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Colorless transparent aromatic polyimide film and preparation method thereof

A polyimide film and aromatic primary amine technology, which is applied in the field of preparation of colorless and transparent organic polymer films, can solve the problems that have not yet been published in literature or patent reports, and achieve excellent dimensional stability and mild reaction conditions , the effect of simple operation

Active Publication Date: 2009-03-25
DONGHUA UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The molecular structure and preparation method of the colorless and transparent aromatic polyimide film disclosed by the present invention have not yet been published in the literature or patent reports

Method used

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  • Colorless transparent aromatic polyimide film and preparation method thereof
  • Colorless transparent aromatic polyimide film and preparation method thereof
  • Colorless transparent aromatic polyimide film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]440.5 grams (1.0 moles) of 2,2-bis[4-(2,4-diaminophenoxy)phenyl]propane and 23200 milliliters of N,N-dimethylacetamide were added to the reaction kettle, at room temperature Stir and dissolve completely, cool in an ice-water bath to 0°C, add 440.0 grams (2.0 moles) of tetrafluorophthalic anhydride, stir and react within the temperature range of 0°C-35°C, and continue to react for 0.5 hours after a homogeneous solution is formed , add 400.0 grams (1.0 moles) of 4,4'-bis(4-aminophenoxy) diphenyl sulfide, stir, after completely dissolving, cool to 0°C in an ice-water bath, add 1040.0 grams (2.0 moles) of 2, 2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride was stirred in the temperature range of 0°C-35°C, and after it was completely dissolved, the reaction was maintained for 5 hours to obtain a colorless and transparent homogeneous Viscous solution, filter, remove mechanical impurities, adjust viscosity, cast on a casting machine to form a film with a predetermined t...

Embodiment 2

[0046] 54.8 grams (0.1 mol) of 2,2-bis[4-(2,4-diaminophenoxy)phenyl]hexafluoropropane and 500 milliliters of N,N-dimethylformamide and 3000 milliliters of N- Add methyl-2-pyrrolidone into the reaction kettle, stir at room temperature, after completely dissolving, cool in an ice-water bath to 0°C, add 22.0 grams (0.1 moles) of tetrafluorophthalic anhydride and 14.8 grams (0.1 moles) of phthalic anhydride Formic anhydride, stirred and reacted within the temperature range of 0°C-35°C. After a homogeneous solution was formed, the reaction was continued for 2 hours, and 29.2 grams (0.1 moles) of 1,3-bis(4-aminophenoxy)benzene, 385.2 grams of (0.9 mol) 1,4-bis(2-trifluoromethyl-4-aminophenoxy)benzene, stirring, after completely dissolving, cooling to 0°C in an ice-water bath, adding 628.0 g (1.0 mol) 2,2- Bis[4-(3,4-dicarboxyphenoxy)phenyl]hexafluoropropane dianhydride and 31.0 grams (0.1 moles) of 3,3',4,4'-tetracarboxylic acid diphenyl ether dianhydride powder, in Stir in the tem...

Embodiment 3

[0049] 440.5 grams (1.0 moles) of 2,2-bis[4-(2,4-diaminophenoxy)phenyl]propane and 6000 milliliters of N,N-dimethylacetamide were added to the reaction kettle, at room temperature Stir and dissolve completely, cool in an ice-water bath to 0°C, add 440.0 grams (2.0 moles) of tetrafluorophthalic anhydride, stir and react within the temperature range of 0°C-35°C, and continue to react for 0.5 hours after a homogeneous solution is formed , to get A component.

[0050] 54.8 grams (0.1 moles) of 2,2-bis[4-(2,4-diaminophenoxy)phenyl]hexafluoropropane and 4000 milliliters of N,N-dimethylacetamide were added to the reactor, Stir at room temperature, after completely dissolving, cool in an ice-water bath to 0°C, add 16.6 grams (0.1 mole) of 4-fluorophthalic anhydride and 14.8 grams (0.1 mole) of phthalic anhydride, at a temperature of 0°C-35°C The reaction was stirred within a certain range, and after a homogeneous solution was obtained, the reaction was continued for 0.5 hours to obta...

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Abstract

The invention discloses a colorless and transparent aromatic polyimide film which has the general formula of molecular structure as follows; the preparation thereof includes: aromatic primary amine and aromatic acid anhydride with specific molecular structures are adopted for polymerization in a strong polar aprotic organic solvent system within the temperature range of 0 DEG C to 35 DEG C to prepare a colorless and transparent viscous polyamide acid solution with homogeneous phase. Viscosity adjustment, casting for forming the film, heating for rising temperature and solvent removal are carried out simultaneously when partial imidization reaction is carried out, and then demoulding and stretching, further deep thermal imidization and rolling are carried out to obtain the colorless and transparent aromatic polyimide film. No special production equipment is required by the invention so that production can be carried out on the conventional production line of the polyimide film and the polyimide film is applicable to industrialized production.

Description

technical field [0001] The invention relates to a preparation method of a colorless and transparent organic polymer film, in particular to a colorless and transparent aromatic polyimide film and a preparation method thereof. Background technique [0002] Polyimide is a kind of polymer with excellent comprehensive performance, which has excellent heat resistance, low temperature resistance, solvent resistance, self-lubricating property and flame retardancy. At the same time, it also has very good mechanical properties and Dielectric properties. Therefore, it is widely used in photovoltaic materials, nonlinear optical materials; high temperature resistant materials for spacecraft, satellites or space vehicles; advanced structural composite materials in aerospace, automobiles, electromechanical, etc.; Insulating materials, high temperature resistant adhesives, etc.; and FPC or PCB substrate materials in the field of electronic microelectronics, IC interlayer insulating materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08J5/18C08L79/08
Inventor 虞鑫海陈梅芳
Owner DONGHUA UNIV
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