Acrylic emulsion and preparation method therefor

The invention discloses an acrylic emulsion and a preparation method therefor. The acrylic emulsion is prepared from the ingredients in parts by weight: 45-90 parts of flexible monomer, 1-40 parts of hard monomer, 1-10 parts of functional monomer, 0-1 part of molecular weight regulator, 30-55 parts of solvent, 0.1-3 parts of initiator, 0.1-2 parts of buffering agent, 0.1-1 part of reducer, 0.1-1 part of oxidant, 0.1-10 parts of anion emulsifier, 0.1-5 parts of nonionic emulsifier and 0.1-5 parts of reaction type emulsifier. The acrylic emulsion disclosed by the invention has high holding power with a polyvinyl chloride film, and adhesive failure can be prevented. 本发明公开种丙烯酸乳液及其制备方法，其中按重量份，所述丙烯酸乳液包括：软单体45～90份、硬单体1～40份、功能单体1～10份、分子量调节剂0～1份、溶剂30～55份、引发剂0.1～3份、缓冲剂0.1～2份、还原剂0.1～1份、氧化剂0.1～1份、阴离子乳化剂0.1～10份、非离子乳化剂0.1～5份、及反应型乳化剂0.1～5份。本发明的丙烯酸乳液与聚氯乙烯薄膜的持黏力强，可防止脱胶。