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Polyimide paint for optical fiber and preparation method thereof

A polyimide and optical fiber technology, applied in the direction of coating, etc., can solve the problems of low temperature resistance level, application limitation, poor resistance to alternating cycles of cold and heat, etc., and achieves fewer types of use, convenient sources and good The effect of the application foreground

Inactive Publication Date: 2012-06-27
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the temperature resistance level of the above resin is not high, and the alternating cold and heat resistance is not good, so its application is limited, especially in high-tech fields such as aerospace

Method used

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  • Polyimide paint for optical fiber and preparation method thereof
  • Polyimide paint for optical fiber and preparation method thereof
  • Polyimide paint for optical fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Put 440.5 grams (1.0 moles) of 2,2-bis[4-(2,4-diaminophenoxy)phenyl]propane and 5500 milliliters of N-methyl-2-pyrrolidone into a highly polar aprotic organic solvent In the reaction kettle, at room temperature, after stirring and dissolving completely, add 196.0 grams (2.0 moles) of maleic anhydride solid powder, stir at room temperature until completely dissolved, continue stirring for 0.5 to 1 hour, then add 310.0 grams (1.0 moles) of 3, 3',4,4'-Tetracarboxydiphenyl ether dianhydride, stirred and reacted at 0°C-5°C for 2 to 3 hours to obtain a homogeneous transparent viscous resin solution; add 3000 ml of toluene azeotropic dehydrating agent, total After boiling and reflux, separating water and stirring for 6-8 hours, separate about 3500 ml of solvent, cool to room temperature, and obtain 5910 g of maleimide-based polyimide solution (referred to as component A), and measure the solid content was 15.4%.

Embodiment 2

[0039] 36.6 grams (0.1 moles) of 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane, 20.0 grams (0.1 moles) of 4,4'-diaminodiphenyl ether, 10.0 grams of α, ω- Diaminopropyl polydimethylsiloxane (the molar number of amino groups is 0.004, product of Shanghai Ruitu Electronic Materials Co., Ltd., brand YSI004) and 600 ml of N-methylpyrrolidone solvent are mixed at room temperature, and after stirring and dissolving completely, add 58.8 grams (0.2 moles) of 3,3',4,4'-tetracarboxybiphenyl dianhydride and 1.1 grams (0.002 moles) of 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl ] Aromatic dibasic acid anhydride of propane dianhydride, after reacting at room temperature for 4 to 5 hours, a homogeneous transparent viscous resin solution is obtained; add 1200 ml of toluene, react with azeotropic water separation for 6 to 8 hours, and separate the solvent About 1100 ml was cooled to room temperature to obtain 807 g of phenolic hydroxyl-containing polysiloxane imide solution (referred to as com...

Embodiment 3

[0041] 29.0 grams (0.1 moles) of 4,4'-diamino-4"-hydroxytriphenylmethane, 41.0 grams (0.1 moles) of 2,2-bis[4-(4-aminophenoxy)phenyl]propane, 20.0 grams (0.1 moles) of 3,4'-diaminodiphenyl ether, 10.0 grams of α, ω-diaminopropyl polydimethylsiloxane (the molar number of amino groups is 0.004, products of Shanghai Ruitu Electronic Materials Co., Ltd. , brand YSI004) and 1200 ml of N-methylpyrrolidone solvent were mixed at room temperature, and after stirring and dissolving completely, 21.8 g (0.1 mol) of pyromellitic dianhydride, 58.8 g (0.2 mol) of 3,3',4,4 '-Tetracarboxybiphenyl dianhydride and 1.1 grams (0.002 moles) of 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, react at room temperature After 4-5 hours, a homogeneous transparent viscous resin solution was obtained; 800 ml of toluene was added, and after 6-8 hours of azeotropic water separation reaction, about 1000 ml of solvent was separated and cooled to room temperature to obtain 1107 g of phenolic hydrox...

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PUM

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Abstract

The invention relates to a polyimide paint for an optical fiber and a preparation method thereof. The paint comprises, by weight, maleimide polyimide, bimaleimide and polysiloxane imide containing phenolic hydroxyl group in a mass ratio of 1:0.1-0.2:0.5-2.0, and the balance of organic solvent; and a solid content of the paint is 10-30%. The preparation method comprises steps of: respectively preparing maleimide polyimide and polysiloxane imide containing phenolic hydroxyl group; and copolymerizing the two with bimaleimide. The raw material resins employed by the invention have easily controllable molecular weight and easily adjustable molecular structure, and are in favor of preparing polyimide paint for optical fiber, with ideal performances; and the method has advantages of simple process, low cost, environment-friendliness, a preparation process completed in a universal device, and suits for industrial production.

Description

technical field [0001] The invention belongs to the field of optical fiber coating and its preparation, in particular to a polyimide coating for optical fiber and its preparation method. Background technique [0002] The optical fiber for optical communication is made of quartz glass (multi-component quartz glass) or glass doped with rare earth elements after melting and drawing. In order to ensure the original strength of the optical fiber, the surface must be coated with a protective material - optical fiber coating. Only in this way can environmental stress and water molecules corrode the microcracks on the surface of the optical fiber and the "hydrogen damage" caused by hydrogen in the air to the optical fiber can be avoided. Optical fiber coatings can provide strength protection, waterproof and stress buffering for optical fibers, so as to maintain the excellent mechanical and optical properties of optical fibers. [0003] Optical fiber coating is an indispensable key ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D183/08C09D7/12C08G73/12C08G77/26C03C25/50C03C25/32C03C25/40
Inventor 虞鑫海陈东红陈梅芳
Owner DONGHUA UNIV
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