Thermal insulation material and method for producing same

A heat-insulating material and manufacturing method technology, applied to chemical instruments and methods, ceramic products, electronic equipment, etc., can solve problems such as difficulty in maintaining the heat-insulating structure, inability to maintain the shape, collapse of the heat-insulating material, etc. Crack, strength, and heat resistance improvement effects

Active Publication Date: 2022-01-14
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, if a conventional heat insulating material using a urethane adhesive is used in a high-temperature atmosphere of about 500°C, the urethane adhesive, which is an organic component, decomposes, deteriorates, and generates gas or cracks. and the hidden danger of not being able to maintain its shape
In addition, since the urethane adhesive is relatively soft, there is a problem that when compressed, the heat insulating material is crushed and it is difficult to maintain the heat insulating structure

Method used

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  • Thermal insulation material and method for producing same
  • Thermal insulation material and method for producing same
  • Thermal insulation material and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～15、17

[0068] Add carboxymethyl cellulose (CMC; manufactured by Sigma-Aldrich) as a thickener to colloidal silica (aqueous dispersion of silica particles; "LUDOX (registered trademark) LS" manufactured by Sigma-Aldrich) Carboxymethylcellulose sodium salt, molecular weight is 380,000) and stirring. Next, the pulverized silica airgel was added and stirred, and glass fibers were further added and stirred to prepare a coating material for a heat insulating layer. The pulverized product of silica aerogel is obtained by pulverizing silica aerogel ("P200" manufactured by Cabot Corporation) with hydrophobic parts on the surface and inside using a household mixer to make it spherical , with an average particle size of 100 μm. As for the glass fiber, five types (A to E) having different aspect ratios (length / diameter) were selected from "chopped strands" manufactured by NEC Glass Co., Ltd. and used.

Embodiment 16

[0070] In place of the pulverized silica airgel, a non-pulverized silica airgel ("P200" manufactured by Cabot Corporation) was used, and the coating material for the heat insulating layer was prepared in the same manner as in Example 2. . The paints for heat insulating layers of Examples 1 to 17 are included in the concept of the paint for heat insulating layers of the present invention.

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Abstract

This thermal insulation material (1) is provided with a thermal insulation layer (10) that comprises: a porous structure which has a skeleton where a plurality of particles are connected, while having pores inside and a hydrophobic site at least in the surface among the surface and the inside; reinforcing fibers; and nanoparticles of a metal oxide serving as a binder. The thermal insulation layer (10) has a mass loss rate of 10% or less as determined by thermogravimetric analysis wherein the thermal insulation layer is held at 500 DEG C for 30 minutes.

Description

technical field [0001] The present invention relates to a heat insulating material using a porous structure such as silica airgel and a method for producing the same. Background technique [0002] Silica airgel is a porous material having a pore structure with a size of about 10 to 50 nm by connecting silica fine particles to form a skeleton. The thermal conductivity of silica airgel is less than that of air. Therefore, the development of a heat insulating material with high heat insulating properties that effectively utilizes silica airgel is progressing. For example, Patent Document 1 describes an article comprising silica airgel bound by water-dispersible polyurethane and having a thermal conductivity of 0.025 W / m·K or less. As in this article, an adhesive such as urethane resin is used to fix the silica airgel. [0003] However, if a conventional heat insulating material using a urethane adhesive is used in a high-temperature atmosphere of about 500°C, the urethane ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00F16L59/02C04B111/34C04B111/40
CPCC04B28/005F16L59/029C04B2201/32C04B2111/40C04B2111/343C04B24/383C04B14/064C04B14/42C04B38/00B32B17/02F16L59/06B32B7/05B32B2255/02B32B2250/02B32B2439/00B32B5/26B32B2307/304B32B2255/20B32B2262/103B32B2419/00B32B7/08B32B2605/003B32B5/022B32B2307/718B32B2262/101B32B2571/00B32B2307/306B32B2457/04B32B2266/126B32B2250/40B32B2266/057B32B5/18B32B5/30B32B2264/1021
Inventor 熊谷信志片山直树林翔太田口祐太朗
Owner SUMITOMO RIKO CO LTD
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