Coated particles

一种粒子、被覆的技术，应用在环氧树脂胶、粘合剂类型、分散在不导电无机材料中的导电材料等方向，能够解决潜在性降低、固体状环氧树脂用固化剂凝聚等问题，达到凝聚少、优异耐酸酐性和耐溶剂性的效果

Active Publication Date: 2017-07-21
AJINOMOTO CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the epoxy resin composition contains an acid anhydride or an organic solvent, there is a problem that the acid anhydride or the organic solvent dissolves the curing agent for solid epoxy resin and the potential of the curing agent for solid epoxy resin decreases.
[0003] As a method of imparting latent properties to the curing agent, a method of treating the curing agent with a silane coupling agent such as γ-glycidoxypropyltrimethoxysilane has been studied (for example, Patent Document 1), but from the perspective of acid anhydride resistance and solvent resistance considerations still need to be improved
[0004] In addition, when a fine curing agent is processed by a dry processing method without using a solvent, there is also a problem that the solid epoxy resin curing agent aggregates.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0163] The imidazole adduct latent curing agent (Amicure PN-50J manufactured by Ajinomoto Fine Chemicals Co., Ltd., average particle Diameter 2.5μm, density 1.2g / cm 3 , specific surface area 2.0m 2 / g, d90 / d50=1.9) After 1000g pre-mixed for 2 minutes, add the alkoxy oligomer (containing glycidoxy propylene) dropwise to the curing agent in the mixing for 3 minutes based methoxy / ethoxysilyl resins, SiO 2 Amount: 39% by mass, X-41-1053 manufactured by Shin-Etsu Chemical Co., Ltd., viscosity (25° C.): 12 mm 2 / s, mass average molecular weight 3863) 200g. Then, the mixture was thoroughly mixed for 5 minutes, whereby coated particles A were obtained.

manufacture example 2

[0165] Coated particles B were obtained in the same manner as in Production Example 1, except that 200 g of a glycidoxy group-containing alkoxy oligomer (X-41-1053 manufactured by Shin-Etsu Chemical Co., Ltd.) was changed to 50 g.

manufacture example 3

[0167] Coated particles C were obtained in the same manner as in Production Example 1, except that 200 g of a glycidoxy group-containing alkoxy oligomer (X-41-1053 manufactured by Shin-Etsu Chemical Co., Ltd.) was changed to 10 g.

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Abstract

An object of the present invention is to provide curing agent composite particles for epoxy resin, which are less likely to aggregate, and are excellent in storage stability and solvent resistance. Coated particles of the present invention comprise (A) curing agent particles for epoxy resin, and (B) an alkoxy oligomer, wherein the surfaces of the curing agents for epoxy resin particle are coated with the alkoxy oligomer.

Description

technical field [0001] The present invention relates to coated particles containing (A) curing agent particles for epoxy resins and (B) an alkoxy oligomer that coats the surfaces of the curing agent particles for epoxy resins. Preferably, the present invention relates to coated particles having less aggregation and excellent acid anhydride resistance and solvent resistance. Background technique [0002] When using an epoxy resin composition containing a curing agent for solid epoxy resin as an adhesive, etc., in order to make the epoxy resin composition a stable single liquid, sufficient potential is required for the curing agent for solid epoxy resin. sex. Here, the latent property refers to the property of not showing the action as a curing agent at normal temperature, but acting as a curing agent when heated. If the curing agent for solid epoxy resins has insufficient potential, the curing reaction of the epoxy resin will proceed at room temperature, and the viscosity o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/40
CPCC08G59/40C08G59/5073C09K5/14H01B1/22C09J163/00
Inventor 田中孝幸佐藤江利子甲嶋裕二大桥润司
Owner AJINOMOTO CO INC
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