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Water-soluble polyimide resin solution, and preparation method thereof

A polyimide resin, water-soluble technology, applied in the field of preparation of water-soluble polyimide resin solution, can solve the problems of a large number of organic solvents, achieve the effect of reducing usage and improving safety

Active Publication Date: 2015-07-08
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that a large amount of organic solvent is needed when using polyamide resin in liquid form, the invention provides a water-soluble polyimide resin solution with low price and simple preparation process and its preparation method

Method used

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  • Water-soluble polyimide resin solution, and preparation method thereof
  • Water-soluble polyimide resin solution, and preparation method thereof

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preparation example Construction

[0023] See figure 2 The embodiment of the present invention further provides a preparation method of the water-soluble polyimide resin solution, including:

[0024] S1, mixing an organic solvent-based polyimide resin solution and an anionic surfactant to obtain a mixed solution, the organic solvent-based polyimide resin solution is composed of an organic solvent and a polyimide resin, and the anionic surface The mass of the active agent is 10%-55% of the mass of the polyimide resin; and

[0025] S2: Under stirring conditions, water is gradually added to the mixed solution for reaction until a transparent, uniform and stable water-soluble polyimide resin solution is obtained.

[0026] In the step S1, the organic solvent-based polyimide resin solution can be directly purchased from the market, or can be configured by itself. For self-preparation, the polyimide resin can be directly dissolved in the organic solvent to obtain the organic solvent polyimide resin solution. The organic ...

Embodiment 1

[0038] Weigh 30 g of an organic solvent polyimide resin solution with a solid content of 10%, the organic solvent is dimethylacetamide, add 3.3 g of sodium dodecylbenzene sulfonate, and stir for 1 hour to make it uniform. Obtain a transparent mixed liquid; add deionized water dropwise while stirring at a temperature of 30°C. The stirring speed is 200r / min. The mass of water added to the mixed liquid per minute is 0.3g. When 120g of water is added, a transparent, Uniform and stable water-soluble polyimide resin solution.

Embodiment 2

[0040] Weigh 30 g of an organic solvent polyimide resin solution with a solid content of 20%, the organic solvent is tetrahydrofuran, add 2.1 g of sodium dodecylbenzene sulfonate, stir for 3.5 hours to make it uniform, and obtain a transparent mixture Liquid; Add deionized water dropwise while stirring at a temperature of 50℃. The stirring speed is 500r / min. The mass of water added to the mixed solution per minute is 0.6g. When 70g of water is added, a transparent, uniform and stable Water-soluble polyimide resin solution.

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Abstract

The invention discloses a water-soluble polyimide resin solution and a preparation method thereof. The preparation method comprises following steps: an organic solvent type polyimide resin solution is mixed with an anionic surfactant so as to obtain a mixed solution, wherein the organic solvent type polyimide resin solution is composed of an organic solvent and polyimide resin, and the mass of the anionic surfactant accounts for 10 to 55% of the mass of polyimide resin; water is added into the mixed solution with stirring for reaction until the water-soluble polyimide resin solution is obtained, wherein, for each minute, the mass of added water accounts for 0.2 to 4% of the mass of the organic solvent type polyimide resin solution.

Description

Technical field [0001] The invention belongs to the technical field of chemical engineering, and specifically relates to a preparation method of a water-soluble polyimide resin solution. Background technique [0002] Polyimide resin refers to a type of high molecular polymer containing imide rings in the main chain, which has good high temperature resistance, mechanical properties, insulation properties, and electrical properties. With the rapid development of the aerospace and electronics industries, this high-performance polymer material has developed rapidly. At present, it has been widely used in aviation, aerospace, microelectronics, nanometer, liquid crystal, separation membrane, laser and other fields. Including plastics, composite materials, films, adhesives, fibers, foams, liquid crystal alignment agents, separation films, photoresists, etc., they are considered to be "problem-solving experts", and they believe that "without polyimide, there would be no The current micr...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08J3/09C08J3/07
CPCC08J3/07C08J3/095C08J3/096C08J2379/08C08L79/08
Inventor 王仁荣吴珍秦昀昌郝妮
Owner GOLD EAST PAPER JIANGSU
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