高剥离力苯丙乳液压敏胶的研制

Study on preparing styrene-acrylate emulsion PSA with high peeling strength

以丙烯酸丁酯（BA）、苯乙烯（St）、丙烯酸羟乙酯（HEA）和β-羧乙基丙烯酸酯（β-CEA）为共聚单体,烯丙氧基壬基酚丙醇聚氧乙烯（10）醚硫酸铵（DNS-86）为反应型乳化剂,采用半连续预乳化乳液聚合法制备出一种高剥离力苯丙乳液PSA（压敏胶）。研究结果表明：当m（BA）∶m（St）=9∶1、w（DNS-86）=2.5%、w（过硫酸铵）=0.5%~0.6%、聚合温度为78~80℃和聚合时间为4 h时,相应苯丙乳液PSA的黏度、初粘力、持粘力和180°剥离强度俱佳;高剥离力苯丙乳液PSA的性价比较高,具有广阔的市场应用前景。

With butyl acrylate（BA）,styrene（St）,hydroxyethyl acrylate（HEA） and β-carboxyethyl acrylate（β-CEA） as comonomers,DNS-86 as a reactive emulsifier,a styrene-acrylate emulsion PSA（pressure sensitive adhesive） with high peeling strength was prepared by semi-continuous pre-emulsification emulsion polymerization.The research results showed that the viscosity,initial tack,hold tack and 180° peeling strength for corresponding styrene-acrylate emulsion PSA were all good when mass ratio of m（BA）∶m（St） was 9∶1,mass fractions of DNS-86 and ammonium persulfate were 2.5% and 0.5%-0.6% respectively,polymerization temperature and polymerization time were 78-80 ℃ and 4 h respectively.The styrene-acrylate emulsion PSA with high peeling strength had broad market application prospect because its performance/price ratio was higher.