Quick-curing polyimide coating for high-temperature-resistant optical fiber

A photosensitive polyimide, rapid curing technology, applied in the direction of coating, etc., to achieve good solvent resistance, shrinkage reduction, and good temperature resistance

Active Publication Date: 2014-01-15
中昊北方涂料工业研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There are many documents and patents about UV-curable optical fiber coatings, such as CN1651533A, CN1047104, CN1047103, CN101792619A, CN101068852A, etc., but none of them relates to the rapid curing of polyimide coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Add 109g PMDA, 183g 2,2-bis(3-amino-4 hydroxyphenyl)-hexafluoropropane in 200g NMP into a three-port reactor with a stirring heating device, and react at room temperature for 12-24 hours to synthesize polyamic acid Solution; heat up to 150°C for 3-8 hours for cyclodehydration imidization to obtain fluorine-containing polyimide with active hydroxyl groups, add 105g of methacryloyl chloride and acylate at 10°C for 12-24 hours to obtain active Photosensitive polyimide oligomer.

[0023] (2) Add 98.1g of maleic anhydride, 60g of toluene and 12g of dimethylformamide mixed solvent into a stirred three-port reactor, and finally add 0.2g of p-hydroxyanisole. Stir and dissolve at 53°C-65°C for 30 minutes, weigh 107g of p-toluidine and slowly add it dropwise with a dropping funnel, drop it in 3-5h, then continue to stir for 0.5h, add 0.2g of copper sulfate and 0.5g of p-toluenesulfonic acid , heated to 150 ° C to allow it to reflux. It is observed that there are no more wat...

Embodiment 2

[0026] (1) Add 147g BPDA, 183g 2,2-bis(3-amino-4-hydroxyphenyl)-hexafluoropropane in 220g DMF to a three-port reactor with a stirring heating device, and react at room temperature for 12-24 hours to synthesize polyamide Acid solution; heat up to 150°C and react for 3-8 hours for cyclodehydration imidization to obtain fluorine-containing polyimide with active hydroxyl groups, add 105g of methacryloyl chloride and acylate at 10°C for 12-24 hours to obtain Reactive photosensitive polyimide oligomer.

[0027](2) Add 98.1g of maleic anhydride, 80g of toluene and 15g of dimethylformamide mixed solvent into a stirred three-port reactor, and finally add 0.2g of p-hydroxyanisole. Stir and dissolve at 53°C-65°C for 30 minutes, weigh 115g of p-ethylaniline and slowly add it dropwise with a dropping funnel, drop it in 3-5h, then continue to stir for 0.5h, add 0.2g of copper sulfate and 0.5g of p-toluenesulfonic acid , heated to 150 ° C to allow it to reflux. It is observed that there ar...

Embodiment 3

[0030] (1) Add 120g PMDA, 117g 2,2-bis(3-amino-4methylphenyl)-hexafluoropropane in 210g NMP into a three-port reactor with a stirring heating device, and react at room temperature for 12-24 hours to synthesize polyamide Acid solution; heat up to 150°C and react for 3-8 hours for cyclodehydration imidization to obtain fluorine-containing polyimide with active hydroxyl groups, add 105g of methacryloyl chloride and acylate at 10°C for 12-24 hours to obtain Reactive photosensitive polyimide oligomer.

[0031] (2) Add 98.1g of maleic anhydride, 80g of toluene and 15g of dimethylformamide mixed solvent into a stirred three-port reactor, and finally add 0.2g of p-hydroxyanisole. Stir and dissolve at 53°C-65°C for 30 minutes, weigh 107g of p-toluidine and slowly add it dropwise with a dropping funnel, drop it in 3-5h, then continue to stir for 0.5h, add 0.2g of copper sulfate and 0.5g of p-toluenesulfonic acid , heated to 150 ° C to allow it to reflux. It is observed that there are ...

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Abstract

The invention discloses a quick-curing polyimide coating for high-temperature-resistant optical fiber. The quick-curing polyimide coating comprises an oligomer, a reactive diluent, a heat stabilizer and a reactive photoinitiator. According to the quick-curing polyimide coating for the high-temperature-resistant optical fiber, fluorinated chain segments and active acrylic acid chain segments are introduced into a polyimide structure, so that fluorine-modified photosensitive polyimide has excellent properties such as solubility, low optical loss, dielectric constant and moisture absorption; and the fluorine-modified photosensitive polyimide has higher photosensitivity, the film loss rate is minimal after film forming, and fundamental chains crosslink after being exposed, so that the chemical stability of the polymer is further improved. As a more complete polypyromellitimide structure is kept, the coating has special excellent thermal stability, good mechanical, electrical, chemical and photographic properties and very low coefficient of thermal expansion of polyimide. A pre-imidization technology is adopted, therefore, the processes of dehydration and condensation during the process of curing the polyimide are omitted; and the efficient reactive photoinitiator is introduced into the coating, and thus, the quick curing of the polyimide is realized.

Description

technical field [0001] The invention relates to a fast-curing polyimide coating for high-temperature-resistant optical fibers, in particular to a fast-curing high-temperature-resistant optical fiber that can be rapidly cured by ultraviolet light or electron beams and has temperature resistance and strong tensile strength. Polyimide coating. It is mainly used in the outer layer protection of special temperature-resistant optical fiber cables, and can also be used in other optoelectronic coatings that require fast curing. Background technique [0002] Optical fibers have the characteristics of light weight, anti-electromagnetic interference, and large transmission capacity, and are increasingly used in aerospace signal transmission systems. The harsh working environment requires the optical fiber to be resistant to high temperature and low temperature. Optical fiber coatings are coatings used to protect optical glass fibers from the external environment and maintain their su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/00C09D4/02C09D5/00
Inventor 王国志刘文兴胥卫奇李姗姗冯俊忠南燕杨康
Owner 中昊北方涂料工业研究设计院有限公司
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