A kind of loaded silicone rubber anti-tracking agent and its preparation method and application

A technology of resistance to tracking and silicone rubber, applied in the field of silicone rubber modification additives and silicone rubber electrical insulation, can solve the problems of damaging the mechanical properties and other properties of silicone rubber, affecting the stability of silicone rubber performance, and easy migration of small molecule additives. , to achieve the effect of enhancing synergistic catalytic activity, improving mechanical properties, and improving the tracking resistance of silicone rubber

Active Publication Date: 2020-12-01
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, inorganic fillers are usually added in large amounts (above 40wt%), which will greatly damage the mechanical properties and other properties of silicone rubber.
The compatibility between organic additives and silicone rubber is not good, there is a problem of poor dispersion, and small molecule additives are easy to migrate, all of which affect the performance stability of silicone rubber during long-term service, and there are certain safety hazards

Method used

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  • A kind of loaded silicone rubber anti-tracking agent and its preparation method and application
  • A kind of loaded silicone rubber anti-tracking agent and its preparation method and application
  • A kind of loaded silicone rubber anti-tracking agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] With 20g fumed silica (specific surface area 300m 3 / g) was dispersed in 300 g of distilled water, 4 g of γ-aminoethylaminopropyl triethoxysilane was added, and stirred at 70° C. for 8 hours. Then cooling, suction filtration, ethanol washing and vacuum drying for 8 hours to obtain modified gas phase white carbon black. Disperse modified fumed silica and 0.5 g of isopropanol solution of chloroplatinic acid (platinum content 3000 ppm) into 100 g of absolute ethanol, and react under nitrogen protection at 70° C. for 6 hours with stirring. Cooling, suction filtration, washing, and vacuum drying for 8 hours to obtain a loaded silicone rubber anti-tracking agent.

[0035] 90 parts by mass of methyl vinyl silicone rubber (molecular weight: 560,000) with a vinyl content of 0.06 mol%, 10 parts by mass of methyl vinyl silicone rubber with a vinyl content of 1 mol% (molecular weight: 600,000), 40 parts by mass of fumed silica (Specific surface area 300m3 / g), 8 parts by mass of h...

Embodiment 2

[0038] Disperse 4g of aminopropyltrimethoxysilane in 50g of toluene, add 0.5g of divinyltetramethyldisiloxane complex of chloroplatinic acid (platinum content 3000ppm), and stir the reaction under nitrogen protection and 70°C After 6 hours, a complex compound of nitrogen-containing silane and platinum was obtained. Then 20g fumed silica (specific surface area 200m 3 / g) Disperse in 200g of toluene, transfer the complex of nitrogen-containing silane and platinum to the toluene solution of the above-mentioned fumed silica, and stir and react under nitrogen protection at 70°C for 8 hours. Then cooling, suction filtration, washing, and vacuum drying for 8 hours, the finished product 2 of Example was obtained.

Embodiment 3

[0040] With 20g fumed silica (specific surface area 150m 3 / g) was dispersed in 300 g of distilled water, 4 g of aminopropyltriethoxysilane was added, and stirred at 70° C. for 8 hours. Then cooling, suction filtration, ethanol washing and vacuum drying for 8 hours to obtain modified gas phase white carbon black. Disperse the modified fumed silica and 0.5g of divinyltetramethyldisiloxane complex of chloroplatinic acid (platinum content 3000ppm) into 100g of toluene, and react with stirring under nitrogen protection and 70°C for 6 hours . Then cooling, suction filtration, washing, and vacuum drying for 8 hours, the finished product 3 of Example was obtained.

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Abstract

The invention discloses a supported silicon rubber electric-leakage-resistance tracking agent and a preparation method and application thereof. The method comprises the steps that firstly, a silane coupling agent is prepared for modifying white carbon black, then a platinum compound is added, and finally the supported silicon rubber electric-leakage-resistance tracking agent is obtained through washing and vacuum drying. Platinum and the nitrogenous silane coupling agent are subjected to complexation and supported on the white carbon black, the cooperative catalytic activity of platinum and nitrogenous silane can be effectively improved, and accordingly platinum and the nitrogenous silane coupling agent are evenly and stably dispersed in silicon rubber; through complexation of platinum andthe nitrogenous silane coupling agent, the cooperative catalytic effect of platinum and the nitrogenous silane coupling agent is improved, white carbon black is used as common reinforcement filler ofsilicone rubber, a silicone rubber molecular chain is adsorbed on the surface of white carbon black through a hydrogen-bond effect, the mechanical property of silicone rubber is improved, a cross-linking reaction, for catalyzing the silicone rubber molecular chain, of platinum and the nitrogenous silane coupling agent under the effect of arc discharging is also conveniently conducted, a compact protection layer is formed, and arc erosion is avoided. According to the supported silicon rubber electric-leakage-resistance tracking agent, the electric-leakage-resistance tracking performance of silicone rubber can be obviously improved, the raw materials are low in price, and the agent is easy to prepare and can be applied to industrial production.

Description

technical field [0001] The invention relates to the fields of silicone rubber modification additives and silicone rubber electrical insulation, in particular to the modification of silicone rubber tracking resistance agents, in particular to a loaded silicone rubber tracking resistance agent and its preparation method and application. Background technique [0002] The development of power system promotes the continuous replacement of insulating materials. At present, silicone rubber has become one of the insulating materials with the most development potential and application prospects in the field of high-voltage insulation due to its excellent electrical insulation properties, weather resistance, flame retardant properties, hydrophobicity and hydrophobic recovery properties. However, during the use of silicone rubber insulating materials, the surface will be polluted by dust, dew, fog, rainwater, etc. in the environment. With arc discharge, it leads to tracking and corros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/12C08K9/06C08K9/04C08K3/36C08L83/07C08L83/04C08L83/05C08K5/14
CPCC08K3/36C08K9/04C08K9/06C08K9/12C08K2201/006C08K2201/014C08L83/04C08L2205/025C08L2205/035C08K5/14
Inventor 陈宛涓曾幸荣潘志杰赖学军李红强曹诗林
Owner FOSHAN UNIVERSITY
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