
第43卷第8期 2013年8月
涂料工业
PAINT&COATINGS INDUSTRY
Vol.43No.8 Aug.2013
二聚酸改性环氧高固含量涂料的研制及性能研究方健君,周磊,徐科,马胜军(中海油常州涂料化工研究院,江苏常州213016)摘要:分析了二聚酸改性环氧树脂与传统E-44环氧树脂在物理性能、与固化剂的混容性以及固
化漆膜玻璃化温度方面的差异;同时,用二聚酸改性环氧树脂研制高固含量涂料,并与传统的高固含量环氧涂料进行性能对比。结果表明:用二聚酸改性环氧树脂研制的高固含量环氧涂料具有较低的黏度,固化得到的漆膜具有良好的物理机械性能。通过对防腐性能、耐化学品性、耐溶剂性能、与车间底漆的兼容性的测试发现,该高固含量环氧涂料综合性能优异,能够满足重防腐领域的防腐性能要求
关键词:环氧涂料:高固含量:二聚酸改性环氧
中图分类号:TQ635.2
文献标识码:A
文章编号:02534312(2013)08-0001-07
Formulation of Dimer Acid Modified Epoxy High Solid Coating andIts Properties
Fang Jianjun,Zhou Lei,Xu Ke,Ma Shengjun
(CNOOC Changzhou Paint and Coatings Industry Research Institute,Changzhou,Jiangsu213016,China)
Abstract:The difference of the physical properties, compatibility with curing agents and glass transition temperature of cured film of dimer acid modified epoxy and traditional E 44 epoxy resin was analyzed. Meanwhile, high solid coating was formulated based on the dimer acid modified epoxy and its properties were compared with traditional epoxy high solid coat-ings. It was found that high solid coatings based on dimer acid modified epoxy exhibited low viscosity and excellent mechanical performance.Furthermore, according to the anticorrosive performance, chemical resistance, solvent resistance and compatibility test with shopprimer, it was concluded that the dimer acid modified epoxy high solid coating presented outstanding
comprehensive properties and could meet the demand in heavy - duty field. Key Words:epoxy coating; high solid; dimer acid modified epoxy
环氧涂料以其优异的附着力、防腐性能、耐水性和耐化学品性而广泛应用于重防腐的各个领域。传统的环氧涂料以环氧当量为500左右的固体环氧树脂与黏度在4×10°mPa*s左右的聚酰胺固化剂研制而成。但是,该体系中必须含有足够的溶剂来满足最终施工所需的黏度要求。然而,随着人类对环境保护的要求越来越高,对溶剂型涂料来说,控制涂料中溶剂的含量就变得非常重要]。高固含量环氧涂料虽
然含有一定量的溶剂,但是其溶剂的含量明显低于传统的环氧重防腐涂料;同时与传统的重防腐涂料相比,该类涂料同样具有优异的防腐性能,而且其施工工艺与传统的重防腐涂料一致,可广泛应用于重防腐的各个领域2}。高固含量环氧涂料一般以环氧当量大约为190~250的液体环氧树脂来代替传统的固体环氧树脂,其与传统的环氧涂料相比最大的缺陷就是物理机械性能较差,特别是柔韧性和耐冲击性能!3。
作者简介:方健君(1982一),男,工程师,主要从事防离涂料的研究及应用。
1
探索开发