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Silicone rubber composite material as well as preparation method and application thereof

A technology of composite materials and silicone rubber, which is applied in the direction of rubber insulators, rubber layered products, chemical instruments and methods, etc., can solve the problems of low strength, achieve the effects of increasing compactness, avoiding early curing, and good puncture resistance

Pending Publication Date: 2021-12-07
CHANGLAN CABLE ACCESSORIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, moisture-cured silicone rubber materials have very low strength before curing, and must avoid contact with air and moisture, so the general layered composite method of polymer and fiber fabric is not applicable

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] This example prepares a kind of silicone rubber composite material, structure such as figure 1 as shown, figure 1 Among them, 1 is the first silicone rubber mastic layer, 2 is the second silicone rubber mastic layer, and 3 is the reinforcement layer. The concrete steps of preparation are:

[0072] Add 100kg of trialkoxy-terminated polydimethylsiloxane with a viscosity of 150000mP·s into the vacuum kneader, and then add 25kg of it with a specific surface area of ​​120mP 2 / g of hydrophobic fumed silica, 42kg of active light calcium carbonate, 35kg of decabromobiphenyl and 2kg of simethicone oil with a viscosity of 5000mPa·s, mixed at 70°C for 1 hour.

[0073] Turn on the vacuum until the pressure inside the kneader is -0.098MPa, continue kneading for 1.5 hours, then raise the temperature to 125°C, and continue kneading until the Mooney viscosity of the rubber compound in the kneader reaches 15 (55°C, 1+4min).

[0074] Cool the mixed rubber to below 60°C, add 2.5kg met...

Embodiment 2

[0078] This embodiment has prepared a kind of silicone rubber composite material, and the concrete steps of preparation are:

[0079] Add 100kg of trialkoxy-terminated polydimethylsiloxane with a viscosity of 200000mP·s into the vacuum kneader, and then add 20kg of it with a specific surface area of ​​240mP 2 / g of hydrophobic fumed silica, 35kg of active light calcium carbonate, 35kg of decabromobiphenyl and 2kg of simethicone oil with a viscosity of 5000mPa·s were kneaded at 80°C for 1.5 hours.

[0080] Turn on the vacuum until the pressure inside the kneader is -0.098MPa, continue kneading for 1.5 hours, then raise the temperature to 125°C, and continue kneading until the Mooney viscosity of the rubber compound in the kneader reaches 15 (55°C, 1+4min).

[0081] Cool the mixed rubber to below 60°C, add 2.0kg of methyltrimethoxysilane, 1.6kg of 3-(2,3-epoxypropoxy)propyltrimethoxysilane and 1.5kg of kg of tetra-n-butyl titanate, after kneading at 55°C for 1 hour, the Mooney ...

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Abstract

The invention provides a silicone rubber composite material as well as a preparation method and application thereof. According to the silicone rubber composite material, a first silicone rubber plaster layer and a second silicone rubber plaster layer provide excellent moldability and moisture self-curing capability. After being cured, the silicone rubber composite material has relatively high tensile strength and excellent electrical insulation performance, water resistance and weather resistance. The strength and the volume resistivity are not greatly reduced within the shelf life and along with the prolonging of the placement time. The reinforcing layer has excellent insulating property. According to the structural design that the first silicone rubber plaster layer, the reinforcing layer and the second silicone rubber plaster layer are sequentially stacked, the composite material has moldability and certain puncture resistance before being in contact with water vapor to be cured, the mechanical strength after curing is improved, and the composite material is suitable for wrapping matrixes with irregular structures such as sharp corners and spikes.

Description

technical field [0001] The invention belongs to the technical field of insulating materials, and in particular relates to a silicone rubber composite material and its preparation method and application. Background technique [0002] Urban power supply lines of 10kV and below are usually interspersed in urban living areas, and their clamps, electrical connection points and some overhead bare wires need to maintain a certain electrical safety distance from the surrounding environment to ensure personal safety around the line and the stability of the line itself run. In some scenarios where the electrical safety distance is insufficient, it is necessary to implement local insulation treatment on the transmission line. [0003] Insulating tape wrapping is a common method for partial insulation treatment, but 10kV power supply lines are usually placed in outdoor conditions, and most insulating tapes such as polyurethane, polyvinyl chloride, and ethylene-propylene rubber tapes ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B25/10B32B25/20B32B25/08B32B27/34B32B17/02B32B17/06C08L83/04C08K13/04C08K7/26C08K3/26C08K5/03H01B3/28H01B3/18H01B3/48
CPCB32B25/10B32B25/20B32B25/08B32B27/34B32B5/02C08L83/04H01B3/28H01B3/18H01B3/48B29C48/21B32B2262/101C08K2201/006C08K13/04C08K7/26C08K3/26C08K5/03
Inventor 贺志文赵志李颖郝玉义吴瑞清
Owner CHANGLAN CABLE ACCESSORIES
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