US4436772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anticorrosive coating process
Assignee: Dai Nippon Toryo Co Ltd
•
Filing: 1983-01-24
•
Granted: 1984-03-13
•
Expires: 2003-01-24
Abstract
Abstract An anticorrosive coating process comprises: (i) a step of applying on a substrate a zinc-rich paint or an epoxy resin primer coating, followed by air-drying, (ii) a step of applying thereon an intermediate synthetic resin coating, followed by air-drying, and (iii) a step of applying thereon a top coating comprising (a) a fluorine-containing copolymer composed of from 40 to 60 molar % of a fluoroolefin, from 5 to 45 molar % of cyclohexylvinyl ether, from 5 to 45 molar % of an alkylvinyl ether, from 3 to 15 molar % of a hydroxyalkylvinyl ether and from 0 to 30 molar % of other comonomer and (b) a polyisocyanate, followed by air-drying.
Inventors
- 👤 Masaaki Yamabe
- 👤 Hiromichi Higaki
- 👤 Toshio Shinohara
- 👤 Hiroyuki Tanabe
- 👤 Shunsuke Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:13
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/24; B05D7/26; B05D7/50; B05D7/56; B05D7/58; B05D7/584; B05D2202/00; B05D5/00; B05D5/08; B05D5/083
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
An anticorrosive coating process which comprises: (i) a step of applying on a substrate a zinc-rich paint or an epoxy resin primer coating, followed by air-drying, (ii) a step of applying thereon an intermediate synthetic resin coating, followed by air-drying, and (iii) a step of applying thereon a top coating comprising (a) a fluorine-containing copolymer composed of from 40 to 60 molar % of a fluoroolefin, from 5 to 45 molar % of cyclohexylvinyl ether, from 5 to 45 molar % of an alkylvinyl ether, from 3 to 15 molar % of a hydroxyalkylvinyl ether and from 0 to 30 molar % of other comonomer and (b) a polyisocyanate, followed by air-drying.
Claim 2
Dependent Claim
112 words
An anticorrosive coating process which comprises: (i) a step of applying on a substrate a zinc-rich paint or an epoxy resin primer coating, followed by air-drying, (ii) a step of applying thereon an intermediate synthetic resin coating, followed by air-drying, and (iii) a step of applying thereon a top coating comprising (a) a fluorine-containing copolymer composed of from 40 to 60 molar % of a fluoroolefin, from 5 to 45 molar % of cyclohexylvinyl ether, from 5 to 45 molar % of an alkylvinyl ether, from 3 to 15 molar % of a hydroxyalkylvinyl ether and from 0 to 30 molar % of other comonomer and (b) a polyisocyanate, followed by air-drying.
Claim 3
Dependent Claim
65 words
The anticorrosive coating process according to claim 1 wherein the intermediate synthetic resin coating is at least one resin selected from the group consisting of an epoxy resin coating, a tar-modified epoxy resin coating, an epoxy-urethane resin coating, a vinyl resin coating, a tar-modified vinyl resin coating, a chlorinated rubber coating, a urethane resin coating, an unsaturated polyester resin coating and an acrylic resin coating.
Claim 4
Dependent Claim
29 words
The anticorrosive coating process according to claim 1 wherein the intermediate synthetic resin coating is composed of an unsaturated polyester or epoxy resin, glass flakes and a curing catalyst.
Claim 5
Dependent Claim
15 words
The anticorrosive coating process according to claim 1 wherein the fluoroolefin is chlorotrifluoroethylene and/or tetrafluoroethylene.
Claim 6
Dependent Claim
32 words
The anticorrosive coating process according to claim 1 wherein the alkylvinyl ether is an alkylvinyl ether containing a straight chain or branched chain alkyl group having from 2 to 8 carbon atoms.
Claim 7
Dependent Claim
15 words
The anticorrosive coating process according to claim 1 wherein the hydroxyalkylvinyl ether is hydroxybutylvinyl ether.
References Cited (Backward Citations)
US4345057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |