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Cashew nut oil modified solid aromatic amine epoxy curing agent

An aromatic amine epoxy and cashew oil technology, which is applied in the chemical industry, climate sustainability, sustainable manufacturing/processing, etc., can solve the problems of complex post-processing, large energy consumption, loss of ethylenediamine, etc., and achieve post-processing Simplicity, energy saving, and increased toughness

Inactive Publication Date: 2010-10-06
徐州中研科技工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, because of the use of 37% formaldehyde aqueous solution, a large amount of water is introduced into the reaction system, which complicates the post-treatment of its products, consumes a lot of energy, and causes a large loss of ethylenediamine at the same time.

Method used

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  • Cashew nut oil modified solid aromatic amine epoxy curing agent
  • Cashew nut oil modified solid aromatic amine epoxy curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: first select raw materials: cashew nut oil, diaminodiphenylmethane and paraformaldehyde; wherein, cashew nut oil selects cardanol that has not been purified for use, and the content of main component cardanol is 60-80%; diaminodiphenyl Methyl methane, referred to as DDM in English, is solid, with a solid content greater than 97%, and its color is from light brown to light yellow; paraformaldehyde, selected as white particles, with a solid content greater than 98%; synthesized by Mannich reaction with benzene ring and Phenalkamines with long aliphatic chains;

[0013] Mannich reaction (Mannich reaction, referred to as Mann reaction), also known as amine methylation reaction, is the condensation of compounds containing active hydrogen (usually carbonyl compounds) with formaldehyde and secondary amines or ammonia to form β-amino ( Organic chemical reactions of carbonyl) compounds. The reaction of general aldimine with α-methylene carbonyl compound is also re...

Embodiment 2

[0020] Embodiment 2: The reaction device is as in Example 1. Add cashew nut oil from the feeding port, raise the temperature to about 40 degrees, add paraformaldehyde in batches, control the temperature below 65 degrees, add the time for 1 hour, wait until the paraformaldehyde is completely dissolved and raise the temperature to 90-95 degrees, stop heating, add Solid DDM, kept at constant temperature for 4 hours, and then vacuum dehydrated until five liquids flowed out. The added cashew nut oil is 75%; diaminodiphenylmethane is 20%; paraformaldehyde is 5%; the percentages mentioned are all mass percentages. Others are the same as in Example 1.

Embodiment 3

[0021] Embodiment 3: the added cashew oil is 60%; diaminodiphenylmethane is 25%; paraformaldehyde is 15%; the percentages mentioned are all mass percentages. Others are the same as in Example 1.

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Abstract

The invention relates to a cashew nut oil modified solid aromatic amine epoxy curing agent, belonging to epoxy curing agent. The cashew nut oil modified solid aromatic amine epoxy curing agent comprises the raw materials: 55-75% of cashew nut oil, 20-35% of diamino diphenyl methane and 5-15% of paraformaldehyde, and is prepared by the steps of: first, weighing the raw materials according to the mass ratio; adding the cashew nut oil into a reaction kettle, raising the temperature to 40 DEG C, and adding the paraformaldehyde; maintaining the temperature to be below 65 DEG C, adding the paraformaldehyde for 0.5-1h until the paraformaldehyde is completely dissolved; after the paraformaldehyde is completely dissolved, raising the temperature to 90-95 DEG C, adding the diamino diphenyl methane, and maintaining at the constant temperature for 3-4h; evenly stirring and mixing after the diamino diphenyl methane is dissolved; putting the evenly mixed synthetic substance into a vacuum furnace for vacuum dehydration, and generating water by separation reaction; and finally, detecting after cooling, and packaging. The cashew nut oil modified solid aromatic amine epoxy curing agent has the advantages that the cashew nut oil is natural plant and is not needed to be purified into cardanol, thus avoiding secondary pollution, protecting the environment and saving energy; and the curing agent contains no solvent, has no irritation, and is mild in heat emission and moderate in curing speed.

Description

technical field [0001] The invention relates to an epoxy curing agent, in particular to a cashew nut oil modified solid aromatic amine epoxy curing agent. Background technique [0002] Curing agent is an indispensable and important component in the application field of epoxy resin. Like epoxy resins, it determines the physical properties of the cured product. Among many epoxy resin curing agents, aliphatic amine curing agents are the most widely used and used in the largest amount. Because of their fast response and room temperature curing characteristics, they are widely used in adhesives, potting materials, coatings, Floor, etc. However, low-level aliphatic amines, such as: ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine and polyethylenepolyamine, have low relative molecular weight, high volatility, high toxicity, and great harm to the human body. ; and in the low-level aliphatic amine molecules, because there are more active hydrogens,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/62C08G2/30
CPCY02P20/10
Inventor 周伟周法现王东
Owner 徐州中研科技工业有限公司
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