US3844862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A method of coating fabrics with polyurethane
Assignee: Atlantic Richfield Co
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Filing: 1972-10-20
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Granted: 1974-10-29
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Expires: 1992-10-20
Abstract
Abstract A coated fabric is prepared by coating a one-package cyclic nitrile carbonate/polyol/catalyst system with appropriate fillers and pigments onto a release surface, such as a teflon coated surface, heating the coating at an elevated temperature to cause foaming and partial gelling or curing of the film, placing a substrate fabric over the partially foamed and cured coating, applying pressure to the surface of the fabric-covered coating sufficient to crush the thermoplastic foam and allow the same to fuse into a continuous film, heating the resulting laminate to finish cure the foamed coating, and, finally, stripping the release surface from the finished coated fabric.
Inventors
- 👤 R Sauer
- 👤 D Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:35
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
A METHOD FOR PREPARING A POLYURETHANE COATED FABRIC; COMPRISING, COATING A ONE-PACKAGE CYCLIC NITRILE CARBONATE/POLYOL COMPOSITION TO A RELEASE SURFACE, HEATING THE COATED RELEASE SURFACE AT A TEMPERATURE SUFFICIENT TO CAUSE FOAMING AND PARTIAL CURING OF THE COATING IN DIRECT CONTACT OVER THE FOAMED AND PARTIALLY CURED COATING IN DIRECT CONTACT WITH THE COATING, APPLYING PRESSURE TO THE FABRIC-COVERED COATING SUFFICIENT TO CRUSH THE FOAM AND FUSE THE SAME INTO A CONTINUOUS FILM; HEATING THE RESULTING COMPRESSED LAMINATE TO A TEMPERATURE SUFFICIENT TO COMPLETE CURING OF SAID COATING; AND STRIPPING THE COATED FABRIC FROM SAID RELEASE SURFACE.
Claim 2
Independent Claim
97 words
A METHOD FOR PREPARING A POLYURETHANE COATED FABRIC; COMPRISING, COATING A ONE-PACKAGE CYCLIC NITRILE CARBONATE/POLYOL COMPOSITION TO A RELEASE SURFACE, HEATING THE COATED RELEASE SURFACE AT A TEMPERATURE SUFFICIENT TO CAUSE FOAMING AND PARTIAL CURING OF THE COATING IN DIRECT CONTACT OVER THE FOAMED AND PARTIALLY CURED COATING IN DIRECT CONTACT WITH THE COATING, APPLYING PRESSURE TO THE FABRIC-COVERED COATING SUFFICIENT TO CRUSH THE FOAM AND FUSE THE SAME INTO A CONTINUOUS FILM; HEATING THE RESULTING COMPRESSED LAMINATE TO A TEMPERATURE SUFFICIENT TO COMPLETE CURING OF SAID COATING; AND STRIPPING THE COATED FABRIC FROM SAID RELEASE SURFACE.
Claim 3
Dependent Claim
15 words
A method in accordance with claim 1 wherein the cyclic nitrile carbonate is adipodinitrile carbonate.
Claim 4
Dependent Claim
26 words
A method in accordance with claim 1 wherein the polyol is a member of the group consisting of polyesters, polyethers, mixed polyester-polyethers and mixtures of these.
Claim 5
Dependent Claim
13 words
A method in accordance with claim 1 wherein the release surface is poly(tetrafluoroethylene).
Claim 6
Dependent Claim
33 words
A method in accordance with claim 1 wherein the coated release surface is foamed and partial cured at a temperature of about 80* to about 200* C. for about 1 to 30 minutes.
Claim 7
Dependent Claim
33 words
A method in accordance with claim 1 wherein the coated release surface is foamed and partial cured at a temperature of about 120* to about 150* C. for about 1 to 3 minutes.
Claim 8
Dependent Claim
16 words
A method in accordance with claim 1 wherein said pressure is about 50 to 100 psig.
Claim 9
Dependent Claim
30 words
A method in accordance with claim 1 wherein the compressed laminate is cured at a temperature of about 80* to about 200* C. for about 1 to about 30 minutes.
Claim 10
Dependent Claim
29 words
A method in accordance with claim 1 wherein the compressed laminate is cured at a temperature of about 120* to about 150* C. for about 7 to 10 minutes.
Claim 11
Dependent Claim
22 words
A method in accordance with claim 1 wherein the release surface is coated to a thickness of about 8 to 10 mils.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |