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Preparation method of linear polyimide-maleimide copolymer film containing active groups

A technology of maleimide copolymer and maleimide resin, which is applied in the field of preparation of polyimide film, can solve the problem that it is difficult to prepare high molecular weight polyimide resin, which has not yet been published in the literature or Problems such as patent reports, comprehensive performance decline of film products, etc., to achieve excellent dimensional stability, molecular weight control, and low cost effects

Inactive Publication Date: 2012-07-04
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Its shortcoming is: (1) used raw material 2,2-bis(3,4-dicarboxyphenyl) hexafluoropropane dianhydride monomer is extremely expensive, causes the cost of film product to be very high, has seriously hindered its further popularization and application; ( 2) Due to the low reactivity of 2,2-bis(3,4-dicarboxyphenyl) hexafluoropropane dianhydride monomer and aromatic dibasic primary amine, it is difficult to prepare high molecular weight polyimide resin, Therefore, the overall performance of its film products is greatly reduced, especially its mechanical properties.
[0009] The preparation method of the active group-containing linear polyimide-maleimide copolymer and its film disclosed by the present invention has not yet been published in the literature or patent reports

Method used

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  • Preparation method of linear polyimide-maleimide copolymer film containing active groups
  • Preparation method of linear polyimide-maleimide copolymer film containing active groups
  • Preparation method of linear polyimide-maleimide copolymer film containing active groups

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 21.6 grams (0.1 mol) of 3,3'-diamino-4,4'-dihydroxybiphenyl containing hydroxyl aromatic dibasic primary amine and 432.0 grams of N,N-dimethylacetamide strongly polar aprotic Add the organic solvent into the polymerization bottle, stir at room temperature, after completely dissolving, cool in an ice-water bath to below 5°C, add 10.9 grams (0.05 moles) of pyromellitic dianhydride and 15.5 grams (0.05 moles) of 3,3′,4, Aromatic dibasic acid anhydride of 4'-tetracarboxydiphenyl ether dianhydride, stirred, and reacted for 3 hours at a temperature range of 5°C-10°C, to obtain a homogeneous, transparent, viscous hydroxyl-containing aromatic polyamide Acid resin solution, solid content is 10wt%, is recorded as HPAA-1 resin solution;

[0033] 72.0 grams of 1,4-bis(2,4-dimaleimidophenoxy)benzene, 100.0 grams of 2,2-bis[4-(4-maleimidophenoxy)benzene Base] propane and the maleimide resin of 20.0 grams of 4,4'-bismaleimidodiphenylmethane were dissolved in 768.0 grams of N, N-dimet...

Embodiment 2

[0036] 21.6 grams (0.1 moles) of 3,3'-diamino-4,4'-dihydroxybiphenyl and 36.6 grams (0.1 moles) of 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane The strong polar aprotic organic solvent containing hydroxyl aromatic dibasic amine and 277.2 grams of N-methyl-2-pyrrolidone and 300.0 grams of N, N-dimethylacetamide is added to the polymerization bottle, stirred at room temperature, completely After dissolving, cool in an ice-water bath to below 5°C, add 43.6 grams (0.2 moles) of pyromellitic dianhydride as an aromatic dibasic acid anhydride, stir, and react within the temperature range of 5°C-10°C for 3 hours to obtain homogeneous Phase, transparent, viscous hydroxyl-containing aromatic polyamic acid resin solution, with a solid content of 15wt%, is recorded as HPAA-2 resin solution;

[0037] Dissolve the maleimide resin of 21.0 grams of 4,4'-bismaleimido-diphenylmethane in 49.0 grams of N-methyl-2-pyrrolidone strong polar aprotic organic solvent, stirring and dissolving at ro...

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Abstract

The invention relates to a preparation method of a linear polyimide-maleimide copolymer film containing active groups, which comprises the following steps of: (1) adding hydroxyl-contained aromatic di-primary amine and a strongly-polar aprotic organic solvent into a polymerization bottle, stirring at room temperature, cooling to the temperature below 5 DEG C through an ice-water bath, adding aromatic binary anhydride, stirring, and reacting to obtain a hydroxyl-contained aromatic polyamic acid resin solution; (2) dissolving maleimide resin into the strongly-polar aprotic organic solvent, and stirring and dissolving at the room temperature to obtain a maleimide resin solution; and (3) uniformly mixing the two solutions at the room temperature, regulating the viscosity, forming a film in a casting machine, carrying out chemical reactions, such as dehydrated thermal imidization, copolymerization and the like, cooling and de-filming to obtain the film. The preparation method has the advantages of mild reaction conditions, simple operation, low cost and environmental protection, is beneficial to realizing industrialized large-scale production and can be applied to high-technology fields of large-motor main insulating materials, electromagnetic wire-wound electric insulating materials, flexible copper-clad laminates and the like.

Description

technical field [0001] The invention belongs to the field of preparation of polyimide films, in particular to a preparation method of linear polyimide-maleimide copolymer films containing active groups. Background technique [0002] Polyimide film is a kind of polymer material with excellent comprehensive properties. It has particularly excellent heat resistance, low temperature resistance, flame retardancy, electrical properties and mechanical properties. It is widely used in electronic microelectronics, printing High-tech fields such as circuit boards, wires and cables, motor main insulation, shipping, aerospace, lasers, and optoelectronics. [0003] However, traditional polyimide films, such as the KAPTON film produced by the American DUPONT company and the domestic H film, have a molecular structure of pyromellitic dianhydride, that is, the main monomer raw material is pyromellitic acid di anhydride and 4,4'-diaminodiphenyl ether. [0004] NASA (NASA) plans to launch t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08J5/18C08G73/12
Inventor 虞鑫海陈梅芳
Owner DONGHUA UNIV
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