US4767836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage stable polyurethane coating
Assignee: Huntsman Corp
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Filing: 1987-05-18
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Granted: 1988-08-30
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Expires: 2007-05-18
Abstract
Abstract A storage stable polyurethane coating composition which may be heat cured under relatively mild conditions comprising an isocyanate which has been chemically blocked and a curing agent comprising a partially alkoxylated polyoxyalkylene amine is described.
Inventors
- 👤 Michael Cuscurida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:29
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/3275; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/70; C08G18/72; C08G18/80; C08G18/8061
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
A storage stable, heat curable polyurethane coating comprising a blocked isocyanate and a curing agent comprising a partially alkoxylated polyoxyalkylene amine of the general formula: ##STR4##
Claim 2
Dependent Claim
26 words
A storage stable, heat curable polyurethane coating comprising a blocked isocyanate and a curing agent comprising a partially alkoxylated polyoxyalkylene amine of the general formula: ##STR4##
Claim 3
Dependent Claim
44 words
A heat curable polyurethane coating as in claim 1 wherein the curing agent comprises a partially alkoxylated polyoxyalkylene amine of about 200 to 5000 molecular weight with a functionality of about 2 to 3 which has been alkoxylated from about 25 to 75 percent.
Claim 4
Dependent Claim
39 words
A storage stable, heat curable polyurethane coating comprising a blocked isocyanate and a curing agent comprising a partially alkoxylated polyoxyalkylene amine wherein the isocyanate is a prepolymer and the partially alkoxylated polyoxyalkylene amine is of the general formula: ##STR5##
Claim 5
Dependent Claim
39 words
A storage stable, heat curable polyurethane coating comprising a blocked isocyanate and a curing agent comprising a partially alkoxylated polyoxyalkylene amine wherein the isocyanate is a prepolymer and the partially alkoxylated polyoxyalkylene amine is of the general formula: ##STR5##
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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) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |