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Production method for formable polyimide film

A technology of polyimide film and production method, which is applied in the production field of formable polyimide film, can solve the problems of unsatisfactory market development, poor formability, low mechanical strength, etc., and achieve excellent physical properties and self-lubrication Good performance and high mechanical strength

Inactive Publication Date: 2012-05-09
宁波今山电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the polyimide film obtained by this method has poor formability, high temperature resistance, and low mechanical strength, which cannot meet the needs of market development.

Method used

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  • Production method for formable polyimide film
  • Production method for formable polyimide film
  • Production method for formable polyimide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The production method of a moldable polyimide film provided by this embodiment includes resin synthesis, defoaming, salivation film formation and winding and cutting, and the resin synthesis is 4,4'-dimethyl Press acetamide into the amine melting kettle, then meter the mixed 4,4'-diaminodiphenyl ether + p-phenylenediamine + 4,4'-diaminodiphenylmethane mixture into the amine melting kettle, and stir for 1 Hours, the mixture was completely dissolved in 4,4'-dimethylacetamide, and then the solution was hydraulically poured into the reactor, and the measured 4,4'-oxydiphthalic anhydride + 3,3' , 4,4'-biphenyltetracarboxylic dianhydride + pyromellitic dianhydride mixture is added to the reactor, reacted for 4 hours to form a sol-type polyamic acid resin, adjust the resin viscosity by adjusting the amount of residual anhydride; the test viscosity reaches About 30000cP to 100000cP is enough; the raw materials are composed of: 40 parts of 4,4'-oxydiphthalic anhydride, 20 parts ...

Embodiment 2

[0024] The production method of the formable polyimide film described in this example, the composition of its raw materials is: 30 parts of 4,4'-oxydiphthalic anhydride, 3,3',4,4'-biphenyl tetra Formic dianhydride 10, pyromellitic dianhydride 30; 4,4'-diaminodiphenyl ether 20, p-phenylenediamine 30, 4,4'-diaminodiphenylmethane 20 parts, the production method is the same as in Example 1 .

[0025] The moldable polyimide film obtained by the production method of the moldable polyimide film provided in this embodiment has a performance parameter of:

[0026] Performance parameter table

[0027]

[0028] Note: Tensile strength, elongation at break, and dielectric strength are the average values ​​of multiple measurements.

Embodiment 3

[0030] The production method of the formable polyimide film described in this example, the composition of its raw materials is: 50 parts of 4,4'-oxydiphthalic anhydride, 3,3',4,4'-biphenyl tetra 30 parts of formic dianhydride, 50 parts of pyromellitic dianhydride; 40 parts of 4,4'-diaminodiphenyl ether, 50 parts of p-phenylenediamine, 40 parts of 4,4'-diaminodiphenylmethane. Production method is with embodiment 1.

[0031] The moldable polyimide film obtained by the production method of the moldable polyimide film provided in this embodiment has a performance parameter of:

[0032] Performance parameter table

[0033]

[0034]

[0035] Note: Tensile strength, elongation at break, and dielectric strength are the average values ​​of multiple measurements.

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Abstract

The present invention discloses a production method for a formable polyimide film. The method comprises resin synthesizing, defoaming, slobbering and film forming, and winding and splitting. The resin synthesizing treatment comprises: pressing 4,4'-dimethyl acetamide into an amine dissolving kettle; adding a calculated mixture comprising 4,4'-diaminodiphenyl ether, para-phenylenediamine and 4,4'-diamino-diphenyl-methane to the amine dissolving kettle, stirring for 1 hour until the mixture is completely dissolved in the 4,4'-dimethyl acetamide; pressing the resulting mixing solution into a reaction kettle; adding a calculated mixture comprising 4,4'-oxydiphthalic anhydride, 3,3',4,4'-biphenyl tetracarboxylic diandhydride and pyromellitic dianhydride to the reaction kettle, carrying out a reaction for 4 hours to form a sol type polyamide acid resin, wherein the viscosity of the resin is adjusted by adjusting the amount of the residual anhydride. The prepared formable polyimide film by the method of the present invention can not be deformed after forming, and good physical properties, good electrical properties and good mechanical properties of the film can be maintained.

Description

technical field [0001] The invention relates to a production technology of a plastic film, in particular to a production method of a formable polyimide film. Background technique [0002] The application number is ZL201010284219.0, and the Chinese invention patent application titled "Polyimide film and its production process" discloses a material mainly composed of A material 4,4'-bis(4-aminophenoxy)diphenyl Ether and material B biphenyltetracarboxylic dianhydride are polymerized, and the ratio of the number of imide groups to the molecular weight of the chain link is 2 / 678. The production process is as follows: weighing materials A and B according to a weight ratio of 1.3: (0.99-1.0); the solvent is N, N'-dimethylacetamide. First put material A into the solvent and stir to dissolve, then put into material B and stir several times, with an interval of 20-50 minutes between each time; control the temperature at 20-70°C. When the viscosity of the resin reaches 40,000-70,000 ...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08G73/10C08J5/18
Inventor 岑建军
Owner 宁波今山电子材料有限公司
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