KR850001352A - Hydrophobic composite, preparation method thereof and composition containing same - Google Patents

Abstract

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Description

Hydrophobic composite, preparation method thereof and composition containing same

As this is a public information case, the full text was not included.

Claims (27)

A component selected from the group consisting of silicon, titanium, aluminum, zirconium, vanadium, chromium, iron or mixtures thereof, bonded to the core material by the adhesive first coating containing the film-forming polyurethane and the adhesive first coating. A hydrophobic composite comprising a core material selected from the group consisting of granular and granular materials having a second coating containing a hydrophobic colloidal oxide of. The hydrophobic composite of claim 1, wherein the first coating contains about 50% by weight asphalt in the coating. 3. The hydrophobic composite of claim 2, wherein the tacky first and second coatings each comprise about 0.025% to about 1.00% by weight of the hydrophobic composite. 4. The hydrophobic composite of claim 3, wherein the second coating consists of substantially hydrophobic fumed silica, up to about 100% by weight of the corundum. 5. The hydrophobic composite of claim 4, wherein the core material is a siliceous material. 6. The hydrophobic composite of claim 5, wherein the siliceous material is a material selected from the group consisting of sand, gravel and slag. An aggregate consisting essentially of the hydrophobic composite of claim 6. The hydrophobic composite of claim 1, wherein the core material is selected from the group consisting of sand, gravel, tailings, coal ash, natural rock, blast furnace slag, crushed charcoal, sawdust, mica, wood chips and nut shells. The hydrophobic composite of claim 1, wherein the particle size of the material ranges from 25 mm to 125 μ. The hydrophobic composite of claim 1, wherein said second coating comprises a powdered abrasive material. The hydrophobic composite according to claim 10, wherein the powdered abrasive material is made of powdery corundum. The hydrophobic composite of claim 10, wherein the particle size of the powdered abrasive material is less than 50 microns. a) producing a core material selected from the group consisting of particulate and granular material within a predetermined size range; b) containing about 10 to 20% by weight of film-forming polyurethane, 0 to about 10% by weight of asphalt and about 70 to 90% by weight of the mentioned film-forming polyurethane and volatile solvents in which the asphalt is soluble. Mixing with the coating composition to remove almost all solvent from the mixture of the core material and the coating composition to deposit the first sticky coating on the core material; c) a group consisting of silicon, titanium, aluminum, zirconium, vanadium, chromium, iron or mixtures thereof bonded to the core material by means of the first sticky coating on this core material having the first sticky coating mentioned on the surface Method of producing a hydrophobic composition comprising the step of applying a second coating consisting of a hydrophobic colloidal oxide of the element selected from to produce a hydrophobic composition. The method according to claim 13, wherein the coating composition containing no core material and volatile solvent is mixed in an amount of up to 0.5% by weight of the core material (when applying the first adhesive coating). 15. The method of claim 14, wherein the solvent component in the coating composition used in the application of the first adhesive coating is removed by evaporation heating. The method of claim 15, wherein the core material is sand and the second coating is hydrophobic fumed silica. 16. The method of claim 15, wherein the second coating is applied to the core material having the sticky first coating on the surface at elevated temperature and then the resulting hydrophobic composition is cooled to ambient temperature. The method of claim 13, wherein the core material is selected from the group consisting of sand, gravel, ore residue, coal ash, natural stone, smelting tailings, diatomaceous earth, charcoal mill, sawdust, mica, large rice and nutshells. The method of claim 13, wherein the core material has a particle size of 25 mm to 125 μ. The method of claim 13, wherein the core material is a siliceous substrate. 21. The method of claim 20, wherein the siliceous material is selected from sand, gravel and slag. The method of claim 13 wherein the second coating is a powdered abrasive material. 23. The method of claim 22, wherein the powdered abrasive material is a material consisting of powdery corundum. The method of claim 22, wherein the particle size of the powdered abrasive material is 50 μm or less. A water-repellent coating composition comprising the aggregate and binder of the hydrophobic composite of claim 3. The composition of claim 25, wherein the binder is a liquid binder selected from the group consisting of asphalt, coal tar, paint, varnish, racker, liquid plastic, or tacky material. The composition of claim 25, wherein the binder is contained in about 10% by weight or less of the composition. ※ Note: The disclosure is based on the initial application.