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Silicone rubber as well as preparation method and application thereof

A technology of silicone rubber and inhibitor, applied in the direction of conductors, electrical components, circuits, etc., can solve the problems of large gaps between cable cores and water blocking failures, and achieve good viscoelasticity, avoid impact, and facilitate water blocking effects Effect

Inactive Publication Date: 2018-05-08
ZHEJIANG JOTEC NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3. It is not applicable to special-shaped conductors with seamless structure
For single-core cables and multi-core cables with small cross-sections, there is no problem with the above structure, but for multi-core cables with large cross-sections, due to the large gap between the cabled cores, when filling with water-blocking ropes, sometimes due to the resistance The water rope has no time to absorb water and expand, so the water resistance fails

Method used

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  • Silicone rubber as well as preparation method and application thereof
  • Silicone rubber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of A component

[0049] Disperse 100 parts of vinyl-terminated polydimethylsiloxane with a viscosity of 5000mPa.s and 4 parts of platinum catalyst evenly with a disperser, and obtain component A after defoaming.

Embodiment 2

[0051] Preparation of component B

[0052] Add 100 parts of vinyl-terminated polydimethylsiloxane with a viscosity of 50000mPa.s and 42 parts of MQ resin into the reaction kettle, stir for 10 minutes, heat up to 140°C, and keep it warm for 6 hours to obtain a colorless and transparent base material, which is cooled to room temperature. Transfer 100 parts of transparent base material into a high-speed disperser, add 0.36 parts of 0.5% hydrogen-containing silicone oil, 0.07 parts of inhibitor, rotate at 400-500 rpm, vacuumize to below -0.09MPa, and stir for 15 minutes to obtain component B1.

Embodiment 3

[0054] Add 100 parts of vinyl-terminated polydimethylsiloxane with a viscosity of 100000mPa.s and 42 parts of MQ resin into the reaction kettle, stir for 10 minutes, heat up to 140°C, and keep it warm for 6 hours to obtain a colorless and transparent base material, which is cooled to room temperature. Transfer 100 parts of transparent base material into a high-speed disperser, add 0.36 parts of 0.5% hydrogen-containing silicone oil, 0.07 parts of inhibitor, rotate at 400-500 rpm, vacuumize to below -0.09MPa, and stir for 15 minutes to obtain component B2.

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Abstract

The invention discloses silicone rubber as well as a preparation method and application thereof. The silicone rubber is addition silicone rubber, is in a liquid state at normal temperature, has fluidity, viscosity being 40000-300000mPa.s and the longitudinal water resistance in resisting the water pressure of 6MPa, can bear thermal ageing for 18h at the temperature of 95 DEG C and presents good viscoelasticity; and in addition, after the addition silicone rubber is vulcanized, the volume shrinkage is smaller than 0.2 percent, and the water resistance effect is facilitated. By adopting the silicone rubber provided by the invention to fill a cable gap, single heating and vulcanization are not needed; and when three-layer co-extrusion of cables is performed, the silicone rubber and an insulation layer are vulcanized at the same time, so that the operation technology is simplified, and the silicone rubber has a large market prospect.

Description

technical field [0001] The invention relates to the application field of silicone rubber materials, in particular to a silicone rubber, its preparation method and its application in submarine cable conductors. Background technique [0002] 1. Development prospects and technical difficulties of submarine cables [0003] Submarine cables are cables laid on the seabed and underwater in rivers, and are divided into submarine communication cables and submarine power cables. Submarine power cables are mainly used for underwater transmission of high-power cables, which have the same function as underground power cables, but the application occasions and laying methods are different. They are mainly used to connect land and islands, across rivers or harbors, and from land Drilling platforms or interconnections between drilling platforms, etc. Under normal circumstances, the use of submarine cables to transmit electric energy is undoubtedly more expensive than overhead cables of th...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08L83/05C08K9/06C08K3/36H01B7/18
CPCC08L83/04C08L2203/202C08L2205/025C08L2205/035H01B7/1895C08K9/06C08K3/36
Inventor 吴娟施建丰叶德芳
Owner ZHEJIANG JOTEC NEW MATERIAL TECH