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High-temperature resistant benzimidazole optical fiber coating and preparation method of coating

A technology of benzimidazole and optical fiber, which is applied in the field of optical fiber coating and its preparation, can solve the problems such as poor resistance to alternating cycles of cold and heat, low temperature resistance, and application limitations.

Inactive Publication Date: 2013-02-06
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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  • High-temperature resistant benzimidazole optical fiber coating and preparation method of coating
  • High-temperature resistant benzimidazole optical fiber coating and preparation method of coating
  • High-temperature resistant benzimidazole optical fiber coating and preparation method of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067]Dissolve 23.0 g (0.1 mole) of 3,3',4,4'-tetraaminodiphenyl ether (TADE) in 300 ml of N-methyl-2-pyrrolidone (NMP) and stir at room temperature to form a homogeneous solution Finally, add 40.4 grams (0.4 moles) of triethylamine (TEA) and 38.9 grams (0.21 moles) of p-nitrobenzoyl chloride (PNBC), stir and react for 3-5 hours, filter, and add 2.2 grams of metal palladium in the mother liquor When the palladium / carbon catalyst with a mass percentage content of 10% is heated to 90°C-95°C, 88.2 grams (1.5 moles) of a hydrazine hydrate (HH) solution with a mass percentage concentration of 85% is added dropwise, and the reaction is stirred for 5-6 hours. Filtrate while it is hot, recover the palladium / carbon catalyst for recycling, add 60.8 grams (0.6 moles) of concentrated hydrochloric acid (36% by mass percentage) after the mother liquor is cooled, heat and reflux for 3-4 hours, cool to room temperature, add dropwise 336.0 grams (0.84 moles) of 10% sodium hydroxide aqueous sol...

Embodiment 2

[0069] 22.4 g (0.1 mole) of 2-(4-aminophenyl)-5-aminobenzimidazole (APABI), 36.6 g (0.1 mole) of 2,2-bis(3-amino-4-hydroxyphenyl) hexa Fluoropropane (BAHPFP), 40.0 g (0.2 moles) of 4,4'-diaminodiphenyl ether (DADPE) were dissolved in 1500 g of N,N-methylacetamide (DMAc), cooled to 2°C, and 128.8 g (0.4 moles) 3,3',4,4'-tetracarboxybenzophenone dianhydride (BTDA), after stirring for 5 hours, 1720 grams of homogeneous and transparent viscous polybenzimidazole amic acid (PBIA ) solution, that is, component A, denoted as component A1, with a solid content of 13%.

Embodiment 3

[0071] 22.4 g (0.1 mol) of 2-(4-aminophenyl)-5-aminobenzimidazole (APABI), 43.2 g (0.2 mol) of 3,3'-diamino-4,4'-dihydroxybiphenyl (DADHBP), 36.6 g (0.1 mol) 2,2-bis(3-amino-4-hydroxyphenyl) hexafluoropropane (BAHPFP), 51.8 g (0.1 mol) 2,2-bis[4-(4- Aminophenoxy)phenyl]hexafluoropropane (BAPFP) was dissolved in 100 g of N,N-dimethylacetamide (DMAc) and 1000 g of N-methyl-2-pyrrolidone (NMP) and cooled to 0 °C , adding 31.0 g (0.1 mol) of 3,3',4,4'-tetracarboxydiphenyl ether dianhydride (ODPA) and 87.2 g (0.4 mol) of pyromellitic dianhydride, and stirring for 10 hours to obtain 1365 gram of homogeneous transparent viscous polybenzimidazole amic acid (PBIA) solution, ie component A, denoted as component A2, with a solid content of 19.8%.

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Abstract

The invention relates to a high-temperature resistant benzimidazole optical fiber coating and a preparation method of the coating. The coating comprises polyamic acid containing active vinyl, polybenzimidazole amic acid and high-polarity aprotic organic solvent. The preparation method comprises the following steps of dissolving benzimidazole diamine, diamine containing phenolic hydroxyl, and other aromatic diamine in the high-polarity aprotic organic solvent, cooling to 0 DEG C to 5 DEG C, adding aromatic diaanhydrid monomer, stirring and reacting for 5 to 10 hours, obtaining the polybenzimidazole amic acid solution, adding the polyamic acid solution containing the active ethenyl, stirring and uniformly mixing, and obtaining the high-temperature resistant benzimidazole optical fiber coating. The coating is simple in solidification process, good in high temperature resistance, and excellent in mechanical property and electrical property. The preparation method is simple, the reaction condition is mild, the process is easy to control, the preparation of the optical fiber coating with ideal performances is facilitated, and the industrialization prospect is good.

Description

technical field [0001] The invention belongs to the field of optical fiber coating and its preparation, in particular to a high temperature resistant benzimidazole type optical fiber coating 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 ...

Claims

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Application Information

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IPC IPC(8): C03C25/32C08G73/18
CPCY02P20/584
Inventor 虞鑫海郭翔
Owner DONGHUA UNIV
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