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Production process of hydrophobic polyimide film

A technology of polyimide film and production process, which is applied in the field of preparation of modified polyimide film, and can solve problems such as limiting the scope of use

Active Publication Date: 2021-10-26
JIANGSU TRANSIMAGE TECH CO LTD
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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 provide a production process of hydrophobic polyimide film, which is used to solve the technical problem that the existing polyimide film has certain water absorption and limits its application range

Method used

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  • Production process of hydrophobic polyimide film
  • Production process of hydrophobic polyimide film
  • Production process of hydrophobic polyimide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare diamine monomer A, and diamine monomer A is made by following steps:

[0032] Step S1: Add p-toluene benzoic acid and p-cresol to the flask, then add p-toluenesulfonic acid and toluene, and react at a temperature of 115°C for 4 hours. After the reaction, the reaction product is cooled to 70°C and transferred to liquid separation funnel, and add a saturated sodium chloride aqueous solution with a temperature of 70 ° C, shake and let stand for 30 minutes to separate layers, add the organic phase to the flask, distill under reduced pressure to remove toluene, and filter to obtain intermediate 1; the p-toluic acid , p-cresol, p-sulfobenzoic acid, and toluene are used in a ratio of 0.05mol: 0.05mol: 1.8g: 45mL;

[0033] Step S2: Add intermediate 1 and deionized water to the flask, reflux and add potassium permanganate, reflux for 3 hours to obtain intermediate 2; then add intermediate 2 and deionized water to the flask, add DMF and dichloro Sulfoxide, reflux reactio...

Embodiment 2

[0039] Prepare diamine monomer A, and diamine monomer A is made by following steps:

[0040]Step S1: Add p-toluene benzoic acid and p-cresol to the flask, then add p-toluenesulfonic acid and toluene, and react at a temperature of 117.5°C for 4.5 hours. After the reaction, the reaction product is cooled to 70°C and transferred to a separate Liquid funnel, and add the saturated sodium chloride aqueous solution that the temperature is 70 ℃, shake and stand for 30min to separate layers, add the organic phase to the flask, distill under reduced pressure to remove toluene, and filter to obtain intermediate 1; the p-toluene The dosage ratio of formic acid, p-cresol, p-sulfobenzoic acid and toluene is 0.05mol: 0.05mol: 1.8g: 45mL;

[0041] Step S2: Add intermediate 1 and deionized water to the flask, reflux and add potassium permanganate, reflux for 3 hours to obtain intermediate 2; then add intermediate 2 and deionized water to the flask, add DMF and dichloro Sulfoxide, reflux react...

Embodiment 3

[0047] Prepare diamine monomer A, and diamine monomer A is made by following steps:

[0048] Step S1: Add p-toluene benzoic acid and p-cresol to the flask, then add p-toluenesulfonic acid and toluene, and react at a temperature of 120°C for 5 hours. After the reaction is completed, the reaction product is cooled to 70°C and transferred to liquid separation funnel, and add a saturated sodium chloride aqueous solution with a temperature of 70 ° C, shake and let stand for 30 minutes to separate layers, add the organic phase to the flask, distill under reduced pressure to remove toluene, and filter to obtain intermediate 1; the p-toluic acid , p-cresol, p-sulfobenzoic acid, and toluene are used in a ratio of 0.05mol: 0.05mol: 1.8g: 45mL;

[0049] Step S2: Add intermediate 1 and deionized water to the flask, reflux and add potassium permanganate, reflux for 3 hours to obtain intermediate 2; then add intermediate 2 and deionized water to the flask, add DMF and dichloro Sulfoxide, r...

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Abstract

The invention discloses a production process of a hydrophobic polyimide film, which belongs to the technical field of modified polyimide film preparation. The production process of the hydrophobic polyimide film comprises the following steps of preparing a diamine monomer A, reacting a diamine monomer A with a dianhydride monomer to prepare a polyamic acid solution, and performing imidization to obtain a polyimide film. A diamine monomer A is prepared, so that the prepared polyimide has a C-F bond and a siloxane chain with excellent hydrophobic performance, the diamine monomer A is provided with an ester group in the middle, the structural symmetry degree of the diamine monomer A is relatively high, a polymer can locally form microcrystals, and due to the existence of the local microcrystals, the diffusion of water molecules in the polymer is hindered; when water molecules encounter local microcrystals of a macromolecular chain, macromolecular chain segments in a crystalline structure are tightly piled, so that the water molecules cannot permeate and diffuse, the advancing of the water molecules is blocked finally, and the hydrophobic performance of the film is further improved.

Description

technical field [0001] The invention relates to the technical field of preparation of modified polyimide films, in particular to a production process of hydrophobic polyimide films. Background technique [0002] Polyimide refers to a class of polymers containing imide rings (-CO-N-CO-) in the main chain. It is one of the organic polymer materials with the best comprehensive performance. Polyimide has high strength , low dielectric, high modulus, high temperature resistance and radiation resistance and other excellent properties, its high strength, low dielectric, high modulus, high temperature resistance and radiation resistance and other excellent properties have attracted much attention and application. Among aromatic heterocyclic polymer materials, aromatic polyimide materials have become high-performance materials due to their excellent heat resistance stability, radiation resistance, excellent mechanical properties, low dielectric properties and processability. A repre...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08G73/10C07F7/18C08L79/08
CPCC08J5/18C08G73/1071C08G73/1039C08G73/1003C07F7/1804C07F7/1892C08J2379/08
Inventor 邹伟民刘承伟陆妮徐海徐寅
Owner JIANGSU TRANSIMAGE TECH CO LTD
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