丙烯酸改性氯醚树脂乳液的合成研究

Synthesis and Characterization Chlorinated Polyether Resin Modified Acrylate Emulsion

采用溶液聚合法,以丙烯酸(AA)、丙烯酸丁酯(BA)和甲基丙烯酸甲酯(MMA)为混合单体,与氯醚树脂(VC-IBVE)进行接枝共聚;用中和剂三乙胺(TEA)与接枝反应产物中和成盐,得到水性丙烯酸改性氯醚树脂乳液。讨论了引发剂浓度对该体系接枝率的影响,重点研究了丙烯酸类单体用量以及混合单体中丙烯酸和丙烯酸丁酯的含量对改性乳液性能的影响。结果表明:丙烯酸类单体用量为50%,混合单体中丙烯酸和丙烯酸丁酯的含量分别为9%～11%和40%时,制得的改性乳液具有良好的稳定性、耐盐水性和优异的附着力。并用红外光谱(FT-IR)和透射电子显微镜表征(TEM)了此改性乳液。

Acrylic acid, butyl acrylate and methyl methacrylate were used as the monomers, to graftly copolymerize with vinyl chloride and vinyl isobutyl ether copolymers, which was then neutralized by triethyl- amine and dispersed into water to get a selfemulsified emulsion. The acrylate modified vinyl chloride and vinyl isobutyl ether copolymers were characterized by FT - IR and TEM. The influence of initiator concentra- tion on the grafting degree of the system was discussed, focusing on the effect of acrylic monomers amount and AA and BA levels on the properties of modified emulsion. The results showed that the emulsion could provide good storage stability, water resistance, and excellent adhesion when initiator concentration was 1.5%, acrylate 50%, acrylic acid 9% -11%. and butyl acrylate content 40%.