Modified alicyclic amine type epoxy resin latent curing agent and accelerator and preparation method thereof

A latent curing agent, epoxy resin technology, applied in the direction of organic chemistry, etc., to achieve the effect of easy availability of materials, simple reaction equipment and process, and increased bonding strength

Active Publication Date: 2018-08-10
广东固研电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is no report on the use of aromatic isocyanate modified cycloaliphatic amines as latent curing agents or accelerators for epoxy resins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 120

[0018] Example 1 20g of N-methylpiperazine and 37.4g of dimethyl sulfoxide were mixed, 17.4g of toluene diisocyanate was added at room temperature, then the temperature was raised to 60°C for 2 hours, the filter cake was vacuum-dried, and finally pulverized into D90 It is 5~10um micro powder.

Embodiment 2

[0019] Example 2 25g of diphenylmethane diisocyanate and 42g of methylcyclohexane were mixed, heated to 50°C to dissolve, then 17g of hexahydropyridine was added, the temperature did not exceed 60°C, after 5 hours of reaction, suction filtration, filtration The cake is vacuum-dried and pulverized into micropowder with D90 of 5-10um.

Embodiment 3

[0020] Example 3 12g of phenyl isocyanate was dissolved in 22g of tetrahydrofuran, 10g of N-methylpiperazine was added at room temperature, then the temperature was raised to 60°C for reaction for 3 hours, suction filtered, the filter cake was vacuum-dried, and pulverized to a D90 of 5~ 10um powder.

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PUM

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Abstract

The invention discloses a modified alicyclic amine type epoxy resin latent curing agent or accelerant and a preparation method thereof. The latent curing agent is prepared through steps as follows: aromatic isocyanate and alicyclic amine in a reactant equivalence ratio being 1:1 have a reaction in a solvent for 2-10 h at the temperature ranging from normal temperature to 60 DEG C, a product is filtered, dried and smashed, and the latent curing agent is prepared. According to the method, utilized materials are simple and available, reaction equipment and technology are simple and normalized, the prepared latent curing agent or accelerant can realize curing at the medium and low temperature and has excellent bonding strength, the working life of the prepared latent curing agent or accelerant is long, the curing temperature is low, and the storage property of the prepared latent curing agent or accelerant is not affected by the solvent.

Description

technical field [0001] The invention relates to a latent curing agent and accelerator and a preparation method thereof, in particular to a latent curing agent and accelerator of a modified alicyclic amine type epoxy resin and a preparation method thereof, belonging to the technical field of organic synthesis. Background technique [0002] Epoxy resins are widely used in industrial and civil fields, such as electronic appliances, aerospace and building reinforcement, and can be made into adhesives, coatings, inks, circuit boards and composite materials. However, epoxy resin is a hot-melt substance, which must be mixed with a curing agent to cure into an insoluble network material with certain mechanical strength to have application value. Commonly used curing agents are amines, acid anhydrides and imidazoles. These curing agents must be used within a short period of time after mixing with epoxy resins, otherwise they will quickly gel and become unusable. To overcome these sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/40C08G59/56C07D295/215
CPCC07D295/215C08G59/4057C08G59/56
Inventor 康富春唐增花刘海明
Owner 广东固研电子材料有限公司
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