US4719267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat curable one package polyurethane resin composition
Assignee: Essex Specialty Products LLC
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Filing: 1986-08-06
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Granted: 1988-01-12
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Expires: 2006-08-06
Abstract
Abstract A heat curable one package polyurethane resin composition adaptable to use for automotive seam sealing, particularly under high solids acrylic enamel paints, said composition comprising an isocyanate terminated polyurethane prepolymer having pendant epoxy groups along the polymer chain and the isocyanate groups of which are blocked by reaction with an oxime, and a curing agent having at least two active hydrogen atoms per molecule, such as a polyol, a polyamine, or a blocked polyamine.
Inventors
- 👤 Sidky Rizk
- 👤 Harry W. S. Hsieh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:09
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1021; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C08G18/28; C08G18/40; C08G18/4009; C08G18/4045; C08G2270/00; C09K2003/1034; C09K2003/1059
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
76 words
A one-package, solventless heat curable polyurethane resin composition consisting essentially of (1) an isocyanate terminated polyurethane prepolymer having pendant epoxy groups along the polymer chain and prepared by reacting an excess of a polyisocyanate with a mixture of a polyol and a di-o-methylol derivative of Bisphenol A diglycidyl ether, the isocyanate groups of which prepolymer are blocked by reaction with an oxime; and (2) a curing agent having at least two active hydrogen atoms per molecule.
Claim 2
Dependent Claim
76 words
A one-package, solventless heat curable polyurethane resin composition consisting essentially of (1) an isocyanate terminated polyurethane prepolymer having pendant epoxy groups along the polymer chain and prepared by reacting an excess of a polyisocyanate with a mixture of a polyol and a di-o-methylol derivative of Bisphenol A diglycidyl ether, the isocyanate groups of which prepolymer are blocked by reaction with an oxime; and (2) a curing agent having at least two active hydrogen atoms per molecule.
Claim 3
Dependent Claim
13 words
A composition as in claim 1 wherein said polyol is a polyether polyol.
Claim 4
Dependent Claim
14 words
A composition as in claim 2 wherein said polyether polyol is a polyether diol.
Claim 5
Dependent Claim
14 words
A composition as in claim 3 wherein said polyether diol is a polyoxyalkylene diol.
Claim 6
Dependent Claim
12 words
A composition as in claim 1 wherein said oxime is cyclohexanone oxime.
Claim 7
Dependent Claim
14 words
A composition as claimed in claim 1 wherein said curing agent is an amine.
Claim 8
Dependent Claim
52 words
A composition as in claim 1 wherein said curing agent is polyamide condensation product obtained by reacting approximately equimolecular amounts of an amine selected from the group consisting of diethylene triamine and triethylene tetramine with an anhydride selected from the group consisting of phthalic anhydride, hexahydrophthalic anhydride, maleic anhydride, and succinic anhydride.
Claim 9
Dependent Claim
18 words
A composition as in claim 7 wherein said amine is diethylene triamine and said anhydride is phthalic anhydride.
Claim 10
Dependent Claim
13 words
A composition as in claim 1 wherein said curing agent is a polyol.
Claim 11
Dependent Claim
24 words
A heat curable sealant comprising a composition as in claim 1 in combination with at least one filler suitable for use in elastomeric compositions.
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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) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |