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Insulating silicone rubber, semiconductive silicone rubber, a cable head casing pipe and a preparing method

A technology of raw silicone rubber and insulating silicon, applied in the field of silicone rubber, can solve the problems of poor cable contact and easy combustion, and achieve the effects of good molding performance, good flame retardancy, and reduced production costs.

Inactive Publication Date: 2017-10-24
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides insulating silicone rubber, semi-conductive silicone rubber, cable head bushing and a preparation method to solve the problem that the cable head bushing made of existing rubber materials is easy to burn when faults such as poor cable contact, partial discharge fault or internal overheating occur. question

Method used

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  • Insulating silicone rubber, semiconductive silicone rubber, a cable head casing pipe and a preparing method
  • Insulating silicone rubber, semiconductive silicone rubber, a cable head casing pipe and a preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] An embodiment of the present invention provides an insulating silicone rubber. The raw materials of the insulating silicone rubber include:

[0050] 100 parts of raw silicone rubber, 20 parts of modified white carbon black, 8 parts of structure control agent, 40 parts of glass powder, 30 parts of vitrified powder, 40 parts of flame retardant, and 1.5 parts of vulcanizing agent.

[0051] An embodiment of the present invention provides a method for preparing insulating silicone rubber, which specifically includes:

[0052] S111: Put the methyl silicone rubber raw rubber into a kneader and masticate for 5 minutes.

[0053] S112: After the mastication of methyl silicone rubber raw rubber is completed, add fumed silica and hydroxyl silicone oil modified by silane coupling agent to the masticated methyl silicone rubber raw rubber, and the temperature in the kneader is 60 Mix for 15 minutes under the condition of ℃ to form masterbatch;

[0054] S113: Add borosilicate glass p...

Embodiment 2

[0071] An embodiment of the present invention provides an insulating silicone rubber. The raw materials of the insulating silicone rubber include:

[0072] 100 parts of raw silicone rubber, 18 parts of modified white carbon black, 7 parts of structure control agent, 20 parts of glass powder, 5 parts of vitrified powder, 10 parts of flame retardant, and 1.5 parts of vulcanizing agent.

[0073] The embodiment of the present invention provides a method for preparing insulating silicone rubber, and the preparation steps of the method are the same as those in Embodiment 1. Among them, the modified silica is precipitated silica modified by silane coupling agent, the structure control agent is hydroxyl silicone oil and hexamethyldisilazane, the glass powder is bismuth oxide glass powder, and the vitrified powder is silica fume stone, the flame retardant is magnesium hydroxide and chloroplatinic acid, and the vulcanizing agent is double 25 vulcanizing agent. After testing, the Shore ...

Embodiment 3

[0079] An embodiment of the present invention provides an insulating silicone rubber. The raw materials of the insulating silicone rubber include:

[0080] 100 parts of raw silicone rubber, 30 parts of modified white carbon black, 10 parts of structure control agent, 50 parts of glass powder, 25 parts of porcelain powder, 40 parts of flame retardant, and 2 parts of vulcanizing agent.

[0081] An embodiment of the present invention provides a method for preparing insulating silicone rubber, which specifically includes:

[0082] S311: Put the methyl vinyl silicone rubber raw rubber into a kneader for mastication for 10 minutes.

[0083] S312: After the mastication of raw methyl vinyl silicone rubber, add precipitated silica and hexamethyldisilazane modified by titanate coupling agent to the masticated methyl vinyl silicone rubber In the raw rubber, knead for 10 minutes at a temperature of 80°C in a kneader to form a masterbatch;

[0084] S313: Add borate oxide glass powder, mi...

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Abstract

Insulating silicone rubber, semiconductive silicone rubber, a cable head casing pipe and a preparing method are provided. Ceramic powder allows the insulating silicone rubber to form hard ceramic protection in high-temperature or firing state, thus playing a function of isolating flame. A flame retardant allows the thermal decomposition initial temperature of the insulating silicone rubber to exceed 400 DEG C, the limit oxygen index to exceed 30%, and the UL94 flame retardant grade to be the V-0 grade. On the basis of an insulating silicone rubber raw material, the semiconductive silicone rubber also includes a conductive filler. Through adding the conductive filler, the semiconductive silicone rubber has characteristics of the insulating silicone rubber and also has a conductive characteristic. An inner core layer and an outer skin layer of the cable head casing pipe are prepared from the semiconductive silicone rubber, and an insulating layer is prepared from the insulating silicone rubber. The cable head casing pipe has good thermal stability, flame retardance and conductivity, and can perform insulating protection on a cable connector so as to ensure safe operation of power supply equipment.

Description

technical field [0001] The invention relates to the technical field of silicone rubber, in particular to an insulating silicone rubber, a semiconductive silicone rubber, a cable head sleeve and a preparation method. Background technique [0002] Load centers such as residential quarters, large public buildings, and factories and enterprises are equipped with distribution substations or substations. Distribution substations or substations can provide suitable voltage and current for residents or enterprises and institutions. The branch circuit of the distribution station or substation is equipped with a ring main unit for power distribution from the main line to the outside. The ring network cabinet is an air-insulated or gas-insulated high-voltage electrical combination equipment with load switches and fuses as the core components. The ring main unit has the advantages of simple structure, small size, low price, and can improve power supply parameters and performance, so i...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L83/07C08L83/06C08K13/06C08K9/06C08K9/04C08K3/36C08K3/40C08K3/34C08K3/04C08K7/06H01B3/28H01B1/24H01B17/58H01B17/60H01R4/70
CPCC08K3/04C08K3/34C08K3/346C08K3/36C08K3/40C08K7/06C08K9/04C08K9/06C08K13/06C08K2201/001C08L83/04C08L2201/02C08L2201/08C08L2201/22C08L2203/20C08L2205/02H01B1/24H01B3/28H01B17/583H01B17/60H01R4/70C08L83/06
Inventor 何程朱兴柯常亚东熊浩周年荣毛天杨俊坤仝子靖
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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