US4643769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibiting coating composition
Assignee: BP PLC
•
Filing: 1986-03-18
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Granted: 1987-02-17
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Expires: 2006-03-18
Abstract
Abstract A composition suitable for the preparation of a surface protective coating composition e.g. a paint by admixture with an organic film-forming binder comprises (i) elemental zinc in particulate form and (ii) inorganic oxide particles such as silica having corrosion inhibiting cations e.g. calcium chemically bound to the surface by ion exchange. The amount of elemental zinc to inorganic oxide is preferably from 75:1 to 3:1 by weight. The binder can be organic e.g. an epoxy resin, epoxy ester, chlorinated rubber or polystyrene or may be inorganic e.g. silicates.
Inventors
- 👤 David G. Othen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:55
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/10; C09D5/106
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
43 words
A composition suitable for the preparation of a surface protective coating composition by admixture with a binder, said composition comprising (i) elemental zinc in particulate form, (ii) inorganic oxide particles having corrosion inhibiting cations chemically bound to the surface thereof by ion exchange.
Claim 2
Dependent Claim
43 words
A composition suitable for the preparation of a surface protective coating composition by admixture with a binder, said composition comprising (i) elemental zinc in particulate form, (ii) inorganic oxide particles having corrosion inhibiting cations chemically bound to the surface thereof by ion exchange.
Claim 3
Dependent Claim
25 words
A composition as claimed in claim 1 wherein the amount of elemental zinc to ion exchanged inorganic oxide is from 75:1 to 3:1 by weight.
Claim 4
Dependent Claim
21 words
A composition as claimed in claim 1 wherein the inorganic oxide is silica and the corrosion inhibiting ions are calcium cations.
Claim 5
Dependent Claim
62 words
A coating composition suitable for application to a metal surface to inhibit corrosion which composition comprises: (i) a binder, (ii) from 50 to 90% by weight of elemental zinc in particulate form based on the weight of the coating composition, and (iii) an effective amount of inorganic oxide particles having corrosion inhibiting ions chemically bound to the surface thereof by ion exchange.
Claim 6
Dependent Claim
62 words
A coating composition suitable for application to a metal surface to inhibit corrosion which composition comprises: (i) a binder, (ii) from 50 to 90% by weight of elemental zinc in particulate form based on the weight of the coating composition, and (iii) an effective amount of inorganic oxide particles having corrosion inhibiting ions chemically bound to the surface thereof by ion exchange.
Claim 7
Dependent Claim
26 words
A coating composition as claimed in claim 4 wherein the ratio of elemental zinc to ion exchanged inorganic oxide is from 75:1 to 3:1 by weight.
Claim 8
Dependent Claim
22 words
A coating composition as claimed in claim 4 wherein the inorganic oxide is silica and the corrosion inhibiting ions are calcium cations.
Claim 9
Dependent Claim
38 words
A coating composition as claimed in claim 4 wherein the amount of corrosion inhibiting ions bound to the surface of the inorganic oxide is from 0.01 to 2.5 millimoles of corrosion inhibiting ion per gram of inorganic oxide.
Claim 10
Dependent Claim
41 words
A coating composition as claimed in claim 4, in the form of a two-part package, including a curable resin binder and a curing agent for the curable resin, the curable resin and curing agent being in different parts of the pack.
Claim 11
Dependent Claim
55 words
A paint suitable for the application to a metal surface to inhibit corrosion said paint comprising (i) a binder, (ii) from 50 to 90% by weight of elemental zinc in particulate form, and (iii) as corrosion inhibitor an effective amount of silica particles having calcium cations chemically bound to the surface thereof by ion exchange.
Claim 12
Dependent Claim
55 words
A paint suitable for the application to a metal surface to inhibit corrosion said paint comprising (i) a binder, (ii) from 50 to 90% by weight of elemental zinc in particulate form, and (iii) as corrosion inhibitor an effective amount of silica particles having calcium cations chemically bound to the surface thereof by ion exchange.
Claim 13
Dependent Claim
12 words
Ferrous metal structures coated with a composition as claimed in claim 4.
References Cited (Backward Citations)
US3849141A
Cited
GB2071070A
Cited
EP0046057A1
Cited
GB2091235A
Cited
GB2103218A
Cited
GB2118557A
Cited
EP0089810A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |