表面保护胶带用聚丙烯酸酯乳液压敏胶的研究

Study on acrylic emulsion pressure-sensitive adhesive for protective film

用半连续预乳化种子乳液聚合法合成了保护膜用乳液压敏胶,主要研究了底相种子乳液中乳化剂的用量、多官能度氮丙啶类交联剂的用量对乳液压敏胶性能的影响。研究结果表明:随着种子乳液中乳化剂用量的增加,乳胶粒的粒径减小,乳液粘度、表面张力和接触角增加;增加交联剂的用量可显著提高乳液压敏胶的耐老化性能;同温度相比,湿度对乳液压敏胶的耐老化性能影响更加显著;被保护材料表面的极性和光洁度对压敏胶的耐老化性能亦有显著影响。

Acrylic emulsion pressure-sensitive adhesives （PSA） for protective film were prepared via seeded semi-continuous emulsion polymerization. Effects of the amount of the emulsifier in the bottom and the amount of polyfunctional aziridine cross-linker On the properties of emulsion PSA were discussed. The results indicated that when the amount of the emulsifier in the bottom increased the viscosity, surface tension and contact angle of the emulsion increased contrasted with the average particle size of the latex decreased. Research showed the weatherability and water resistance of the emulsion PSA were greatly improved with the increase of the cross-linker. Compared with temperature, the humidity had a greater effect on the weatherability of the emulsion PSA. The experiment results also showed the smoothness and the polarity of the protected material surface had a sianificant impact on the weatherabilitv of the emulsion PSA.