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Polyimide polymer, transparent polyimide thin film and preparation method of transparent polyimide thin film

A technology of transparent polyimide and polyimide, applied in the fields of polyimide polymer, transparent polyimide film and preparation thereof, can solve the problems of poor flexibility of transparent polyimide film, etc. Improved optical transmittance, good flex resistance, and high heat resistance

Inactive Publication Date: 2017-12-12
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of poor flexibility of the existing transparent polyimide film, the invention provides a polyimide polymer, a transparent polyimide film and a preparation method thereof

Method used

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  • Polyimide polymer, transparent polyimide thin film and preparation method of transparent polyimide thin film
  • Polyimide polymer, transparent polyimide thin film and preparation method of transparent polyimide thin film
  • Polyimide polymer, transparent polyimide thin film and preparation method of transparent polyimide thin film

Examples

Experimental program
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Effect test

Embodiment 1

[0132] Add 16.0115g (50mmol) 4,4'-diamino-2,2'-bistrifluoromethylbiphenyl monomer, 100mL N,N-dimethylacetamide in a dry and clean 250mL three-necked flask, Stir at room temperature under protection, and after the diamine monomers are completely dissolved, slowly add 4.0232g (10mmol) of triphenyldiethene tetracarboxylic dianhydride monomer, 16.8811g (38mmol) of 3,3',4,4'-biphenyl tetra Formic dianhydride monomer, 45mL N,N-dimethylacetamide, react at room temperature for 6 hours, add 0.59g (4mmol) phthalic anhydride monomer, react at room temperature 4 to obtain a polyamic acid solution, filter, and vacuum defoam , and then coated on a dry and clean glass plate to form a film, put it on a heating plate at 80 ° C for 30 minutes, dry it in a blast oven at 360 ° C for 2 hours, take it out of the oven after cooling, and put it into boiling hot water until the colorless transparent polyimide film was removed from the glass plate to obtain a transparent polyimide film with a thickness...

Embodiment 2

[0134] Add 16.0115g (50mmol) 4,4'-diamino-2,2'-bistrifluoromethylbiphenyl monomer, 100mL N,N-dimethylacetamide in a dry and clean 250mL three-necked flask, Stir at room temperature under protection. After the diamine monomer is completely dissolved, slowly add 10.0580g (25mmol) triphenylenediethene tetracarboxylic dianhydride monomer, 7.0612g (24mmol) 3,3',4,4'-biphenyl tetra Formic acid dianhydride monomer, 50mL N,N-dimethylacetamide, react at room temperature for 18 hours, add 0.30g (2mmol) phthalic anhydride monomer, react at room temperature for 3 hours to obtain polyamic acid solution, filter, and vacuum bubble, and then coat it on a dry and clean glass plate to form a film, put it on a heating plate at 80°C for 30 minutes, dry it in a vacuum oven at 30°C for 3 hours, and take it out of the oven after it cools down. Put in boiling hot water until the colorless transparent polyimide film is removed from the glass plate to obtain a transparent polyimide film with a thicknes...

Embodiment 3

[0136] Add 16.0115g (50mmol) 4,4'-diamino-2,2'-bistrifluoromethylbiphenyl monomer, 120mL N,N-dimethylacetamide in a dry and clean 250mL three-necked flask, Stir at room temperature under protection. After the diamine monomer is completely dissolved, slowly add 2.0116g (5mmol) of triphenylenediyl ether tetracarboxylic dianhydride monomer, 11.7686g (40mmol) of 3,3',4,4'-biphenyl tetra Formic acid dianhydride monomer, 30mL N,N-dimethylacetamide, react at room temperature for 2 hours, add 1.4811g (10mmol) phthalic anhydride monomer, react at room temperature for 10 hours to obtain a polyamic acid solution, filter, and vacuum Then, coat it on a dry and clean glass plate to form a film, put it on a heating plate at 50°C for 90 minutes, dry it in a blast oven at 400°C for 0.5 hour, and take it out of the oven after it cools down , into boiling hot water until the colorless transparent polyimide film was removed from the glass plate to obtain a transparent polyimide film with a thickn...

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Abstract

In order to solve the problem of poor flexibility of the existing transparent polyimide thin film, the invention provides a polyimide polymer, a transparent polyimide thin film and a preparation method of the transparent polyimide thin film. The polyimide polymer has a structural formula (a) shown in the description; the transparent polyimide thin film has a structural formula (b) shown in the description; in the structural formula (a), oxygen atoms in the molecular chain are positioned in a 3nd bit or 4th bit of a benzene ring; in the structural formula (b), A is a residual group of 3,3,4,4-Biphenyltetracarboxylic dianhydride. Synthesis monomers of the thin film comprise dianhydride and diamine; the dianhydride comprises 1,4-bis(3,4-dicarboxyphenoxy)benzene dianhydride and 3,3,4,4-Biphenyltetracarboxylic dianhydride; the diamine comprises 2,2'-bis(trifluoromethyl)-[1,1'-biphenyl]-4,4'-diamine. The transparent polyimide thin film provided by the invention has the advantages that a relatively flexible 1,4-bis(3,4-dicarboxyphenoxy)benzene dianhydride structure unit is introduced into a high-rigidity structure unit, so that the anti-deflection performance of the thin film can be greatly improved; the characteristics of high light transmission rate, good mechanical performance, high heat resistance, good anti-deflection performance and the like are realized.

Description

technical field [0001] The present invention relates to polyimide film and preparation method thereof, particularly a kind of polyimide polymer, a kind of transparent polyimide film and preparation method thereof. Background technique [0002] Colorless transparent polyimide film can be widely used in high-tech fields such as microelectronics and optoelectronics. For example, it is used as optical waveguide material, optical filter, optical fiber, photoelectric packaging material, second-order nonlinear optical material, photorefractive material, photosensitive material and optoelectronic material in the field of optical communication. In the field of liquid crystal display, it is used as alignment film material, negative compensation film, plastic substrate of flexible organic electroluminescent display OLED, etc. In the aerospace field, it is used as a substrate material for solar cell arrays and an antenna reflector / collector material, and can also be used as a colorless...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08J5/18C08L79/08
CPCC08G73/1071C08J5/18C08J2379/08
Inventor 金亚东杨承翰周玉波刘洋汪太生
Owner NINGBO CHANGYANG TECH
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