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Imine biatomic acid intermediate and its preparing method

A technology for dibasic acids and intermediates, applied in the field of online imine dibasic acid intermediates and its preparation, can solve problems such as incomplete cyclization, difficult reaction control, and many side reactions

Inactive Publication Date: 2005-12-21
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the many side reactions in this method, the reaction is difficult to control, the cyclization is not complete, and the product performance is not ideal.

Method used

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  • Imine biatomic acid intermediate and its preparing method
  • Imine biatomic acid intermediate and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Weigh 100 grams of 4,4'-diaminodiphenylmethane and 250 grams of acetone in a 400ml beaker in advance, and stir at room temperature until the 4,4'-diaminodiphenylmethane is completely dissolved to obtain diamine / Acetone solution for later use.

[0012] In a 1000ml three-necked reaction flask, weigh 208 grams of trimellitic anhydride and 450 grams of acetone, start stirring, raise the temperature to 40°C, and stir until the trimellitic anhydride is completely dissolved. Use the addition funnel to slowly drop the pre-prepared diamine / acetone solution to carry out the amidation reaction: cool with a cold water bath and control the addition rate so that the reaction temperature does not exceed 40°C. After the diamine / acetone solution is added, a pale yellow powdery solid is gradually formed, and the reaction is continued for 3 to 5 hours below 40°C. Then filter and dry in a centrifuge with a 200-300 mesh filter cloth.

[0013] Transfer the solid powder to a 1000ml three-n...

Embodiment 2

[0016] In Example 1, 100 grams of 4,4'-diaminodiphenylmethane is replaced with 101 grams of 4,4'-diaminodiphenylmethane, and the proportioning and process of the remaining raw materials are unchanged, and another A kind of imine dibasic acid involved in the present invention.

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Abstract

This invention involves a kind of linetype imine binary acid intermediate and its method of preparation, character of the intermediate is it contains imine ring structure, two terminal of the molecule are the carboxyl, can apply to improve the heat and chemical corrosion resistance of the basic resin or the binder, such as epoxy resin, polyester resin, alcohol acid resin, etc.. Its preparation method is simple and cost low.

Description

technical field [0001] The invention relates to a linear imine dibasic acid intermediate and a preparation method thereof. Background technique [0002] Basic resins such as epoxy, polyester, and alkyd are widely used in many industries such as chemical industry, electronics, electrical appliances, and construction. However, these resins have relatively low heat resistance, and the allowable long-term use temperature generally does not exceed 130°C. One of the methods currently used to improve the heat resistance of these resins is to directly react imine monomers with high heat resistance with these resins, and then introduce imine rings into macromolecules after further cyclization. Because this method has more side reactions, the reaction is more difficult to control, the cyclization is not complete, and the product performance is not ideal. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/48
Inventor 饶保林
Owner GUILIN UNIVERSITY OF TECHNOLOGY