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Polyimide material and preparation method thereof

A technology of polyimide and polyamic acid is applied in the field of highly transparent polyimide material and its preparation, and achieves the effects of good solubility and high transparency

Inactive Publication Date: 2016-02-03
VALIANT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the Chinese patent document whose application publication number is CN104478788 (the name is a kind of transparent polyimide material and its preparation method, the inventor is Zhou Yusheng), using 2-(3,5-diaminophenyl)-4,5, 6,7-(tetrafluoroisoindoline)-1,3-diketone is used as one of the diamine monomers to obtain a transparent polyimide material, but because other aromatic diamine monomers used do not contain fluorine or Strong electron-withdrawing groups such as sulfone groups, so there is room for further optimization in transparency

Method used

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  • Polyimide material and preparation method thereof
  • Polyimide material and preparation method thereof

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Experimental program
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Embodiment 1

[0031] Embodiment 1 prepares highly transparent polyimide resin material

[0032] In this embodiment, the highly transparent polyimide resin material has the following structural formula:

[0033]

[0034] In the formula, n and m are positive integers greater than 15.

[0035] Under nitrogen protection, 13.45g (0.04mol) 2,2'-bis(trifluoromethyl)-4,4'-diaminodiphenyl ether, 1.3g (0.004mol) 2-(3,5-diamino Phenyl)-4,5,6,7-(tetrafluoroisoindoline)-1,3-dione was added to 90g of N-methylpyrrolidone, stirred at room temperature for 15min until a light yellow transparent solution was completely dissolved, and added to the system Add 7.76g (0.04mol) cyclobutanetetracarboxylic dianhydride, the system exotherms and becomes viscous, continue stirring at room temperature for 3 hours to obtain a light yellow polyamic acid solution with a solid content of 20%.

[0036] Add 80g of acetic acid to the polyamic acid solution obtained above, heat up to reflux for 10 hours for imidization, an...

Embodiment 2

[0041] Embodiment 2 prepares highly transparent polyimide resin material

[0042] In this embodiment, the highly transparent polyimide resin material has the following structural formula:

[0043]

[0044] In the formula, n and m are positive integers greater than 15.

[0045] Under nitrogen protection, 12.1g (0.036mol) 2,2'-bis(trifluoromethyl)-4,4'-diaminodiphenyl ether, 1.3g (0.004mol) 2-(3,5-diamino Phenyl)-4,5,6,7-(tetrafluoroisoindoline)-1,3-dione was added to 84.6g of N-methylpyrrolidone, and stirred at room temperature for 15 minutes until a light yellow transparent solution was completely dissolved. 7.76g (0.04mol) of cyclobutanetetracarboxylic dianhydride was added to the mixture, the system exothermic and became viscous, and continued to stir at room temperature for 3 hours to obtain a light yellow polyamic acid solution with a solid content of 20%.

[0046] 80 g of acetic acid was added to the polyamic acid solution obtained above, and the temperature was rais...

Embodiment 3

[0051] Embodiment 3 prepares highly transparent polyimide resin material

[0052] In this embodiment, the highly transparent polyimide resin material has the following structural formula:

[0053]

[0054] In the formula, n and m are positive integers greater than 15.

[0055] Under nitrogen protection, 12.8g (0.04mol) 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl, 1.3g (0.004mol) 2-(3,5-diaminobenzene base)-4,5,6,7-(tetrafluoroisoindoline)-1,3-dione was added to 87.4g of N-methylpyrrolidone, and stirred at room temperature for 15min until the light yellow transparent solution was completely dissolved. Add 7.76g (0.04mol) cyclobutanetetracarboxylic dianhydride, the system exotherms and becomes viscous, continue stirring at room temperature for 6 hours to obtain a light yellow polyamic acid solution with a solid content of 20%.

[0056] 80 g of acetic acid was added to the polyamic acid solution obtained above, and the temperature was raised to reflux for 10 hours for imi...

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Abstract

The invention relates to a polyimide material and a preparation method thereof. The polyimide material comprises diamine monomers, namely 2-(3,5-diaminophenyl)-4 and 5,6,7-(tetrafluorohydrazine isoindoline)-1,3-diketone. The preparation method comprises the steps of mixing the monomers and other aromatic diamines containing strong electron withdrawing groups, and then, reacting the mixture and fatty acid dianhydride to obtain polyimide. Fluorine atoms and the strong electron withdrawing groups are introduced to the structures of the diamine monomers, and meanwhile the diamines containing the strong electron withdrawing groups and the fatty acid dianhydride are used as polymerization monomers, so that the formation of intramolecular / intermolecular charge transfer complexes (CTC) is further inhibited, and the transparency of the polyimide is remarkably improved. The polyimide material prepared by using the preparation method has the advantages of high transparency, high glass transition temperature and favorable solubility and heat resistance and the like and has a wide application prospect in the relevant fields of flexible transparent substrates, flat panel displays and the like.

Description

technical field [0001] The invention relates to the field of polyimide and its preparation, in particular to a highly transparent polyimide material and its preparation method. Background technique [0002] In the Chinese patent document whose application publication number is CN104478788 (the name is a kind of transparent polyimide material and its preparation method, the inventor is Zhou Yusheng), using 2-(3,5-diaminophenyl)-4,5, 6,7-(tetrafluoroisoindoline)-1,3-diketone is used as one of the diamine monomers to obtain a transparent polyimide material, but because other aromatic diamine monomers used do not contain fluorine or Strong electron-withdrawing groups such as sulfone groups, so there is still room for further optimization in transparency. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a highly transparent polyimide material and a preparation method thereof in view of the deficiencies in the prior ar...

Claims

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Application Information

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IPC IPC(8): C08G73/10
Inventor 周雨生宗皎张梅崔秉钧李士东胡葆华
Owner VALIANT CO LTD
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