改性超支化醇酸树脂涂层的制备及性能  

Preparation and properties of modified hyperbranched alkyd resin coatings

作　　者：李俊坪 齐舵 葛晶 杜晓宁 郭书利 吕会勇 王娜[1,2] LI Junping;QI Duo;GE Jing;DU Xiaoning;GUO Shuli;LYU Huiyong;WANG Na(Liaoning Provincial Key Laboratory of Synthesis and Preparation of Special Functional Materials,Shenyang University of Chemical Technology,Shenyang 110142,China;Shenyang Research Institute of Industrial Technology for Advanced Coating Materials,Shenyang 110300,China;Liaoning Shunfeng New Material Technology Co.,Ltd.,Shenyang 110326,China)

机构地区：[1]沈阳化工大学辽宁省特种功能材料合成与制备重点实验室,辽宁沈阳110142 [2]沈阳先进涂层材料产业技术研究院,辽宁沈阳110300 [3]辽宁顺风新材料科技有限公司,辽宁沈阳110326

出　　处：《电镀与涂饰》2023年第4期57-65,共9页Electroplating & Finishing

基　　金：2021年辽宁省“揭榜挂帅”科技攻关项目(2021JH1/10400091);辽宁省教育厅2021年科研资助项目(LJKZ0436)。

摘　　要：以端羟基超支化聚酯和蓖麻油酸为原料,通过酯化反应合成了超支化醇酸树脂,通过红外、核磁等手段研究了它的化学结构。采用超支化醇酸树脂作为改性剂制备了固含量55%~70%的醇酸树脂涂料,考察了改性涂料的流变性能及其涂膜的力学性能、热性能与防腐性能。实验结果表明:超支化聚合物的适当添加可在不影响涂料黏度和涂装性能的基础上,有效提高醇酸树脂涂层的柔韧性和耐酸碱盐腐蚀性能,其耐弯曲性能高达2 mm,耐冲击性达到50 cm。固含量为65%的涂层综合性能最好。为进一步提高涂层的防腐性能,在该体系中添加了0.1%~0.5%的端羟基超支化聚酯改性氧化石墨烯(HGO)。循环盐雾测试320 h后发现,HGO添加量为0.5%的涂层腐蚀最轻。A hyperbranched alkyd resin was synthesized from hydroxy-terminated hyperbranched polyester and ricinoleic acid by esterification,and its chemical structure was characterized by Fourier-transform infrared(FTIR)spectroscopy and nuclear magnetic resonance(NMR)spectroscopy.A series of alkyd paint with a solid content ranging from 55%to 70%was prepared with the Hyperbranched alkyd resin as modifier.The rheological of the modified paint and the mechanical,thermal,and anticorrosive properties of its cured coating were studied.The experimental results showed that the addition of hyperbranched polymer in a proper amount effectively improved the flexibility and acid/alkali/saline resistance of alkyd coating without impairing the viscosity or coatability of the paint.The coating had a bending resistance of up to 2 mm and an impact resistance of up to 50 cm.The coating with a solid content of 65%had the best comprehensive performance.The anticorrosion property of the paint was improved further by adding 0.1%-0.5%of HGO i.e.graphene oxide modified with hydroxyl-terminated hyperbranched polyester.Through the cyclic salt spray test for 320 hours,the coating containing 0.5%of HGO was found to suffer from the slightest corrosion.

关 键 词：醇酸树脂涂料 超支化 力学性能 氧化石墨烯 改性 防腐蚀 

分 类 号：TQ630[化学工程—精细化工]