Study on the Synthetic Process of Polyester Resin for Powder Coatings

WANG Wei-yue[1; 2];LI Xiao-qiang[1; 2];LI Yong[1; 2];XIE Jing[1; 2];CHEN Run[1; 2];ZENG Shao-ling[1; 2]

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Modern Paint & Finishing ›› 2021, Vol. 24 ›› Issue (4) : 1-3.

Study on the Synthetic Process of Polyester Resin for Powder Coatings

WANG Wei-yue[1,2];LI Xiao-qiang[1,2];LI Yong[1,2];XIE Jing[1,2];CHEN Run[1,2];ZENG Shao-ling[1,2]

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Abstract

The influencing factors of esterification reaction stage,the judgment basis of esterification reaction process and the variation trend of resin viscosity in vacuum polycondensation stage were analyzed.The results showed that:reducing the heating rate in the stage of"alcohol running"intense temperature,increasing the heating rate in the stage of"alcohol running"less,setting reflux ratio to gradually increase first and then gradually decrease,and controlling the steam temperature of distillation column within 100℃are beneficial to balance the heating rate and"alcohol running".The process of esterification can be judged by the weight of esterification water,the viscosity growth rate of resin in vacuum polycondensation stage can be divided into three stages,and the online viscosity and cone plate viscosity have a good linear fitting relationship.

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synthetic process;polyester resin;powder coatings

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WANG Wei-yue[1,2];LI Xiao-qiang[1,2];LI Yong[1,2];XIE Jing[1,2];CHEN Run[1,2];ZENG Shao-ling[1,2]. Study on the Synthetic Process of Polyester Resin for Powder Coatings[J]. Modern Paint & Finishing. 2021, 24(4): 1-3