Preparation method of antistatic polyimide shielding black film

A polyimide and anti-static technology, applied in the field of films with anti-static and shielding effect, can solve problems such as damage, trouble, casualties, etc., and achieve the effect of promoting dispersion, stable process production, and good electromagnetic shielding effect.

Active Publication Date: 2018-01-30
NINGBO JINSHAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the static electricity is slightly accumulated, it brings trouble and inconvenience to life, and when it is seriously accumulated, it is not only a troublesome problem, but sometimes even causes casualties and equipment damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of preparation method of antistatic polyimide shielding black film provided by the present embodiment comprises adopting additive and polyamic acid, wherein the weight ratio of additive in polyamic acid is 0.5%; Said additive is made of nano-nickel powder , carbon black and coupling agent, in which the proportion of nano-nickel powder, carbon black and coupling agent is 2%: 97%: 1%. The coupling agent is γ-aminopropyltriethoxysilane, and the polyamic acid is obtained by polycondensation of 4,4-diaminodiphenyl ether and pyromellitic dianhydride in dimethylacetamide.

[0015] When synthesizing, first nanometer nickel powder, carbon black, coupling agent three kinds of additives are dispersed in organic solvent dimethylacetamide, then 4,4-diaminodiphenyl ether and pyromellitic dianhydride are mixed in equimolar ratio Calculate the amount of reaction required for each, and synthesize polyamic acid. During the synthesis process, first put the 4,4-diaminodiphenyl ether...

Embodiment 2

[0018] A kind of preparation method of antistatic polyimide shielding black film provided by the present embodiment comprises adopting additive and polyamic acid, wherein the weight ratio of additive in polyamic acid is 2%; Described additive is made of nano-nickel powder , carbon black and coupling agent, in which the proportion of nano-nickel powder, carbon black and coupling agent is 2%: 97%: 1%. The coupling agent is γ-methacryloxypropyltrimethoxysilane, and the polyamic acid is obtained by polycondensation of p-phenylenediamine and pyromellitic dianhydride in dimethylacetamide.

[0019] Synthetic method is identical with embodiment 1, and the volume resistivity of the antistatic polyimide shielding black film of present embodiment gained is between 10 7 Ω•cm, and its shielding effectiveness is 43dB measured by the coaxial test method.

Embodiment 3

[0021] A kind of preparation method of antistatic polyimide shielding black film provided by the present embodiment comprises adopting additive and polyamic acid, wherein the weight ratio of additive in polyamic acid is 5%; Described additive is made of nano-nickel powder , carbon black and coupling agent, in which the proportion of nano-nickel powder, carbon black and coupling agent is 2%: 97%: 1%. The coupling agent is γ-aminopropyltriethoxysilane, and the polyamic acid is obtained by polycondensation of 4,4-diaminodiphenyl ether and diphenyl ether tetracarboxylic dianhydride in N-methylpyrrolidone .

[0022] Synthetic method is identical with embodiment 1, and the volume resistivity of the antistatic polyimide shielding black film of present embodiment gained is between 10 6 Ω·cm, and its shielding effectiveness is 40dB measured by the coaxial test method.

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Abstract

The invention discloses a method for preparing an antistatic polyimide shielding black film. Powder, carbon black and coupling agent, in which nano-nickel powder accounts for 1%~8% of the total additive; carbon black accounts for 90%~98% of the total additive; coupling agent accounts for 1%~2% of the total additive %; the polyamic acid is obtained by polycondensation of diamine and dianhydride in a solvent; during synthesis, at first these three additives of nano-nickel powder, carbon black and coupling agent are dissolved in a solvent, and then diamine and dianhydride Calculate the required reaction amount according to the equimolar ratio, synthesize polyamic acid, and then defoam and cast it into a film. The obtained product not only has antistatic effect, but also has a volume resistivity of 104Ω•cm~109Ω•cm, At the same time, it has a good electromagnetic shielding effect and can be applied to electronic fields such as high-end flexible circuit boards.

Description

technical field [0001] The invention relates to a preparation method of a polyimide film, in particular to a preparation method of an antistatic polyimide shielding black film, belonging to the field of films with antistatic and shielding effects. Background technique [0002] Since the polyimide film (PI film) was put into use in the 1960s, its excellent thermal properties, dielectric properties and mechanical properties have made it the preferred material in the electronics and aerospace industries. With the development of the electronics industry, the requirements for polyimide properties are getting higher and higher. [0003] Due to the insulating properties of general-purpose polymer materials, static electricity will inevitably accumulate during use. When static electricity accumulates slightly, it brings trouble and inconvenience to life, but when it accumulates seriously, it is not only a troublesome problem, but sometimes even causes casualties and equipment damag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L79/08C08K3/08C08K3/04C08G73/10
Inventor 岑建军吴武波吴春泉芦善波
Owner NINGBO JINSHAN NEW MATERIAL
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