20 mm)-1,其他各项性能指标良好。

Butyl acrylate, vinyl acetate, acrylic acid and 2- hydroxyethyl methacryhte are utilized as monomer copolymerizafion to produce acrylic emulsion pressure sensitive adhesive in this experiment. The optimum reaction condition were as follows： vinyl acetate and Butyl acrylate is AA, acrylic is 8%; HEMA is 4% ; emulsifier is 2%; initiator（NH4）2S2O8 is 0.4% by weight, with reaction time 3h, mixing rate 230r·min^-1 by the analysis of the influence of functional monomer, reaction time, the amount of emulsifier, the amount of initiator to acrylic emulsion pressure sensitive adhesive. 180° remove strength is 17.3 N· （20mm）^-1. Other performance index seem to be good.