US4749412A
Expired / Lapsed
US
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Method and composition for the inhibition of corrosion
Assignee: Drew Chemical Corp
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Filing: 1987-03-26
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Granted: 1988-06-07
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Expires: 2007-03-26
Abstract
Abstract A method and composition for inhibiting corrosion is disclosed. The method involves forming a coating of from about 1-10 mils thick on a surface, with a composition comprising an over-based alkaline organic sulfonate salt, a drying oil, a copper or rare earth metal drier, a zinc metal drier, an organic solvent, and petrolatum, and curing the coating. Optionally, the composition may include polyisobutylene. The method and composition are particularly useful for metal surfaces in a seawater environment.
Inventors
- 👤 Stanley J. Ciuba
- 👤 Michael J. Bartelme, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:37
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
194 words
A corrosion-inhibiting composition which comprises: (a) about 5 to 80% by weight of a rust-inhibitive, grease-like concentrate comprising a thioxotropic inorganic/organic complex stably dispersed in an essentially inert liquid oily phase in an amount not to exceed 4 parts, per part of said complex, of said essentially inert liquid oily phase, said inorganic/organic complex comprising an over-based alkaline earth organic sulfonate salt, whereby the crystalline structure of the inorganic portion of said complex is platelet and film-forming in character; (b) about 1 to 25% by weight of at least one drying oil, said drying oil being miscible in a diluent oil selected from the group consisting of aliphatic hydrocarbon diluents, cycloaliphatic hydrocarbon diluents, aromatic hydrocarbon diluents, and mixtures thereof, boiling at temperatures above 150° C.; (c) about 0.03 to 0.6% by weight metal provided by a first metal drier selected from the group consisting of copper carboxylate compounds, rare earth carboxylate compounds, and mixtures thereof; (d) about 0.1 to 2.2% by weight metal provided by a second metal drier selected from the group consisting of zinc carboxylate compounds; (e) about 10 to 90% by weight organic solvent; and (f) about 2 to 15% petrolatum.
Claim 2
Dependent Claim
194 words
A corrosion-inhibiting composition which comprises: (a) about 5 to 80% by weight of a rust-inhibitive, grease-like concentrate comprising a thioxotropic inorganic/organic complex stably dispersed in an essentially inert liquid oily phase in an amount not to exceed 4 parts, per part of said complex, of said essentially inert liquid oily phase, said inorganic/organic complex comprising an over-based alkaline earth organic sulfonate salt, whereby the crystalline structure of the inorganic portion of said complex is platelet and film-forming in character; (b) about 1 to 25% by weight of at least one drying oil, said drying oil being miscible in a diluent oil selected from the group consisting of aliphatic hydrocarbon diluents, cycloaliphatic hydrocarbon diluents, aromatic hydrocarbon diluents, and mixtures thereof, boiling at temperatures above 150° C.; (c) about 0.03 to 0.6% by weight metal provided by a first metal drier selected from the group consisting of copper carboxylate compounds, rare earth carboxylate compounds, and mixtures thereof; (d) about 0.1 to 2.2% by weight metal provided by a second metal drier selected from the group consisting of zinc carboxylate compounds; (e) about 10 to 90% by weight organic solvent; and (f) about 2 to 15% petrolatum.
Claim 3
Dependent Claim
14 words
The composition of claim 1 which further comprises up to 5% by weight polyisobutylene.
Claim 4
Dependent Claim
46 words
The composition of claim 1 wherein the first metal drier comprises a copper carboxylate compound, and the composition further comprises a third metal drier comprising a rare earth carboxylate compound providing a rare earth metal concentration of about 0.06 to 0.3% by weight of the composition.
Claim 5
Dependent Claim
17 words
The composition of claim 3 wherein the third metal drier comprises a lanthanum or cerium carboxylate compound.
Claim 6
Dependent Claim
19 words
The corrosion-inhibiting composition of claim 1 wherein the first metal drier consists essentially of neutralized copper organic acid compounds.
Claim 7
Dependent Claim
19 words
The corrosion-inhibiting composition of claim 5 wherein the second metal drier consists essentially of neutralized zinc organic acid compounds.
