高透明高流平粉末涂料用丙烯酸改性聚酯树脂的合成  

Study on Synthesis of Acrylic Modified Polyester Resin for High Transparency and High Leveling Powder Coatings

作　　者：曹惠 陆均杰 马志平 谢静 许振阳 罗逸 万貂 柯远航 王伟跃 CAO Hui;LU Junjie;MA Zhiping;XIE Jing;XU Zhenyang;LUO Yi;WAN Diao;KE Yuanhang;WANG Weiyue(Kinte Material Technology Co.,Ltd.,Dongguan,Guangdong 523988,China;China National Electric Apparatus Research Institute Co.,Ltd.,Guangzhou 510300,China)

机构地区：[1]擎天材料科技有限公司,广东东莞523988 [2]中国电器科学研究院股份有限公司,广州510300

出　　处：《涂料工业》2025年第1期69-75,共7页Paint & Coatings Industry

摘　　要：聚酯粉末涂料的折光系数高、流动性较差,导致其透明度和流平性不足,因此在聚酯树脂合成时引入自由基溶液聚合制备的丙烯酸预聚体,并采用红外光谱仪和X射线衍射仪表征其化学结构及组成,研究丙烯酸预聚体用量、酸值、黏度和玻璃化转变温度(T_(g))对丙烯酸改性聚酯树脂及其粉末涂料的外观、透明度、力学性能、贮存稳定性等的影响。结果表明:成功制备了丙烯酸改性聚酯树脂;合成中添加10%酸值为30 mgKOH/g、黏度约1720 mPa·s、T_(g)约为45.6℃的丙烯酸预聚体,所得丙烯酸改性聚酯树脂涂层相比于常规的聚酯树脂涂层,具有更高的透明度和倾斜流动性,更佳的耐水性和耐候性,同时兼顾力学性能和贮存稳定性。Due to the high refractive coefficient and poor fluidity of polyester powder coatings,their transparency and leveling property were insufficient.Therefore,during the synthesis of polyester resin,acrylic prepolymers prepared by free radical solution polymerization were introduced,then polyester resin chemical structure and composition were characterized using infrared spectrometer and X-ray diffractometer.The effects of amount of acrylic prepolymer,acid value,viscosity,and glass transition temperature(T_(g))on the appearance,transparency,mechanical properties,and storage stability of acrylic modified polyester resin and powder coating were studied.The results showed that acrylic modified polyester resin had been successfully prepared.In the synthesis,10%of an acrylic prepolymer with an acid value of 30 mgKOH/g,a viscosity of approximately 1720 mPa·s,and T_(g) of about 45.6℃was added.The resulting acrylic modified polyester resin coatings exhibited higher transparency and sloping flow compared to conventional polyester resin coatings,along with better water resistance and weathering resistance,while also maintaining mechanical properties and storage stability.

关 键 词：高透明度 高流平性 丙烯酸树脂 改性聚酯树脂 粉末涂料 

分 类 号：TQ637.82[化学工程—精细化工]