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A kind of preparation method of polyimide high polymer

A technology of polyimide and high polymer, which is applied in the field of preparation of polyimide high polymer, can solve the problems of high cost and cumbersome operation, and achieve the effects of reduced production cost, simplified feeding steps, and simple preparation method

Active Publication Date: 2017-12-22
SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to the preparation of a mixed solvent with a high boiling point, the one-step synthesis method also requires a suitable capping agent for the capping reaction. The operation is cumbersome and costly

Method used

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  • A kind of preparation method of polyimide high polymer
  • A kind of preparation method of polyimide high polymer
  • A kind of preparation method of polyimide high polymer

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Experimental program
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Effect test

Embodiment 1 to 3

[0033]In the four-necked flask equipped with mechanical stirring and condenser, add 38.4g trimellitic anhydride (TMA), 90mL 1-methyl-2-pyrrolidone, stir evenly at T1 temperature, after TMA is completely dissolved, add 0.75mL formic acid, Add 51g xylene diisocyanate (MDI) three times again, add 17g each time, the time interval is Δt, then, keep the temperature for a period of time at T2 temperature, and the time is recorded as t2; keep the temperature for a period of time at T3 temperature, and the time is recorded as t3; constant temperature at T4 temperature for a period of time, and the time is recorded as t4; constant temperature at T5 temperature for a period of time, time is recorded as t5, stop the reaction, cool and discharge, and the feed liquid is a dark brown transparent liquid.

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Abstract

The present invention relates to a kind of preparation method of polyimide high polymer, and trimellitic anhydride is dissolved in 1-methyl-2-pyrrolidone, then add xylylene diisocyanate and catalyst, adopt staged heating method to control the progress of reaction, The polyimide polymer is prepared, wherein the molar ratio of the trimellitic anhydride to the xylene diisocyanate is 1:1-1.2. The invention adopts a one-step synthesis method, selects a certain proportion of trimellitic anhydride and xylene diisocyanate in a suitable solvent, and under the action of a catalyst, heats up and reacts in a staged heating method to prepare polyimide. The preparation method is very simple, does not require harsh reaction conditions, too many reagents and experimental steps, and the molecular weight of the prepared polyimide can be adjusted by controlling the reaction temperature and time.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a polyimide polymer. Background technique [0002] With the rapid development of aerospace, electronic information, automobile industry, household appliances and many other technical fields, the requirements for materials are also getting higher and higher. High performance, multi-functionality, light weight and low cost have become the general direction of material development. Polyimide is a material with excellent comprehensive properties. It is a kind of polymer material with imide ring on the main chain. As the main chain contains aromatic rings, as an advanced composite material matrix, it has outstanding temperature resistance and excellent mechanical properties, and is currently one of the materials with the highest temperature resistance among resin-based composite materials. As an electronic information material, polyimid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10
Inventor 吴斌井丰喜顾健峰潘德忠夏智峰张春琪
Owner SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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