Title:
POLYESTER RESIN AND PREPARATION METHOD THEREFOR, COATING, AND WORKPIECE
Document Type and Number:
WIPO Patent Application WO/2021/016731
Kind Code:
A1
Abstract:
A polyester resin and preparation method therefor, and a coating and a workpiece comprising same. The polyester resin has an acid value of 48-55 mg KOH/g, a glass transition temperature of 68-75°C, a softening point of 110-115°C, and a melt viscosity at 200°C of 7,000-10,000 Pa·s. The polyester resin is prepared from the following raw material components by mass fraction: 20-35% of aliphatic diol, 5-25% of heteroaromatic diol, 45-60% of an aromatic dicarboxylic acid, 5-10% of a capping agent, 0.6-1.5‰ of an esterification catalyst, and 0.5-3% of an aid. By means of the method, the polyester resin is suitable for a TGIC curing powder coating; and a cured coating layer has excellent heat resistance and frost resistance performance, and thus can solve the problems of insufficient heat resistance performance and easy frosting of a polyester powder coating.
Inventors:
ZENG LI (CN)
LI YONG (CN)
XIE JING (CN)
LIU LIANG (CN)
GU YUXIN (CN)
LI YONG (CN)
XIE JING (CN)
LIU LIANG (CN)
GU YUXIN (CN)
Application Number:
PCT/CN2019/097826
Publication Date:
February 04, 2021
Filing Date:
July 26, 2019
Export Citation:
Assignee:
KINTE MATERIALS SCIENCE AND TECH CO LTD (CN)
International Classes:
C08L67/02; C08G63/16; C09D5/03
Domestic Patent References:
| WO2007087205A1 | 2007-08-02 |
Foreign References:
| CN109306232A | 2019-02-05 | |||
| CN108341925A | 2018-07-31 | |||
| CN102492125A | 2012-06-13 | |||
| CN103739831A | 2014-04-23 | |||
| CN1227853A | 1999-09-08 | |||
| CN104277210A | 2015-01-14 |
Other References:
See also references of EP 3848415A4
Attorney, Agent or Firm:
JIAQUAN IP LAW FIRM (CN)
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