包装用丙烯酸酯压敏胶的制备与研究

Preparation and study of acrylic emulsion PSA for packaging

摘要:

以软丙烯酸丁酯（BA）、丙烯酸异辛酯（2-EHA）、甲基丙烯酸甲酯（MMA）、丙烯酸(AA)、丙烯酸羟乙酯（HEA）为原料，采用预乳化半连续乳液聚合法制备丙烯酸酯压敏胶，研究了软/硬单体配比和功能单体含量对压敏胶初粘性、持粘性和180 °剥离强度粘结性能的影响．实验结果表明，在软单体、硬单体、功能单体的配比为47.5∶10∶5和Tg=-30.4 ℃条件下，采用滚球斜坡停止法测定初粘力，滚球选择20号钢球，丙烯酸酯压敏胶的持粘力达到34 min，180 °剥离强度为0.26 N/mm．表明，乳液稳定好、黏度适中，涂布效果理想．

Abstract:

Using soft butyl acrylate (BA), isooctyl acrylate (2-EHA), methyl methacrylate (MMA), acrylic acid (AA) and hydroxyethyl acrylate (HEA) as raw materials, pre-emulsified semi-continuous Acrylic pressure-sensitive adhesive was prepared by emulsion polymerization, and soft/hard monomers were studied the effect of the ratio and functional monomer content on the initial tack, holding tack and 180 ° peel strength of the pressure-sensitive adhesive. The experimental results show that in the ratio of soft monomer, hard monomer, and functional monomer is 47.5∶10∶5 and Tg=-30. 4 ℃. The initial measurement is determined by the rolling ball ramp stop method. Adhesive force, the rolling ball chooses No. 20 steel ball, the holding force of the acrylic pressure-sensitive adhesive reaches 34 min, and the 180 ° peel strength is 0.26 N/mm. It shows that the emulsion has good stability, moderate viscosity and ideal coating effect.