Patent US3852087A successfully refreshed from Google Patents.
US3852087A
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US
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Composite pigment for blocking tannin
Assignee: Individual
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Filing: 1974-01-28
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Granted: 1974-12-03
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Expires: 1994-01-28
Abstract
Abstract A new method of treatment of pigments and water-thinnable paints to enhance their ability to render tannins insoluble is described. By this means, greater protection is provided against the migration of water soluble tannins contained in most types of wood, (but notably cedar and redwood), through a paint film and discoloring the surface. The treating or doping agents may be any of the amphoteric compounds, but notably the hydroxides or hydrates of alumina, titania, zirconia, silica or zinc. These may be used as addition agents to water-thinnable paints, or to one or more of the pigments contained in those paints. Our preferred method of use is to incorporate the amphoteric hydrates into certain of the composite pigments described in our application Ser. No. 182,241, abandoned in view of continuation-in-part application Ser. No. 285,323, filed Aug. 31, 1972 now U.S. Pat. No. 3,817,998.
Inventors
- 👤 W Spangenberg
- 👤 J Nordyke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:08
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/06; C; C09; C09C; C09C3/00; C09C3/06; C09D; C09D5/00; C09D5/02; C09D5/024; C09D7/00; C09D7/40; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C08; C08K; C08K3/00; C08K3/10; C08K3/12
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
59 words
THE METHOD OF RENDERING A WATER-BASED PAINT CAPABLE OF INHIBITING THE MIGRATION OF TANNINS THROUGH PAINT COATINGS WHEN APPLIED TO THE SURFACE OF WOOD WHICH CONTAINS TANNINS, COMPRISING INCORPORATING INTO A PIGMENT-CONTAINING WATERBASE PAINT COMPOSITON AN AMOUNT OF AT LEAST ONE AMPHOTERIC MEAL HYDRATE EFFECTIVE TO INSOLUBILIZE AND THEREBY INHIBIT THE MIGRATION OF SAID TANNINS THROUGH SAID PAINT COATING.
Claim 2
Independent Claim
59 words
THE METHOD OF RENDERING A WATER-BASED PAINT CAPABLE OF INHIBITING THE MIGRATION OF TANNINS THROUGH PAINT COATINGS WHEN APPLIED TO THE SURFACE OF WOOD WHICH CONTAINS TANNINS, COMPRISING INCORPORATING INTO A PIGMENT-CONTAINING WATERBASE PAINT COMPOSITON AN AMOUNT OF AT LEAST ONE AMPHOTERIC MEAL HYDRATE EFFECTIVE TO INSOLUBILIZE AND THEREBY INHIBIT THE MIGRATION OF SAID TANNINS THROUGH SAID PAINT COATING.
Claim 3
Dependent Claim
27 words
The method of claim 1 in which said amphoteric metal hydrate is selected from the group consisting of a hydrate of alumina, titania, zinc, zirconia and silica.
Claim 4
Dependent Claim
19 words
The method of claim 1 in which said amphoteric metal hydrate is in the form of an amphoteric salt.
Claim 5
Dependent Claim
28 words
The method of claim 1 in which the amount of amphoteric metal hydrate is between about 5% and about 30% by weight of the total pigment weight present.
Claim 6
Dependent Claim
56 words
A pigment-containing water-based paint composition for application to the surface of wood which contains tannins, to inhibit the migration of tannins from the wood into paint coatings applied thereto, said composition including at least one amphoteric metal hydrate in an amount effective to insolubilize and thereby inhibit the migration of said tannins through said paint coating.
Claim 7
Dependent Claim
56 words
A pigment-containing water-based paint composition for application to the surface of wood which contains tannins, to inhibit the migration of tannins from the wood into paint coatings applied thereto, said composition including at least one amphoteric metal hydrate in an amount effective to insolubilize and thereby inhibit the migration of said tannins through said paint coating.
Claim 8
Dependent Claim
27 words
The composition of claim 5 in which said amphoteric metal hydrate is selected from the group consisting of a hydrate of alumina, titania, zinc, zirconia and silica.
Claim 9
Independent Claim
76 words
The method of rendering a pigment consisting essentially of a composite of wollastonite base and a compound selected from the group consisting of calcium phosphate and calcium borate, capable of combining with and insolubilizing wood-derived tannins when said pigment is applied to a wood surface as a component of a water-based paint, which comprises incorporating with said pigment at least one amphoteric metal hydrate in an amount effective to combine with and to insolubilize said tannins.
Claim 10
Independent Claim
76 words
The method of rendering a pigment consisting essentially of a composite of wollastonite base and a compound selected from the group consisting of calcium phosphate and calcium borate, capable of combining with and insolubilizing wood-derived tannins when said pigment is applied to a wood surface as a component of a water-based paint, which comprises incorporating with said pigment at least one amphoteric metal hydrate in an amount effective to combine with and to insolubilize said tannins.
Claim 11
Dependent Claim
61 words
A paint pigment consisting essentially of a composite of wollastonite base and a compound selected from the group consisting of calcium phosphate and calcium borate and having incorporated therein between about 5% and about 30% by weight of at least one amphoteric metal hydrate capable of combining with and insolubilizing a woOd-derived tannin when said pigment is contacted with said tannin.
Claim 12
Dependent Claim
61 words
A paint pigment consisting essentially of a composite of wollastonite base and a compound selected from the group consisting of calcium phosphate and calcium borate and having incorporated therein between about 5% and about 30% by weight of at least one amphoteric metal hydrate capable of combining with and insolubilizing a woOd-derived tannin when said pigment is contacted with said tannin.
Claim 13
Dependent Claim
27 words
The method of claim 7 in which said amphoteric metal hydrate is selected from the group consisting of a hydrate of alumina, titania, zinc, zirconia and silica.
Claim 14
Dependent Claim
19 words
The method of claim 7 in which said amphoteric metal hydrate is in the form of an amphoteric salt.
Claim 15
Dependent Claim
27 words
The composition of claim 8 in which said amphoteric metal hydrate is selected from the group consisting of a hydrate of alumina, titania, zinc, zirconia and silica.
Claim 16
Dependent Claim
19 words
The composition of claim 8 in which said amphoteric metal hydrate is in the form of an amphoteric salt.
Claim 17
Dependent Claim
28 words
The composition of claim 5 in which the amount of amphoteric metal hydrate is between about 5% and about 30% by weight of the total pigment weight present.
Claim 18
Dependent Claim
28 words
The method of claim 7 in which the amount of amphoteric metal hydrate is between about 5% and about 30% by weight of the total pigment weight present.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |