双重改性耐高温丙烯酸酯压敏胶的制备

Preparation of double-modified acrylate pressure sensitive adhesive with high temperature resistant

以丙烯酸酯单体为原料、KH-570(γ-甲基丙烯酰氧基丙基三甲氧基硅烷)和GH(水性多异氰酸酯)固化剂为改性剂,制备了高性能的耐高温丙烯酸酯PSA(压敏胶)乳液,并考察了KH-570掺量、GH掺量对PSA各项性能的影响。研究结果表明:随着KH-570掺量的不断增加,PSA乳液的粒径增大、凝胶率增多且储存稳定性变差,PSA胶膜的表面粗糙度和耐热性呈递增趋势;此外,随着GH掺量或KH-570掺量的不断增加,PSA的高温持粘力增大,但180°剥离强度和初粘力下降。当w(KH-570)=0.3%(相对于总单体质量而言)、w(GH)=0.7%(相对于PSA乳液质量而言)时,PSA的综合性能相对最好。

With acrylate monomer as raw material,KH-570（γ-methylacryloyl propyl trimethoxy silane）andGH（waterborne polyisocyanate）curing agent as modifiers,an acrylate PSA（pressure sensitive adhesive）emulsionwith high property and high temperature resistant was prepared,and the influences of KH-570 and GH contents onvarious properties of PSA were investigated. The research results showed that the PSA emulsion had the enlargingparticle size,and increasing gel rate and poor storage stability,and the PSA＇s film had the trend of progressiveincrease in surface roughness and heat resistance with increasing KH-570 contents. Moreover,the PSA＇s hold tackat high temperature was increased,but its 180° peeling strength and initial tack were decreased with increasing GHor KH-570 contents. The PSA had the relatively best combination property when mass fractions of KH-570 and GHwere 0.3% in total monomers and 0.7% in PSA emulsion,respectively.