초록 ▼

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 minera

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 aklali 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.

대표청구항 ▼

1. A porous mineral fibre/particle product comprising mineral fibres and/or mineral particles and a binder, said binder comprising a mixture of amorphous silica and one or more bases and water, and optionally one or more additives, said porous mineral fibre/particle product having a bulk density in

1. A porous mineral fibre/particle product comprising mineral fibres and/or mineral particles and a binder, said binder comprising a mixture of amorphous silica and one or more bases and water, and optionally one or more additives, said porous mineral fibre/particle product having a bulk density in the range of from about 300 kg/m3 to about 700 kg/m3.2. The porous mineral product according to claim 1, wherein the binder comprises a mixture of amorphous silica, and at least one of(a) an alkali metal organosiliconate and (b) a base. 3. The porous mineral product according to claim 2, wherein the binder comprises an alkali metal organosiliconate.4. The porous mineral product according to claim 2, wherein the base is selected from the group consisting of alkali or alkaline earth metal hydroxides, alkali or alkaline earth metal silicates, aluminium silicates, iron(II) and iron(III) silicates and mixtures thereof, alkali or alkaline earth metal pyrosilicates, aluminium pyrosilicates, iron(II) and iron(III) pyrosilicates and mixtures thereof, alkali or alkaline earth metal carbonates, alkali or alkaline earth metal bicarbonates, alkali or alkaline earth metal phosphates, alkali or alkaline earth metal pyrophosphates, ammonia, organic amines, and cements, and combinations thereof.5. The porous mineral product according to claim 4, wherein the base is selected from the group consisting of alkali metal hydroxides, alkaline earth metal hydroxides and cements.6. A method for preparing a porous mineral fibre/particle product comprising mineral fibres and/or mineral particles and a binder, said porous mineral fibre/particle product having a bulk density in the range from about 300 kg/m3 to about 700 kg/m3, the method comprising the steps of:preparing a binder by mixing an aqueous slurry of the amorphous silica, one or more bases, and optionally additives, applying the binder to the mineral fibres and/or mineral particles, compacting the mixture of the binder and the mineral fibres and/or mineral particles, and curing and drying the binder to obtain the mineral fibre/particle product. 7. The method according to claim 6, wherein the binder comprises a mixture of amorphous silica and at least one of (a) an alkali metal organosiliconate and (b) a base, and optionally additives.8. The porous mineral product according to claim 1, wherein the mineral fibres and mineral particles are selected from the group consisting of volcanic rock fibres, wollastonite fibres, montmorillonite fibres, tobermorite fibres, biotite fibres, atapulgite fibres, calcined bauxite fibres, mineral wool, whiskers, sand, expanded clay, wollastonite, perlite, ceramic fibres, loose fill lightweight expanded clay aggregate, man-made vitreous fibres, glass fibres, and inorganic fillers.9. The porous mineral product according to claim 8, wherein the glass fibres are selected from the group consisting of micro glass fibres, mineral wool fibres, processed mineral fibres from mineral wool, silicon-containing fibres, metal fibres, oxide fibres, and carbon fibres.10. The porous mineral product according to claim 8, wherein the inorganic fillers are selected from the group consisting of ground quartz, silica gel particles, heavy spar, bentonite, diatomite, dolomite, feldspar, kaolin, spherical and hollow particles, carbon particles, talc, mica, vermiculite, kiselguhr, aluminium silicate, chalk, and fly ash.11. The porous mineral product according to claim 1, which further comprises organic fibres selected from the group consisting of aromatic polyamide fibres, aromatic polyester fibres, aromatic polyimide fibres, cellulose fibres, cotton fibres, flax fibres, rubber fibres, fibres of derivatives of rubber, and polyolefin fibres.12. The porous mineral product according to claim 11, wherein the polyolefin fibres are selected from the group consisting of polyethylene and polypropylene fibres, polyacetylene fibres, polyester fibres, acrylic fibres, modified acrylic fibres, acrylonitrile fibres, elastomeric fibres, protein fibres, alginate fibres, poly(ethylene terephthalate) fibres, polyvinyl alcohol fibres, aliphatic polyamide fibres, polyvinylchloride fibres, polyurethane fibres, vinyl polymeric fibres, and viscous fibres.13. The porous mineral product according to claim 5, wherein the alkali metal hydroxide is selected from the group consisting of sodium hydroxide, potassium hydroxide and calcium hydroxide.