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Modified alicyclic amine curing agent and preparation method thereof

An alicyclic amine curing agent and modifier technology, which is applied in the field of epoxy resin curing agent, can solve the problems of affecting performance, large heat release, and shrinkage cavity, so as to improve the performance of anti-whitening, improve compatibility, reduce The effect of viscosity

Inactive Publication Date: 2018-05-11
HUNAN MAGPOW ADHESIVE INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These aliphatic or cycloaliphatic polyamine curing agents have high reactivity, can be cured at room temperature and low temperature, have the advantages of low viscosity, good chemical resistance, etc., but they have the following disadvantages: 1. Large heat release during curing , the glue should not be too much at one time, and the construction time limit is short
2. The equivalent of active hydrogen is low, and the weighing of the paint must be accurate. Excessive or insufficient will affect the performance
3. Volatile, odorous and irritating, affecting the health of operators
5. High polarity, their miscibility with epoxy resin is not good, and it is easy to cause shrinkage cavity after curing of adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In a three-necked flask with stirring and a thermometer, add 15 parts of E-51 epoxy resin and 30 parts of benzyl alcohol. Start stirring, and heat the material to 50°C to prepare a modifier for use. In another four-neck flask equipped with a stirring device, a thermometer and a constant pressure dropping funnel, add 50 parts of aminoethylpiperazine and 5 parts of bisphenol A, start stirring, and heat the material to 50°C. After the bisphenol A is completely dissolved, the above-mentioned obtained materials are added dropwise through the constant pressure dropping funnel to react, and the dropping speed is controlled to make the reaction proceed at 50-60°C, and the dropwise addition is completed within 1-2 hours;

[0019] The performance indicators of the experimental results are: colorless clear liquid, viscosity (25°C, mPa·s) 330, amine value (mgKOH / g) 420. The active hydrogen equivalent is 94, and the amount of standard epoxy resin (EEW=190) in 100 grams is 46.

Embodiment 2

[0021] In a three-neck flask with stirring and a thermometer, add 15 parts of E-51 epoxy resin and 35 parts of benzyl alcohol. Start stirring, and heat the material to 50°C to prepare a modifier for use. In another four-neck flask equipped with a stirring device, a thermometer and a constant pressure dropping funnel, add 45 parts of aminoethylpiperazine and 5 parts of bisphenol A, start stirring, and heat the material to 50°C. After the bisphenol A is completely dissolved, the above-mentioned obtained materials are added dropwise through the constant pressure dropping funnel to react, and the dropping speed is controlled to make the reaction proceed at 50-60°C, and the dropwise addition is completed within 1-2 hours;

[0022] The performance indicators of the experimental results are: the obtained product is a light yellow clear liquid with a viscosity (25°C, mPa·s) of 360 and an amine value (mgKOH / g) of 370. The active hydrogen equivalent is 106, and the amount of standard e...

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Abstract

The invention relates to a modified alicyclic amine curing agent and a preparation method thereof. The modified alicyclic amine curing agent is prepared from an alicyclic amine curing agent, a self-made modifying agent and an accelerant. The curing agent is low in heat dissipation, low in toxicity, not prone to moisture absorption and whitening, and has good compatibility with epoxy resin. A curedproduct has smooth surface, high hardness and certain toughness, and the modified alicyclic amine curing agent is suitable for epoxy stone back nets.

Description

technical field [0001] The invention relates to an epoxy resin curing agent, in particular to a modified alicyclic amine curing agent and a preparation method thereof. Background technique [0002] Epoxy resin is an important variety in the field of synthetic resin, because it has a series of excellent properties, such as strong adhesion, small shrinkage, excellent mechanical properties, dielectric properties and heat resistance, and good chemical stability. , so it is widely used in electronics, adhesives, coatings, construction and many other production fields. [0003] Epoxy resin itself is a thermoplastic semi-finished product. To make the epoxy resin adhesive have excellent performance, it is necessary to cross-link the epoxy resin and the curing agent to form a network-like macromolecule. There are many types of curing agents for epoxy resins, commonly used are aliphatic polyamines such as ethylenediamine, diethylenetriamine, and triethylenetetramine, and aliphatic po...

Claims

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Application Information

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IPC IPC(8): C08G59/50
CPCC08G59/5026C08G59/5073
Inventor 袁媛彭发兰
Owner HUNAN MAGPOW ADHESIVE INDS
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