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Anti-oxidation method of hardener

An anti-oxidation and hardening agent technology, which is applied in the field of anti-oxidation methods and preparations of hardeners, can solve the problems of high toxicity, low yellowing, and strong volatility of basic amines, and achieve low toxicity, low exothermic peak temperature, and reaction The effect of low activity

Inactive Publication Date: 2019-11-26
黄兆达
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the present invention uses an alicyclic amine curing agent that is not easy to yellow as a raw material, and after modification with epoxy resin, it can improve the defects of strong volatility, high toxicity, and strict proportioning of basic amines, and at the same time , the basic amine used for modification only chooses alicyclic amine curing agent. Compared with aliphatic amine, aromatic amine and other curing agents, the products modified by alicyclic amine have remarkable yellowing resistance, gloss, strength, etc. promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 493g of isophoronediamine, add 430g of benzyl alcohol into a three-necked flask, start stirring, control the speed at 100-200 rpm, raise the temperature to 40-45°C, slowly add 185g of E51 epoxy resin, and control the reaction temperature at 40 ~50°C, the addition time is controlled for 1-2 hours, after the addition is complete, raise the temperature to 60-70°C, continue to stir for 2-4 hours, add 20g of light stabilizer 770, 30g of ultraviolet absorber UV-329, stir to dissolve, continue to stir After 1-2 hours, the temperature is lowered to 40-50°C, and the product is obtained after discharging. The prepared product is cured at 25°C to cure the epoxy resin. After 12 hours, the adhesive layer is colorless and transparent, with a bright surface and high strength. There is no obvious yellowing after 8 hours of ultraviolet light irradiation, and the oxidation resistance is strong.

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PUM

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Abstract

The invention discloses an anti-oxidation method of a hardener. The hardener is mainly prepared from raw materials comprising bisphenol A epoxy resin, an alicyclic amine curing agent, a diluent, an antioxidant and the like by a reaction, wherein the curing agent is the alicyclic amine curing agent. After the hardener produced by the method is used for curing epoxy resin, the cured epoxy resin hasthe characteristics of excellent yellowing resistance, good toughness, high hardness and the like. The hardener is simple in synthesis process, can meet the fields of ornament glue, stone glue, crystal glue, handicraft adhesion and the like, and is a novel antioxidant hardener capable of obviously improving yellowing resistance of epoxy compositions.

Description

technical field [0001] The invention relates to a curing agent, in particular to an anti-oxidation method of a curing agent capable of rapid curing in a low-temperature environment and a preparation method thereof. Background technique [0002] Curing agent, also known as hardening agent, curing agent or stabilizer, is a kind of substance or mixture that promotes or controls the curing reaction. Resin curing is through chemical reactions such as condensation, ring closure, addition or catalysis, so that the thermosetting resin undergoes an irreversible change process, and curing is completed by adding a curing (crosslinking) agent. Curing agent is an essential additive, whether it is used as adhesives, coatings, or castables, it is necessary to add a curing agent, otherwise the epoxy resin cannot be cured. The variety of curing agent has a great influence on the mechanical properties, heat resistance, water resistance and corrosion resistance of the cured product. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50
CPCC08G59/5026
Inventor 黄兆达
Owner 黄兆达