Low-hydroxyl-value hydroxyl-terminated polyester resin for Tetramethoxymethylglycuril curable texture powder coating and preparation method thereof

A technology of tetramethoxymethyl glycoluril and hydroxyl-terminated polyester, which is applied in the field of polyester resin, can solve problems such as unfavorable surface texture, unfavorable mechanical properties, viscosity growth, etc., and achieve good mechanical properties and weather resistance, and strong three-dimensional effect , fine texture effect

Active Publication Date: 2017-06-13
GUANGZHOU KINTE IND
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The hydroxyl value of the polyester resin for textured powder coatings of polyester/tetramethoxymethyl glycoluril system is preferably 25~35mgKOH/g. If the hydroxyl value is too low, the slow curing speed is not good for the mechanical properties, and if the hydroxyl value is too high, it is not conduci...

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
  • Low-hydroxyl-value hydroxyl-terminated polyester resin for Tetramethoxymethylglycuril curable texture powder coating and preparation method thereof
  • Low-hydroxyl-value hydroxyl-terminated polyester resin for Tetramethoxymethylglycuril curable texture powder coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Some specific examples are enumerated below to illustrate the present invention. Table 1 shows the composition of the formulations of Examples A to E and Comparative Examples F and G and the properties of the synthesized polyester resin.

[0023] The preparation method of embodiment A is as follows: One-time feeding: In a 100L reactor, add a proportioned amount of trimethylolpropane and / or neopentyl glycol, and heat up to 140°C to melt the material; then add proportioned amounts of terephthalic acid and isophthalic acid in sequence , succinic acid and catalyst monobutyltin oxide, and continue to heat up the reaction with nitrogen gas, until 175 ° C esterification water begins to form and distill out; Heating and heat preservation: Then gradually heat up to 240°C at a speed of 1-1.5°C / 10min, and keep warm at 240°C until the column top temperature is lower than 70°C. After the material is clear and transparent, the acid value of the sample is 13.5mgKOH / g, and the melt v...

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

No PUM Login to view more

Abstract

The invention discloses low-hydroxyl-value hydroxyl-terminated polyester resin for Tetramethoxymethylglycuril curable texture powder coating. The low-hydroxyl-value hydroxyl-terminated polyester resin is obtained by melt polycondensation of the following ingredients (by weight): 0-3% of trimethylol propane, 0-3% of 1,2,6-hexanetriol, 35-40% of dihydric alcohol, 43-52% of terephthalic acid, 5-14% of m-phthalic acid, 0-4% of succinic acid and 0.05-0.12% of a catalyst. The invention also discloses a preparation method of the polyester resin. The texture powder coating prepared by the use of the synthesized polyester resin has fine and strong three-dimensional coating texture and good mechanical property and weatherability.

Description

technical field [0001] The invention relates to a polyester resin, in particular to a low hydroxyl value terminal hydroxyl polyester resin for curing texture powder coatings with tetramethoxymethyl glycoluril. Meanwhile, the present invention also relates to a preparation method of the polyester resin. Background technique [0002] Textured powder coatings include different texture types such as continuous pattern, net pattern, moiré pattern and peacock pattern. Therefore, it is widely used in 3C and automobile bumpers and other fields. At present, there are mainly three systems of texture powder coatings: epoxy, epoxy / polyester and polyester / tetramethoxymethyl glycoluril. Among them, epoxy and epoxy / polyester systems are limited in manufacture and application due to the use of irritating catalyst aluminum acetylacetonate and poor outdoor weather resistance. [0003] Polyester resins for powder coatings can be divided into carboxyl-terminated polyester resins and hydroxyl...

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): C08G63/20C08G63/78C09D167/02C09D5/03C09D5/28C09D7/12
CPCC08G63/20C08G63/78C08K5/3445C09D5/032C09D5/033C09D167/02
Inventor 林锡恩李勇胡百九谢静刘亮顾宇昕
Owner GUANGZHOU KINTE IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap