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Cardanol epoxy floor curing agent and preparation method thereof

A technology of cardanol epoxy flooring and epoxy flooring, applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., can solve problems such as poor impact resistance, insufficient toughness, easy cracking, etc., and achieve smoothness The effect of high strength, long pot life and wide range of mixing ratio

Inactive Publication Date: 2011-07-27
GUANGDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest weakness of epoxy resin is that it is brittle after curing, poor impact resistance and easy to crack, that is, insufficient toughness.

Method used

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  • Cardanol epoxy floor curing agent and preparation method thereof
  • Cardanol epoxy floor curing agent and preparation method thereof
  • Cardanol epoxy floor curing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] On the 500ml four-necked flask, equipped with stirrer, condenser, water separator, thermometer, constant pressure burette, according to the molar ratio of cardanol:aminomethyltrimethylcyclohexylamine:formaldehyde=1:1.1:1, Add 150g of cardanol and 72g of aminomethyltrimethylcyclohexylamine, stir evenly, weigh 36.4g of formaldehyde with a mass concentration of 37% to 40%, and drop it into the reactor at a rate of 5 seconds / drop, and control the feeding temperature at 60°C , after stirring evenly, raise the temperature to 90°C, keep it warm for 3 hours, then carry out vacuum dehydration, the pressure is 0.0098Mpa, the dehydration temperature is 70°C, and the dehydration is until no liquid evaporates. The amine value is 256 mgKOH / g, and the viscosity is 4852 mPa·s.

example 2

[0033] The device is the same as that in Example 1. Add 150 g of cardanol at a molar ratio of cardanol: methylcyclopentadiamine: formaldehyde=1:1.5:1.5, and drop 49.8 g of formaldehyde with a mass concentration of 37% to 40% into the reactor. 7 seconds / drop, stir evenly, add 110.6g of methylcyclopentadiamine dropwise, control the feeding temperature at 50°C, stir evenly and then raise the temperature to 85°C, keep it warm for 5h, then carry out vacuum dehydration, the pressure is 0.0095Mpa, and the dehydration temperature is 60°C. Dehydrate until no liquid evaporates. The amine value is 338 mgKOH / g and the viscosity is 3813 mPa·s.

example 3

[0035] The device is the same as that in Example 1, with a molar ratio of cardanol: 1,2-cyclohexanediamine: formaldehyde=1:1.2:1.3, adding 150 g of cardanol and 78 g of 1,2-cyclohexanediamine, stirring evenly, and weighing the mass concentration as 38.4g of 37%-40% formaldehyde is dropped into the reactor, the dropping speed is 9 seconds / drop, the temperature is controlled at 50°C, after stirring evenly, the temperature is raised to 80°C, kept for 3 hours, and then vacuum dehydration is carried out, the dehydration temperature is 80°C, and the pressure is 0.0095Mpa , dehydrate until no liquid evaporates. The amine value is 295 mgKOH / g, and the viscosity is 4274 mPa·s.

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Abstract

The invention discloses a cardanol epoxy floor curing agent and a preparation method thereof. Cardanol extracted from cashew shell oil which is a natural product serves as a raw material, and the cardanol with 15 long-chain hydrocarbyl substituents of carbon is reacted with alicyclic amine and a formaldehyde solution to prepare the cardanol epoxy floor curing agent, wherein the molar ratio of the cardanol to the alicyclic amine to the formaldehyde solution is 1:(1-1.5):(1-1.5); in the reaction, the cardanol is firstly added into a reactor, the formaldehyde solution is then added into the reactor for reaction, the alicyclic amine is dropwise added in the reactor, and the cardanol epoxy floor curing agent can be obtained after the material is discharged. In the invention, the synthesis is performed at low temperature; synthetic products have a longer application period; and alicyclics with higher rigidity and better stability are introduced in molecular structures of the products, therefore, an epoxy resin curing product has excellent mechanical properties.

Description

technical field [0001] The invention relates to a cardanol epoxy floor curing agent and a preparation method thereof. Background technique [0002] Epoxy resin is a kind of thermoplastic polymer prepolymer. The pure resin has almost no practical value. Only when the curing agent is added to make it transform into a three-dimensional network structure, the insoluble and infusible high polymer will appear. A series of excellent properties. Such as excellent mechanical properties, good electrical insulation properties, good corrosion resistance, low shrinkage, good chemical and thermal stability, high strength and high modulus, good bonding performance and excellent processing performance, etc., widely used in adhesives, electronics Instrumentation, light industry, construction, machinery, aerospace, coatings, bonding and electrical and electronic insulation, etc. Therefore, the curing agent plays a considerable role in the application of epoxy resin and the performance of th...

Claims

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Application Information

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IPC IPC(8): C08G59/62C07C215/50C07C213/08C09D163/00
Inventor 王飞镝赵科明邱清华叶炜洁贾德民郭宝春贾志欣张俊珩原霞
Owner GUANGDONG UNIV OF TECH
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