Fire-resistant silica gel material and preparation method thereof

A silica gel and fire-resistant technology, which is applied in the field of fire-resistant silica gel materials and its preparation, can solve the problems of poor fire resistance and easy fracture of flame-retardant silica gel, and achieve good flame-retardant and fire-resistant effects

Active Publication Date: 2021-08-24
福建纳新硅业科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to make up for the deficiencies of the existing technology and solve the problem that flame-retardant silica gel does not burn, but its own fire resistance is poor, and it is prone to breakage at high temperatures, the present invention proposes a fire-resistant silica gel material and its preparation method

Method used

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  • Fire-resistant silica gel material and preparation method thereof
  • Fire-resistant silica gel material and preparation method thereof

Examples

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preparation example Construction

[0041] The preparation method of the functional layer comprises the following steps:

[0042] S1: Put gelatin and 1 / 2 deionized water into the heating dish, control the temperature of the heating dish to rise to 55-60°C, stir at constant temperature for 5-6 minutes, remove the heat source, cool naturally to 35-38°C, and add sodium bicarbonate Pour the powder into the gelatin solution and keep stirring until the temperature of the solution drops to 25-28°C;

[0043] S2: Pass the fiber filaments into the cold storage and cool down for 5-10 minutes in an environment of 0-3°C. After the cooling is completed, under the traction of the tractor, traverse the gelatin solution at a uniform speed, and spray hydrogen oxide on the surface after crossing the gelatin solution. Calcium powder, the gelatin layer is obtained after natural cooling;

[0044] S3: Put the agar and 1 / 2 deionized water into the heating dish, control the temperature of the heating dish to rise to 100-102°C, stir at ...

Embodiment approach

[0051] As an embodiment of the present invention, the calcium hydroxide granules are granules made by mixing calcium hydroxide, agarose and foaming agent according to the ratio of 13:25:1;

[0052] When working, calcium hydroxide particles are made by mixing calcium hydroxide, agarose and foaming agent. When the temperature rises, the agarose dissolves, and the calcium hydroxide is converted into calcium carbonate by the action of carbon dioxide. At the same time, the foaming agent makes the agar The volume of the sugar solution expands, and with the internal carbon dioxide gas, under the action of air pressure, the formed fluid-like mixture is sprayed outward along the broken pores on the surface and blocked at the pores on the surface. On the one hand, it can effectively extinguish the surface flame. The hindering effect makes the injected carbon dioxide gas form dense bubbles, enhances the fire extinguishing effect of carbon dioxide, and reduces the damage of refractory sili...

Embodiment 1

[0063] The refractory silica gel material includes a surface layer and a base layer;

[0064] The surface layer is made of flame-retardant silicone material;

[0065] The base layer is made of glass fiber material;

[0066] Mix the silica gel and the flame retardant according to the ratio of 98:2 and pour it on the surface of the base layer. After natural cooling to room temperature, the refractory silica gel material is obtained. After cutting the refractory silica gel material, five silica gel strips of the same size are obtained. , No. A 1~A 5, wrap five silicone tapes on the surface of five identical cables, and use a 3Kg pressure plate to press the top, use a flamethrower to heat the surface of the cable wrapped with silicone tape, and control the heating The temperature rises slowly at 3°C / S, heat A1 to A5 to 1, 2, 3, 4, and 5 minutes respectively, then stop heating, and after cooling to room temperature, observe the damage degree of the silicone tape and the damage of ...

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a fire-resistant silica gel material and a preparation method thereof. Sodium bicarbonate and gelatin are combined, aluminum sulfate is dissolved in an outer agar layer, and a multi-layer structural body is prepared; further, when the exterior of the functional silk yarn formed by coating is heated, the functional fiber inner layer is dissolved first along with the transfer of the temperature; then, gelatin is mixed with sodium bicarbonate and calcium hydroxide, and agar is slowly dissolved along with continuous rising of the temperature; in the slow dissolution process of the agar, an aluminum sulfate solution and a sodium bicarbonate solution in an agar layer are subjected to a double hydrolysis reaction, and a large amount of carbon dioxide is released; the carbon dioxide enables internal calcium hydroxide to be condensed into calcium carbonate, the calcium carbonate is adsorbed on the surfaces of the fibers, then the hardness of the fibers is enhanced, a framework supporting effect is achieved; meanwhile, impact of the carbon dioxide has a hindering effect on combustion of flames, and therefore, the prepared silica gel material has good flame retardance and fire resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a refractory silica gel material and a preparation method thereof. Background technique [0002] In the prior art, silica gel is used as a high-quality material for cable outer sheath, insulating tape, and wrapping tape. Its high-quality insulation makes it have better electrical barrier properties, but due to the poor flame retardancy and fire resistance of silica gel itself , when in use, the silica gel material is often modified by adding a flame retardant, but due to the soft texture of the silica gel itself, although the silica gel itself is flame retardant at high temperature, the protection performance of the inner layer itself is poor. The prior art By adding zirconia material to the silica gel, the silica gel layer obtained has the property of transforming into ceramic form at high temperature, but due to the small amount of zirconia itself added and the high s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/02B32B17/06B32B25/10B32B25/20B32B37/10B32B37/12C08L83/04C08L5/12C08L89/00C08K13/04C08K7/10C08K3/26
CPCB32B25/042B32B25/10B32B25/20B32B5/02B32B37/10B32B37/1284C08L83/04B32B2262/101B32B2307/3065C08L2201/02C08L2205/03C08K2003/3081C08K2003/2206C08L5/12C08L89/00C08K13/04C08K7/10C08K3/26C08K3/30C08K3/22
Inventor 李冬冬胡文旭
Owner 福建纳新硅业科技有限公司
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