US4839455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One part moisture curable urethane composition
Assignee: 3M Co
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Filing: 1987-08-28
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Granted: 1989-06-13
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Expires: 2007-08-28
Abstract
Abstract The present invention relates to one-part, moisture-curable, urethane compositions suited as a coating for wood. The composition comprises trisocyanate prepolymer, an epoxy silane, and compatible solvent.
Inventors
- 👤 James J. Fong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/302; C08G18/307; C08G18/38; C08G18/3893; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
55 words
One-part moisture-curable polyurethane composition, consisting essentially of triisocyanate prepolymer, an amount of an epoxy silane compund effective to crosslink said prepolymer and sufficient compatible liquid vehicle to make the composition suitable for application, said epoxy silane compund being sufficiently free of active hydrogen-containing functional groups to avoid premature gelation of the prepolymer when combined therewith.
Claim 2
Dependent Claim
55 words
One-part moisture-curable polyurethane composition, consisting essentially of triisocyanate prepolymer, an amount of an epoxy silane compund effective to crosslink said prepolymer and sufficient compatible liquid vehicle to make the composition suitable for application, said epoxy silane compund being sufficiently free of active hydrogen-containing functional groups to avoid premature gelation of the prepolymer when combined therewith.
Claim 3
Dependent Claim
29 words
The composition of claim 1 wherein said triisocyanate prepolymer is a reaction product of a diisocyanate with a member selected from the group consisting of a triol and 1,3,5-triazine.
Claim 4
Dependent Claim
19 words
The composition of claim 2 wherein said diisocyanate is selected from the group conisting of aromatic and aliphatic diisocyanates.
Claim 5
Dependent Claim
22 words
The composition of claim 1 wherein said epoxy silane is selected from the group consisting of gamma glycidoxypropyltrimethoxy silane and beta-(3,4-epoxycyclohexyl)ethyltrimethyloxy silane.
Claim 6
Dependent Claim
21 words
The composition of claim 1 wherein said composition having a stable shelf life also includes sufficient flattening agent to reduce gloss.
Claim 7
Dependent Claim
69 words
One-part moisture-curable polyurethane composition, consisting essentially of triisocyanate prepolymer, a sufficient amount of diisocyanate prepolymer to improve the flexibility of the cured composition, an amount of an epoxy silane compund effective to cross-link said prepolymers and sufficient compatible liquid vehicle to make the composition suitable for application, said epoxy silane compound being sufficiently free of active hydrogen-containing functional groups to avoid premature gelation of the prepolymers when combined therewith.
Claim 8
Dependent Claim
69 words
One-part moisture-curable polyurethane composition, consisting essentially of triisocyanate prepolymer, a sufficient amount of diisocyanate prepolymer to improve the flexibility of the cured composition, an amount of an epoxy silane compund effective to cross-link said prepolymers and sufficient compatible liquid vehicle to make the composition suitable for application, said epoxy silane compound being sufficiently free of active hydrogen-containing functional groups to avoid premature gelation of the prepolymers when combined therewith.
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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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |