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High-transparency copolymerization type fluorine-containing polyimide thin material and preparation method of high-transparency copolymerization type fluorine-containing polyimide thin material

The technology of polyimide film and polyimide resin is applied in the field of highly transparent copolymerized fluorine-containing polyimide film material and its preparation, which can solve the problems of dark color and poor optical transparency, and achieve high optical transparency. excellent heat resistance, simple preparation route

Inactive Publication Date: 2017-06-13
江苏德瑾绿水环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to improve conventional polyimides which are difficult to be directly processed into films, deep color, poor optical transparency, etc., by co-condensation modification, by optimizing the molecular chain structure of the polymer, and at the same time in the polyimide molecular structure Introducing bistrifluoromethylbiphenyl structure and diphenylmethane structure, designed and developed a kind of copolymerized fluorine-containing polyimide film material with excellent film-forming properties and high optical transparency and its preparation method

Method used

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  • High-transparency copolymerization type fluorine-containing polyimide thin material and preparation method of high-transparency copolymerization type fluorine-containing polyimide thin material
  • High-transparency copolymerization type fluorine-containing polyimide thin material and preparation method of high-transparency copolymerization type fluorine-containing polyimide thin material
  • High-transparency copolymerization type fluorine-containing polyimide thin material and preparation method of high-transparency copolymerization type fluorine-containing polyimide thin material

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Experimental program
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Effect test

Embodiment 1

[0021] (1) Add 0.9606g (3mmol) of 2,2'-bistrifluoromethyl-4,4'-diaminobiphenyl and 0.5948g (3mmol) of a three-neck dry round-bottomed flask with nitrogen gas. 4,4'-diaminodiphenylmethane and 1.861g (6mmol) of diphenyl ether tetra-acid dianhydride three monomers, then add 17.1g m-cresol as solvent, stir and dissolve at room temperature, add 0.35g iso Quinoline was used as a catalyst, the temperature was raised to 170°C, and the reaction solution was poured into 500ml of ethanol, filtered, and dried to obtain a fibrous copolymerized fluorine-containing polyimide resin through a nitrogen flow with water and stirred for 12 hours. 98%.

[0022] (2) Further dissolve the polyimide resin in the chloroform solution to make a 5wt% polymer solution, coat the polymer solution on the flat glass, and dry it in an oven at 30° C. for 24 hours to obtain high transparency Copolymerized fluorine-containing polyimide film samples.

Embodiment 2

[0024] (1) Add 1.2809g (4mmol) of 2,2'-bistrifluoromethyl-4,4'-diaminobenzidine, 0.3965g (2mmol) respectively to a 50ml dry round-bottomed three-necked flask with nitrogen gas. 4,4'-diaminodiphenylmethane and 1.861g (6mmol) of diphenyl ether tetra-acid dianhydride three monomers, then add 35.3g of m-cresol as a solvent, stir the reaction at room temperature to dissolve, add 1.4g Isoquinoline is used as a catalyst, the temperature is raised to 190°C, and the reaction solution is poured into 1000ml of ethanol, filtered, and dried to obtain a fibrous copolymerized fluorine-containing polyimide resin. The rate is 98%.

[0025] (2) Further dissolve the polyimide resin in N,N-dimethylacetamide solution to form a 10wt% polymer solution, coat the polymer solution on flat glass, and place it in an oven at 70°C After drying for 24 hours, a highly transparent polyimide film sample can be obtained.

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Abstract

The invention provides a high-transparency copolymerization type fluorine-containing polyimide thin material and a preparation method of the high-transparency copolymerization type fluorine-containing polyimide thin material. The polyimide thin material has good solubility and firm forming property; a prepared polyimide thin film has excellent optical transparency and good thermal performance. The preparation method of the high-transparency copolymerization type fluorine-containing polyimide thin material comprises the following steps: under nitrogen protection, dissolving an aromatic diamine monomer containing a bistrifluoromethyl structure, a non-fluorine-containing monomer and a tetracarboxydiphthalic ether dianhydride monomer into an organic solvent according to a certain metering ratio; adding a certain amount of a catalyst and raising temperature to 170 DEG C to 190 DEG C; carrying water through a nitrogen gas flow; after stirring and reacting for 8h to 12h, finishing reaction; precipitating, filtering and drying to obtain fiber-shaped copolymerization type fluorine-containing polyimide resin; furthermore, coating a film on flat plate glass through a polymer solution of the fiber-shaped copolymerization type fluorine-containing polyimide resin, and drying to obtain the high-transparency polyimide film.

Description

technical field [0001] The invention belongs to the field of high-performance polyimide polymers and their preparation, in particular to a class of highly transparent copolymerized fluorine-containing polyimide film materials and their preparation methods. Background technique [0002] Polyimide is an important class of aromatic polymers. As high-performance materials such as films, fibers, and foams, it has important application value in modern high-tech fields. However, due to the rigidity and crystallinity of the polymer molecular chain structure, conventional polyimides are usually infusible and insoluble, and the processability is poor. The films and fibers need to be prepared by using the precursor polyamic acid, and then the imide is further processed. The corresponding polyimide film and fiber can not be prepared by direct utilization of polyimide resin, and the products after imidization are difficult to be processed and recycled. In addition, due to the highly aro...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08J5/18
CPCC08G73/1071C08J5/18C08J2379/08
Inventor 汪称意徐常曹世杰
Owner 江苏德瑾绿水环保科技有限公司
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