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Binder systems derived from amorphous silica and bases

a technology of amorphous silica and binding system, which is applied in the direction of ceramic shaping apparatus, solid waste management, climate sustainability, etc., can solve the problem that organic binding system may be inflammabl

Inactive Publication Date: 2005-01-27
AALBORG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to new mineral wool products that use a binder system based on amorphous silica and alkali metal organosiliconates. The binder system is derived from amorphous silica and one or more bases, and optionally additives. The binder system can be used in mineral fibre products to replace traditional organic binders, which are inflammable. The invention also provides a method for removing odorous substances from gases by using materials made from ultra-fine silica, water, and one or more components enabling porosity-conferring binding of the material. The technical effects of the invention include improved fire-proof binder systems for mineral fibre products, as well as new methods for preparing binder systems and removing odorous substances from gases.

Problems solved by technology

Organic binders may however be inflammable.

Method used

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  • Binder systems derived from amorphous silica and bases

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All values are in grams (g) unless otherwise specified. % is percent by weight unless otherwise stated.

Silica slurry was obtained from Elkem Materials, Norway (Elkem Microsilica® slurry). The concentration of the slurry was 50% silica by weight.

Potassium methyl siliconate as a 42% aqueous solution (Wacker BS-15) was obtained from Wacker Chemie GmbH, Germay.

Potassium hydroxide pellets were obtained from Bie & Bemtsen A / S, Denmark.

Sodium hydroxide pellets (Afløbsrens) were obtained from the grocery store.

Rockwool® Hulrumsfyid (mineral wool) and Glasuld® Hulrumsfyld (glass wool) from Ledreborg Tømmerhandel, Roskilde, Denmark.

Loose silica was obtained from Elkem Materials, Norway (Elkem Microsilica®).

Densified silica was obtained from Elkem Materials, Norway.

Sand-lime mortar was obtained from Dansk SystemMørtel A / S, Denmark.

Soda lye (27%) and soda water glass was obtained from Borup Kemi, Denmark.

Basic, rapid, ultra and white cements were obtained from Aalborg Portl...

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Abstract

The present invention relates to compositions comprising the reaction product of amorphous silica or ultra-fine silica and one or more bases. The present invention also relates to materials and method involving the use of such products. In particular, the present invention i.a. relates to new mineral wool products, e.g. products comprising man-made vitreous fibres (such as glass fibres, slag fibres, stone fibres and rock fibres) or perlite, having included therein a binder component which comprises amorphous silica and alkali metal organosiliconates, e.g. potassium methyl siliconate. An important feature of such products is the preparation of the binder systems under vigorous mixing. Such products provide good fire, heat and sound insulating properties. The present invention also provides to a method for removing odorous substances from a gas where materials prepared from ultra-fine silica, water, and one or more components enabling porosity-conferring binding of the material, e.g. a base or bases. Furthermore, the invention provides methods for thixotroping bitumen.

Description

FIELD OF THE INVENTION The present invention relates to compositions comprising the reaction product of amorphous silica or ultra-fine silica and one or more bases. The present invention also relates to materials and method involving the use of such products. In particular, the present invention i.a. relates to new mineral wool products, e.g. products comprising man-made vitreous fibres (such as glass, slag, stone and rock fibres), having included therein a binder component which comprises amorphous silica and alkali metal organosiliconates. The present invention also relates to the binder systems as such. Furthermore, the present invention relates to a method for removing odorous substances from a gas where materials prepared from ultra-fine silica, water, and one or more components enabling porosity-conferring binding of the material, e.g. a base or bases. BACKGROUND OF THE INVENTION In the field of mineral wool product there has been an increasing interest in replacing organi...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01D53/04C03C25/10C03C25/42C03C25/47C04B14/06C04B18/02C04B28/00C04B28/18C04B28/24D21H17/64D21H17/68D21H17/70D21H21/10
CPCB01D53/02B01D2253/10D21H21/10D21H17/70D21H17/68D21H17/64C04B2111/00793C04B2111/00767C04B28/24B01D2253/106B01D2253/306B01D2257/90C03C25/101C03C25/42C04B14/062C04B18/02C04B28/003C04B28/18C04B28/184C04B14/38C04B22/00C04B24/12C04B24/42C04B7/00C04B38/00C04B14/386C04B14/42C04B14/46C04B14/4668C04B16/0616C04B18/24C04B22/062C04B40/0028C04B40/0082C04B40/0218C04B2103/402C04B2103/406C04B14/18C04B7/02C04B18/0463C03C25/47Y02W30/91
Inventor HOLBEK, KJELD
Owner AALBORG UNIV
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