Modified alicyclic amine curing agent and preparation method thereof

An alicyclic amine curing agent and modification technology, which is applied in the field of modified alicyclic amine curing agent and its preparation, can solve the problems of large heat release, large stimulation, large moisture absorption, etc., achieve low viscosity and improve operation sex, light color effect

Inactive Publication Date: 2013-07-31
程梦喜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]1. Low active hydrogen equivalent and large difference in proportion
[0005]2. Large heat release
[0006]3. Toxic and irritating
[0007]4. High moisture absorption
[0008]5. Highly polar, it will cause shrinkage cavity, orange peel and other defects on the cured surface
However, IPDA is expensive and not resistant to whitening, which greatly increases the cost after modification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In a three-necked flask equipped with a stirrer and a thermometer, 12 parts of epoxy resin and 51 parts of benzyl alcohol were added. Start the mixer and stir the material evenly for later use. Add 37 parts of 1,3-BAC to a four-necked flask with a stirring device, a thermometer, and a constant pressure dropping funnel, start the agitator, and heat the material to 60°C; add the material obtained in the first step through the dropping funnel for reaction , Control the rate of addition so that the reaction temperature is maintained at 60~70°C, and the dropwise addition is completed within 1~2h. Continue to react at 60~70°C for 1h, cool down and discharge. The resulting product is

[0033] Color: colorless or light yellow transparent liquid

[0034] Viscosity (25°C, mPa.s) 125

[0035] Amine value (mgKOH / g) 365

[0036] Active hydrogen equivalent (g / eq) 145

[0037] One hundred grams of standard epoxy resin (EEW=190g / eq) curing agent dosage is 50 grams.

[0038] The ...

Embodiment 2

[0040] In a three-neck flask with a stirrer and a thermometer, add 16 parts of epoxy resin and 42 parts of benzyl alcohol. Start the mixer and stir the material evenly for later use. Add 42 parts of 1,3-BAC to a four-necked flask with a stirring device, a thermometer, and a constant pressure dropping funnel, start the agitator, and heat the material to 60°C; add the material obtained in the first step through the dropping funnel for reaction , Control the rate of addition so that the reaction temperature is maintained at 60~70°C, and the dropwise addition is completed within 1~2h. Continue to react at 60~70°C for 1h, cool down and discharge. The resulting product is

[0041] Color: colorless or light yellow transparent liquid

[0042] Viscosity (25°C, mPa.s) 137

[0043] Amine value (mgKOH / g) 415

[0044] Active hydrogen equivalent (g / eq) 115

[0045] The amount of curing agent for 100 grams of standard epoxy resin (EEW=190 g / eq) is 55 grams.

[0046] The curing agent o...

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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 a product which is prepared by reaction of 37-42 parts of 1,3-hexamethylene dimethylamine (1,3-BAC), 12-16 parts of epoxy resin and 41-51 parts of benzyl alcohol in parts by weight; and the viscosity of the product at 25 DEG C is 100-200mPa.S, the amine value is 340-450mgKOH / g, and the active hydrogen equivalent is 100-145g / eq. The preparation method comprises the following steps of: adding the epoxy resin and the benzyl alcohol to a reactor, and uniformly stirring for standby application; adding the 1,3-BAC to another reactor, heating to 60 DEG C, then dropwise adding the previous materials to the 1,3-BAC for reaction, finishing dropwise addition at 60-70 DEG C within 1 to 2 hours, continuously reacting for 1 hours at 60-70 DEG C, and cooling and discharging. The modified alicyclic amine curing agent has low heat release and good compatibility with the epoxy resin and is difficult in moisture absorption and whitening; and after the epoxy resin is cured by the curing agent, the epoxy resin has a smooth surface without water waves and high glossiness and the like.

Description

technical field [0001] The invention belongs to the technical field of epoxy resin compositions, and in particular relates to a modified alicyclic amine curing agent and a preparation method thereof, which is characterized in that it replaces IPDA to prepare a low viscosity, and the modified alicyclic amine curing agent has no The characteristics of the solvent can replace IPDA as a curing agent. Background technique [0002] Epoxy resin is an important thermosetting plastic with excellent properties such as high bonding strength, small shrinkage, good dielectric properties and heat resistance, and is widely used in electronics, adhesives, coatings, construction, national defense and other fields . [0003] Epoxy resin endows epoxy resin paint with excellent properties, and epoxy resin must be cross-linked with curing agent to form molecules of network structure. There are many kinds of epoxy resin curing agents, commonly used aliphatic polyamines such as diethylenetriamin...

Claims

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Application Information

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IPC IPC(8): C08G59/50
Inventor 程梦喜
Owner 程梦喜
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