Claim 8
Dependent Claim
13 words
The corrosion-inhibiting composition of claim 6 wherein the drying oil comprises tung oil.
Claim 9
Dependent Claim
20 words
The corrosion-inhibiting composition of claim 7 wherein the over-based alkaline earth organic sulfonate salt comprises an over-based calcium sulfonate compound.
Claim 10
Dependent Claim
52 words
A corrosion-inhibiting composition which consists essentially of about 20 to 40% over-based calcium sulfonate, about 10 to 20% tung oil, about 30 to 60% organic solvent, about 3 to 8% petrolatum, about 0.1 to 0.6% copper provided by copper carboxylate compounds, and about 0.2 to 1.1% zinc provided by zinc carboxylate compounds.
Claim 11
Dependent Claim
52 words
A corrosion-inhibiting composition which consists essentially of about 20 to 40% over-based calcium sulfonate, about 10 to 20% tung oil, about 30 to 60% organic solvent, about 3 to 8% petrolatum, about 0.1 to 0.6% copper provided by copper carboxylate compounds, and about 0.2 to 1.1% zinc provided by zinc carboxylate compounds.
Claim 12
Dependent Claim
57 words
A corrosion-inhibiting composition which consists essentially of about 20 to 40% over-based calcium sulfonate, about 10 to 20% tung oil, about 30 to 60% organic solvent, about 3 to 8% petrolatum, about 0.1 to 0.6% copper provided by copper carboxylate compounds, about 0.2 to 1.1% zinc provided by zinc carboxylate compounds, and up to about 5% polyisobutylene.
Claim 13
Dependent Claim
57 words
A corrosion-inhibiting composition which consists essentially of about 20 to 40% over-based calcium sulfonate, about 10 to 20% tung oil, about 30 to 60% organic solvent, about 3 to 8% petrolatum, about 0.1 to 0.6% copper provided by copper carboxylate compounds, about 0.2 to 1.1% zinc provided by zinc carboxylate compounds, and up to about 5% polyisobutylene.
Claim 14
Dependent Claim
65 words
A corrosion-inhibiting composition which consists essentially of about 20 to 40% over-based calcium sulfonate, about 10 to 20% tung oil, about 30 to 60% organic solvent, about 3 to 8% petrolatum, about 0.1 to 0.6% copper provided by copper carboxylate compounds, about 0.2 to 1.1% zinc provided by zinc carboxylate compounds, and about 0.06 to 0.3% rare earth metals provided by rare earth carboxylate compounds.
Claim 15
Dependent Claim
65 words
A corrosion-inhibiting composition which consists essentially of about 20 to 40% over-based calcium sulfonate, about 10 to 20% tung oil, about 30 to 60% organic solvent, about 3 to 8% petrolatum, about 0.1 to 0.6% copper provided by copper carboxylate compounds, about 0.2 to 1.1% zinc provided by zinc carboxylate compounds, and about 0.06 to 0.3% rare earth metals provided by rare earth carboxylate compounds.
Claim 16
Dependent Claim
70 words
A corrosion-inhibiting composition which consists essentially of about 20 to 40% over-based calcium sulfonate, about 10 to 20% tung oil, about 30 to 60% organic solvent, about 3 to 8% petrolatum, about 0.1 to 0.6% copper provided by copper carboxylate compounds, about 0.2 to 1.1% zinc provided by zinc carboxylate compounds, about 0.06 to 0.3% rare earth metals provided by rare earth carboxylate compounds, and up to about 5% polyisobutylene.
Claim 17
Dependent Claim
70 words
A corrosion-inhibiting composition which consists essentially of about 20 to 40% over-based calcium sulfonate, about 10 to 20% tung oil, about 30 to 60% organic solvent, about 3 to 8% petrolatum, about 0.1 to 0.6% copper provided by copper carboxylate compounds, about 0.2 to 1.1% zinc provided by zinc carboxylate compounds, about 0.06 to 0.3% rare earth metals provided by rare earth carboxylate compounds, and up to about 5% polyisobutylene.
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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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |