Title:
POLYESTER RESIN COMPOSITION, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/097757
Kind Code:
A1
Abstract:
Disclosed in the present invention is a polyester resin composition, comprising an amorphous saturated polyester resin and a semi-crystalline saturated polyester resin, which are both prepared from the following raw materials: diol, polyol, aromatic dicarboxylic acid, aliphatic dicarboxylic acid, an acid dissolution reagent, a catalyst, and an accelerator. The acid value of the amorphous saturated polyester resin is 30-50 mgKOH/g, the hydroxyl value is less than or equal to 10 mgKOH/g, and the melt viscosity at 200°C is 2000-6000 mPa•s, and the glass transition temperature is 50-63°C; the acid value of the semi-crystalline saturated polyester resin is 5-50 mgKOH/g, the hydroxyl value is 5-50 mgKOH/g, and the melt viscosity at 200°C is 10-4000 mPa•s; the mass ratio of the amorphous saturated polyester resin to the semi-crystalline saturated polyester resin in the polyester resin composition is 99:1-80:20. The polyester resin composition can satisfy curing by multiple types of curing agents, can be used for preparing weather-resistant powder paint at a curing condition of 140-170°C, and the coating has good mechanical properties, leveling properties and excellent weather resistance.
Inventors:
XIE JING (CN)
LI YONG (CN)
LIU LIANG (CN)
GU YUXIN (CN)
ZHANG JIE (CN)
LI YONG (CN)
LIU LIANG (CN)
GU YUXIN (CN)
ZHANG JIE (CN)
Application Number:
PCT/CN2019/119963
Publication Date:
May 27, 2021
Filing Date:
November 21, 2019
Export Citation:
Assignee:
KINTE MATERIALS SCIENCE AND TECH CO LTD (CN)
International Classes:
C08G63/183; C08G63/20; C09D5/03; C09D167/02
Foreign References:
| CN103571313A | 2014-02-12 | |||
| CN103571313A | 2014-02-12 | |||
| CN107513339A | 2017-12-26 | |||
| CN102471634A | 2012-05-23 | |||
| US20040110907A1 | 2004-06-10 | |||
| JP2019066539A | 2019-04-25 | |||
| US20140275412A1 | 2014-09-18 | |||
| EP2098552A1 | 2009-09-09 |
Attorney, Agent or Firm:
JIAQUAN IP LAW FIRM (CN)
Download PDF: