US4448922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coagulated polyurethane coating compositions
Assignee: NORWOOD INDUSTRIES Inc 100 NORTH MOREHALL RD MALVERN PA 19355 A CORP OF
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Filing: 1982-07-14
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Granted: 1984-05-15
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Expires: 2002-07-14
Abstract
Abstract An aqueous coating composition is comprised of an aqueous anionic polyurethane dispersion and a salt of hydrofluorosilicic acid, wherein the pH of the composition is acidic and the composition is thixotropic. The composition is particularly useful for coating irregular substrates to form a regular surface thereon.
Inventors
- 👤 John R. McCartney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:26
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C14; C14C; C14C11/00; C14C11/003; C14C11/006; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08K; C08K3/00; C08K3/34; C09; C09D; C09D175/00; C09D175/04; C09D5/00; C09D5/04; D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/48; D04H1/58; D04H1/587; D04H1/64; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
29 words
An aqueous coating composition comprising: an aqueous anionic polyurethane dispersion; and a salt of hydrofluorosilicic acid; wherein the pH of said composition is acidic and said composition is thixotropic.
Claim 2
Dependent Claim
29 words
An aqueous coating composition comprising: an aqueous anionic polyurethane dispersion; and a salt of hydrofluorosilicic acid; wherein the pH of said composition is acidic and said composition is thixotropic.
Claim 3
Dependent Claim
21 words
The coating composition of claim 1 wherein said polyurethane dispersion has a solids content of 10 to 50 percent by weight.
Claim 4
Dependent Claim
21 words
The coating composition of claim 2 wherein said polyurethane dispersion has a solids content of 20 to 35 percent by weight.
Claim 5
Dependent Claim
13 words
The coating composition of claim 1 wherein said polyurethane is a crosslinked polyurethane.
Claim 6
Dependent Claim
24 words
The coating composition of claim 1 wherein said salt of hydrofluorosilicic acid is selected from the group consisting of sodium silicofluoride and potassium silicofluoride.
Claim 7
Dependent Claim
18 words
The coating composition of claim 1 including a buffer to maintain the pH of the composition below 7.
Claim 8
Dependent Claim
11 words
The coating composition of claim 6 wherein said buffer is borax.
Claim 9
Dependent Claim
12 words
The coating composition of claim 1 including a nonionically emulsified neoprene latex.
Claim 10
Dependent Claim
26 words
The coating composition of claim 8 wherein said neoprene latex is present at a level of up to 65 percent by weight solids of said composition.
References Cited (Backward Citations)
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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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |