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Preparation method of colorless DMP-30

A DMP-30, yellow technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of amino hydroxy compounds, etc., can solve the problems of limited application scope, easy to darken, easy to be oxidized, etc., to improve product quality , the effect of color improvement and yield improvement

Inactive Publication Date: 2016-10-12
岳阳中展科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The pure product of DMP-30 is a colorless liquid. Because it is a phenolic compound, it is easy to be oxidized, especially when heated, the color is more likely to become darker. During the production process, in order to control the moisture content, vacuum heating and dehydration are generally required. The product is easily yellow to yellow-brown. At present, the DMP-30 produced in China is generally yellow to yellow-brown, with poor quality. It can only be used for low-end epoxy resin products, and its application range is limited.

Method used

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  • Preparation method of colorless DMP-30

Examples

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Effect test

Embodiment 1

[0033] A preparation method of colorless DMP-30, it comprises the steps:

[0034] 1. Take the material, select yellow or yellow-brown DMP-30 product and sodium borohydride in a ratio of 1000:1.2 according to the mass ratio;

[0035] ②. Reaction, mix the DMP-30 selected in step ① with the reducing agent, heat to 40°C, replace the air with nitrogen, and react in a sealed chamber for 4 hours;

[0036] 3. Filtration, the mixed solution obtained in step 2. is filtered to obtain a slightly yellow or colorless DMP-30 product, and the yield of the product is 97%.

Embodiment 2

[0038] A preparation method of colorless DMP-30, it comprises the steps:

[0039] 1. Take the material, select yellow or yellow-brown DMP-30 product and sodium borohydride in a ratio of 1000:1.6 according to the mass ratio;

[0040] ②. For reaction, mix the DMP-30 selected in step ① with the reducing agent, heat to 45°C, replace the air with nitrogen, and react in a sealed chamber for 2 hours;

[0041] 3. Filtration, the mixed solution obtained in step 2. is filtered to obtain a slightly yellow or colorless DMP-30 product, and the yield of the product is 97%.

Embodiment 3

[0043] A preparation method of colorless DMP-30, it comprises the steps:

[0044] 1. Take the material, select yellow or yellow-brown DMP-30 product and sodium borohydride in a ratio of 1000:1 according to the mass ratio;

[0045] ②. For reaction, mix the DMP-30 selected in step ① with the reducing agent, heat to 60°C, replace the air with nitrogen, and react in a sealed chamber for 1 hour;

[0046] 3. Filtration, the mixed solution obtained in step 2. is filtered to obtain a slightly yellow or colorless DMP-30 product, and the yield of the product is 96%.

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Abstract

The present invention relates to the field of DMP-30 preparation, in particular to a preparation method of colorless DMP-30, which comprises the following steps: 1. taking material, selecting prepared yellow or yellow-brown DMP-30 product and reducing agent; 2. reacting , mixing the DMP-30 and reducing agent selected in step 1, and heating and stirring until the color is basically eliminated; 3, filtering, filtering the mixed solution obtained in step 2, to obtain a slightly yellow or colorless DMP-30 product; the present invention The purpose is to provide a preparation method of colorless DMP‑30, which can remove yellow or yellowish brown by a simple and easy-to-operate method to obtain a colorless or slightly yellow DMP‑30 product, improve the quality of the product, and further increase its application range.

Description

technical field [0001] The invention relates to the field of DMP-30 preparation, in particular to a preparation method of colorless DMP-30. Background technique [0002] DMP-30 is the abbreviation of 2,4,6-tris(dimethylaminomethyl)phenol. As a curing catalyst for thermosetting epoxy resin adhesives, it can greatly increase the reaction speed of curing agent and epoxy resin and reduce the curing temperature. It does not affect the physical and chemical properties of the adhesive; compared with other curing agents, it has good catalytic effect and complete reaction, and is generally suitable for low temperature, high temperature resistant and low molecular weight rubber modified epoxy adhesives and some special purposes and specialty craft adhesives. [0003] DMP-30 can also be used as a catalyst for isocyanate trimerization reaction, so that the reaction can be carried out quickly, and the highest reaction temperature can be reached in a short period of time to obtain a fina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C215/50C07C213/10
CPCC07C213/10C07C215/50
Inventor 余志良廖德仲
Owner 岳阳中展科技有限公司
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