US5418006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating of substrate surfaces
Assignee: Wacker Chemie AG
•
Filing: 1993-01-25
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Granted: 1995-05-23
•
Expires: 2013-01-25
Abstract
Abstract In the method for coating substrate surfaces which are not water-absorbent, the substrate surfaces are coated with an aqueous composition which comprises an aqueous solution, dispersion and/or emulsion of film-forming substances and water-repellent substances, in which the coating can be removed by treatment with water. The method is also suitable for coating porous, water-absorbent substrates if the substrates are treated with a water-repellent prior to coating with the aqueous composition.
Inventors
- 👤 Michael Roth
- 👤 Christa Blamlhuber
- 👤 Gunther von Au
- 👤 Loher Karl-Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:57
CPC Classifications
C; C07; C07C; C07C63/00; C07C63/68; C07C63/72; C09; C09D; C09D5/00; C09D5/008
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
A method for protecting and providing for ease of cleaning of a porous, water-absorbent substrate comprising the steps of (1) treating the substrate with an impregnating agent which renders the substrate water repellent, selected from the group of organosilicon compounds consisting of alkoxy containing organosilanes and partial hydrolysis products thereof, reaction products of organochlorosilanes with ethylene glycol or diethylene glycol and alkoxy containing organopolysiloxanes and alkoxy containing alkali metal hydrocarbon siliconates, and subsequently forming a coating by applying to the substrate surface an aqueous composition containing an aqueous solution, dispersion and/or emulsion of a film-forming substance and a water-repellent substance selected from the group consisting of hydrophobic inorganic substances, paraffins, fluorinated or non-fluorinated waxes, carboxylic acid salts, organic polymers and silicone waxes, in which the coating can be removed with water.
Claim 2
Independent Claim
131 words
A method for protecting and providing for ease of cleaning of a porous, water-absorbent substrate comprising the steps of (1) treating the substrate with an impregnating agent which renders the substrate water repellent, selected from the group of organosilicon compounds consisting of alkoxy containing organosilanes and partial hydrolysis products thereof, reaction products of organochlorosilanes with ethylene glycol or diethylene glycol and alkoxy containing organopolysiloxanes and alkoxy containing alkali metal hydrocarbon siliconates, and subsequently forming a coating by applying to the substrate surface an aqueous composition containing an aqueous solution, dispersion and/or emulsion of a film-forming substance and a water-repellent substance selected from the group consisting of hydrophobic inorganic substances, paraffins, fluorinated or non-fluorinated waxes, carboxylic acid salts, organic polymers and silicone waxes, in which the coating can be removed with water.
Claim 3
Dependent Claim
13 words
The method of claim 1, wherein the film-forming substance is an organic polymer.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein the film-forming substance is a polysaccharide.
Claim 5
Dependent Claim
12 words
The method of claim 1, wherein the film-forming substance is polyvinyl alcohol.
Claim 6
Dependent Claim
20 words
The method of claim 1, wherein the aqueous composition contains from 0.1 to 20% by weight of a film-forming substance.
Claim 7
Dependent Claim
15 words
The method of claim 1, wherein the water-repellent substance is a fluorinated carboxylic acid salt.
Claim 8
Dependent Claim
24 words
The method of claim 1, wherein the aqueous composition also contains compounds selected from the group consisting of surfactants, biocides, aroma substances and dyes.
Claim 9
Dependent Claim
19 words
The method of claim 1, wherein the aqueous composition contains 0.1 to 20% by weight of said water-repellent substance.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-22 | 1998-11-21 | 1999-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-22 | 2002-11-21 | 2003-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-22 | 2006-11-21 | 2007-05-23 | $7700.00 | Window Closed / Lapsed |