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Preparation method for low hydrogen-containing silicon oil

A low-hydrogen-containing silicone oil and silicone oil technology, applied in the chemical industry, can solve the problems of corrosive equipment, great environmental hazards, difficult separation of catalysts, etc., and achieve the effects of high production efficiency, short time consumption, and continuous industrial production.

Inactive Publication Date: 2014-03-26
蓝星安迪苏股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported in the literature that sulfuric acid telomerization is used, the catalyst is not easy to separate, and it is corrosive to equipment and more harmful to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Add raw materials 25.4g 202 silicone oil, 174.6g DMC, 6gMM and 10.0g SO 4 2- / TiO 2 As a catalyst, heat up to 50°C with stirring for 1 hour, then continue to heat up to 90°C, polymerize for 4 hours, filter off the solid catalyst, gradually heat up to 160°C at -0.099 MPa, and remove low boiling substances. A colorless and transparent oily low-hydrogen silicone oil was obtained with a viscosity of 70.6 mm 2 / s, the catalyst can be reused 10 times, and the viscosity change is within 10%.

Embodiment 2

[0024] Example 2: Add raw materials 25.4g 202 silicone oil, 174.6g DMC, 6gMM and 10.0g SO 4 2- / TiO 2 -Fe 2 o 3 As a catalyst, heat up to 50°C under stirring for 1 hour, then continue to heat up to 90°C, polymerize for 5 hours, filter off the solid catalyst, gradually heat up to 160°C at -0.099 MPa, and remove low boilers. A colorless and transparent oily low-hydrogen silicone oil was obtained with a viscosity of 75.9 mm 2 / s, the catalyst can be reused about 10 times, and the viscosity change is within 10%.

Embodiment 3

[0025] Example 3: Add raw materials 25.4g 202 silicone oil, 174.6g DMC, 6gMM and 10.0g SO 4 2- / Fe 2 o 3 As a catalyst, heat up to 50°C under stirring for 1 hour, then continue to heat up to 90°C, polymerize for 5 hours, filter off the solid catalyst, gradually heat up to 160°C at -0.099 MPa, and remove low boilers. Obtain a colorless and transparent oily low-hydrogen silicone oil with a viscosity of 68.5 mm 2 / s, the catalyst can be reused about 10 times, and the viscosity change is within 10%.

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Abstract

The invention relates to the technical field of chemical engineering, in particular to a preparation method for low hydrogen-containing silicon oil. The preparation method adopts high hydrogen-containing silicon oil (202) and dimethylcyclosiloxane (DMC) as raw materials and hexamethyldisiloxane (MM) as an end-capping agent, under the catalysis of a solid superacid, the temperature is increased to 50-140 DEG C for a telomerization, and the low hydrogen-containing silicon oil is prepared. Compared with the prior art for preparing the low hydrogen-containing silicon oil under the catalysis of vitriol, the preparation method adopts the solid superacid as a catalyst, the catalyst has a good catalysis effect and can be reused, neutralization and washing are not required during the preparation method, and short time is taken by the whole preparation process, continuous method industrial production is likely to be achieved, and the production efficiency is high.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of low-hydrogen silicone oil. Background technique [0002] Hydrogen-containing silicone oil is one of the most important products among silicone oil varieties, and it is the starting material of many modified silicone oils. A variety of modified silicone oils can be obtained from the active group hydrogen in the main chain of siloxane, and many other active groups through hydrosilylation reaction, such as polyether modified silicone oil, epoxy modified silicone oil, long chain alkane base silicone oil, etc. Its notable feature is its good waterproof effect, and it can be cross-linked at low temperature to form a film, forming a waterproof layer on the surface of the material. It is used for waterproof treatment of fabrics, glass, ceramics, paper, leather, metal, building materials and other industries, and the effect is very good. [0003] Low-h...

Claims

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Application Information

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IPC IPC(8): C08G77/12C08G77/06
Inventor 吴艳金龚佑喜欧阳建松
Owner 蓝星安迪苏股份有限公司
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