Patent US4680203A successfully refreshed from Google Patents.
US4680203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective coating on concrete construction
Assignee: DKS Co Ltd
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Filing: 1986-05-13
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Granted: 1987-07-14
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Expires: 2006-05-13
Abstract
Abstract A method of forming a protective coating on concrete or mortar construction which comprises coating said construction with a polyurethane coating composition comprising (A) a polyol component having an average hydroxyl number from 30 to 450 mg KOH/g, or a mixture of a polyol component and a polyamine component having the sum of average hydroxyl number and average amine number of from 30 to 450 mg KOH/g; and (B) an organic polyisocyanate curing agent, the proportion of said component (B) in terms of the NCO equivalent thereof relative to the active hydrogen equivalent of said component (A) being from 0.6 to 1.5.
Inventors
- 👤 Hirohisa Maki
- 👤 Katsuaki Matsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:58
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08G18/08; C08G18/10; C08G18/30; C08G18/36; C08G18/40; C08G18/48; C08G18/4891; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/6229; C08G18/65; C08G18/6505; C08G18/6523; C08G18/6529; C08G18/6576; C08G18/6582; C08G18/6594
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A method of forming a protective coating on concrete or mortar construction which comprises coating said construction with a polyurethane coating composition comprising; (A) a polyol component having an average hydroxyl number from 30 to 450 mg KOH/g, at least 5 equivalent % of which is a polyol having a backbone chain consisting solely of carbon atoms or a mixture of said polyol component and a polyamine component having the sum of average hydroxyl number and average amine number of from 30 to 450 mg KOH/g; and (B) an organic polyisocyanate curing agent, the porportion of said component (B) in terms of the NCO equivalent thereof relative to the active hydrogen equivalent of said component (A) being from 0.6 to 1.5.
Claim 2
Independent Claim
121 words
A method of forming a protective coating on concrete or mortar construction which comprises coating said construction with a polyurethane coating composition comprising; (A) a polyol component having an average hydroxyl number from 30 to 450 mg KOH/g, at least 5 equivalent % of which is a polyol having a backbone chain consisting solely of carbon atoms or a mixture of said polyol component and a polyamine component having the sum of average hydroxyl number and average amine number of from 30 to 450 mg KOH/g; and (B) an organic polyisocyanate curing agent, the porportion of said component (B) in terms of the NCO equivalent thereof relative to the active hydrogen equivalent of said component (A) being from 0.6 to 1.5.
Claim 3
Dependent Claim
12 words
The method according to claim 1, wherein said backbone chain is polybutadiene.
Claim 4
Dependent Claim
25 words
The method according to claim 1 further comprising the step of applying over said polyurethane coating an acrylic polyurethane or a fluorocarbon polyurethane top coating.
Claim 5
Dependent Claim
12 words
The method according to claim 3, wherein said backbone chain is polybutadiene.
Claim 6
Dependent Claim
21 words
The method according to claim 1, wherein the polyol component has an average hydroxyl number from 45 to 450 mg KOH/g.
Claim 7
Dependent Claim
29 words
The method according to claim 1, wherein component (A) and component (B) are mixed together while or shortly before the composition is applied to the concrete or mortar construction.
Claim 8
Dependent Claim
19 words
The method according to claim 1, wherein (A) is a mixture of the polyol component and the polyamine component.
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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |