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High-viscosity polymethylphenyl siloxane fluid and preparation method thereof

A technology of phenylmethyl silicone oil and diphenyldimethoxysilane, which is applied in the field of silicone oil, high-viscosity phenylmethyl silicone oil and its preparation, can solve the problems of environmental pollution and low viscosity of phenylmethyl silicone oil, and achieve good transparency , The phenyl arrangement is evenly distributed and the effect of high quality

Inactive Publication Date: 2016-10-12
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the prior art, the invention provides a kind of high-viscosity phenylmethyl silicone oil and its preparation method, and described this high-viscosity phenylmethyl silicone oil and its preparation method will solve the problem of benzene in the prior art. The viscosity of methyl silicone oil is low, and it is easy to cause technical problems of environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Add 30 parts of diphenyldimethoxysilane and 70 parts of dimethyldiethoxysilane into the reactor, stir and raise the temperature to 70°C, slowly add 0.1 parts of hydrochloric acid solution and 30.12 parts of The mixed solution configured with water, the mass fraction of the hydrochloric acid solution is 37%; 40 minutes drop; , standing and layering to obtain the hydrolyzate and water phase, take out the hydrolyzate in the lower layer, heat it up to 90°C, add 0.44 parts of tetramethylammonium hydroxide silicon alkoxide, reduce the pressure to -0.09MPa, and carry out the polymerization reaction 2 Hours; after the polymerization reaction is completed, the temperature is raised to 150°C to carry out the decomposition reaction of tetramethylammonium hydroxide silicon alkoxide, and the temperature is kept for 30 minutes, and then the low molecular compound is removed at 180°C and -0.09MPa for 30 minutes, the temperature is lowered, and the material is discharged That is, a hig...

Embodiment 2

[0058]Add 35 parts of diphenyldimethoxysilane and 65 parts of dimethyldiethoxysilane into the reactor, stir and raise the temperature to 70°C, slowly add 0.12 parts of hydrochloric acid solution and 30 parts of The mixed solution configured with water, the mass fraction of the hydrochloric acid solution is 37%; 40 minutes drop; , standing and layering to obtain the hydrolyzate and water phase, take out the hydrolyzate in the lower layer, raise the temperature to 95°C, add 0.42 parts of tetramethylammonium hydroxide silicon alkoxide, reduce the pressure to -0.09MPa, and carry out the polymerization reaction for 2.5 Hours; after the polymerization reaction is completed, the temperature is raised to 150°C to carry out the decomposition reaction of tetramethylammonium hydroxide silicon alkoxide, and the temperature is kept for 40 minutes, and then the low molecular compound is removed at 175°C and -0.09MPa for 35 minutes, the temperature is lowered, and the material is discharged ...

Embodiment 3

[0060] Add 40 parts of diphenyldimethoxysilane and 60 parts of dimethyldiethoxysilane into the reactor, stir and raise the temperature to 70°C, slowly add 0.09 parts of hydrochloric acid solution and 30.16 parts of The mixed solution configured with water, the mass fraction of the hydrochloric acid solution is 37%; 40 minutes drop; , standing and stratifying to obtain the hydrolyzate and water phase, take out the hydrolyzate in the lower layer, raise the temperature to 90°C, add 0.44 parts of tetramethylammonium hydroxide silicon alkoxide, reduce the pressure to -0.09MPa, and carry out the polymerization reaction 3 Hours; after the polymerization reaction is completed, the temperature is raised to 150°C to carry out the decomposition reaction of tetramethylammonium hydroxide silicon alkoxide, and the temperature is kept for 40 minutes, and then the low molecular compound is removed at 180°C and -0.09MPa for 30 minutes, the temperature is lowered, and the material is discharged ...

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Abstract

The invention provides a high-viscosity benzyl silicone oil, which comprises 30-60 parts of diphenyldimethoxysilane; 40-70 parts of dimethyldiethoxysilane; 0.06- 0.12 parts of hydrochloric acid solution; 30-30.5 parts of water; 0.42-0.56 parts of tetramethylammonium hydroxide silicon alkoxide. The present invention also provides a method for preparing the above-mentioned high-viscosity benzyl silicone oil. The high-viscosity benzyl silicone oil of the present invention has high viscosity and high refractive index, and can be applied to many fields such as the preparation of silicone grease, low-temperature lubricating oil, shock absorption of precision instruments, special radiation protection high heat carrier for nuclear power plants, and sealing under continuous high temperature.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a silicone oil, specifically a high-viscosity benzyl silicone oil and a preparation method thereof. Background technique [0002] Benzyl silicone oil is a product in which some methyl groups in methyl silicone oil are replaced by phenyl groups. It has the advantages of high refractive index, lubricity, high temperature resistance, and radiation resistance. Due to the high viscosity, this type of silicone oil is used in nuclear power plant special radiation protection, high heat carrier, and structural sealing under continuous high temperature. After use, the sealing structure is not easy to fall off, and the radioactive substances in it are not easy to leak; silicone grease prepared from this type of silicone oil It can be applied to heat conduction, sealing and lubricating carriers of electronic components, and the silicone oil in the silicone grease is not easy to separate out, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/08
CPCC08G77/08
Inventor 吴蓁周亦文郭青何辛王立伟高晟弢张英强
Owner SHANGHAI INST OF TECH
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