蒽醌染料接枝水性聚氨酯-丙烯酸酯共聚乳液的合成及显色性能

Synthesis and color rendering properties of aqueous polyurethane-acrylate copolymer grafted with anthraquinone dye

摘要:

以异佛尔酮二异氰酸酯（IPDI）、聚四氢呋喃醚二醇（PTMG）、二羟甲基丁酸（DMBA）、1，4-丁二醇（BDO）和自制红色蒽醌染料（DYE-R）为合成聚氨酯（PU）单体，甲基丙烯酸羟乙酯（HEMA）作为封端剂制得双键封端的水性聚氨酯，再采用无皂乳液聚合法与丙烯酸单体（PA）共聚制备了玫红色水性聚氨酯-丙烯酸酯乳液，并对乳液进行测试及表征。结果表明：随着PA用量增加，乳液粒径增加，当m(PU):m(PA)为10:2时，乳液粒径为81 nm，稳定性好且有一定耐碱性；该乳液着色效果明显，热迁移率为3.54%，耐干、湿摩色牢度为4～5 级；当该乳液胶膜质量保留率为50%时，所对应温度为396.1 ℃，m(PU):m(PA)为10:2时综合性能最好。

Abstract:

Using isophorone diisocyanate (IPDI), polytetrahydrofuran ether glycol (PTMG), dimethylol butyric acid (DMBA), 1,4-butanediol (BDO) and self-made red anthraquinone dye (DYE-R) as monomers to synthesize polyurethane (PU), and 2-hydroxyethyl methacrylate (HEMA) as end-capping agent, double-bond terminated waterborne polyurethane was prepared, and then soap-free emulsion polymerization method was adopted. The results showed that with the increase of PA content, the particle size of the emulsion increased. When m(PU):m(PA) was 10:2, the particle size of the emulsion was 81 nm, which had good stability and certain alkali resistance. The emulsion has obvious coloring effect, the thermal mobility is 3.54%, and the color fastness to dry and wet rubbing is 4 ~ 5 grades. When the mass retention rate of the emulsion film is 50%, the corresponding temperature is 396.1℃, and m(PU):m(PA) is 10:2, the comprehensive performance is the best.