Unlock instant, AI-driven research and patent intelligence for your innovation.

High-elasticity epoxy curing agent and preparation method thereof, and epoxy resin

A technology of epoxy curing agent and epoxy resin, which is applied in the field of epoxy resin, can solve the problems of reducing crosslinking density and mechanical properties, and achieves improved chemical resistance and mechanical strength, improved shear strength, and excellent performance Effect

Active Publication Date: 2020-11-10
深圳市宝安区新材料研究院
View PDF14 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main methods to achieve epoxy toughening include chemical and physical methods, such as selecting long-chain amino-terminated polyether or polyurethane as the curing agent for epoxy resin, and using polymer blending methods to prepare epoxy resins with different impact toughness and elongation at break. Elongated elastomers, but with the lengthening of polyether and polyurethane chains, the crosslink density is reduced, and the mechanical properties are reduced while improving elasticity

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
  • High-elasticity epoxy curing agent and preparation method thereof, and epoxy resin
  • High-elasticity epoxy curing agent and preparation method thereof, and epoxy resin
  • High-elasticity epoxy curing agent and preparation method thereof, and epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0033] The present embodiment provides a kind of highly flexible epoxy curing agent, the structure is as follows:

[0034]

[0035] Wherein R has a formula (2) structure, and the degree of polymerization is 17; R 1 Has the formula (7) structure; R 2 It has the structure of formula (11) and the degree of polymerization is 3.

[0036] The preparation method of above-mentioned highly elastic epoxy curing agent is as follows:

[0037] (1). Add 36.6g of toluene-2,4-diisocyanate isocyanate in a four-necked flask equipped with a thermometer and stirring; weigh 100g of polypropylene glycol (M=1000) after water removal and dissolve it in 24.5g of butyl acetate Add it to the constant pressure funnel, slowly drop it into the flask under the protection of nitrogen, and react with toluene-2,4-diisocyanate isocyanate, the reaction temperature is 60°C, keep the temperature for 2 hours after dropping for 1 hour, and the reaction is complete. Cool to room temperature to obtain reaction s...

Embodiment example 2

[0041] The present embodiment provides a kind of highly flexible epoxy curing agent, the structure is as follows:

[0042]

[0043] Wherein R has a formula (2) structure, and the degree of polymerization is 17; R 1 Has the formula (7) structure; R 2 It has the structure of formula (12).

[0044] The preparation method of above-mentioned highly elastic epoxy curing agent is as follows:

[0045] (1). Add 36.6g toluene-2,4-diisocyanate isocyanate in the four-neck flask that thermometer and stirring are housed; The polypropylene glycol (M=1000) after weighing 100g dehydration is dissolved in the 26g butyl acetate, Put it into a constant pressure funnel, slowly drop it into the flask under the protection of nitrogen, and react with toluene-2,4-diisocyanate isocyanate, the reaction temperature is 60 ° C, after 1 hour of dripping, keep it warm for 2 hours, the reaction is complete, and cool to room temperature , to obtain reaction solution A.

[0046] (2). Weigh 26g of glycero...

Embodiment example 3

[0049] The present embodiment provides a kind of highly flexible epoxy curing agent, the structure is as follows:

[0050]

[0051] Wherein R has the structure of formula (1), and the degree of polymerization is 15; R 1 Has the formula (7) structure; R 2 It has the structure of formula (11) and the degree of polymerization is 3.

[0052] The preparation method of above-mentioned highly elastic epoxy curing agent is as follows:

[0053](1). Add 36.6g of toluene-2,4-diisocyanate isocyanate in a four-necked flask equipped with a thermometer and stirring; weigh 100g of polytetramethylene glycol (M=1000) after water removal and dissolve it in 24.5g of butyl acetate Add it to the constant pressure funnel, slowly add it dropwise into the flask under the protection of nitrogen, and react with toluene-2,4-diisocyanate isocyanate at a reaction temperature of 70°C. After 1 hour of dripping, keep warm for 2 hours, and the reaction is complete. Cool to room temperature to obtain reac...

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
Login to View More

Abstract

The invention discloses a high-elasticity epoxy curing agent and a preparation method thereof, and an epoxy resin, and relates to the technical field of epoxy resins. According to the high-elasticityepoxy curing agent provided by the invention, a flexible molecular chain is introduced into a main chain, so that the toughening effect is achieved, and the elongation at break reaches 50%-100%; and cyclic carbonate is introduced, so that the curing agent contains a large number of hydrogen bonds, hydroxyl groups and amine ester bonds, the adhesive force can be improved, and the chemical resistance and mechanical strength of the epoxy resin are improved; the cost can be effectively reduced by using cyclic carbonate; and the prepared high-elasticity epoxy curing agent can be physically mixed with commercially available prepolymers to obtain the epoxy resin with different tensile elongation rates.

Description

technical field [0001] The invention relates to the technical field of epoxy resins, in particular to a highly elastic epoxy curing agent, a preparation method and epoxy resins. Background technique [0002] Epoxy resin is an important thermosetting resin with excellent performance. Due to its high crosslinking density and unique molecular structure, the cured material is brittle, and its temperature resistance and pit impact are poor, which limits its application development. , so the toughening of epoxy resin has become one of the important research directions of epoxy modification. [0003] At present, the main methods to achieve epoxy toughening include chemical and physical methods, such as selecting long-chain amino-terminated polyether or polyurethane as the curing agent for epoxy resin, and using polymer blending methods to prepare epoxy resins with different impact toughness and elongation at break. Elongated elastomers, but with the lengthening of polyether and po...

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): C08G59/50C08G65/331C08G65/333
CPCC08G59/5033C08G59/5013C08G65/33358C08G65/33355C08G65/33351C08G65/331C08G65/33306C08G65/3331
Inventor 龙绪俭鲁晓东李斌仁熊东路肖增钧易松杨轩陈林生
Owner 深圳市宝安区新材料研究院