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US4535008A
Expired / Lapsed
US
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Moisture-permeable waterproof coated fabric having a microporous polyurethane layer
Assignee: Individual
•
Filing: 1983-10-28
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Granted: 1985-08-13
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Expires: 2003-10-28
Abstract
Abstract A moisture-permeable waterproof coated fabric having a microporous polyurethane layer is obtained by the so-called wet coagulation method using as a coated solution a polar organic solvent solution containing 8 to 25% by weight of a polyurethane elastomer, 0.1 to 10% by weight of a water repellent agent, 0.2 to 3% by weight of polyisocyanate and 1 to 8% by weight of a nonionic surfactant.
Inventors
- 👤 Yasushi Naka
- 👤 Kiyoshi Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:42
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
107 words
A method of making a coated fabric having both water-proofness and moisture permeability characterized in that, in forming a microporous polyurethane layer by applying a polar organic solvent solution of a polyurethane elastomer to a base fabric, then immersing the base fabric in a coagulating bath to allow gelation to take place, followed by water-washing and drying, there is used as the coating solution a polar organic solvent solution containing a polyurethane elastomer and a metal complex represented by the following general formula; ##STR3## where R is a hydrocarbon radical having 8 or more carbon atoms, M is Cr or Al, and A is Cl or OH.
Claim 2
Independent Claim
107 words
A method of making a coated fabric having both water-proofness and moisture permeability characterized in that, in forming a microporous polyurethane layer by applying a polar organic solvent solution of a polyurethane elastomer to a base fabric, then immersing the base fabric in a coagulating bath to allow gelation to take place, followed by water-washing and drying, there is used as the coating solution a polar organic solvent solution containing a polyurethane elastomer and a metal complex represented by the following general formula; ##STR3## where R is a hydrocarbon radical having 8 or more carbon atoms, M is Cr or Al, and A is Cl or OH.
Claim 3
Dependent Claim
49 words
A method according to claim 1 wherein the coating solution further contains from about 0.2 to about 3% by weight of a polyisocyanate, from about 0.1 to about 10% by weight of a water repellant agent and from about 1 to about 8% by weight of a nonionic surfactant.
References Cited (Backward Citations)
US3360394A
Cited
US4137360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |