Compound 1, 5-trimellitic anhydride glutarate and compounding method thereof

A technology of pentadiyl trimellitic anhydride and trimellitic anhydride acid chloride, which is applied in the direction of organic chemistry, can solve the problems of adverse effects on various properties of materials, poor molding processability, high curing temperature, etc., and achieve the maintenance of mechanical properties and thermal stability, and good heat resistance Sexuality and electrical performance, the effect of short working hours

Inactive Publication Date: 2017-03-29
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When trimellitic anhydride is used alone as an epoxy resin curing agent, the curing temperature is too high, and the curing temperature ranges from 180 to 200 ° C. The molding process of the material is poor, and it will adversely affect the properties of the material.

Method used

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  • Compound 1, 5-trimellitic anhydride glutarate and compounding method thereof
  • Compound 1, 5-trimellitic anhydride glutarate and compounding method thereof
  • Compound 1, 5-trimellitic anhydride glutarate and compounding method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Compound 1,5-pentamellitic anhydride, its molecular structural formula is as follows:

[0028]

[0029] The synthetic method of above-mentioned compound 1,5-pentamellitic anhydride, concrete steps are as follows:

[0030] (1) Prepare ice salt according to the mass ratio of ice: calcium chloride hexahydrate = 100:20, and take trimellitic anhydride acid chloride, 1,5-pentanediol, DBU, and solvent 1,2-di Ethyl chloride is 5 times the volume of the reactant;

[0031] Put the weighed trimellitic anhydride acid chloride into the solvent ethyl acetate, start the magnetic stirrer, first dissolve the trimellitic anhydride acid chloride in ethyl acetate, then place the weighed 1,5-pentanediol in the dropper, slowly drop it within 25min After completion, the reaction solution was obtained; DBU was added to the above reaction solution within 30 minutes, and then the reaction temperature was controlled at -5 to 0°C (the reaction was carried out in an ice-salt bath environment to...

Embodiment 2

[0039] The synthetic method of compound 1,5-pentamellitic anhydride, concrete steps are as follows:

[0040] (1) Prepare ice salt according to the mass ratio of ice: sodium chloride = 100:33, and take trimellitic anhydride acid chloride, 1,5-pentanediol, and pyridine in a molar ratio of 1:0.4:2; the solvent is ethyl acetate as the reactant 7 times the volume;

[0041] Put the weighed trimellitic anhydride acid chloride into the solvent dimethyl sulfoxide, start the magnetic stirrer, first dissolve the trimellitic anhydride acid chloride in dimethyl sulfoxide; then put the weighed 1,5-pentanediol and pyridine into the dropper Shake well, slowly drop into the reaction system within 30 minutes, then control the reaction temperature at -5~0°C (the reaction is carried out in an ice-salt bath environment to maintain the low temperature required for the reaction), react for 4 hours, the reaction system is white paste, That is, the crude product of pentamethylene ditrimellitic anhydr...

Embodiment 3

[0045] The synthetic method of compound 1,5-pentamellitic anhydride, concrete steps are as follows:

[0046](1) According to the mass ratio of ice:ammonium nitrate=100:10, ice salt is prepared, and the molar ratio is 1:0.5:2.5 to get trimellitic anhydride acid chloride, 1,5-pentanediol, ammonia water (28wt%), and the solvent dichloromethane is 8 times the volume of the reactant;

[0047] Put the weighed trimellitic anhydride acid chloride into the solvent methylene chloride, start the magnetic stirrer, first dissolve the trimellitic anhydride acid chloride in the methylene chloride, then place the weighed 1,5-pentanediol in the dropper, and slowly drop it within 15 minutes After completion, the reaction solution is obtained; put ammonia water into the above reaction solution, and then add ice salt to the water bath to control the reaction temperature at -5 ~ 0°C, and react for 5 hours. The resulting solution is white, which is 1,5-dimellitate anhydride crude product;

[0048...

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Abstract

The invention discloses a compound of 1, 5-trimellitic anhydride glutarate and compounding method thereof. The molecular structural formula is shown as follows and prepared by reacting trimellitic anhydride chloride with 1, 5-pentylene glycol under the conditions of ice-salt bath, alkali and solvent at constant temperature. The 1, 5-trimellitic anhydride glutarate contains two equivalents of anhydride groups for curing epoxy resin and a flexible structure; compared with existing anhydride curing agent and under the condition of equal applied equivalents of curing agent, the 1, 5-trimellitic anhydride glutarate can shorten curing time, reduce curing temperature and maintain existing mechanical performance and thermal stability.

Description

technical field [0001] The invention belongs to a novel epoxy resin curing agent, in particular to a compound 1,5-pentamellitic anhydride and a synthesis method thereof. Background technique [0002] As an epoxy resin curing agent, trimellitic anhydride has excellent heat resistance, electrical properties, mechanical properties and chemical resistance. It has been used abroad for heat-resistant insulating laminates, heat-resistant cable insulating varnishes, powder coatings and in the casting material. When trimellitic anhydride is used alone as a curing agent for epoxy resin, the curing temperature is too high, and the curing temperature ranges from 180 to 200°C. The molding process of the material is poor, and it will adversely affect the various properties of the material. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide the compound 1,5-pentamellitic anhydride and its synthesis method for the deficiencies in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/89C08G59/42C08G59/68C08K7/14
CPCC07D307/89C08G59/4223C08G59/686C08K7/14
Inventor 彭永利黄恒宇孙勇
Owner WUHAN INSTITUTE OF TECHNOLOGY
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