Preparation and Properties of High - Solid， Low - Viscosity and UV - Curable Star Polyester

ZHOU Yu - mei, MING Shu - jie, DUAN Xiao - jun, PENG Gang - yang, ZHU Yan - an, QU Jin - qing

doi:10.16577/j.issn.1001-1560.2022.0197

Materials Protection >

2022 , Vol. 55 >Issue 7: 155 - 159

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0197

Preparation and Properties of High - Solid， Low - Viscosity and UV - Curable Star Polyester

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1.School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;2. Carpoly Chemical Group Co. Ltd., Jiangmen 529085, China

Received date: 2022-02-12

Revised date: 2022-03-22

Accepted date: 2022-04-11

Online published: 2023-12-15

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Abstract

To overcome the shortcomings of the existing UV - curable vinyl polyesters, such as high viscosity and low curable functionality, the small molecular polyol was adopted to be used as the core to react with the anhydride to form the semi - ester firstly, and then react with the glycidyl methacrylate (GMA) via a ring - opening reaction to obtain vinyl star polyester with high solid and low viscosity. The effects of the anhydride and polyol types on the viscosity and film performances of star polyester were studied. The molecular structure and molecular weight of the polyester were characterized by Fourier transform infrared spectroscopy (FT - IR), 1H nuclear magnetic resonance (1H NMR) and gel permeation chromatography (GPC). Results showed that the number - average molecular weights of the star polyesters were ranged from 1 149 to 1 645 g/mol and the polymer dispersity index (PDI) was within 1.2. The viscosity of the polyester and the hardness of the polyester film increased with the augment of hydroxyl functionality of the polyol. Finally, with the modification through the introduction of polyether polyol (N210), the viscosity of the resin was reduced to 2 025 mPa·s, the hardness of the coated film reached 2 H, and the polyester film obtained an excellent adhesion and flexibility.

Key words： UV - curable vinyl polyester; star polyester; glycidyl methacrylate; anhydrides; polyol

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ZHOU Yu - mei, MING Shu - jie, DUAN Xiao - jun, PENG Gang - yang, ZHU Yan - an, QU Jin - qing . Preparation and Properties of High - Solid， Low - Viscosity and UV - Curable Star Polyester[J]. Materials Protection, 2022 , 55(7) : 155 -159 . DOI: 10.16577/j.issn.1001-1560.2022.0197

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