US4319924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-temperature curing coating composition
Assignee: Coatings for Industry Inc
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Filing: 1980-04-28
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Granted: 1982-03-16
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Expires: 2000-04-28
Abstract
Abstract A coating composition which is capable of being used effectively in a wide variety of applications where heretofore known coating compositions could not be used, or where their use was accompanied by various disadvantages is disclosed. The curing temperature at which coatings (for example, corrosion resistant coatings) are formed from an aqueous coating composition containing dissolved phosphate, dissolved dichromate, dissolved aluminum, and solid particulate material is lowered by adding diethanolamine to the composition. The coating composition of the present invention can be used to effectively coat substrates which heretofore could not be coated or could not be coated satisfactorily as a result of the substrate being destroyed or degraded by the relatively high temperatures that were required to satisfactorily cure heretofore known coating compositions.
Inventors
- 👤 Glenn A. Collins, Jr.
- 👤 James M. Klotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:56
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C17/00; C03C17/22; C04B28/00; C04B28/34; C04B41/45; C04B41/50; C04B41/5076; C04B41/5092; C04B41/80; C04B41/81; C04B41/85; C09; C09D; C09D5/00; C09D5/08; C09D5/10; C09D5/103; C23; C23C; C23C22/00; C23C22/73; C23C22/74; C03C2217/00; C03C2217/20; C03C2217/29; C03C2218/00; C03C2218/10; C03C2218/11
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
114 words
In an acidic aqueous coating composition comprising, in coating-forming proportions, materials which are a source of: dissolved phosphate; dissolved dichromate; dissolved aluminum; and inorganic solid particulate material having a particle size of at least about one micron and capable of being bonded to a metallic surface by phosphate bonding; wherein said composition is capable of being heat-cured at elevated temperature within a predetermined time into a water insoluble coating in which particulate material of the coating is phosphate bonded to said surface; the improvement comprising including diethanolamine into said composition in an amount sufficient to reduce the temperature at which said composition can be cured within said predetermined time into said water insoluble coating.
Claim 2
Dependent Claim
114 words
In an acidic aqueous coating composition comprising, in coating-forming proportions, materials which are a source of: dissolved phosphate; dissolved dichromate; dissolved aluminum; and inorganic solid particulate material having a particle size of at least about one micron and capable of being bonded to a metallic surface by phosphate bonding; wherein said composition is capable of being heat-cured at elevated temperature within a predetermined time into a water insoluble coating in which particulate material of the coating is phosphate bonded to said surface; the improvement comprising including diethanolamine into said composition in an amount sufficient to reduce the temperature at which said composition can be cured within said predetermined time into said water insoluble coating.
Claim 3
Dependent Claim
116 words
An acidic aqueous coating composition consisting essentially of ingredients which are a source of the following materials, in amounts equivalent to: (A) at least about 1 M/l of dissolved phosphate; (B) at least about 0.1 M/l of dissolved dichromate; (C) at least about 0.5 M/l of dissolved aluminum; (D) at least about 20 g/l of inorganic solid particulate material having a particle size of at least about one micron and capable of being bonded to a metallic surface by phosphate bonding; and (E) at least about 0.02 M/l of diethanolamine; wherein said composition is capable of being cured into a water insoluble coating in which particulate material of the coating is phosphate bonded to said surface.
Claim 4
Dependent Claim
116 words
An acidic aqueous coating composition consisting essentially of ingredients which are a source of the following materials, in amounts equivalent to: (A) at least about 1 M/l of dissolved phosphate; (B) at least about 0.1 M/l of dissolved dichromate; (C) at least about 0.5 M/l of dissolved aluminum; (D) at least about 20 g/l of inorganic solid particulate material having a particle size of at least about one micron and capable of being bonded to a metallic surface by phosphate bonding; and (E) at least about 0.02 M/l of diethanolamine; wherein said composition is capable of being cured into a water insoluble coating in which particulate material of the coating is phosphate bonded to said surface.
