Title:
POLYESTER RESIN COMPOSITION, POWDER COATING AND WORKPIECE
Document Type and Number:
WIPO Patent Application WO/2021/022389
Kind Code:
A1
Abstract:
Disclosed are a polyester resin composition, a powder coating and a workpiece, the polyester resin composition comprising a high-acid-value carboxyl-terminated polyester resin and a low-acid-value carboxyl-terminated polyester resin; the high-acid-value carboxyl-terminated polyester resin has an acid value of 75-90 mgKOH/g, a melt viscosity of 2000-6000 mPa·s at 200°C, and a glass transition temperature of 55-62°C; the low-acid-value carboxyl-terminated polyester resin has an acid value of 30-37 mgKOH/g, a melt viscosity of 2000-7000 mPa·s at 200°C, and a glass transition temperature of 51-60°C; raw materials of the high-acid-value carboxyl-terminated polyester resin and the low-acid-value carboxyl-terminated polyester resin comprise partially carboxylated benzophenone compounds. The polyester resin composition is suitable for dry-mixed matting powder coatings, and may improve the weather resistance of a matting powder coating during low-temperature curing without sacrificing the mechanical properties of the coating layer, and the powder coating has a good storage stability.
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Inventors:
MA ZHIPING (CN)
LI YONG (CN)
XIE JING (CN)
LIU LIANG (CN)
GU YUXIN (CN)
ZHANG JIE (CN)
LI YONG (CN)
XIE JING (CN)
LIU LIANG (CN)
GU YUXIN (CN)
ZHANG JIE (CN)
Application Number:
PCT/CN2019/098955
Publication Date:
February 11, 2021
Filing Date:
August 02, 2019
Export Citation:
Assignee:
KINTE MATERIALS SCIENCE AND TECH CO LTD (CN)
International Classes:
C09D167/00; C08G63/12; C08G63/78; C09D5/03
Domestic Patent References:
| WO2016164742A1 | 2016-10-13 |
Foreign References:
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Other References:
See also references of EP 3835379A4
Attorney, Agent or Firm:
JIAQUAN IP LAW FIRM (CN)
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