改性异构十三醇醚在纯丙/醋丙乳液中的应用
2020-08-24马昕宇李鹏
马昕宇 李鹏



摘 要:采用半连续种子乳液聚合法,以新型非离子型乳化剂改性异构十三醇醚(H﹣606)与阴离子型乳化剂十二烷基硫酸钠(SDS)复配。在纯丙乳液中研究了复配乳化剂的质量分数及配比对乳液稳定性的影响,在醋丙乳液中研究了在此种复配乳化剂体系下,pH缓冲剂的用量对乳液稳定性的影响。结果表明,当乳化剂质量分数为3%,m(H-606)∶m(SDS)=4∶1时,纯丙乳液稳定性较好。当乳化剂质量分数为3%,m(H﹣606)∶m(SDS)=4∶1,NaHCO3用量为(0.2~0.4 g) /(80 g单体+80 g水)时,醋丙乳液稳定性较好。
关 键 词:改性异构十三醇醚(H-606);纯丙乳液;醋酸乙烯酯乳液;乳液聚合
中图分类号:TQ423.2 文献标识码: A 文章编号: 1671-0460(2020)06-1142-04
Application of Modified Isotridecyl Alcohol Polyoxyethylene Ether in Pure Acrylic Emulsion and Vinyl Acetate-Acrylate Emulsion
MA Xin-yu1, LI Peng2*
(1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;
2. Handan Haoxuan Detergent Production Co., Ltd., Handan Hebei 056000, China)
Abstract: A novel non-ionic emulsifier H-606(modified isotridecyl alcohol polyoxyethylene ether) was compounded with an anionic emulsifier SDS (sodium dodecyl sulfate). The effect of the amount and ratio of compound emulsifiers on the stability of the emulsion was studied in pure acrylic emulsion. In vinyl acetate-acrylate emulsion with this compound emulsifiers system, the effect of pH buffer on the stability was studied. The result showed that, when the amount of emulsifiers was 3% , m(H-606)∶m(SDS)=4∶1, the stability of pure acrylic emulsion was good; When the amount of emulsifiers was 3%, m(H-606)∶m(SDS)=4∶1, and the amount of NaHCO3 was 0.2~0.4 g /(80 g monomer+80 g water), the stability of vinyl acetate-acrylate emulsion was good.
Key words: H-606; Pure acrylic emulsion; Vinyl acetate-acrylate emulsion; Emulsion polymerization
日前,隨着人们的环保及安全意识的提高,政府出台了一系列关于限制民用涂料、粘合剂中VOC含量的方针政策。这使得水性涂料、粘合剂成为目前科研工作人员研究的热点。其中丙烯酸酯乳液与醋酸乙烯酯乳液便是水性涂料、粘合剂中具有代表性的产品[1﹣3]。
丙烯酸酯乳液是由丙烯酸或其相应的酯类作为主要反应单体,以水为分散介质,通过乳液聚合的方式制备而成。丙烯酸酯树脂良好的透光性、耐候性、耐腐蚀性、韧性及环境友好性使其被广泛应用于涂料粘合剂、功能膜、生物医学等领域[4﹣8]。醋酸乙烯酯乳液一般由醋酸乙烯酯单体均聚或是与其他少量功能单体通过乳液聚合的方式共聚而成。醋酸乙烯酯乳液是目前用途最广,用量最大的粘合剂品种之一。其具有优良的粘接性能,且其价格低廉、生产方便,绿色环保。……
