US4916176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating compositions
Assignee: PPG Industries Ohio Inc
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Filing: 1988-05-06
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Granted: 1990-04-10
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Expires: 2008-05-06
Abstract
Abstract An aqueous coating composition comprising a film-forming material, a metallic pigment, phosphate inhibitor being either an orthophosphoric acid or an organic acid ester of phosphoric acid containing a group of formula (I): <IMAGE> a cationic salt of one or more of the following metals: sodium, potassium, magnesium, calcium, strontium, barium, vanadium, cobalt, nickel, copper, zinc or silver; and a water containing diluent.
Inventors
- 👤 Zafirios Vachlas
- 👤 Stephen J. Thorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:19
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/38
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
85 words
A coating composition comprising a film-forming material, a metallic pigment, a phosphate inhibitor being either an orthophosphoric acid or an organic ester of phosphoric acid containing a group of formula (I): ##STR16## a water containing diluent and a salt which is soluble in said water containing diluent, and which is a salt of a metal selected from the group consisting of sodium, potassium, magnesium, calcium, strontium, barium, vanadium, cobalt, nickel, copper, zinc and silver, there being sufficient water in the diluent to dissolve said salt.
Claim 2
Dependent Claim
85 words
A coating composition comprising a film-forming material, a metallic pigment, a phosphate inhibitor being either an orthophosphoric acid or an organic ester of phosphoric acid containing a group of formula (I): ##STR16## a water containing diluent and a salt which is soluble in said water containing diluent, and which is a salt of a metal selected from the group consisting of sodium, potassium, magnesium, calcium, strontium, barium, vanadium, cobalt, nickel, copper, zinc and silver, there being sufficient water in the diluent to dissolve said salt.
Claim 3
Dependent Claim
13 words
A composition according to claim 1 where the metal pigment is aluminium flake.
Claim 4
Dependent Claim
13 words
A composition according to claim 1 where the phosphate inhibitor is orthophosphoric acid.
Claim 5
Dependent Claim
14 words
A composition according to claim 1 and orthophosphate ester/diphenolol polymer of molecular weight 500-10,000.
Claim 6
Dependent Claim
16 words
A composition according to claim 1 where the metal salt is copper, zinc or cobalt salt.
Claim 7
Dependent Claim
14 words
A composition according to claim 1 where the salt is copper or zinc naphthenate.
Claim 8
Dependent Claim
27 words
A composition as set forth in claim 2 in which the metal in said salt is selected from the group consisting of copper, barium, zinc and cobalt.
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) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |