端羟基聚苯乙烯改性UVWPU涂料制备与性能研究  

Research on Preparation and Properties of UV-curable Waterborne Polyurethane Coatings Modified by Hydroxyl-terminated Polystyrene

作　　者：邓剑如[1] 刘文钊[1] 朱亚茹[1] 

机构地区：[1]湖南大学化学化工学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2015年第12期70-73,共4页Journal of Hunan University:Natural Sciences

摘　　要：以异氟尔酮二异氰酸酯(IPDI)、聚四氢呋喃(PTMEG)和二羟甲基丙酸(DMPA)为主要原料,通过自制端羟基聚苯乙烯作为扩链剂,在紫外光固化水性聚氨酯(UVWPU)结构中引入刚性苯环基团来提高涂膜的耐热性及硬度,产物结构通过FT-IR来证实.同时研究了DMPA的用量、扩链参数以及端羟基聚苯乙烯改性对于乳液稳定性和涂膜性能的影响.结果表明,DMPA用量>6%后,乳液的储存稳定期在6个月以上,扩链参数>1.35时,涂膜外观及其涂膜性能较好;经端羟基聚苯乙烯扩链改性后的UV固化膜在5%和10%失重温度分别为245℃和282℃时,较改性前提高了32℃和27℃,涂膜的附着力、铅笔硬度均得到了提高.The UV-curable waterborne polyurethane was synthesized by using isophorone diisocyanate （IPDI）, polytetrahydrofuran （PTMEG）, dimethylol propionic acid （DMPA）, and hydroxyl-terminated polystyrene （HTPS） as materials. The rigid phenyl group was introduced into the UV-curable waterborne polyurethane （UVWPU） structure to improve heat resistance and hardness of the coating film, and the product was confirmed using FT IR. The effects of curing parameter, dosage of DMPA and HTPS on the properties of coating and emulsion stability were discussed. The results show that the storage stability of the emulsion is over 6 months when the amount of DMPA is above 6 %, and the coating film exhibits excellent appearance and good properties when the curing parameter is above 1.35. The weight-loss tempera ture of 5 % and 10 % is respectively 245 ℃ and 282 ℃, which is higher 32 ℃ and 27 ℃ than the UVWPU without using HTPS modified, and the adhesion and pencil hardness are also improved.

关 键 词：耐热性能 UV固化水性聚氨酯 端羟基聚苯乙烯 改性 

分 类 号：O06[理学]