有机硅-反应型乳化剂改性醋丙乳液的研制

Development of organic silicon-reactive emulsifier modified vinyl acetate-acrylate emulsion

以VAc(醋酸乙烯酯)为硬单体、BA(丙烯酸丁酯)为软单体和A-174(γ-甲基丙烯酰氧基丙基三甲氧基硅烷)为功能性单体,以OP-10(壬基酚聚氧乙烯醚)、SDS(十二烷基硫酸钠)和反应型乳化剂DNS-86[烯丙氧基壬基酚聚氧乙烯(10)醚硫酸铵]为复合乳化剂,以乙二醇丁醚为成膜助剂,采用预乳化半连续滴加法制备了改性醋丙乳液。研究结果表明:当反应温度为80℃、w(成膜助剂)=5%(相对于乳液质量而言)、w(复合乳化剂)=4.5%和w(A-174)=4%~6%(均相对于总单体质量而言)时,制得的改性醋丙乳液具有相对最好的综合性能。

With VAc（vinyl acetate）as hard monomer,BA（butyl acrylate）as soft monomer and A-174（γ-methyl acryloyloxy propyl trimethoxy silane）as functional monomer,OP-10（nonylphenol polyoxyethylene ether）,SDS（sodium dodecyl sulfate）and reactive emulsifier DNS- 86[allyloxy nonylphenol polyoxyethylene（10）etherammonium sulfate] as composite emulsifier,ethylene glycol butyl ether as film-forming additive,the modified vinylacetate- acrylate emulsion was prepared by pre- emulsification semi- continuous dripping method.The researchresults showed that the modified vinyl acetate-acrylate emulsion had the relatively best combination property whenreaction temperature was 80 ℃,mass fractions of composite emulsifier,A- 174 and film- forming additive were4.5% in total monomers,4%-6% in total monomers,and 5% in emulsion,respectively.