摘要： 为了降低光引发剂固化前后释放的味道,一方面通过多官能团的异氰酸酯预聚物对其进行改性,制备环保型光引发剂;另一方面,研究光引发剂在漆膜中的光解反应动力学,优化光固化工艺来减少漆膜的气味。通过正交试验优化低VOC紫外光固化涂料的配方为:25%的环氧丙烯酸树脂、43%的聚氨酯丙烯酸树脂、22%的二官能团活性稀释剂、7%的三官能团活性稀释剂、3%的改性光引发剂。优化的UV光固化涂装工艺参数为:膜厚50μm,UV灯管功率为1 k W,传送带速率为1 m/min。制备的涂料和漆膜几乎没有气味,漆膜的VOC排放为0.5%,且漆膜性能较佳,适用于环保木器UV涂料及其涂装。
关键词:
低VOC涂料,
UV固化,
改性光引发剂,
正交试验
Abstract: In order to reduce the odor caused by photoinitiator released during the Uv-cu-ring process, odorless photoinitiators were prepared by chemical modification with multifunctional isocyanate prepolymers containing OH groups. Then, the kinetics of these polyurethane modified photoinitiators in the Uv-curing films were studied. The curing parameters were optimized in order to get odorless Uv-cured films. The optimum formulation of odorless Uv-cura-ble coatings by the orthogonal test: 25% epoxy acrylic resin, 43% polyurethane acrylate, 22% bifunctional reactive diluent, 7% trifunctional reactive diluent and 3% the modified Photoinitiator. The optimum Uv-curing parameters were obtained: 50 μm of film thickness, 1 kw of Uv-curing power and I meter per minute of Uv-curing transmission speed. Both the Uv-curable coatings and films were odorless. The films showed good performances and the VOC of film was 0.5%, which were applicable to odorless wood Uv-curing process.
Key words:
odorless coatings,
Uv-curable coatings,
modified photoinitiator
冯 钦, 方 田, 邓锡柱, 方 丽, 冯 俊, 叶代勇. 改性光引发剂和优化光固化工艺制备低VOC涂料[J]. 涂料工业, 2016, 46(12): 29-35.
Feng Qin, Fang Tian, Deng Xizhu, Fang Li, Feng Jun, Ye Daiyong. Preparation of LOW-VOC Coatings with Polyurethane Modified Photoinitiator and Optimized Uv-curing Technology[J]. Paint & Coatings Industry, 2016, 46(12): 29-35.