Fire-resistant silicon rubber and preparation method thereof and cable
A technology of silicone rubber and silicone rubber insulating layer, which is applied in the direction of insulating cables, rubber insulators, cables, etc., can solve the problems of high cost, high construction requirements, and poor cable bending performance, so as to reduce life and property losses and achieve huge economic benefits. and social benefits, the effect of stable fire resistance
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Embodiment 1
[0056] Prepare refractory silicone rubber raw materials according to formula 1 in Table 1.
[0057] The preparation method of refractory silicone rubber is as follows:
[0058] (1) Mix 500 kg of methyl vinyl silicone rubber on an internal mixer for 5 minutes, then add 5 kg of hydrogen-containing silicone oil and 20 kg of hydroxyl silicone oil, and mix evenly;
[0059] (2) Add fumed white carbon black 100kg and silicon micropowder 100kg in the mixed rubber obtained in (1), mix for 30 minutes, and make high-tear high-strength silicone rubber mixed rubber;
[0060] (3) Add nano-montmorillonite 150kg and silicon carbide 100kg in the mixed rubber obtained in (2), mix 20 minutes;
[0061] (4) heat-treating the mixed rubber obtained in (3) at 180° C. for 1 hour, and then cooling;
[0062] (5) The rubber material obtained in (4) was remilled for the second time, and 5 kg of vulcanizing agent 2,4-dichlorobenzoyl and 0.05 kg of chloroplatinic acid were added to obtain a refractory sil...
Embodiment 2
[0067] Prepare refractory silicone rubber raw materials according to formula 2 in Table 1.
[0068] The preparation method of refractory silicone rubber is as follows:
[0069] (1) Mix 400 kg of methyl vinyl silicone rubber on an internal mixer for 5 minutes, then add 4 kg of hydrogen-containing silicone oil and 16 kg of hydroxyl silicone oil, and mix evenly;
[0070] (2) Add fumed white carbon black 80kg and silicon micropowder 120kg in the mixed rubber obtained in (1), and mix for 30 minutes to obtain high-tear high-strength silicone rubber mixed rubber;
[0071] (3) Add nano-montmorillonite 200kg and silicon carbide 100kg in the mixed rubber obtained in (2), and mix for 15 minutes;
[0072] (4) heat-treating the mixed rubber obtained in (3) at 180° C. for 1 hour, and then cooling;
[0073] (5) The rubber material obtained in (4) was remilled for the second time, and 4kg of vulcanizing agent 2,4-dichlorobenzoyl and 0.05kg of chloroplatinic acid were added to obtain a refra...
Embodiment 3
[0078] Prepare refractory silicone rubber raw materials according to formula 3 in Table 1.
[0079] The preparation method of refractory silicone rubber is as follows:
[0080] (1) Mix 500 kg of methyl vinyl silicone rubber on an internal mixer for 6 minutes, then add 8 kg of hydrogen-containing silicone oil and 10 kg of hydroxyl silicone oil, and mix evenly;
[0081] (2) add fumed white carbon black 150kg and silicon micropowder 50kg in the mixed rubber obtained in (1), mix for 40 minutes, make the silicone rubber mixed rubber of high tearing strength;
[0082] (3) Add nano-montmorillonite 100kg and silicon carbide 150kg in the mixed rubber obtained in (2), mix for 12 minutes;
[0083] (4) heat-treating the mixed rubber obtained in (3) at 130° C. for 4 hours, and then cooling;
[0084] (5) The rubber material obtained in (4) was remilled for the second time, and 5 kg of vulcanizing agent 2,4-dichlorobenzoyl and 0.05 kg of chloroplatinic acid were added to obtain a refractor...
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