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Plant polyene phenolic aldehyde amine epoxy curing agent based on hexamethylenetetramine and preparation method thereof

A hexamethylenetetramine and phenalkamine epoxy technology, which is applied in the field of plant polyene phenalkamine epoxy curing agent and its preparation, can solve the problems of easy volatility, high irritation, and unsatisfactory curing effect of the curing agent. , to achieve the effect of less amine-containing wastewater and easy treatment

Pending Publication Date: 2021-09-07
常熟耐素生物材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditionally used paraformaldehyde and formaldehyde aqueous solution are volatile, highly irritating, and easy to cause cancer
At the same time, in order to control the material viscosity of the finished product, amine raw materials are generally used in excess, and finally vacuumed out, resulting in a large amount of amine-containing wastewater, most of which cannot be recycled, and the curing effect of the produced curing agent is not ideal.

Method used

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  • Plant polyene phenolic aldehyde amine epoxy curing agent based on hexamethylenetetramine and preparation method thereof
  • Plant polyene phenolic aldehyde amine epoxy curing agent based on hexamethylenetetramine and preparation method thereof
  • Plant polyene phenolic aldehyde amine epoxy curing agent based on hexamethylenetetramine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Put 600g of plant polyenol, 102g of pentamethylenediamine, and 12g of water into a 1L four-neck flask equipped with a stirring device, start stirring, condense and reflux, raise the temperature to 70°C, and slowly add 56g of hexamethylenetetramine. After the addition, the temperature was slowly raised to 95°C, and kept at reflux at 95°C for 3 hours. Slowly raise the temperature to 145°C, heat preservation and recovery for 3 hours. Discharge after cooling to normal temperature.

Embodiment 2

[0052] Put 600g of plant polyenol, 153g of pentamethylenediamine, and 26g of water into a 1L four-neck flask equipped with a stirring device, start stirring, condense and reflux, raise the temperature to 70°C, and slowly add 70g of hexamethylenetetramine. After the addition, the temperature was slowly raised to 95° C. and kept at reflux for 3 hours. Slowly raise the temperature to 145°C and recover for 3 hours with heat preservation. Discharge after cooling to normal temperature.

Embodiment 3

[0054] Put 600g of plant polyenol, 204g of pentamethylenediamine, and 46g of water into a 1L four-neck flask equipped with a stirring device, start stirring, condense and reflux, raise the temperature to 70°C, and slowly add 98g of hexamethylenetetramine. After the addition, the temperature was slowly raised to 95° C. and kept at reflux for 3 hours. Slowly raise the temperature to 145°C and recover for 3 hours with heat preservation. Discharge after cooling to normal temperature.

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Abstract

The invention discloses a plant polyene phenolic aldehyde amine epoxy curing agent based on hexamethylenetetramine, which is characterized by comprising the following components in parts by weight: 50-80 parts of plant polyene phenol; 5-15 parts of hexamethylenetetramine; 10-30 parts of amine; and 1-5 parts of water. The invention also discloses a preparation method of the curing agent . According to the invention, hexamethylenetetramine is used for replacing paraformaldehyde, hexamethylenetetramine is a white crystal, is small in smell, is small in pollution in a use process, and is hydrolyzed to generate formaldehyde and ammonia gas, and the ammonia gas is dissolved in water to form ammonia water which can be used as an amine raw material. The water generated by the condensation reaction continues to participate in the hydrolysis reaction of hexamethylenetetramine while the use of amine substances is reduced, and the generated water is basically consumed by the reaction.

Description

technical field [0001] The invention relates to the field of preparation of phenalkamine epoxy curing agents, in particular to a plant polyene phenalkamine epoxy curing agent based on hexamethylenetetramine and a preparation method thereof. Background technique [0002] The phenolic raw materials of the existing phenalkamine epoxy curing agents are mostly phenol, cardanol, nonylphenol, etc., and the amine raw materials are mostly aliphatic amines, alicyclic amines, aromatic amines and modified amines. . Most of the raw materials of aldehydes are paraformaldehyde. [0003] The main reason is that the combination of different above-mentioned raw materials will endow the curing agent with different properties and expand the market application range of the product. [0004] However, the traditionally used paraformaldehyde and formaldehyde aqueous solution are volatile, highly irritating, and easy to cause cancer. At the same time, in order to control the material viscosity of...

Claims

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Application Information

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IPC IPC(8): C07C215/50C07C213/02C08G59/62
CPCC07C215/50C08G59/623
Inventor 蔡秀刚戴志成张文鹏顾斌
Owner 常熟耐素生物材料科技有限公司