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

A special four-functional group ultra-flexible linear phenolic curing agent for heavy-duty powder coatings, its synthesis method and application

A technology of phenolic curing agent and powder coating, which is applied in the direction of powder coating, anti-corrosion coating, epoxy resin coating, etc. It can solve the problems that no patent publications have been found, and the molecular functionality cannot be increased, so as to achieve excellent compactness and comprehensive performance. Excellent, functionality-enhancing effect

Inactive Publication Date: 2018-10-12
TIANJIN XIANGSHENG NEW MATERIALS CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been reports on the flexible chain extension of epoxy resins with aliphatic dibasic acids such as adipic acid, but this method can only increase the flexibility of the molecule, and cannot increase the functionality of the molecule
[0004] Through the search, no patent publications related to the patent application of the present invention have been found

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 special four-functional group ultra-flexible linear phenolic curing agent for heavy-duty powder coatings, its synthesis method and application
  • A special four-functional group ultra-flexible linear phenolic curing agent for heavy-duty powder coatings, its synthesis method and application
  • A special four-functional group ultra-flexible linear phenolic curing agent for heavy-duty powder coatings, its synthesis method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A four-functional ultra-flexible linear phenolic curing agent for heavy-duty powder coatings. The phenolic curing agent is synthesized by two-step chemical reactions:

[0044] The first step is the synthesis of basic epoxy resin A; the second step is the synthesis of four-functional ultra-flexible phenolic curing agent B;

[0045] Wherein, the synthetic raw material composition of described basic epoxy resin A and mole fraction thereof are as follows:

[0046] Epoxy resin E-51 1 part;

[0047] 0.25 parts of dihydrazide compounds;

[0048] The synthetic raw material composition of described phenolic solidifying agent B and its mole fraction are as follows:

[0049] 0.25 parts of basic epoxy resin A;

[0050] 1 part of bisphenol A;

[0051] Ammonium salt catalyst 0.001 part.

[0052] The epoxy resin is E-51 type liquid epoxy resin; or, the molecular formula of the dihydrazide compound is [H2NNH-CO-(CH2)n-CO-HNNH2], wherein n=4-10, n The larger the value, the better ...

Embodiment 2

[0062] A four-functional ultra-flexible linear phenolic curing agent for heavy-duty powder coatings. The phenolic curing agent is synthesized by two-step chemical reactions:

[0063] The first step is the synthesis of basic epoxy resin A; the second step is the synthesis of four-functional ultra-flexible phenolic curing agent B;

[0064] Wherein, the synthetic raw material composition of described basic epoxy resin A and mole fraction thereof are as follows:

[0065] Epoxy resin E-51 2 parts;

[0066] 0.25 parts of dihydrazide compounds;

[0067] The synthetic raw material composition of described phenolic solidifying agent B and its mole fraction are as follows:

[0068] 0.25 parts of basic epoxy resin A;

[0069] 2 parts of bisphenol A;

[0070] Ammonium salt catalyst 0.001 part.

[0071] After testing, the number average molecular weight of the basic epoxy resin A is 2000-3000; the molecular weight distribution is 1.6-1.8; the glass transition temperature is 60±2°C; th...

Embodiment 3

[0084] A four-functional ultra-flexible linear phenolic curing agent for heavy-duty powder coatings. The phenolic curing agent is synthesized by two-step chemical reactions:

[0085] The first step is the synthesis of basic epoxy resin A; the second step is the synthesis of four-functional ultra-flexible phenolic curing agent B;

[0086] Wherein, the synthetic raw material composition of described basic epoxy resin A and mole fraction thereof are as follows:

[0087] Epoxy resin E-51 2.5 parts;

[0088] 0.25 parts of dihydrazide compounds;

[0089] The synthetic raw material composition of described phenolic solidifying agent B and its mole fraction are as follows:

[0090] 0.25 parts of basic epoxy resin A;

[0091] Bisphenol A 2.5 parts;

[0092] Ammonium salt catalyst 0.001 part.

[0093] After testing, the number average molecular weight of the basic epoxy resin A is 2000-3000; the molecular weight distribution is 1.6-1.8; the glass transition temperature is 60±2°C; 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
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention relates to a four-functional-group super-flexible linear phenolic curing agent dedicated for a heavy-duty anticorrosive powder coating. The phenolic curing agent is synthesized by two-step chemical reaction: a first step, synthesis of base epoxy resin A; and a second step, synthesis of the four-functional-group super-flexible linear phenolic curing agent B. The phenolic curing agent has one characteristic that the middle of a molecule contains a saturated linear aliphatic chain containing 6-12 carbons, and better flexibility is provided for a coating film after curing; another characteristic comprises that both ends of the molecule each contain two phenolic hydroxyl groups, the crosslinking density of the coating film during curing is high, the densification of the coating film after curing is good, water boiling resistance is good, the phenolic hydroxyl value of the phenolic curing agent is 0.55-0.6 mol / 100 g, and bending resistance and other comprehensive performance are good .

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a special curing agent for heavy-duty anti-corrosion powder coatings, in particular to a special-purpose four-functional group super-flexible linear phenolic curing agent for heavy-duty powder coatings, its synthesis method and application. Background technique [0002] In recent years, with the deepening of our country's understanding of "low-carbon, environmental protection, and energy-saving" work, people have paid more and more attention to heavy-duty anti-corrosion powder coatings. There are many types of curing agents for epoxy resins, including organic amines, acid anhydrides, carboxyl resins, phenols, etc., but not many can be applied to heavy-duty anti-corrosion powder coatings. my country's heavy-duty anti-corrosion powder coatings started late. At present, phenolic curing agents are commonly used. Phenolic curing agents are roughly divided into three types: phe...

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): C08G59/62C08G59/56C09D163/00C09D5/08C09D5/03
CPCC08G59/56C08G59/62C08K3/04C08K3/22C08K3/30C08K3/36C08K2003/2241C08K2003/3045C09D5/033C09D5/08C09D163/00
Inventor 石生敏赵金祥贾如徐煜慧丁树国
Owner TIANJIN XIANGSHENG NEW MATERIALS CO LTD
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