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Waterproof ceramicized silicon rubber material and preparation method and application thereof

A technology of ceramicizing silicone rubber and silicone rubber, which is applied in the direction of connecting/terminating cables, etc., can solve the problems of high price, cable gland sealing, waterproof and dustproof problems, complicated preparation process, etc., to improve waterproof performance. , Good hole filling effect, large specific surface area

Inactive Publication Date: 2018-12-07
BEISIT ELECTRIC TECH HANGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still some problems with the use of vitrified silicone rubber materials as cable glands
1. The temperature of the ceramization reaction is too high, generally above 650°C, and the silicone rubber matrix will degrade above 200°C. If the ambient temperature is between 200-650°C, the silicone rubber matrix has already degraded and formed Porcelain reaction has not yet occurred, it is likely to cause cracking of the cable fixing head, decrease in mechanical properties, and problems in sealing, waterproof, dustproof and other performances, which will affect the safe and reliable operation of the machine
2. The ceramic body transformed from vitrified silicone rubber after vitrification is hard and self-supporting, but it is porous, not dense, and has poor waterproof performance. Directly pass through the cable fixing head and seep into the cable outlet hole, affecting the safe and reliable operation of the machine
However, the ceramic body transformed from this material has a large number of porous structures, is not dense, and has poor waterproof performance; moreover, although the degradation temperature of the main body of the silicone rubber matrix is ​​about 350 ° C, which is relatively close to the temperature at which the ceramization reaction occurs, when the environment When the temperature is 300-400°C, cracks and mechanical properties will still be reduced, resulting in problems with the sealing, waterproof, and dustproof performance of the cable gland; in addition, the preparation process of the ceramic modifier used is complex and expensive. high cost

Method used

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  • Waterproof ceramicized silicon rubber material and preparation method and application thereof
  • Waterproof ceramicized silicon rubber material and preparation method and application thereof
  • Waterproof ceramicized silicon rubber material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Waterproof ceramic silicone rubber, prepared by the following method:

[0047] Step 1: Grind 40g of silicon powder with an average particle size of 1μm for 1 hour, then mix with 20g of mica with an average particle size of 300μm, 20g of silicon dioxide, 8g of acicular wollastonite, and 3.2g of aluminosilicate fiber, and continue grinding 1.5h, and then dried at 100°C for 6h to obtain the pretreated porcelain-forming filler.

[0048] Step 2: Mix 60g of silicone rubber (silicone raw rubber), 2g of silicone oil, 15g of boron oxide, 0.1g of silane coupling agent, and 6g of aluminum dihydrogen phosphate, and heat up to 70°C for 1.5h; the mass ratio of silicone rubber is 15:40:15 methyl silicone rubber, vinyl-terminated methyl vinyl silicone rubber, methyl-terminated methyl vinyl phenyl silicone rubber, among which, methyl-terminated methyl vinyl phenyl silicone rubber The molar ratio of phenyl groups to silicon atoms is 0.25-0.35; the mass ratio of vinyl-terminated methyl v...

Embodiment 2

[0053] Waterproof ceramic silicone rubber, prepared by the following method:

[0054] Step 1: Grind 40g of silicon powder with an average particle size of 20nm for 0.5h, then mix with 100g of mica with an average particle size of 3μm, 80g of silicon dioxide, 14g of acicular wollastonite, and 8.4g of aluminosilicate fiber, and continue Grind for 2.5 hours, and then dry at 160°C for 2 hours to obtain the pretreated porcelain-forming filler.

[0055] Step 2: Mix 60g of silicone rubber (i.e. silicone raw rubber), 30g of silicone oil, 80g of boron oxide, 15g of silane coupling agent, and 9g of aluminum dihydrogen phosphate, and heat up to 100°C for 1 hour; the mass ratio of silicone rubber is 15: 75:50 of methyl silicone rubber, vinyl-terminated methyl vinyl silicone rubber, methyl-terminated methyl vinyl phenyl silicone rubber, wherein, methyl-terminated methyl vinyl phenyl silicone rubber contains benzene The molar ratio of the group to the silicon atom is 0.25-0.35; the vinyl-t...

Embodiment 3

[0060] Waterproof ceramic silicone rubber, prepared by the following method:

[0061] Step 1: Grind 40g of silicon powder with an average particle size of 30nm for 0.65h, then mix with 60g of mica with an average particle size of 30μm, 50g of silicon dioxide, 14g of acicular wollastonite, and 5.6g of aluminosilicate fiber, and continue Grind for 1.75 hours, and then dry at 125°C for 3 hours to obtain a pretreated porcelain-forming filler.

[0062] Step 2: Mix 60g of silicone rubber (silicon raw rubber), 16g of silicone oil, 47.5g of boron oxide, 7.55g of silane coupling agent, and 7.5g of aluminum dihydrogen phosphate, and heat up to 80°C for 1.15h; The ratio of 15:57.5:32.5 is composed of methyl silicone rubber, vinyl-terminated methyl vinyl silicone rubber, and methyl-terminated methyl vinyl phenyl silicone rubber. Among them, methyl-terminated methyl vinyl phenyl The molar ratio of phenyl to silicon atoms in silicone rubber is 0.25-0.35; vinyl-terminated methyl vinyl silic...

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Abstract

The invention discloses a waterproof ceramicized silicon rubber material comprising a ceramic-forming filler, silicone rubber, silicone oil, boron oxide, a coupling agent and a vulcanizing agent; andthe ceramic-forming filler comprises silicon powder, mica and silicon dioxide. A preparation method comprises the following steps: (1) grinding the silicon powder, mixedly grinding the silicon powderand other ceramic-forming filler components, and drying to obtain the pretreated ceramic-forming filler; (2) blending all components excluding the ceramic-forming filler and the vulcanizing agent, mixing and performing mixing under vacuum to obtain organosilicone rubber compound; (3) mixing the pretreated ceramic-forming filler with the organosilicone rubber compound; and (4) adding the vulcanizing agent for mixing. The waterproof ceramicized silicone rubber has good mechanical properties at normal temperature, and has a low ceramic-forming temperature to avoid cracking at ambient temperatureof 300 to 400 DEG C, so that a ceramic body transformed after ceramic-forming has a dense structure and good waterproof performance. The waterproof ceramicized silicon rubber material can be used in acable gland with a refractory layer made of the waterproof ceramicized silicon rubber material, and the cable gland is mechanically stable and still has water resistant at high temperature.

Description

technical field [0001] The invention relates to the field of ceramic polymers, in particular to a waterproof ceramic silicone rubber material, a preparation method and an application thereof. Background technique [0002] Cable glands, also known as cable waterproof joints and cable joints, are widely used in the fixing and protection of electrical wires and cables for mechanical equipment electrical, ship electrical, and anti-corrosion equipment. The machine can run safely and reliably. At present, the cable fixing head is mostly made of rubber material, but the rubber material is not resistant to high temperature and combustion, and there is a huge potential safety hazard in the event of a fire or other high temperature accidents, which limits their use. Therefore, the development of a cable gland material with flame-retardant function has become an urgent problem to be solved, and ceramic silicone rubber materials provide the possibility to achieve these goals. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/04C08K13/04C08K7/10C08K3/34C08K3/36C08K3/38H02G1/14
CPCC08K2201/003C08K2201/014C08L83/04C08L2201/02C08L2203/202C08L2205/025C08L2205/035H02G1/14C08K13/04C08K7/10C08K3/34C08K3/36C08K3/38
Inventor 曾凡乐李小强梁华陆健
Owner BEISIT ELECTRIC TECH HANGZHOU CO LTD
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