丙烯酸酯乳液型压敏胶的聚合稳定性研究  

Study on polymerization stability of acrylate emulsion PSA

作　　者：冯小平[1] 李胜华[1] 何伟[1] 王玲玲[1] 

机构地区：[1]襄樊航天化学动力总公司,湖北襄樊441003

出　　处：《中国胶粘剂》2010年第9期23-26,共4页China Adhesives

摘　　要：以丙烯酸丁酯(BA)、丙烯酸-2-羟基丙基酯(HPA)、β-羧乙基丙烯酸酯(β-CEA)和苯乙烯(St)为共聚单体,过硫酸铵(APS)为引发剂,碳酸氢钠(NaHCO3)为缓冲剂,DNS-458(铵盐型阴离子乳化剂)/OP-10(普通非离子乳化剂)为复合乳化剂,采用半连续种子乳液聚合法合成了丙烯酸酯乳液型PSA(压敏胶)。研究了单体、乳化剂、引发剂及缓冲剂等对乳液聚合稳定性的影响。结果表明:共聚单体对乳液聚合稳定性的影响依次为β-CEA>BA≈HPA>St,β-CEA单体对聚合稳定性影响最显著;当w(APS)=0.6%、w(NaHCO3)≥0.3%、复合乳化剂中m(DNS-458)∶m(OP-10)=1∶1且w(DNS-458+OP-10)=0.5%时,乳液的聚合稳定性相对较好。With butyl acrylate（BA）,acrylic-2-hydroxy-propyl ester（HPA）,β-carboxyl ethyl acrylate（β-CEA） and styrene（St） as comonomer,ammonium persulfate（APS） as initiator,NaHCO3 as buffering agent and DNS-458（ammonium salt-type anionic emulsifier）/OP-10（general non-ionic emulsifier） as compound emulsifier,so an acrylate emulsion PSA（pressure sensitive adhesive） was synthesized by semi-continuous seed emulsion polymeriza-tion.The influences of monomer,emulsifier,initiator and buffering agent were investigated on stability of emulsion polymeri-zation.The results showed that the influences of comonomers on stability of emulsion polymerization were β-CEABA≈HPASt,and the influence of β-CEA monomer on polymerization stability was most evident.The stability of emulsion polymerization was relatively optimal when the mass fractions of APS and NaHCO3 were 0.6% and not less than 0.3% respectively,the mass ratio of m（DNS-458）∶m（OP-10） was 1∶1 and mass fraction of DNS-458 and OP-10 was 0.5% in composite emulsifier.

关 键 词：丙烯酸酯 乳液 稳定性 压敏胶 凝胶率 

分 类 号：TQ433.436[化学工程] TQ436.3