US3914476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for imparting water repellency to inorganic surfaces
Assignee: Wacker Chemie AG
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Filing: 1973-05-22
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Granted: 1975-10-21
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Expires: 1993-05-22
Abstract
Abstract The invention relates to a method for rendering inorganic surfaces water repellent by treating the surfaces with aqueous soluble carbonates, or bicarbonates simultaneously with, or subsequent to coating the surfaces with an aqueous solution of alkali metal organosiliconates. The inorganic surfaces contain free lime. Surfaces to be treated include shaped building materials such as walls of concrete, clay bricks, natural stone, roofing tile, clay bricks, calcium silicate bricks, and asbestos cement. Wall coatings containing sand and hydraulic or nonhydraulic binding materials such as lime, cement and gypsum may also be treated.
Inventors
- 👤 Siegfried Nitzsche
- 👤 Ewald Pirson
- 👤 Michael Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:56
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/5007; C04B41/501; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/4935
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
AN IMPROVED METHOD FOR IMPARTING WATER REPELLENCY TO SURFACES COMPOSED OF INORGANIC SUBSTANCES AND CONTAINING FREE LIME BY IMPREGNATING THE SURFCES WITH AN AQUEOUS SOLUTION OF AN ALKALI METAL ORGANOSILICONATE, THE IMPROVEMENT WHICH COMPRISES APPLYING SIMULTANEOUSLY TO SAID SURFACES AN AQUEOUS SOLUTION OF AN ALKALI METAL ORGANOSILICONATE AND FROM ABOUT 10 TO 350 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE ALKALI METAL ORGANOSILICONATE IN THE SILICONATE SOLUTION OF AN AQUEOUS SOLUBLE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARNONATES AND BICARBONATES AND AMMONIUM CARBONATE AND BICRBONATE.
Claim 2
Dependent Claim
90 words
AN IMPROVED METHOD FOR IMPARTING WATER REPELLENCY TO SURFACES COMPOSED OF INORGANIC SUBSTANCES AND CONTAINING FREE LIME BY IMPREGNATING THE SURFCES WITH AN AQUEOUS SOLUTION OF AN ALKALI METAL ORGANOSILICONATE, THE IMPROVEMENT WHICH COMPRISES APPLYING SIMULTANEOUSLY TO SAID SURFACES AN AQUEOUS SOLUTION OF AN ALKALI METAL ORGANOSILICONATE AND FROM ABOUT 10 TO 350 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE ALKALI METAL ORGANOSILICONATE IN THE SILICONATE SOLUTION OF AN AQUEOUS SOLUBLE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARNONATES AND BICARBONATES AND AMMONIUM CARBONATE AND BICRBONATE.
Claim 3
Dependent Claim
35 words
The improved method of claim 1 wherein the amount of aqueous soluble salt is from about 50 to 350 percent by weight based on the weight of the alkali metal organosiliconate in the siliconate solution.
Claim 4
Dependent Claim
35 words
The improved method of claim 1 wherein the amount of aqueous soluble salt is from about 30 to 150 percent by weight based on the weight of the alkali metal organosiliconate in the siliconate solution.
Claim 5
Dependent Claim
14 words
The improved method of claim 1 wherein the aqueous soluble salt is ammonium carbonate.
Claim 6
Dependent Claim
14 words
The improved method of claim 1 wherein the water soluble salt is ammonium bicarbonate.
Claim 7
Dependent Claim
94 words
AN IMPROVED METHOD FOR IMPARTING WATER REPELLENCY TO SURFACE COMPOSED OF INORGANIC SUBSTANCES AND CONTAINING FREE LIME BY IMPREGNATING THE SURFACES WITH AN AQUEOUS SOLUTION OF AN ALKALI METAL ORGANOSILICONATE, THE IMPROVEMENT WHICH COMPRISES APPLYING FROM 10 TO 350 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE ALKALI METAL ORGANOSILICONATE IN THE SILICONATE SOLUTION OF AN AQUEOUS SOLUBLE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES AND BICARBONATES AND AMMONIUM CARBNONATE AND BICARBONATE TO A SURFACE TREATED WITH THE ALKALI METAL ORGANOSILICONATE PRIOR TO THE COMPLETE DRYING OF THE ORGANOSILICONATE SOLUTION
Claim 8
Dependent Claim
94 words
AN IMPROVED METHOD FOR IMPARTING WATER REPELLENCY TO SURFACE COMPOSED OF INORGANIC SUBSTANCES AND CONTAINING FREE LIME BY IMPREGNATING THE SURFACES WITH AN AQUEOUS SOLUTION OF AN ALKALI METAL ORGANOSILICONATE, THE IMPROVEMENT WHICH COMPRISES APPLYING FROM 10 TO 350 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE ALKALI METAL ORGANOSILICONATE IN THE SILICONATE SOLUTION OF AN AQUEOUS SOLUBLE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES AND BICARBONATES AND AMMONIUM CARBNONATE AND BICARBONATE TO A SURFACE TREATED WITH THE ALKALI METAL ORGANOSILICONATE PRIOR TO THE COMPLETE DRYING OF THE ORGANOSILICONATE SOLUTION
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |