High-strength, thermo-oxidative-aging-resistant and insulating silicone rubber and preparation method thereof
A high-strength, insulating silicon technology, applied in the field of silicone rubber, can solve the problems of easy agglomeration, affect the mechanical properties and electrical insulation properties of dispersive silicone rubber, achieve simple modification process, improve mechanical properties and resist thermal oxidation aging Performance, good filling effect
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[0025] Example 1
[0026] The present invention provides a method for preparing high-strength heat-resistant oxygen-aging insulating silicone rubber, which includes the following steps:
[0027] 1) Aluminum hydroxide modification: take aluminum hydroxide (median particle size 2μm) according to mass ratio 2:4:4; aluminum hydroxide (median particle size 3μm); aluminum hydroxide (median particle size 4μm) Mix, then add 1% of the total mass of aluminum hydroxide KH-560 for modification, wherein the modification conditions are a stirring speed of 1000r / min, a temperature of 70°C, and a stirring time of 60min to obtain modified aluminum hydroxide;
[0028] 2) Calcium carbonate modification: take the specific surface area as 50m 2 / g of nano calcium carbonate, and then add 0.5% stearic acid by mass of nano calcium carbonate for modification, wherein the modification conditions are 1000r / min, temperature 60°C, and stirring time 60min to obtain modified nano calcium carbonate;
[0029] 3) Modi...
Example Embodiment
[0032] Example 2
[0033] 1) Modification of aluminum hydroxide: Take aluminum hydroxide (median particle size 2μm) according to mass ratio 4:2:4; aluminum hydroxide (median particle size 3μm); aluminum hydroxide (median particle size 4μm) Mix, then add KH-570 with 2% of the total mass of aluminum hydroxide for modification, wherein the modification conditions are a stirring speed of 1000r / min, a temperature of 80°C, and a stirring time of 75min to obtain modified aluminum hydroxide;
[0034] 2) Calcium carbonate modification: take the specific surface area as 65m 2 / g of nano calcium carbonate, and then add 1% lauric acid by mass of nano calcium carbonate to modify, wherein the modification conditions are the stirring speed of 1000r / min, the temperature of 70°C, and the stirring time of 75min to obtain the modified nano calcium carbonate;
[0035] 3) Modification of white carbon black by gas phase method: take the specific surface area as 175m 2 / g of vapor-phase white carbon black,...
Example Embodiment
[0038] Example 3
[0039] 1) Modification of aluminum hydroxide: take aluminum hydroxide (median particle size 2μm) according to mass ratio 4:4:2; aluminum hydroxide (median particle size 3μm); aluminum hydroxide (median particle size 4μm) Mix, and then add 3% of the total mass of aluminum hydroxide with vinyltrimethoxysilane for modification, wherein the modification conditions are a stirring speed of 1000r / min, a temperature of 90°C, and a stirring time of 90min to obtain modified aluminum hydroxide;
[0040] 2) Calcium carbonate modification: take the specific surface area as 80m 2 / g of nano calcium carbonate, and then add 1% oleic acid by mass of nano calcium carbonate to modify, wherein the modification conditions are a stirring speed of 1000r / min, a temperature of 80°C, and a stirring time of 90min to obtain modified nano calcium carbonate;
[0041] 3) Modification of white carbon black by gas phase method: take the specific surface area as 200m 2 / g of the gas phase method wh...
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