US3900620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic aluminum systems useful as wood-stain reducing agents
Assignee: Reheis Co Inc
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Filing: 1973-09-18
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Granted: 1975-08-19
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Expires: 1993-09-18
Abstract
Abstract Staining and discoloration of painted wood surfaces, as a result of bleeding into the top or finish coat of soluble coloring matter and tannins naturally present in the wood, is prevented by coating or impregnating the wood with a basic aluminum compound, particularly with a water soluble basic aluminum halide or derivative thereof. The basic aluminum compound may be applied in aqueous solution or non-pigmented emulsion for prefinishing building lumber, or applied in the form of a pigmented emulsion as a primer coat.
Inventors
- 👤 William S Gilman
- 👤 John L Jones
- 👤 Andrew M Rubino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:20
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
94 words
A METHOD OF PREVENTING STAINING AND DISCOLORATION OF WATER-BASE PAINT APPLIED TO A WOOD SURFACE DUE TO THE LEACHING OF WATER SOLUBLE TANNINS AND NATURAL COLORING CONSTITUENTS PRESENT IN THE WOOD, WHICH METHOD COMPRISES APPLYING TO THE SURFACE OF WOOD TO BE PAINTED AN AQUEOUS COMPOSITION COMPRISING A WATER SOLUBLE BASIC ALUMINUM COMPOUND OR COMPLEX OF SUCH COMPOUND, SAID BASIC ALUMINUM COMPOUND OR COMPLEX BEING APPLIED IN AN EFFECTIVE AMOUNT TO PREVENT STAINING OF A SUBSEQUENTLY APPLIED WATER-BASE PAINT BUT INSUFFICIENT TO SUBSTANTIALLY INTERFERE WITH ADHESION BETWEEN THE WATER-BASE PAINT AND THE TREATED SURFACE.
Claim 2
Independent Claim
94 words
A METHOD OF PREVENTING STAINING AND DISCOLORATION OF WATER-BASE PAINT APPLIED TO A WOOD SURFACE DUE TO THE LEACHING OF WATER SOLUBLE TANNINS AND NATURAL COLORING CONSTITUENTS PRESENT IN THE WOOD, WHICH METHOD COMPRISES APPLYING TO THE SURFACE OF WOOD TO BE PAINTED AN AQUEOUS COMPOSITION COMPRISING A WATER SOLUBLE BASIC ALUMINUM COMPOUND OR COMPLEX OF SUCH COMPOUND, SAID BASIC ALUMINUM COMPOUND OR COMPLEX BEING APPLIED IN AN EFFECTIVE AMOUNT TO PREVENT STAINING OF A SUBSEQUENTLY APPLIED WATER-BASE PAINT BUT INSUFFICIENT TO SUBSTANTIALLY INTERFERE WITH ADHESION BETWEEN THE WATER-BASE PAINT AND THE TREATED SURFACE.
Claim 3
Dependent Claim
17 words
The method as defined in claim 1 wherein said basic aluminum compound is a basic aluminum halide.
Claim 4
Dependent Claim
20 words
The method as defined in claim 1 wherein said aqueous composition is a water solution of a basic aluminum halide.
Claim 5
Dependent Claim
29 words
The method as defined in claim 3 wherein said basic aluminum halide is a basic aluminum chloride which contains 1.5 to 2.5 atoms of aluminum per atom of chlorine.
Claim 6
Dependent Claim
15 words
The method as defined in claim 1 wherein said aqueous composition is a latex emulsion.
Claim 7
Dependent Claim
16 words
The method as defined in claim 5 wherein said aqueous composition is an acrylic latex emulsion.
Claim 8
Dependent Claim
17 words
The method as defined in claim 5 wherein said aqueous composition is a vinyl acrylic latex emulsion.
Claim 9
Dependent Claim
17 words
The method as defined in claim 5 wherein said aqueous composition is a polyvinyl acetate latex emulsion.
Claim 10
Dependent Claim
21 words
The method as defined in claim 1 wherein such aqueous composition is a primer paint containing pigment and a latex emulsion.
Claim 11
Dependent Claim
23 words
A method according to claim 1 wherein said basic aluminum compound is a pseudo basic aluminum product formed by neutralizing AlCl3 with glycine.
Claim 12
Dependent Claim
50 words
A method according to claim 1 wherein said aqueous composition also includes a zirconium compound having the general formula: Zr O (OH)2 z Az wherein A is selected from the group consisting of halides, nitrate, phenolsulfonate, sulfamate, sulfate and mixtures thereof, and z may vary from about 0.9 to 2.
Claim 13
Dependent Claim
49 words
A method according to claim 1 wherein said basic aluminum compound or complex is a basic aluminum halide corresponding to the empirical formula: Aln (OH)x Ay.ZH2O wherein n, x and y are numbers such that x + y 3n, Z is greater than O, and need not be integers.
Claim 14
Dependent Claim
25 words
A method according to claim 1 wherein said basic aluminum compound or complex comprises not more than about 16 weight percent of said aqueous composition.
Claim 15
Dependent Claim
20 words
A method according to claim 1 wherein said aqueous composition is applied to said surface by brushing, dipping or spraying.
Claim 16
Dependent Claim
43 words
A method according to claim 1 wherein said aqueous composition comprises a latex emulsion, pigment, and a basic aluminum halide, said basic aluminum halide being present in an amount of about 1 to 10 percent by weight of latex solids in said emulsion.
Claim 17
Dependent Claim
31 words
A method according to claim 1 wherein said basic aluminum compound is a complex formed by reacting a basic aluminum halide with a hydroxy carboxylic acid or salt of such acid.
Claim 18
Dependent Claim
40 words
A method according to claim 1 wherein said basic aluminum compound is a complex formed by reacting a basic aluminum halide with a polyhydroxy compound, at least 2 carbons of which polyhydroxy compound are each linked to a hydroxyl group.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |