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

Epoxy resin curing agent, and preparation method and application of epoxy resin curing agent

An epoxy resin curing and epoxy resin technology, which is applied in the field of epoxy resin curing agent, can solve the problems that it cannot be used as an epoxy resin curing agent, the number of active group mercapto groups is small, and the reactivity is low, and the production cost is low, and the The effect of flexible molecular design and environmentally friendly preparation process

Inactive Publication Date: 2018-05-29
NAVAL UNIV OF ENG PLA
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these tougheners have active functional groups that react with epoxy resins, they have low crosslinking densities that react with epoxy resins, and some even have low reactivity, so they cannot be used as curing agents for epoxy resins.
Liquid polysulfide rubber is also often used as a toughening agent for epoxy resins because of its good flexibility, aging resistance and solvent resistance, but it also contains a small number of active groups and cannot be used as a curing agent for epoxy resins.

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 resin curing agent, and preparation method and application of epoxy resin curing agent
  • Epoxy resin curing agent, and preparation method and application of epoxy resin curing agent
  • Epoxy resin curing agent, and preparation method and application of epoxy resin curing agent

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] One aspect of the present invention provides the preparation method of epoxy resin curing agent, it comprises: step 1 sodium hydroxide solid is added in the beaker, add dehydrated alcohol, carry out ultrasonic dissolution in ultrasonic cleaner, the obtained sodium hydroxide ethanol The solution was introduced into No. 1 constant pressure separatory funnel with a glass rod.

[0031] Step 2 In the No. 1 three-neck flask equipped with a thermometer, a mechanical stirrer, and a No. 1 constant-pressure separating funnel, add polysulfide rubber and 1,2-dichloroethane to mix, and stir it evenly with a mechanical stirrer. Ethyl chloride can completely dissolve the polysulfide rubber, open the No. 1 constant pressure separating funnel, add sodium hydroxide ethanol solution dropwise to the No. 1 three-necked flask, and stir the reaction at a constant temperature of 50°C to 70°C for 2.5h to 3.5h. The speed is 200-400r / min, and the intermediate product is obtained.

[0032] In ste...

Embodiment 1

[0046] Add solid sodium hydroxide to a beaker, add absolute ethanol, perform ultrasonic dissolution in an ultrasonic cleaner, and use a glass rod to guide the obtained sodium hydroxide ethanol solution into No. 1 constant-pressure separating funnel.

[0047] In the No. 1 three-necked flask equipped with a thermometer, a mechanical stirrer, and a No. 1 constant-pressure separating funnel, add 1 molar amount of polysulfide rubber and 4 molar amounts of 1,2-dichloroethane to mix, and mechanically Stir it evenly with a stirrer, dichloroethane can completely dissolve the polysulfide rubber, open the No. 1 constant pressure separating funnel, add sodium hydroxide ethanol solution dropwise to the No. 1 three-necked flask, and stir and react at a constant temperature of 50°C for 3.5h , the stirring speed was 400r / min, and the intermediate product was obtained. After the temperature dropped to room temperature, the obtained intermediate product was distilled under reduced pressure, and...

Embodiment 2

[0052] Add solid sodium hydroxide to a beaker, add absolute ethanol, perform ultrasonic dissolution in an ultrasonic cleaner, and use a glass rod to guide the obtained sodium hydroxide ethanol solution into No. 1 constant-pressure separating funnel.

[0053] In the No. 1 three-necked flask equipped with a thermometer, a mechanical stirrer, and a No. 1 constant-pressure separating funnel, add 1 molar amount of polysulfide rubber and 4 molar amounts of 1,2-dichloroethane to mix, and mechanically Stir it evenly with a stirrer, dichloroethane can completely dissolve the polysulfide rubber, open the No. 1 constant pressure separating funnel, add sodium hydroxide ethanol solution dropwise to the No. 1 three-necked flask, and stir the reaction at a constant temperature of 60 ° C for 3 hours. The stirring speed was 300r / min, and an intermediate product was obtained. After the temperature dropped to room temperature, the obtained intermediate product was distilled under reduced pressur...

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
tensile strengthaaaaaaaaaa
bending strengthaaaaaaaaaa
impact strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses an epoxy resin curing agent, and a preparation method and an application of the epoxy resin curing agent. Sulfydryl is introduced into ethidene diamine, so that an active hydrogen content of liquid polysulfide rubber is greatly increased; a condensate with higher crosslinking density can be obtained by a reaction between the epoxy resin curing agent and epoxy resin; the epoxy resin curing agent is both a flexibilizer and a curing agent of the epoxy resin, similar to a commonly-used fatty amine curing agent; curing rates are matched, so that the epoxy resin curing agentcan be mixed with a general organic amine curing agent freely to achieve different rigidity and strength; and the epoxy resin curing agent is flexible in molecular design. A preparation condition of the epoxy resin curing agent is easy to implement; a preparation technology is environment-friendly; and the preparation cost is low.

Description

technical field [0001] The invention relates to the field of epoxy resin, more specifically, an epoxy resin curing agent, its preparation method and application. Background technique [0002] Epoxy resin is widely used in coatings, adhesives, Composite materials and other fields. However, due to its molecular structure, the cured epoxy resin has large internal stress, brittle quality, poor impact resistance and easy cracking. In order to improve its toughness, many studies on toughening and modifying epoxy resin have been carried out at home and abroad. [0003] The methods of epoxy resin toughening modification are: elastomer toughening, interpenetrating polymer network toughening, thermoplastic resin toughening, nanoparticle toughening, thermotropic liquid crystal polymer toughening, core-shell structure toughening, overshoot Toughened polymers, etc. Among them, the research on the toughening of reactive elastomers is the most extensive. The principle of elastomer tou...

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 Applications(China)
IPC IPC(8): C08G75/14C08G59/50
CPCC08G75/14C08G59/504
Inventor 李瑜范子松饶秋华崔志强
Owner NAVAL UNIV OF ENG PLA
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