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

A kind of self-catalyzed fast-curing pure polyester resin and its preparation method and application

A polyester resin, rapid curing technology, used in polyester coatings, powder coatings, coatings, etc., can solve the problems of loss of catalytic activity, inability to achieve rapid curing, poor film performance stability, etc.

Active Publication Date: 2021-05-18
黄山市向荣新材料有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the additive quaternary ammonium salt curing accelerator often has the problem of high viscosity of the polyester resin in the later stage, and even a very small amount of curing accelerator is unevenly mixed, which will lead to a large difference in curing activity of the same batch of polyester resin; Furthermore, the additive-type quaternary ammonium salt curing accelerators are generally small molecular compounds, which can easily absorb water and lose their catalytic activity, thereby affecting the storage stability of polyester resins; The powder coating prepared by the polyester resin of the amine salt curing accelerator has poor water boiling resistance, and too much free quaternary ammonium salt may cause the final coating to yellow easily, and a small amount of addition cannot guarantee a fast curing speed. Therefore, adding Type curing accelerators often lead to poor film performance stability
[0004] For example, Chinese patent CN107151315A discloses a polyester resin for powder coatings with self-catalytic activity. Although the polyester product can realize self-catalysis, it can only be used for indoor hybrid systems matched with E-12 epoxy resin. However, it cannot be used in outdoor TGIC systems, and its curing conditions still need 180°C / 15min, which cannot meet the needs of rapid curing

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
  • A kind of self-catalyzed fast-curing pure polyester resin and its preparation method and application
  • A kind of self-catalyzed fast-curing pure polyester resin and its preparation method and application
  • A kind of self-catalyzed fast-curing pure polyester resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The self-catalyzed fast-curing pure polyester resin described in this embodiment, based on the total amount of raw materials for preparing the polyester resin, includes the following raw material components in molar percentages:

[0028]

[0029] The preparation method of self-catalyzed fast curing type pure polyester resin of the present invention comprises the steps:

[0030] (1) Mix the catalyst, terephthalic acid, 1,4-naphthalene dicarboxylic acid, trimethyl-1,6-hexanediol and neopentyl glycol in the formula amount, and first control the temperature below 165°C Esterification reaction 3-6h;

[0031] (2) When the acid value of the mixed material is reduced to 180mgKOH / g or below, nitrogen is introduced into the reaction system for protection, and the temperature of the above mixed material is gradually raised to 205°C at a heating rate of 5°C / h for heat preservation reaction 4-8h;

[0032] (3) When the acid value of the reaction mixture is reduced to 75mgKOH / g o...

Embodiment 2

[0038] The self-catalyzed fast-curing pure polyester resin described in this embodiment, based on the total amount of raw materials for preparing the polyester resin, includes the following raw material components in molar percentages:

[0039]

[0040]

[0041] The preparation method of self-catalyzed fast curing type pure polyester resin of the present invention comprises the steps:

[0042](1) Mix the catalyst, terephthalic acid, 1,4-naphthalene dicarboxylic acid, trimethyl-1,6-hexanediol and neopentyl glycol in the formula amount, and first control the temperature below 165°C Esterification reaction 3-6h;

[0043] (2) When the acid value of the mixed material is reduced to 180mgKOH / g or below, nitrogen is introduced into the reaction system for protection, and the temperature of the above mixed material is gradually raised to 215°C at a heating rate of 5°C / h for heat preservation reaction 4-8h;

[0044] (3) When the acid value of the reaction mixture is reduced to ...

Embodiment 3

[0050] The self-catalyzed fast-curing pure polyester resin described in this embodiment, based on the total amount of raw materials for preparing the polyester resin, includes the following raw material components in molar percentages:

[0051]

[0052] The preparation method of self-catalyzed fast curing type pure polyester resin of the present invention comprises the steps:

[0053] (1) Mix the catalyst, terephthalic acid, 1,4-naphthalene dicarboxylic acid, trimethyl-1,6-hexanediol and neopentyl glycol in the formula amount, and first control the temperature below 165°C Esterification reaction 3-6h;

[0054] (2) When the acid value of the mixed material is reduced to 180mgKOH / g or below, nitrogen is introduced into the reaction system for protection, and the temperature of the above mixed material is gradually raised to 210°C at a heating rate of 5°C / h for heat preservation reaction 4-8h;

[0055] (3) When the acid value of the reaction mixture is reduced to 75mgKOH / g o...

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
softening pointaaaaaaaaaa
acid valueaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of powder coatings, in particular to a self-catalyzed fast-curing pure polyester resin, and further discloses its preparation method and its application for preparing outdoor TGIC powder coatings. The self-catalyzed rapid curing type pure polyester resin of the present invention adopts terephthalic acid, 1,4-naphthalene dicarboxylic acid, trimethyl-1,6-hexanediol, neopentyl glycol, 1,2,4 ‑Butanetriol, γ‑Trimethylammonium‑β‑Hydroxybutyric Acid, N,N,N‑Trimethyl‑2‑Hydroxycetyl Ammonium Chloride, Ethylene Glycol Bis(2‑Aminoethyl Ether) Tetra Acetic acid was used as starting material for the polymerization. The polyester resin has outstanding self-catalysis performance and high curing activity, and can realize rapid curing with the curing agent TGIC without additional addition of a curing accelerator. The cured film layer prepared by the self-catalyzed fast-curing pure polyester resin of the present invention has excellent performance, and all aspects of performance can better meet the use requirements of the outdoor pure polyester resin.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, in particular to a self-catalyzed fast-curing pure polyester resin, and further discloses its preparation method and its application for preparing outdoor TGIC powder coatings. Background technique [0002] Powder coating is a 100% solid powder that does not contain organic solvents. It is different from oil-based paints and water-based paints. It does not use solvent or water as a dispersion medium when coating, but uses air as a dispersion medium to evenly coat the workpiece. The surface is a new type of environmentally friendly paint that forms a special-purpose coating film after heating. Powder coating has the advantages of no VOC, environmental protection, energy saving, high construction efficiency and wide application range. With its advantages of economy, environmental protection, high efficiency and excellent performance, it is gradually replacing organic solvent-based coatings ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/685C09D167/02C09D5/03
Inventor 郑荣辉毕海鹏江蓉冯小浩张齐
Owner 黄山市向荣新材料有限公司
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