丙烯酸粉末涂料耐冲击性影响因素的研究  

Study on Factors Influencing Impact Resistance of Acrylic Powder Coatings

作　　者：汪喜涛[1] 都魁林[1] 刘亚康[1] 

机构地区：[1]北京化工大学材料学院,北京100029

出　　处：《涂料工业》2011年第2期29-32,共4页Paint & Coatings Industry

摘　　要：为了提高丙烯酸粉末涂料的耐冲击性,采用改变树脂的平均官能度、二元酸与饱和一元酸复配固化2种方法调节漆膜的化学结构,其中使用十二烷二元酸与饱和一元酸复配固化,使涂料漆膜耐冲击性从30 cm提高到50 cm。并将纳米二氧化钛以原位聚合的方法加入丙烯酸树脂中,使涂膜的硬度、耐冲击性、流平性均有提高。以二甲基咪唑为交联助剂加入到丙烯酸粉末涂料中,明显提高了漆膜的耐冲击性,当用量为0.2%时耐冲击性达到50 cm。将1%的聚乙烯蜡微粉作为添加剂加入粉末涂料生粉中挤出,使漆膜的耐冲击性达到50 cm,同时也赋予涂料消光性能。Both chemical and physics methods were used to improve impact resistance of acrylic powder coatings for automobiles. Two chemical methods were used, including change of the average functional degree and combination of monocarboxylic acid and diacid as curing agent, of which the dodecandioic acid and monocarboxylic acid reacted with acrylate during the curing process that can increase the film impact resist- ance from 30 cm to 50 cm. Furthermore, physics fillers, like nano - TiO2, could be added through in - situ polymerization, into the powder coating improving the film impact resistance hardness and leveling properties. 1,2 -dimethylimidazole was added as the curing accelerated agent to increase impact resistance up to 50 cm when used at 0. 2% lever. Micropowder PE wax can also be added co - extrudely to increase the impact resistance up to 50 cm as well as provide flating effect.

关 键 词：丙烯酸粉末涂料 耐冲击性 纳米二氧化钛 聚乙烯蜡微粉 二甲基咪唑 

分 类 号：TQ630.4[化学工程—精细化工]