Patent US4752502A successfully refreshed from Google Patents.
US4752502A
Expired / Lapsed
US
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Nitrocellulose-urethane traffic paint
Assignee: GREEN TREE CHEMICAL TECHNOLOGIES Inc
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Filing: 1987-03-16
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Granted: 1988-06-21
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Expires: 2007-03-16
Abstract
Abstract Disclosed is a process for forming a paint marking on a roadway surface using a paint composition comprising (a) a paint vehicle comprising the reaction product of nitrocellulose, a polymeric hydroxyalkyl acrylate modifier, and an isocyanate resin as the binder, and a solvent, and (b) pigment in an amount sufficient to color the paint composition.
Inventors
- 👤 Charles M. Winchester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:27
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/004; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4081
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
A process for forming a paint marking on a roadway surface comprising (a) forming a paint composition by mixing, in a closed system, a solution comprising from about 0.2 to about 0.9 OH molar equivalents nitrocellulose and from about 0.1 to about 0.8 OH molar equivalents hydroxyacrylic resin with a solution comprising from about 0.75 to about 1.25 NCO molar equivalents isocyanate resin at an NCO/OH ratio of from about 0.75/1.0 to about 1.15/1.0, and an amount of pigment sufficient to color said paint composition, (b) releasing said composition through a spray nozzle, and (c) directing the spray onto a roadway surface.
Claim 2
Dependent Claim
102 words
A process for forming a paint marking on a roadway surface comprising (a) forming a paint composition by mixing, in a closed system, a solution comprising from about 0.2 to about 0.9 OH molar equivalents nitrocellulose and from about 0.1 to about 0.8 OH molar equivalents hydroxyacrylic resin with a solution comprising from about 0.75 to about 1.25 NCO molar equivalents isocyanate resin at an NCO/OH ratio of from about 0.75/1.0 to about 1.15/1.0, and an amount of pigment sufficient to color said paint composition, (b) releasing said composition through a spray nozzle, and (c) directing the spray onto a roadway surface.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the hydroxyacrylic resin is a copolymer of a hydroxyalkyl acrylate or methacrylate with an alkyl acrylate or methacrylate.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein the isocyanate resin is a hexamethylene diisocyanate biuret, a trimer of hexamethylene diisocyanate or a diphenylmethane diisocyanate resin.
Claim 5
Dependent Claim
26 words
The process of claim 1 wherein the mixing takes place in the presence of a catalyst to promote the reaction between the isocyanate and hydroxyl groups.
Claim 6
Dependent Claim
33 words
The process of claim 1 wherein the paint composition is heated to a temperature above ambient temperature and below the temperature at which said paint composition decomposes, before application to the roadway surface.
Claim 7
Dependent Claim
28 words
The process of claim 1 wherein the solution of nitrocellulose and hydroxyacrylic resin also comprises up to about 0.4 OH equivalents of a plasticizer having --OH functional groups.
Claim 8
Dependent Claim
19 words
The process of claim 6 wherein the plasticizer having --OH functional groups is a castor oil-azelaic acid alkyd resin.
Claim 9
Dependent Claim
19 words
The process of claim 6 wherein the plasticizer having --OH functional groups is a polyether derived from propylene glycol.
Claim 10
Dependent Claim
26 words
The process of claim 6 wherein the mixing takes place in the presence of a catalyst to promote the reaction between the isocyanate and hydroxyl groups.
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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) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |