Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polyester resin for beta-hydroxyalkylamide low temperature curing weather-resistant powder paint and preparation method thereof

A technology of hydroxyalkylamide and powder coatings, which is applied in powder coatings, polyester coatings, coatings, etc., and can solve the problem of high acid value of polyester resins and low-temperature curing of β-hydroxyalkylamide polyester resins. , poor weather resistance and other issues, to achieve good aging performance, good anti-thick film pinhole performance, and good storage stability

Active Publication Date: 2011-04-13
GUANGZHOU KINTE IND
View PDF4 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acid value of the obtained polyester resin is relatively high, and it is mainly used indoors, and its weather resistance is poor. The process and formula have reference significance for the synthesis of β-hydroxyalkylamide low-temperature curing polyester resin with an acid value of 28-36mgKOH / g. not big

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polyester resin for beta-hydroxyalkylamide low temperature curing weather-resistant powder paint and preparation method thereof
  • Polyester resin for beta-hydroxyalkylamide low temperature curing weather-resistant powder paint and preparation method thereof
  • Polyester resin for beta-hydroxyalkylamide low temperature curing weather-resistant powder paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Some specific examples are enumerated below to illustrate the present invention. Table 1 shows examples of polyester resins, and A to F show comparative examples of different monomers and process combinations. In a 10-liter reactor, add neopentyl glycol, 2-methyl-1,3-propanediol, ethylene glycol, and trimethylolpropane in proportions listed in Table 1, and heat up to material melting; then Add terephthalic acid, adipic acid, butyl tin oxide, 1,4-cyclohexanedicarboxylic acid, and continue to heat up the reaction with nitrogen gas. At about 180°C, esterification water begins to be formed and distilled out, and then the temperature is gradually raised to 250°C. React for 5-10 hours until 95% of the esterification water is discharged, and the acid value reaches 10-20 mgKOH / g, add an acidolysis agent and continue the reaction for 3-5 hours until the acid value reaches 40-50 mgKOH / g, then vacuumize and polycondense for about 1 ~4h, until the acid value reaches 28~36mgKOH / g, t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Acid valueaaaaaaaaaa
Glass transition temperatureaaaaaaaaaa
Softening pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses polyester resin for a beta-hydroxyalkylamide low temperature curing weather-resistant powder paint. The polyester resin is prepared from the following components by weight percent through melt polycondensation reaction: 25-45% of polyol, 40-55% of aromatic polybasic acid, 0-8% of aliphatic polybasic acid, 0-5% of branching agent, 5-15% of acidolysis agent and 0.01-0.15% ofesterification catalyst. The invention also discloses a preparation method of the polyester resin. The polyester resin prepared by the method disclosed in the invention has the advantages of higher glass transition temperature and softening point and proper melt viscosity and storage stability; and the powder paint prepared from the polyester resin has the advantages of excellent levelling property and mechanical properties, good thick-film pinhole resistance and the like.

Description

technical field [0001] The invention relates to a polyester resin and a preparation method thereof, in particular to a polyester resin for β-hydroxyalkylamide low-temperature curing weather-resistant powder coating and a preparation method thereof. Background technique [0002] With its advantages of economy, environmental protection, high efficiency and excellent performance, powder coatings are gradually replacing organic solvent-based coatings, becoming an important development direction in the coatings industry, and have maintained a relatively fast growth rate. Powder coating metal building materials are also widely used in all aspects of buildings due to their excellent durability, decoration and processing formability. Although the advantages of powder coatings are outstanding, compared with liquid coatings, thermosetting powder coatings generally have higher leveling and curing temperatures (180°C to 200°C) and longer curing times (10 to 30min). This makes the powde...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G63/183C08G63/181C08G63/199C08G63/20C09D167/02C09D5/03C09D7/12
Inventor 李勇何涛周年忠顾宇昕
Owner GUANGZHOU KINTE IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com