Claim 5
Dependent Claim
60 words
A composition according to claim 2 consisting essentially of: (A) about 1 to about 6 M/l of dissolved phosphate; (B) about 0.15 to about 3.5 M/l of dissolved dichromate; (C) about 1 to about 6 M/l of dissolved aluminum; (D) about 20 to about 2000 g/l of said particulate material; and (E) about 0.02 to about 0.3 M/l of diethanolamine.
Claim 6
Dependent Claim
15 words
A composition according to claim 1 including at least about 0.02 M/l of said diethanolamine.
Claim 7
Dependent Claim
56 words
A composition according to claim 1, 2, 3, or 4 wherein said particulate material is selected from the group consisting of one or more of the following: aluminum, copper, silver, nickel, cobalt/aluminum alloy, aluminum/manganese alloy, chromic oxide, silica, aluminum oxide, cerium oxide, zirconia, beryllia, silicon carbide, molybdenum disilicide, tungsten carbide, boron nitride, metal titanates and graphite.
Claim 8
Dependent Claim
17 words
A composition according to claim 1, 2, 3, or 4 wherein said particulate material is powdered quartz.
Claim 9
Dependent Claim
33 words
A composition according to claim 1, 2, 3, or 4 wherein the source of said dissolved phosphate is orthophosphoric acid and the source of said dissolved dichromate is chromic anhydride (CrO 3 ).
Claim 10
Dependent Claim
29 words
A composition according to claim 5 wherein the source of said dissolved phosphate is orthophosphoric acid and the source of said dissolved dichromate is chromic anhydride (CrO 3 ).
Claim 11
Dependent Claim
29 words
A composition according to claim 6 wherein the source of said dissolved phosphate is orthophosphoric acid and the source of said dissolved dichromate is chromic anhydride (CrO 3 ).
Claim 12
Dependent Claim
19 words
A composition according to claim 1, 2, 3, or 4 wherein said particulate material is aluminum or aluminum oxide.
Claim 13
Dependent Claim
128 words
An acidic aqueous coating composition which is capable of being heat-cured at a temperature within the range of about 180° F. to about 225° F. within one to about six hours into a water insoluble coating having excellent adhesion to steel and excellent corrosion resistant properties, including sacrificial corrosion protection properties, and which consists essentially of: (A) phosphoric acid in an amount equivalent to at least about 1 M/l of dissolved phosphate; (B) chromic anhydride in an amount equivalent to at least about 0.1 M/l of dissolved dichromate; (C) at least about 20 g/l of aluminum metal powder, the particle size of which is -400 mesh (U.S. Standard Sieve Series); (D) at least about 0.5 M/l of dissolved aluminum; and (E) at least about 0.02 M/l of diethanolamine.
Claim 14
Dependent Claim
128 words
An acidic aqueous coating composition which is capable of being heat-cured at a temperature within the range of about 180° F. to about 225° F. within one to about six hours into a water insoluble coating having excellent adhesion to steel and excellent corrosion resistant properties, including sacrificial corrosion protection properties, and which consists essentially of: (A) phosphoric acid in an amount equivalent to at least about 1 M/l of dissolved phosphate; (B) chromic anhydride in an amount equivalent to at least about 0.1 M/l of dissolved dichromate; (C) at least about 20 g/l of aluminum metal powder, the particle size of which is -400 mesh (U.S. Standard Sieve Series); (D) at least about 0.5 M/l of dissolved aluminum; and (E) at least about 0.02 M/l of diethanolamine.
Claim 15
Dependent Claim
67 words
A composition according to claim 11 wherein the ingredients are present in amounts equivalent to: (A) about 1 to about 6 M/l of dissolved phosphate; (B) about 0.15 to about 3.5 M/l of dissolved dichromate; (C) about 20 to about 2000 g/l of aluminum metal powder; (D) about 1 to about 6 M/l of dissolved aluminum; and (E) about 0.02 to about 0.3 M/l of said amine.
Claim 16
Dependent Claim
31 words
A composition according to claim 1, 2, 3, 4, 11 or 12 including also one or more of the following metals in dissolved form: magnesium, zinc, calcium, lithium, sodium, and potassium.
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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) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |