A kind of refractory silica gel material and preparation method thereof

A silica gel and refractory technology, which is applied in the field of refractory silica gel materials and their preparation, can solve the problems of poor fire resistance and easy fracture of flame retardant silica gel, and achieve the effect of good flame retardant and fire resistance.

Active Publication Date: 2022-07-01
福建纳福硅业有限公司
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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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  • A kind of refractory silica gel material and preparation method thereof
  • A kind of refractory silica gel material and preparation method thereof
  • A kind of refractory silica gel material and preparation method thereof

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preparation example Construction

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

[0042] S1: Pass the gelatin and 1 / 2 deionized water into the heating dish, control the temperature of the heating dish to rise to 55-60 °C, remove the heat source after stirring at a constant temperature for 5-6 min, and cool it naturally to 35-38 °C and then add sodium bicarbonate The powder is poured into the gelatin solution, and the stirring is continued until the temperature of the solution drops to 25-28°C;

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

[0044] S3: Pass the agar and 1 / 2 deionized water into the heating dish, control the temperature of the heating dish to rise to 100...

Embodiment approach

[0051] As an embodiment of the present invention, the calcium hydroxide particles are particles prepared by mixing calcium hydroxide, agarose and a foaming agent in a ratio of 13:25:1;

[0052] When working, calcium hydroxide particles are made by mixing calcium hydroxide, agarose and a 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 sugar solution expands in volume and cooperates with the carbon dioxide gas inside. Under the action of air pressure, the formed fluid mixture is sprayed out along the broken pores on the surface and blocked at the pores of the surface. On the one hand, it can effectively play a role in the surface flame. The blocking effect makes the injected carbon dioxide gas form dense bubbles, enhances the fire extinguishing effect of carbon dioxide, and reduces the damage of the refractory sil...

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] The silica gel and the flame retardant are mixed in a ratio of 98:2 and then poured on the surface of the base layer. After being naturally cooled to room temperature, the refractory silica gel material is obtained. , numbered A 1 to A 5, wrap the five silicone tapes on the surface of the five identical cables, and use a 3Kg pressure plate to press the top, and use a flame jet to heat the surface of the cable wrapped with the silicone tape to control the heating. The temperature was slowly raised at 3°C / S, and A1 to A5 were heated for 1, 2, 3, 4, and 5 minutes, respectively, and then stopped heating. After cooling to room temperature, observe the damage of the silicone tape and the damage of the inner cable. degree;

[0067] Table 1

[0068]

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Abstract

The invention belongs to the technical field of polymer materials, in particular to a refractory silica gel material and a preparation method thereof. The invention combines sodium bicarbonate and gelatin, and dissolves aluminum sulfate in the agar layer of the outer layer to prepare The multi-layer structure, and then make the outer part of the coated functional thread meet the temperature rise, with the transfer of temperature, the inner layer of the functional fiber is first dissolved, so that the gelatin is mixed with sodium bicarbonate and calcium hydroxide, and with The continuous rise of the temperature makes the agar dissolve slowly. During the process of the agar slowly dissolving, the aluminum sulfate solution and the sodium bicarbonate solution in the agar layer undergo a double hydrolysis reaction, releasing a large amount of carbon dioxide, and the carbon dioxide causes the calcium hydroxide inside to condense as Calcium carbonate is adsorbed on the surface of the fiber filaments, thereby enhancing the hardness of the fiber filaments and playing the role of skeleton support. At the same time, the impact of carbon dioxide has a hindering effect on the combustion of the flame, so that the obtained silica gel material has better flame retardant and fire resistance. sex.

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 the cable outer sheath, insulating tape, and winding tape. It has high-quality insulation and has good electrical barrier properties. However, due to the poor flame retardancy and fire resistance of silica gel itself. , In use, the silicone 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, its own protection performance for the inner layer is poor. By adding zirconia material to the silica gel, the obtained silica gel layer has the property of transforming into a ceramic form at high temperature. However, due to the small amount of zirconia itself added and the high sintering tem...

Claims

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Application Information

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Patent Type & Authority Patents(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 福建纳福硅业有限公司
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