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Silicic acid mixtures and use thereof as insulation material

A technology for insulating materials and mixtures, which is applied in the field of silicic acid mixtures and their use as insulating materials, can solve the problems of reducing thermal insulation properties and mechanical stability, and achieve the effect of good thermal insulation properties.

Inactive Publication Date: 2016-05-04
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The added perlite has the disadvantage of reducing thermal insulating properties and mechanical stability

Method used

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  • Silicic acid mixtures and use thereof as insulation material
  • Silicic acid mixtures and use thereof as insulation material
  • Silicic acid mixtures and use thereof as insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Preparation of fumed silica by mixing equipment (Dispermat VL60) from Getzmann N20 (WackerChemie AG, Burghausen), rice hull ash (produced by burning the residue obtained during the milling of rice obtained from PatumRiceMillandGranary, AmphurMueng, Thailand) and cellulose fibers ( Textilwerke, Schenkenzell, chopped to 6 mm) powder mixture. With a total amount of 800g, the percentages are as follows:

[0068] 30% by weight N20

[0069] 65% rice hull ash by weight

[0070] 5% by weight of cellulose fibers

[0071] By first introducing the mixture into a non-woven bag (polypropylene, weight per unit area 27 g / m 2 , Kreykamp GmbH, Nettetal) and which were closed by means of heat welding clamps HZ (230V, 540W, Kopp, Reichenbach), the mixture obtained was processed to manufacture vacuum-insulated panels. Drying was then performed at 55° C. for 10 hours in a Kelvitron drying oven (Heraeus, Hanau). The filled and dried nonwoven bag was then introduced into a sealing f...

Embodiment 2

[0073] According to the detailed description in Example 1, the following mixture was used for the production of VIP:

[0074] 30% by weight N20

[0075] 60% silica fume by weight

[0076] 5% silicon carbide by weight

[0077] 5% by weight of cellulose fibers

[0078] The results of the thermal conductivity measurements at 10°C are again shown in Table 1.

Embodiment 3

[0080] According to the detailed description in Example 1, the following mixture was used for the production of VIP:

[0081] 25% by weight N20

[0082] 35% rice hull ash by weight

[0083] 35% silica fume by weight

[0084] 5% by weight of cellulose fibers

[0085] In Table 1 the results of the thermal conductivity measurement at 10°C are shown.

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Abstract

1. The invention relates to silicic acid mixtures and use thereof as insulation material. 2.1 The problem to be solved by the invention was the providing of a cost-effective mixture based on silicic acid which can be used for insulation, wherein said mixture contains as small a volume as possible of chemically produced silicic acid and a high proportion of silicon-containing by-products or waste products, without substantially reducing the insulating properties. 2.2 This problem is solved by a mixture of silicic acid and more than 50 wt.-% silicon-containing ash, which contains no perlite, wherein the silicon-containing ash preferably comprises rice husk ash and silica fume. The invention further relates to a method for producing insulation material by producing the mixture according to the invention and introducing the mixture into a sleeve, wherein no sintering step occurs in the method. Mixtures of differing compositions were correspondingly processed into a vacuum insulation panel and the insulating properties were compared based on the measured thermal conductivity. 2.2 The mixture according to the invention can be used as an insulation material, in particular for housing insulation.

Description

technical field [0001] The present invention provides a mixture of silica and more than 50% by weight of silicon-containing ash (silicon-containingash), not including any perlite; a method for preparing a mixture according to the invention and introducing the mixture into A method of manufacturing an insulating material by encapsulation (encapsulation, encapsulation, envelope), in which sintering does not occur. The invention further provides for the use of the thermal insulation material according to the invention, especially in the insulation of buildings. Background technique [0002] Thermal insulation (also known as heat insulation) is an important aspect for reducing energy consumption. Thermal insulation is intended to reduce the passage of heat through the enclosure to protect the area from cooling or heating. Thermal insulation is therefore used to minimize the heat demand of buildings to enable technical processes or reduce their energy consumption, and also for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/80F16L59/02C04B30/02
CPCC04B30/02C04B2111/10C04B2111/28E04B1/803F16L59/028F25D2201/14Y02B80/10Y02W30/91Y02A30/242C04B7/02C04B14/066C04B18/101C04B18/146C04B20/0048C04B2103/56C04B12/04C04B14/324C04B18/24C04B14/42C04B24/2623C04B14/46C04B22/16C04B14/28C04B24/10C04B30/00
Inventor 沃尔夫冈·尼斯汉斯·埃布尔梅尔
Owner WACKER CHEM GMBH
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