US4532161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the aqueous impregnation of green wood with oil soluble metal salts
Assignee: Mooney Chemical Inc
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Filing: 1984-04-19
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Granted: 1985-07-30
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Expires: 2004-04-19
Abstract
Abstract A process for impregnating green wood with oil-soluble metal salts is described. The method comprises (a) contacting the green wood with an aqueous system comprising (i) water, (ii) at least one oil-soluble metal salt of an organic carboxylic acid, and (iii) at least one surfactant for a period of time sufficient to enable the metal salt to penetrate into the wood, and (b) removing the wood from contact with the aqueous system. Good penetration of the metal salt into the green wood is realized by this method when conducted under vacuum, at atmospheric pressure or at elevated pressures. Preferably, the metal salt is a preservative such as a fungicide, and the aqueous system also contains other desirable components such as fire retardants, coloring agents and insecticides.
Inventors
- 👤 Albert V. Collins
- 👤 Richard W. Asmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:34
CPC Classifications
B; B27; B27K; B27K3/00; B27K3/34; B27K3/36; B27K3/02; B27K3/08; B27K3/16; B27K3/22; B27K3/32; B27K3/343; B27K3/38; B27K3/52; B27K5/00; B27K5/001; B27K5/02; B27K2240/00; B27K2240/30
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
83 words
A method of impregnating green wood with metal salts which comprises (a) contacting the green wood with an aqueous system comprising (i) at least 50% by weight of water, (ii) a fungicidally effective amount of at least one oil-soluble metal salt of an organic carboxylic acid and (iii) an effective amount of at least one surfactant for a period of time sufficient to enable the metal salt to penetrate into the wood, and (b) removing the wood from contact with the aqueous system.
Claim 2
Independent Claim
83 words
A method of impregnating green wood with metal salts which comprises (a) contacting the green wood with an aqueous system comprising (i) at least 50% by weight of water, (ii) a fungicidally effective amount of at least one oil-soluble metal salt of an organic carboxylic acid and (iii) an effective amount of at least one surfactant for a period of time sufficient to enable the metal salt to penetrate into the wood, and (b) removing the wood from contact with the aqueous system.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the metal content in the aqueous mixture is from about 0.2 to 10% by weight.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein the metal of the metal salt is zinc, copper, chromium, iron, antimony, lead or mercury or a mixture thereof.
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein the acid is at least one aliphatic or alicyclic monocarboxylic acid containing from about six to about 30 carbon atoms.
Claim 6
Dependent Claim
18 words
The method of claim 4 wherein the salt is a basic salt or a mixture of basic salts.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein the salt is at least one acid copper salt.
Claim 8
Dependent Claim
23 words
The method of claim 1 wherein the salt is a zinc salt or a mixture of a copper salt and a zinc salt.
Claim 9
Dependent Claim
27 words
The method of claim 1 wherein the green wood is immersed in an aqueous system maintained at the temperature of between about 5° C. and 95° C.
Claim 10
Dependent Claim
15 words
The method of claim 8 wherein the temperature of the aqueous system is ambient temperature.
Claim 11
Dependent Claim
17 words
The method of claim 1 wherein the aqueous system contains anionic or nonionic surfactants or mixtures thereof.
Claim 12
Dependent Claim
17 words
The method of claim 1 wherein the wood is immersed in the aqueous system at atmospheric pressure.
Claim 13
Dependent Claim
27 words
The method of claim 1 wherein the wood is immersed in the aqueous system and maintained in the system under fluid pressure in an enclosed pressure vessel.
Claim 14
Dependent Claim
44 words
The method of claim 12 wherein the pressure within the vessel is increased to and maintained at a level of about 150 to 275 pounds per square inch for a period of time sufficient to cause the aqueous system to penetrate into the wood.
Claim 15
Dependent Claim
25 words
The method of claim 13 wherein the pressure is maintained between 150-275 pounds per square inch for a period of about 15 to 60 minutes.
Claim 16
Dependent Claim
16 words
The method of claim 10 wherein the surfactant comprises a mixture of anionic and nonionic surfactants.
Claim 17
Dependent Claim
12 words
The method of claim 1 wherein the metal salt is a fungicide.
Claim 18
Dependent Claim
20 words
The method of claim 1 wherein the aqueous system contains (iv) less than 20% by weight of a hydrocarbon solvent.
