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A kind of high temperature resistant ceramic silicon rubber and its preparation method and application

A technology of high temperature resistant ceramics and siliconization, applied in the field of ceramicized silicone rubber, can solve the problems of reduced mechanical strength, difficult passage of fire-resistant cables, easy powdering and falling off, etc., and achieves good electrical properties and mechanical strength, good flexibility, high the effect of strength

Active Publication Date: 2021-08-17
SUZHOU JINQIANG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical strength of the mica layer in the mica tape-wrapped fire-resistant cable is greatly reduced after high-temperature ablation, and it is easy to pulverize and fall off after being shaken, which makes it difficult for the fire-resistant cable wrapped with mica tape to pass the BS6387:1994 test standard

Method used

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  • A kind of high temperature resistant ceramic silicon rubber and its preparation method and application
  • A kind of high temperature resistant ceramic silicon rubber and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Preparation of high-strength rubber compound:

[0047] Mix 100kg of methylvinyl silicone raw rubber with a vinyl content of 0.03% to 0.04%, 6kg of silanol silicone oil, 40kg of fumed silica, and 0.8kg of vinyltrimethoxysilane under high-speed stirring.

[0048] 2. Preparation of inorganic powder filler:

[0049] Mix 74kg of wollastonite, 7.3kg of magnesium hydroxide, 8.1kg of ZB zinc borate, and 8.1kg of nano-sized zinc oxide to obtain ceramic powder, and then mix the ceramic powder with 64kg of glaze powder (32kg of silicon dioxide, 19kg of aluminum oxide, calcium oxide 13kg) mixed to obtain inorganic powder filler.

[0050] 3. Preparation of ceramizable silicone rubber composition:

[0051] Knead and mix 146.8 kg of the high-strength rubber compound prepared in step 1 with 161.5 kg of inorganic powder filler prepared in step 2 according to the mass ratio of 1:1.1, heat to 70°C and mix for 2.5 hours, then raise the temperature to 140°C ℃, evacuate and continue kn...

Embodiment 2

[0057] The difference between this embodiment and Example 1 is that the preparation of the inorganic powder filler is as follows: 80 kg of wollastonite, 5 kg of magnesium hydroxide, 10 kg of ZB zinc borate, and 6 kg of nano-scale zinc oxide are uniformly mixed to obtain ceramic powder, and then the ceramic powder Mix it with 52kg of glaze powder (26kg of silicon dioxide, 15.5kg of aluminum oxide, and 10.5kg of calcium oxide) to obtain an inorganic powder filler.

Embodiment 3

[0059] The difference between this embodiment and embodiment 1 is: 100 kg of methyl vinyl silicone raw rubber with a vinyl content of 0.03% to 0.04%, 6 kg of silanol silicone oil, 45 kg of fumed silica, 1 kg of vinyltrimethoxysilane, Mix well under high speed stirring.

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Abstract

The invention relates to ceramic silicon rubber, and specifically discloses a high-temperature-resistant ceramic silicon rubber, a preparation method and application thereof. The invention mixes the high-strength rubber compound, the inorganic powder filler and the vulcanizing agent to prepare a ceramizable silicone rubber composition, and then passes the ceramizable silicone rubber composition and the glass cloth treated with the silicon-acrylic emulsion through calendering. Process compounding, and then baked and vulcanized at 115-125°C to obtain a high-temperature-resistant ceramic silicone rubber with high strength and good flexibility, which can directly replace mica tape for the manufacture of refractory cables, and wrap No dust pollution will be generated during the process; the cable wrapped by it is ablated for 3 hours in a flame at 650-950°C, and the line can still work normally, and a ceramic-like high-hardness shell is formed after ablation, and the shell has good Electrical properties and mechanical strength, the circuit can still work normally under high-intensity vibration and water shower, has higher flame retardancy, and can be used in the manufacture of advanced fire-resistant cables.

Description

technical field [0001] The invention relates to ceramic silicone rubber, in particular to high temperature resistant ceramic silicone rubber and a preparation method thereof. Background technique [0002] At present, the common fire-resistant cables in China mainly include magnesium oxide fire-resistant cables, ceramic silicone rubber fire-resistant cables and mica tape wrapped fire-resistant cables. [0003] Magnesium oxide fire-resistant cables have excellent fire-resistant performance, but their manufacturing process is complicated, the production cost is high, the manufacturing length is limited, the cables are hard and difficult to bend, the joints are complicated, the construction is difficult, and it is difficult to be widely used. [0004] The manufacturing process of ceramic silicone rubber fire-resistant cables is also complicated, and the refractory silicone rubber layer is prone to stress cracking, and the water and fire resistance cannot meet the requirements of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/04C08K13/06C08K9/10C08K7/14C08K3/36C08K5/5425C08K3/34C08K3/22C08K3/38
CPCC08K2003/2206C08K2003/2224C08K2003/2227C08K2003/2296C08K2003/387C08K2201/011C08L83/04C08L2201/02C08L2201/08C08L2205/025C08K13/06C08K9/10C08K7/14C08K3/36C08K5/5425C08K3/34C08K3/22C08K3/38
Inventor 张熙张军曹建强
Owner SUZHOU JINQIANG NEW MATERIALS