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n,n' alkylated diaminodicyclohexylmethane curing agent and preparation method

A technology of alkylating diaminodicyclohexylmethane and curing agent, which is applied in the preparation of amino-substituted functional groups, organic chemistry, etc., and can solve problems such as easy twists and turns, failure to meet extreme environmental requirements, and insufficient toughness of epoxy resins. To achieve the effect of enhancing toughness

Active Publication Date: 2020-06-09
本源精化环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of N,N' alkylated diaminodicyclohexylmethane curing agent and its preparation method, aiming to solve the problem of diaminodicyclohexylmethane in the prior art. The epoxy resin and other materials produced by the curing agent have insufficient toughness, are prone to twists and turns, and cannot meet the requirements of extreme environments.

Method used

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  • n,n' alkylated diaminodicyclohexylmethane curing agent and preparation method

Examples

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Effect test

Embodiment 1

[0047] Example 1: Preparation of N,N'-dimethyl-4,4-diaminodicyclohexylmethane

[0048] In a 1L autoclave, add 105g (0.5 mol) of 4,4-diaminodicyclohexylmethane, add 142g (1 mol) of iodomethane, heat and stir to dissolve, add 400g of dioxane, and add macroporous strong basic anion Exchange resin (D201) 6g, close the autoclave, pass N 2 Replaced 3-5 times, started to raise the temperature to 50°C, controlled the pressure of the reaction system to about 1 MPa, stirred and reacted for 2 hours, fractionated, and the yield of the product N,N'-dimethyl-4,4-diaminodicyclohexylmethane was 99%.

Embodiment 2

[0049] Example 2: Preparation of N,N'-diethyl-4,4-diaminodicyclohexylmethane

[0050] In a 1L autoclave, add 105g (0.5 mole) of 4,4-diaminodicyclohexylmethane, add 156g (1 mole) of iodoethane, heat and stir to dissolve, add 400g of dioxane, and add macroporous strong alkali Anion exchange resin (D201) 6g, close the autoclave, pass N 2 Replaced 3-5 times, started to raise the temperature to 70°C, controlled the pressure of the reaction system to about 1.5 MPa, stirred and reacted for 2 hours, and fractionated, the yield of the product N,N'-diethyl-4,4-diaminodicyclohexylmethane was 97%.

Embodiment 3

[0051] Example 3: Preparation of N,N'-dibutyl-4,4-diaminodicyclohexylmethane

[0052] In a 1L autoclave, add 105g (0.5 moles) of 4,4-diaminodicyclohexylmethane, add 202.4g (1.1 moles) of iodobutane, add 300g of dioxane, heat and stir to dissolve, add macroporous strong base Anion exchange resin (D201) 12g, close the autoclave, pass N 2 Replaced 3-5 times, started to raise the temperature to 100°C, controlled the pressure of the reaction system to about 3 MPa, stirred and reacted for 3 hours, fractionated, and the yield of the product N,N'-dibutyl-4,4-diaminodicyclohexylmethane was 95%.

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Abstract

The invention discloses a N,N' alkylated diamindicyclohexylmethane curing agent and a preparation method thereof. The N,N' alkylated diamindicyclohexylmethane curing agent has a structural formula as shown in the description. The curing agent is prepared from a compound a and a compound b through SN2 nucleophilic substitution reaction; the compound a is diaminodicyclohexylmethane and a homolog thereof; the compound b is alkyl halide; the curing agent prepared by the reaction significantly enhances the toughness of epoxy resin obtained by curing and other materials and has the advantages that the compound performance is high, and the requirements for use in multiple extreme environments are met; the preparation reaction is very easy to carry out, and the reaction operability is stronger, so that raw materials are significantly saved, the yield is improved, and the cost is reduced; and hydrogen gas and other dangerous gases are not involved in the production, and no high-risk potential safety hazard exists, and therefore, the N,N' alkylated diaminodiphenyl methane curing agent is more energy-saving and environmentally-friendly and more suitable for industrialization.

Description

technical field [0001] The invention relates to the technical field of curing agents, in particular to an N,N' alkylated diaminodicyclohexylmethane curing agent and a preparation method. Background technique [0002] As a thermosetting plastic with excellent comprehensive properties, epoxy resin is widely used in many fields such as coatings, civil engineering, automobiles, factory equipment, ships, and containers. Curing agent is one of the main components in the preparation of epoxy resin, and the quality of the curing agent has an important impact on the performance of the resin. According to different chemical composition and application, curing agent can be divided into aromatic amine curing agent, aliphatic amine curing agent, amidoamine curing agent, latent curing amine curing agent, urea substitute curing agent and so on. Different types of curing agents have different properties and are used in different industries. Among them, the aliphatic amine curing agent has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/50C07C209/08C07C211/36
CPCC07C209/08C08G59/5026C07C211/36
Inventor 赵智全范丽芬
Owner 本源精化环保科技有限公司