Claim 19
Dependent Claim
15 words
The method of claim 1 wherein the aqueous system also contains (v) a flame retardant.
Claim 20
Dependent Claim
15 words
The method of claim 1 wherein the aqueous system also contains (vi) a coloring agent.
Claim 21
Dependent Claim
14 words
The method of claim 1 wherein the aqueous system also contains (vii) an insecticide.
Claim 22
Independent Claim
126 words
A method of impregnating green wood with metal salts which comprises (a) immersing the green wood in an aqueous system comprising (i) at least 50% by weight of water, (ii) at least one oil-soluble acid, neutral or basic metal salt of one or more organic carboxylic acids, wherein the metal salt is present in the aqueous mixture in an amount sufficient to provide a metal content of from about 0.2 to 10% by weight, (iii) from about 0.25 to about 7.5% by weight of at least one anionic or nonionic surfactant, and (iv) less than 20% by weight of a hydrocarbon solvent for a period of time sufficient to enable the metal salt to penetrate into the wood, (b) removing the wood from the aqueous system.
Claim 23
Independent Claim
126 words
A method of impregnating green wood with metal salts which comprises (a) immersing the green wood in an aqueous system comprising (i) at least 50% by weight of water, (ii) at least one oil-soluble acid, neutral or basic metal salt of one or more organic carboxylic acids, wherein the metal salt is present in the aqueous mixture in an amount sufficient to provide a metal content of from about 0.2 to 10% by weight, (iii) from about 0.25 to about 7.5% by weight of at least one anionic or nonionic surfactant, and (iv) less than 20% by weight of a hydrocarbon solvent for a period of time sufficient to enable the metal salt to penetrate into the wood, (b) removing the wood from the aqueous system.
Claim 24
Dependent Claim
18 words
The method of claim 21 wherein the green wood is immersed in the aqueous system at atmospheric pressure.
Claim 25
Dependent Claim
22 words
The method of claim 21 wherein the green wood is immersed in the aqueous system under fluid pressure in an enclosed vessel.
Claim 26
Dependent Claim
28 words
The method of claim 23 wherein the pressure within the vessel is increased to and maintained at a level of about 150 to 275 pounds per square inch.
Claim 27
Dependent Claim
28 words
The method of claim 24 wherein the pressure is maintained at about 150 to 275 pounds per square inch for a period of about 15 to 60 minutes.
Claim 28
Dependent Claim
12 words
The method of claim 21 wherein the aqueous system is a dispersion.
Claim 29
Dependent Claim
38 words
The method of claim 21 wherein the organic carboxylic acid is an aliphatic or alicyclic monocarboxylic acid having from about 6 to 30 carbon atoms, and the salt is a basic salt or a mixture of basic salts.
Claim 30
Dependent Claim
43 words
The method of claim 21 wherein the organic carboxylic acid is an aliphatic or alicyclic monocarboxylic acid having from about 6 to 30 carbon atoms, and the salt is a copper salt or a mixture of a copper salt and a zinc salt.
Claim 31
Dependent Claim
22 words
The method of claim 21 wherein the aqueous system is maintained within a temperature of between about 5° C. and 95° C.
Claim 32
Dependent Claim
34 words
The method of claim 21 wherein the metal salt is at least one metal salt of an aliphatic or alicyclic monocarboxylic acid wherein the metal is copper, zinc, chromium, iron, antimony, lead or mercury.
Claim 33
Dependent Claim
12 words
The method of claim 30 wherein the metal is copper or zinc.
Claim 34
Dependent Claim
14 words
The method of claim 21 wherein the aqueous system also contains (v) a flame-retardant.
Claim 35
Dependent Claim
15 words
The method of claim 21 wherein the aqueous system also contains (vi) a coloring agent.
Claim 36
Dependent Claim
14 words
The method of claim 21 wherein the aqueous system also contains (vii) an insecticide.
Claim 37
Dependent Claim
14 words
The method of claim 1 wherein the green wood are pieces of green wood.
Claim 38
Dependent Claim
15 words
The method of claim 1 wherein the aqueous system (a) is substantially free of ammonia.
Claim 39
Dependent Claim
14 words
The method of claim 21 wherein the aqueous system is substantially free of ammonia.
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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) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |