Epoxy curing agent as well as preparation method and application thereof

An epoxy curing agent and reaction technology, applied in the direction of epoxy resin coatings, coatings, etc., can solve the problems of unsuitable curing agent, expensive polythiol, and low crosslinking density, so as to increase the curing speed and improve Low curing agent activity, effect of improving low temperature surface state

Pending Publication Date: 2022-03-11
瑞奇新材料(广州)有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polymercaptan is expensive, has a strong smell, and the crosslinking density is not high, and the strength is low. It is not suitable for curing agents used in epoxy flooring. However, the curing agent prepared from the thiourea system shows good performance at low temperatures. Re

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
  • Epoxy curing agent as well as preparation method and application thereof
  • Epoxy curing agent as well as preparation method and application thereof
  • Epoxy curing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] The hexamine 20g is first placed in the reactor with thiourea 8g, and the reaction temperature is controlled at 120 ° C to 150 ° C, reacting 2H, adding a polyether amine D400 22G, continuous reaction for 1 h, adding polypropylene glycol dihydrate glycerol ether 9g reaction, control The temperature was at 70 ° C to 90 ° C, reactive 2H, sequentially added trietanolamine 5g, lithoxol 16g, benzyl alcohol 20g, mix well, and the mixture was mixed.

Example Embodiment

[0042] Example 2:

[0043] The alone diamine is first placed in the reactor with thiourea 7g, and the reaction temperature is controlled at 120 ° C to 150 ° C, and the reaction is 2 h, and the polyether amine D230 20g is added, and the reaction is continued for 1 h, and the addition of pentanediol dihydrate glycerol. The ether 8g reaction was reacted, and the control temperature was at 70 ° C to 90 ° C, reaction 2H, and tenthanolamine 8 g, nonylphenol 16g, and benzyl alcohol were sequentially added to the reactor, and mixed uniform, and the discharge was obtained to obtain an epoxy curing agent.

Example Embodiment

[0044] Example 3:

[0045] First, 20 g of the methylcyclopentamine was placed in the reaction vessel, and the reaction temperature was controlled at 120 ° C to 150 ° C, and the reaction was 2 h, and the polyether amine T403 30g was added, and the reaction was continued for 1 h, and polyethylene glycol dihydrate glycerol was added. The ether 8g reacts, the control temperature is 70 ° C to 90 ° C, reaction 2H, sequentially add 2, 4, 6-three (dimethylaminomethyl) phenol 5g, n-butanol 10g, xylene 20g, mix uniform mixing into the reactor It is discharged to obtain an epoxy curing agent.

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
Shore d hardnessaaaaaaaaaa
Shore d hardnessaaaaaaaaaa
Shore d hardnessaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of epoxy resin, and particularly relates to an epoxy curing agent and a preparation method and application thereof. The epoxy curing agent comprises the following raw materials: aliphatic amine/alicyclic amine, thiourea and polyether amine. The thiourea modified curing agent can still keep high activity at low temperature, and the problem of low activity of the curing agent caused by low temperature during construction in autumn and winter is effectively solved. Polyether amine has a bifunctional flexible chain segment, so that the molecular deflection of the curing agent is increased, long chain segments are mutually wound after curing, and the low-temperature toughness and impact resistance of a cured product are greatly improved. According to the preparation process of the epoxy curing agent, fatty amine/alicyclic amine and polyether amine react with thiourea respectively in two steps, and the situation that due to the fact that the two kinds of amine generate competitive reaction due to different activities, a designed product cannot reach an expected standard is avoided.

Description

technical field [0001] The invention belongs to the technical field of epoxy resin, and in particular relates to an epoxy curing agent and its preparation method and application. Background technique [0002] With the gradual increase of industrial plants, epoxy flooring has developed rapidly due to its advantages. Nowadays, epoxy resin used in coatings accounts for about 50% of epoxy resin applications, and epoxy flooring accounts for about 70% of the market share, which shows that its market audience cannot be underestimated. [0003] Epoxy floors can be classified into epoxy floor primers, epoxy floor primers, and epoxy floor topcoats according to the floor structure. No matter the floor coating prepared with epoxy resin and epoxy amine curing agent is solvent-based or solvent-free, there is a problem that it is difficult to cure or cannot be applied at all in the severe winter season or its alternate seasons. This is mainly because most epoxy curing agents use polyamin...

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): C08G59/50C09D163/00
CPCC08G59/504C09D163/00
Inventor 陈小双陈小金
Owner 瑞奇新材料(广州)有限公司
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