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A kind of photocuring fluorine-containing silicone optical fiber coating and preparation method thereof

A silicone and light-curing technology, applied in the direction of coating, etc., can solve the problems of difficult control of product composition, structural molecular weight distribution, reduce the viscosity and refractive index of optical fiber coatings, reduce the low temperature resistance of optical fiber coatings, etc., and achieve the improvement of ultraviolet radiation , Reduce the friction coefficient, the effect of large flexibility

Active Publication Date: 2016-03-23
GUILIN ELECTRICAL EQUIP SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw material acrylic fluorosilicone polymer oligomer is obtained by heating and polymerizing low-viscosity methyl vinyl silicone oil and more than three acrylic fluoromonomers under the action of an initiator. Self-polymerization and mutual polymerization have many by-products, which makes it difficult to control the product composition, structure, and molecular weight distribution. Too many small-molecular-weight acrylic fluorosilicone polymers will cause the obtained optical fiber coating to reduce the resulting stress due to excessive cross-linking density. Low temperature resistance of optical fiber coating; In addition, the optical fiber coating composition uses acrylic fluorine monomer as a reactive diluent, although it can reduce the viscosity of optical fiber coating and reduce the refractive index, but the small molecular weight of acrylic fluorine monomer is After polymerization, it will lead to high shrinkage of optical fiber coatings, and there are also environmental problems; moreover, although the hydrophobicity of the product is improved due to the introduction of fluorine groups, the low temperature resistance and ultraviolet radiation of acrylate are poor, and it is difficult to Adapt to changes in harsh environments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Dry and dehydrate 10g of octamethylcyclotetrasiloxane, 4g of tetramethyltetravinylcyclotetrasiloxane and 60g of trifluoropropylmethylcyclotetrasiloxane in vacuum at 40°C for 0.5h, add 0.74 g tetramethylammonium hydroxide, blow nitrogen into it (equivalent to stirring), raise the temperature to 70°C, maintain it for 0.5h, add 0.8g tetramethyldivinyldisiloxane, slowly raise the temperature to 100°C and react for 2 hours ;Finally, raise the temperature to 190°C and keep it for 1h, decompose tetramethylammonium hydroxide, vacuumize (vacuum degree is -0.09MpaKPa) to remove low molecular weight substances, and obtain colorless and transparent trifluoropropylmethylvinyl Polysiloxane with a viscosity of 2800mPa·s.

[0024] 2) React 38g of octamethylcyclotetrasiloxane, 10g of methyltrimethoxysilane, 5g of KH590, 7g of KH970, 0.7g of water and 0.42g of concentrated hydrochloric acid at 85°C for 3 hours under the protection of nitrogen gas, cool to room temperature, and use Wa...

Embodiment 2

[0028] (1) Dry and dehydrate 18g of octamethylcyclotetrasiloxane, 3g of tetramethyltetravinylcyclotetrasiloxane and 75g of trifluoropropylmethylcyclotetrasiloxane in vacuum at 40°C for 0.5h, add 0.97g of tetramethylammonium hydroxide, blowing nitrogen gas (equivalent to stirring), raising the temperature to 70°C, maintaining it for 0.5h, adding 1g of tetramethyldivinyldisiloxane, slowly raising the temperature to 105°C for 2 hours ;Finally, raise the temperature to 190°C and keep it for 1h, decompose tetramethylammonium hydroxide, vacuumize (vacuum degree is -0.09MpaKPa) to remove low molecular weight substances, and obtain colorless and transparent trifluoropropylmethylvinyl Polysiloxane with a viscosity of 3200mPa·s.

[0029] (2) React 45g of octamethylcyclotetrasiloxane, 10g of methyltrimethoxysilane, 10g of KH590, 15g of KH970, 1.5g of water and 0.72g of concentrated hydrochloric acid at 80°C for 3 hours under the protection of nitrogen gas, and cool to room temperature. ...

Embodiment 3

[0033] (1) Dry and dehydrate 10g of octamethylcyclotetrasiloxane, 2g of tetramethyltetravinylcyclotetrasiloxane and 70g of trifluoropropylmethylcyclotetrasiloxane in vacuum at 40°C for 0.5h, add 0.83g of tetramethylammonium hydroxide, blowing nitrogen gas (equivalent to stirring), raised the temperature to 70°C, maintained for 0.5h, added 1.2g of tetramethyldivinyldisiloxane, and slowly raised the temperature to 95°C for reaction 2 Hours; Finally, the temperature was raised to 190°C and maintained for 1 hour to decompose tetramethylammonium hydroxide, vacuumize (vacuum degree is -0.09MpaKPa) to remove low molecular weight substances, and obtain colorless and transparent trifluoropropylmethylethylene base polysiloxane, the viscosity is 1200mPa·s;

[0034] (2) React 60g of octamethylcyclotetrasiloxane, 5g of methyltrimethoxysilane, 10g of KH590, 10g of KH970, 2.4g of water and 0.64g of concentrated sulfuric acid at 85°C for 3 hours under the protection of nitrogen gas, and cool ...

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Abstract

The invention discloses a photo-cured fluorine-containing organosilicone optical fiber coating and a preparation method thereof. The photo-cured fluorine-containing organosilicone optical fiber coating comprises the following active ingredients in parts by weight: 30-60 parts of polytrifluoropropylvinylmethylsiloxane and 5-30 parts of thiopropyl silicon oil, as well as photoinitiator the weight of which is 1-5wt% of the total weight of active ingredients. The preparation method of the coating comprises the following steps: preparing polytrifluoropropylvinylmethylsiloxane, thiopropyl silicon oil and the photoinitiator (the weight of which is 1-5wt% of the total weight of active ingredients) according to the formula, and evenly mixing to obtain the photo-cured fluorine-containing organosilicone optical fiber coating. Compared with the prior art, the photo-cured fluorine-containing organosilicone optical fiber coating has lower refractive index, and low additional losses, as well as higher mechanical strength.

Description

technical field [0001] The invention relates to an optical fiber coating material, in particular to a photocurable fluorine-containing organic silicon optical fiber coating and a preparation method thereof. Background technique [0002] With the rapid development of optical fiber communication technology, the amount of optical fiber coating used as optical fiber protection is increasing, which also puts forward higher requirements for performance. Existing optical fiber coatings are mainly based on acrylic or acrylic resins. Due to the high viscosity of the resins, diluents need to be added to reduce the viscosity of the coatings. In order to facilitate construction, acrylic monomers are generally used as reactive diluents. However, these monomers have small molecular weights and shrinkage after curing into a film, which increases the internal stress of the optical fiber coating and makes the optical fiber coating brittle; in addition, both acrylic prepolymers and acrylic es...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/07C09D183/08C08G77/20C08G77/28
Inventor 青双桂黄孙息王汝柯
Owner GUILIN ELECTRICAL EQUIP SCI RES INST
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