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High-velocity phenylmethyl silicone oil and preparation method thereof

A technology of phenylmethyl silicone oil and high viscosity, which is applied in the chemical industry, can solve the problems of low viscosity and difficult control of viscosity, and achieve the effect of controllable viscosity, good uniformity and high quality

Inactive Publication Date: 2016-08-03
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the prior art, the invention provides a kind of high-viscosity benzyl silicone oil and its preparation method, and described this high-viscosity benzyl silicone oil and its preparation method will solve the problem of preparing benzene in the prior art. In the process of methyl silicone oil, the viscosity is not easy to control, and the technical problem of low viscosity

Method used

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  • High-velocity phenylmethyl silicone oil and preparation method thereof
  • High-velocity phenylmethyl silicone oil and preparation method thereof
  • High-velocity phenylmethyl silicone oil and preparation method thereof

Examples

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Embodiment 1

[0033] In a reactor, 40 parts of octaphenylcyclotetrasiloxane was dissolved in 100 parts of octamethylcyclotetrasiloxane at 85°C, and the dissolved system was dehydrated at -0.09MPa and 40°C for 1 hour. Then the temperature of the system was raised to 90°C, 1.4 parts of tetramethylammonium hydroxide silicon alkoxide was added, and the reaction was carried out at -0.09MPa. Under online viscosity measurement, when the viscosity of the system rises faster, add 7.5 parts of hexamethyldisiloxane, and continue to react at 90°C under normal pressure for 2 hours. After the reaction, the temperature of the reaction system was raised to 150° C. to decompose (inactivate) tetramethylammonium hydroxide silicon alkoxide for 30 minutes. Then remove low-molecular compounds at 180°C and -0.09MPa for 30 minutes, cool down and filter the material to obtain high-viscosity benzyl silicone oil. After measurement, the product has a refractive index of 1.4948, a viscosity of 2060 mPa·s, and a visibl...

Embodiment 2

[0036] In a reactor, 40 parts of octaphenylcyclotetrasiloxane was dissolved in 100 parts of octamethylcyclotetrasiloxane at 90°C, and the dissolved system was dehydrated at -0.09MPa and 30°C for 2 hours. Then the system was heated up to 95°C, 1.4 parts of tetramethylammonium hydroxide silicon alkoxide was added, and the reaction was carried out at -0.09MPa. Under online viscosity measurement, when the viscosity of the system increases rapidly, add 5 parts of hexamethyldisiloxane, and continue to react at 95°C under normal pressure for 1 hour. After the reaction, the temperature of the reaction system was raised to 150° C. to decompose (inactivate) tetramethylammonium hydroxide silicon alkoxide for 30 minutes. Then remove low-molecular compounds at 180°C and -0.09MPa for 30 minutes, cool down and filter the material to obtain high-viscosity benzyl silicone oil. After measurement, the product has a refractive index of 1.4997 and a viscosity of 4990mPa·s.

Embodiment 3

[0038] In a reactor, 40 parts of octaphenylcyclotetrasiloxane was dissolved in 90 parts of octamethylcyclotetrasiloxane at 87°C, and the dissolved system was dehydrated at -0.09MPa and 40°C for 1 hour. Then the system was heated up to 85°C, 1.3 parts of tetramethylammonium hydroxide silicon alkoxide was added, and the reaction was carried out at -0.09MPa. Under online viscosity measurement, when the viscosity of the system rises faster, add 2.5 parts of hexamethyldisiloxane, and continue to react at 85° C. under normal pressure for 3 hours. After the reaction, the temperature of the reaction system was raised to 150° C. to decompose (inactivate) tetramethylammonium hydroxide silicon alkoxide for 50 minutes. Then remove low-molecular compounds at 170°C and -0.09MPa for 40 minutes, cool down and filter the material to obtain high-viscosity benzyl silicone oil. After measurement, the product has a refractive index of 1.5052 and a viscosity of 6000mPa·s.

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Abstract

The invention provides a high-viscosity benzyl silicone oil, which comprises 30 to 50 parts of octaphenylcyclotetrasiloxane; 80 to 100 parts of octamethylcyclotetrasiloxane; 1.1 to 100 parts by weight. 1.5 parts of tetramethylammonium hydroxide silicon alkoxide; 1-10 parts of hexamethyldisiloxane. 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 quality, high refractive index, high and controllable viscosity, and can be applied to 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 and many other fields.

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 temperature resistance, radiation resistance, lubricity, and high refractive index. The rotational viscosity of high-viscosity benzyl silicone oil can reach more than 1000mPa·s. 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 ele...

Claims

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Application Information

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IPC IPC(8): C08G77/06C08G77/04
CPCC08G77/06C08G77/04
Inventor 吴蓁周亦文郭青何辛王立伟张英强
Owner SHANGHAI INST OF TECH
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