Silicone rubber composition and preparation method thereof

A silicone rubber composition and silicone rubber technology, applied in the field of composite insulators, can solve the problems of lack of practical use value, lower product performance, high D4 content, etc., achieve good interface bonding force and compatibility, reduce material costs, and store energy The effect of high modulus

Inactive Publication Date: 2020-01-21
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment of silicone rubber in decommissioned composite insulators is mainly through chemical cracking or thermal cracking to realize the recycling of organosiloxane compounds. However, the content of D4 in the cracking products of chemical cracking is high, and a large amount of waste liquid is generated, which is easy to cause secondary pollution. Secondary pollution; pyrolysis requires high temperature, many side reactions, and low yield
And composite insulator silicone rubber is a rubber material used in special environments. After special high-temperature vulcanization, radiation cross-linking and other processes, conventional treatment methods are not suitable, so it is necessary to find other simple and easy methods of processing composite insulator silicone rubber.
[0006] The use of silicone rubber composite insulator powder as a filler for EPDM has been reported in China, but the performance of the resulting product has been reduced and it lacks practical use value [Sun Bin, Cao Hongwei, Du Linjuan, etc. Modified waste silicone rubber composite insulator powder and ternary Research on properties of ethylene-propylene rubber (EPDM) blends[J].Journal of Beijing University of Chemical Technology (Natural Science Edition),2017,44(3):33-38.]

Method used

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  • Silicone rubber composition and preparation method thereof
  • Silicone rubber composition and preparation method thereof
  • Silicone rubber composition and preparation method thereof

Examples

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preparation example Construction

[0051] Another aspect of the present invention provides a method for preparing a silicone rubber composition, preferably a method for preparing the silicone rubber composition described in the first aspect of the present invention, the method comprising the following steps:

[0052] Step 1, recovering the silicone rubber of the decommissioned composite insulator, and obtaining the decommissioned composite insulator silicone rubber powder after treatment;

[0053] According to the present invention, in step 1, the retired composite insulator silicone rubber is waste composite insulator silicone rubber, and the retired composite insulator silicone rubber is recovered and added to the matrix material as a filler to prepare a composition. The retired composite insulator silicone rubber needs to be processed to obtain Retired composite insulator silicone rubber powder for better mixing with matrix materials.

[0054] In the present invention, there are many impurities on the surfac...

Embodiment 1

[0090] Recycling the silicone rubber of decommissioned composite insulators, cleaning with ethanol, slicing and pulverizing to obtain the decommissioned composite insulator silicone rubber powder;

[0091] Weigh 10g of decommissioned composite insulator silicone rubber powder, add it to 100g of room temperature curing silicone rubber, and add it to a high-speed stirrer after preliminary mixing. The stirring temperature is 25°C, the speed is 27000r / min, and the stirring time is 10min. Stir and mix evenly get the mixture;

[0092] The above mixture was poured into a mold, and placed in an environment of 25°C and 50% humidity to cure for 24 hours to obtain a cured intermediate product;

[0093] The cured intermediate product was removed from the mold, and placed in an environment of 25° C. and 50% humidity for 7 days.

Embodiment 2

[0095] The preparation process of Example 1 was repeated, the only difference being that 20g of decommissioned composite insulator silicone rubber powder was weighed, and the others were the same as in Example 1.

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Abstract

The invention discloses a silicone rubber composition and a preparation method thereof. The composition comprises composite insulator silicone rubber powder and room temperature cured silicone rubber,the composite insulator silicone rubber powder is obtained by processing retired composite insulator silicone rubber; preferably, the composite insulator silicone rubber powder is retired composite insulator silicone rubber powder modified by a coupling agent. The composition has good mechanical properties. The invention also provides a preparation method of the silicone rubber composition; the preparation method has the advantages of easily available raw materials, simple process, mild conditions and easy realization, and achieves the cyclic utilization of the retired composite insulator silicone rubber, so the material cost is reduced, the resources are saved, and the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of composite insulators, and relates to a recycling method for decommissioned composite insulator silicone rubber products, in particular to a silicone rubber composition and a preparation method thereof. Background technique [0002] With the progress of society, electricity has developed rapidly as the main energy source. Transmission lines all over the country can be seen everywhere. Among them, composite insulators have been used in large quantities or even in the entire line in AC operating lines of various voltage levels and new line projects, and silicone rubber composite insulators with excellent performance have been widely used. [0003] However, with the mass production and consumption of silicone rubber composite insulators, a large amount of composite insulator production waste, processing waste and leftover materials will also be generated. In addition, with the decommissioning of composite in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04
CPCC08L83/04C08L2201/08C08L2205/025C08L2207/20
Inventor 曹宏伟邱武斌庄清臣郭阳徐润华徐日炜
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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