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Silicone rubber prepared from organosilicon low-boiling hydrolysate, and preparation method thereof

A technology of organosilicon and silicone rubber, which is applied in the field of silicone rubber prepared by using organosilicon low-boiling hydrolyzate and its preparation, can solve the problems of low reuse rate, high demand, consumption, etc., and achieve enhanced mechanical properties and reduced production cost effect

Active Publication Date: 2018-01-19
SHANDONG DONGYUE ORGANIC SILICON MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the close boiling point of each component, it is difficult to separate and utilize
[0004] Sun Feng pointed out in "Research Progress on Organosilicon Low Boilers" that there are two treatment methods for organosilicon low boilers. One is the rectification and purification method. 2 SiHCl boiling point gap to purify Me 2 SiMe 2 SiHCl, the main disadvantage of this technology at present is that the separation of these low boiler components requires a very high fractionation tower, which consumes a lot of energy and only purifies one important component
The second is the redistribution method. The principle of the redistribution method to prepare monosilane is to use the methyl-rich component in the organic silicon low boiler and the chlorine-rich component in the methylchlorosilane to generate Si-Cl and Si under high temperature and Lewis acid catalysis. -Me displacement reaction, and cracking of high boilers into monosilane; disproportionation reaction occurs between cracked monosilane and low boilers, and converted into valuable silane monomers, such as Me 2 SiCl 2 、Me 3 SiCl, the current main disadvantage of this process is that it needs to consume a lot of catalysts, these catalysts are covered by cracking products, the recycling rate is very low, and the redistribution reaction is often completed at higher temperature and pressure

Method used

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  • Silicone rubber prepared from organosilicon low-boiling hydrolysate, and preparation method thereof
  • Silicone rubber prepared from organosilicon low-boiling hydrolysate, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of organosilicon low-boiling hydrolyzate: Take 500g of organosilicon low-boiler and put it into a 1000mL beaker, and add excess water to it. At this time, the chlorosilane contained in organosilicon low-boiler includes trichlorosilane, methyldichlorosilane, After dimethyl monochlorosilane is hydrolyzed, it is further cross-linked to form a white flocculent powder with a small density. The white flocculent powder is mainly Si-OH obtained after hydrolysis of Si-Cl, and Si-OH continues to cross-link in an acidic environment. Formed, the resulting mixture of white flocculent powder and water was separated and filtered with a Bush funnel, dried in an oven at 100°C, and retained for future use.

[0043] Set the temperature of the mill to 40°C, add 90 parts of methyl vinyl silicone rubber to the mill, then add 10 parts of vinyl silicone oil, add 60 parts of dried and ground silicone low-boiling hydrolyzate and nanocarbonic acid 60 parts of calcium are mixed evenly,...

Embodiment 2

[0045] Preparation of organosilicon low-boiling hydrolyzate: Take 500g of organosilicon low-boiler and put it into a 1000mL beaker, add excess water to it. At this time, the chlorosilanes contained in organosilicon low-boiler include trichlorosilane, methyldichlorosilane, After dimethyl monochlorosilane is hydrolyzed, it is further cross-linked to form a white flocculent powder with a small density. The white flocculent powder is mainly Si-OH obtained after hydrolysis of Si-Cl, and Si-OH continues to cross-link in an acidic environment. Formed, the resulting mixture of white flocculent powder and water is separated and filtered with a Bush funnel, dried in an oven at 150°C, and retained for future use.

[0046]Set the temperature of the mill to 40°C, add 100 parts of methyl vinyl silicone rubber to the mill; then, add 30 parts of dried and ground silicone low-boiling hydrolyzate and 20 parts of nano-calcium carbonate for mixing Uniformity, the amount of platinum catalyst added...

Embodiment 3

[0048] Preparation of organosilicon low-boiling hydrolyzate: Take 500g of organosilicon low-boiler and put it into a 1000mL beaker, and add excess water to it. At this time, the chlorosilane contained in organosilicon low-boiler includes trichlorosilane, methyldichlorosilane, After dimethyl monochlorosilane is hydrolyzed, it is further cross-linked to form a white flocculent powder with a small density. The white flocculent powder is mainly Si-OH obtained after hydrolysis of Si-Cl, and Si-OH continues to cross-link in an acidic environment. Formed, the resulting mixture of white flocculent powder and water is separated and filtered with a Bush funnel, dried in an oven at 120°C, and retained for future use.

[0049] Add 100 parts of vinyl silicone oil to the stirring tank of planetary mixer at room temperature, add 45 parts of dried and ground organic silicon low-boiling hydrolyzate and 40 parts of nano-calcium carbonate, stir and mix evenly, and the amount of platinum catalyst ...

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Abstract

The invention belongs to the technical field of silicone rubber preparation, and concretely relates to a silicone rubber prepared from organosilicon low-boiling hydrolysate, and a preparation method thereof. The silicone rubber prepared from organosilicon low-boiling hydrolysate is prepared from, by weight, 100 parts of vinyl polysiloxane, 20-60 parts of nanometer calcium carbonate, 30-60 parts ofthe organosilicon low-boiling hydrolysate, 1-6 ppm of a platinum catalyst and 0.1-6 ppm of an inhibitor. The preparation method is a catalyst-free low energy consumption method using the organosilicon low-boiling hydrolysate. The method enhances the mechanical performances of silicone rubber and greatly reduces the production cost of the silicone rubber without affecting the ageing speed of the rubber.

Description

technical field [0001] The invention belongs to the technical field of silicone rubber preparation, and in particular relates to a silicone rubber prepared by using organic silicon low-boiling hydrolyzate and a preparation method thereof. Background technique [0002] Along with the rapid expansion of domestic production scale of methyl chlorosilane, the output of its by-product organosilicon low boilers has also increased rapidly. The sharp increase in the inventory of organic silicon low boilers has brought great pressure to the environment and safety. [0003] When adopting the direct method to synthesize methylchlorosilane, except target product Me 2 SiCL 2 In addition, about 2% of organic silicon low boilers will be produced by-product. Silicone low boilers refer to silane mixtures with a boiling point below 40°C, mainly containing tetramethylsilicon (molecular formula: Si(CH 3 ) 4 ), trichlorosilane (molecular formula: SiHCl 3 ), Methyldichlorosilane (CH 3 Cl 2...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K3/26C08K5/5415
Inventor 王安营伊港毛宁张振玉宋超
Owner SHANDONG DONGYUE ORGANIC SILICON MATERIAL