US4073975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for flatting glossy surfaces of urethane polymers
Assignee: Armstrong World Industries Inc
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Filing: 1976-09-11
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Granted: 1978-02-14
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Expires: 1996-09-11
Abstract
Abstract A process for flatting a glossy polyurethane surface is disclosed. The process involves the steps of forming a wear layer on a carrier member, such comprising a polyurethane-forming composition. The coated carrier member is then treated with vaporous water at a temperature below the dew point of the vaporous water so that a film of liquid water is deposited on the surface of the coating. The coating with the liquid water deposited thereon is then cured to a tack free state and then subjected to elevated temperatures where the curing of the polyurethane coating is completed.
Inventors
- 👤 Mervin R. Buckwalter
- 👤 Edgar W. Knaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
D; D06; D06C; D06C29/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
114 words
A process for delustering a glossy polyurethane surface comprising: (a) applying to a carrier member a coating of a solution of a curable polyurethane-forming composition in a diluent consisting of a solvent for said polyurethane-forming composition; (b) treating the coated carrier member with vaporous water at a temperature of 70° to 200° F., said carrier member at a temperature of 60° to 150° F. and below the dew point of said vaporous water whereby a thin film of liquid water is deposited on the surface of said coatings; (c) partially curing said coating having said thin film of water deposited thereon to a tack-free state; and (d) completing the cure of said polyurethane-forming composition.
Claim 2
Dependent Claim
114 words
A process for delustering a glossy polyurethane surface comprising: (a) applying to a carrier member a coating of a solution of a curable polyurethane-forming composition in a diluent consisting of a solvent for said polyurethane-forming composition; (b) treating the coated carrier member with vaporous water at a temperature of 70° to 200° F., said carrier member at a temperature of 60° to 150° F. and below the dew point of said vaporous water whereby a thin film of liquid water is deposited on the surface of said coatings; (c) partially curing said coating having said thin film of water deposited thereon to a tack-free state; and (d) completing the cure of said polyurethane-forming composition.
Claim 3
Dependent Claim
57 words
The process in accordance with claim 1 wherein said polyurethane-forming composition is the reaction product of at least one cycloaliphatic diisocyanate and at least one polyol selected from the group consisting of polyalkylene ether polyol of molecular weight 300-5000 and polyester polyol of melting point less than 70° C. wherein the NCO:OH is from 1.2:1 to 2.2:1.
Claim 4
Dependent Claim
22 words
The process in accordance with claim 1 wherein said carrier member is at said temperature for from 1 minute to 24 hours.
Claim 5
Dependent Claim
123 words
A flatted polyurethane surface comprising depressions in said surface of up to about 3 microns and formed by: a. applying to a carrier member a coating of a solution of a curable polyurethane-forming composition in a diluent consisting of a solvent for said polyurethane-forming composition; b. treating the coated carrier member with vaporous water at a temperature of 70° to 200° F., said carrier member at a temperature of 60° to 150° F. and below the dew point of said vaporous water whereby a thin film of liquid water is deposited on the surface of said coatings; c. partially curing said coating having said thin film of water deposited thereon to a tack-free state; and d. completing the cure of said polyurethane-forming composition.
Claim 6
Dependent Claim
123 words
A flatted polyurethane surface comprising depressions in said surface of up to about 3 microns and formed by: a. applying to a carrier member a coating of a solution of a curable polyurethane-forming composition in a diluent consisting of a solvent for said polyurethane-forming composition; b. treating the coated carrier member with vaporous water at a temperature of 70° to 200° F., said carrier member at a temperature of 60° to 150° F. and below the dew point of said vaporous water whereby a thin film of liquid water is deposited on the surface of said coatings; c. partially curing said coating having said thin film of water deposited thereon to a tack-free state; and d. completing the cure of said polyurethane-forming composition.
Claim 7
Dependent Claim
24 words
The process in accordance with claim 1 wherein said coated carrier member is at 75° F. and said vaporous water is at 100° F.
Claim 8
Dependent Claim
18 words
The process in accordance with claim 5 wherein said carrier member is at said temperature for 8 hours.
Claim 9
Dependent Claim
14 words
The process in accordance with claim 1 wherein said final cure is 350° F.
References Cited (Backward Citations)
US2084410A
Cited
US3000757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |