封闭型水性聚异氰酸酯的制备及其应用研究  

Study on Preparation and Application of Waterborne Blocked Polyisocyanate

作　　者：谭卉文 张政 陈景豪 Tan Huiwen;Zhang Zheng;Chen Jinghao(Guangzhou Yele New Material Technology Co.,Ltd.,Guangzhou 510000,China)

机构地区：[1]广州也乐新材料科技有限公司,广东广州529085

出　　处：《广东化工》2020年第12期51-52,47,共3页Guangdong Chemical Industry

摘　　要：以HDI异氰脲酸酯、MPEG500、DMPA、丁二醇、催化剂为主要原料,以3,5二甲基吡唑为封闭剂,合成了低解封温度、高封闭率的封闭型水性聚异氰酸酯。研究了亲水改性物质的比例和用量、扩链剂的用量和封闭剂的用量对封闭反应影响,同时考察了不同配方所制的产物应用于单组份水性烤漆中对漆膜性能的影响。结果表明该封闭型水性聚异氰酸酯于110℃就可获得较好的解封效果,可明显改善漆膜的柔韧性、附着力、硬度及耐水性能。Waterborne blocked polyisocyanate with low deblocking temperature and high blocked degree was prepared using HDI isocyanurate,MPEG500,DMPA,butylene glycol,and catalyst as the main materials and 3,5 dimethylpyrazole as the blocking agent.Theeffect of the proportion and amount of hydrophilic modified substances,chain extender content,and blocking agent content on the blocking reaction were carefully studied.The effect of products made with different formulas on the performance of single-component water-based baking paints was investigated.The results showed that the waterborne blocked polyisocyanate could obtain a good deblocking effect at 110℃,and improve the flexibility,adhesion,hardness and water resistance of the paint film.

关 键 词：封闭 水性 聚异氰酸酯 应用性能 

分 类 号：TQ630.4[化学工程—精细化工]