Phenyl polysiloxane containing hydrogen and preparation method thereof

A technology of hydrogen polysiloxane and methyl hydrogen cyclosiloxane is applied in the field of phenyl hydrogen polysiloxane and its preparation, which can solve the problems of low viscosity and high viscosity, and achieve the effect of low viscosity characteristics

Inactive Publication Date: 2015-11-25
上海爱世博有机硅材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phenyl hydrogen-containing polysiloxane as an encapsulation material requires a high phenyl content to provide excellent refractive properties and a low viscosity to facilitate operation, but too many phenyl unit chains will Higher viscosity of the system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] i). 75 parts of bis-diphenylmethyl-terminated methylphenyl polysiloxane, 20 parts of methylhydrogencyclotetrasiloxane, 6 parts of tetramethyldihydrodisiloxane, catalyst 3 Parts, added to the reactor, fully stirred and mixed evenly;

[0020] ii). Slowly raise the temperature to 85°C, and stir for 9 hours. After the reaction is completed, cool down and filter out the solid cation exchange resin;

[0021] iii). Distillation under reduced pressure, the temperature was slowly raised to 65° C., the vacuum degree was 750 mmHg, and the time was 0.5 hours. After the reaction is completed, it is cooled and discharged.

[0022] The technical indicators of the phenyl hydrogen-containing polysiloxane prepared by the present invention are as follows:

[0023] Appearance: colorless transparent liquid

[0024] Viscosity (25°C): 95mPa.S

[0025] Refractive index (25°C): 1.5429

[0026] Hydrogen content (%): 0.23%

Embodiment 2

[0028] i). 75 parts of bis-diphenylmethyl-terminated methylphenyl polysiloxane, 30 parts of methylhydrogen cyclotetrasiloxane, 7 parts of tetramethyldihydrodisiloxane, catalyst 3 Parts, added to the reactor, fully stirred and mixed evenly;

[0029] ii). Slowly raise the temperature to 85°C, and stir for 10 hours. After the reaction is completed, cool down and filter out the solid cation exchange resin;

[0030] iii). Distillation under reduced pressure, slowly warming up to a temperature of 70° C., a vacuum degree of 750 mmHg, and a time of 0.5 hours. After the reaction is completed, it is cooled and discharged.

[0031] The technical indicators of the phenyl hydrogen-containing polysiloxane prepared by the present invention are as follows:

[0032] Appearance: colorless transparent liquid

[0033] Viscosity (25°C): 75mPa.S

[0034] Refractive index (25°C): 1.5318

[0035] Hydrogen content (%): 0.37%

Embodiment 3

[0037] i). Add 80 parts of methyl-terminated methylphenylpolysiloxane, 23 parts of methylhydrogencyclopentasiloxane, 7 parts of tetramethyldihydrodisiloxane, and 2 parts of catalyst to the reaction In the container, stir thoroughly to mix evenly;

[0038] ii). The temperature was raised slowly to 85°C, and the reaction was stirred for 12 hours. After the reaction is completed, cool down and filter out the solid cation exchange resin;

[0039] iii). Distill under reduced pressure, slowly raise the temperature to a temperature of 65° C., and a vacuum degree of 730 mmHg for 1 hour. After the reaction is completed, it is cooled and discharged.

[0040] The technical indicators of the phenyl hydrogen-containing polysiloxane prepared by the present invention are as follows:

[0041] Appearance: colorless transparent liquid

[0042] Viscosity (25°C): 116mPa.S

[0043] Refractive index (25°C): 1.5405

[0044] Hydrogen content (%): 0.29%

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Abstract

The invention relates to phenyl polysiloxane containing hydrogen and a preparation method thereof, the phenyl polysiloxane containing hydrogen is prepared by using 60 to 80 parts of methyl phenyl polysiloxane, 20 to 35 parts of methylhydracyclosiloxane, 5 to 8 parts of end-capping reagent tetramethyl dihydro disiloxane, and taking cation exchange resin as a catalyst. The process route is simple and convenient, economic and environment friendly and raw materials are easy to obtain. The prepared phenyl polysiloxane containing hydrogen by utilizing the technology has the usability of high phenyl content, good transparency, high refraction coefficient and excellent usability.

Description

[technical field] [0001] The invention relates to the technical field of a phenyl hydrogen-containing polysiloxane and a preparation method thereof. [Background technique] [0002] With the continuous improvement of power LED manufacturing technology, its luminous efficiency, brightness and power have been greatly improved, and the requirements for packaging materials are also getting higher and higher. It is required that the outer packaging materials maintain high transparency in the visible light region. At the same time, it can have a high absorption rate for ultraviolet rays to prevent the leakage of ultraviolet rays. Traditional packaging materials can no longer fully meet the packaging requirements of LEDs. The phenyl silicone encapsulant with hydrogen-containing phenylpolysiloxane as the crosslinking agent has the characteristics of good formability, product transparency, high refractive index, high strength, and low shrinkage, and has become the focus of research an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/12C08G77/06
Inventor 黄新武章基凯刘旭军俞富春苗承刚
Owner 上海爱世博有机硅材料有限公司
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