US4853418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane emulsion, sheet-like porous material making use of the emulsion and production process of the material
Assignee: Dainichiseika Color and Chemicals Mfg Co Ltd
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Filing: 1988-08-08
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Granted: 1989-08-01
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Expires: 2008-08-08
Abstract
Abstract A polyurethane emulsion is composed of an organic solvent solution of a polyurethane resin containing silicone segments and/or fluorocarbon segments as backbones and/or side chains and water emulsified in the organic solvent solution. A sheet-like porous material having a porous layer of a polyurethane resin provided on a base material is produced by using the above polyurethane emulsion to form the porous layer.
Inventors
- 👤 Kazuyuki Hanada
- 👤 Iwao Misaizu
- 👤 Masashi Kashimura
- 👤 Tomoko Goto
- 👤 Katsumi Kuriyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:54
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/283; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/288; C08G18/2885; C08G18/289; C08G18/40; C08G18/61; C08J3/00; C08J3/02; C08J3/09; D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
31 words
A polyurethane emulsion comprising: an organic solvent solution of a polyurethane resin containing silicone segments and/or fluorocarbon segments as backbones and/or side chains; and water emulsified in the organic solvent solution.
Claim 2
Dependent Claim
31 words
A polyurethane emulsion comprising: an organic solvent solution of a polyurethane resin containing silicone segments and/or fluorocarbon segments as backbones and/or side chains; and water emulsified in the organic solvent solution.
Claim 3
Dependent Claim
24 words
The polyurethane emulsion as claimed in claim 1, wherein the silicone segments and fluorocarbon segments amount to 0.2-50 wt.% of the whole polyurethane resin.
Claim 4
Dependent Claim
35 words
In a sheet-like porous material having a porous layer of a polyurethane resin provided on a base material, the improvement wherein the polyurethane resin has silicone segments and/or fluorocarbon segments as backbones and/or side chains.
Claim 5
Dependent Claim
35 words
In a sheet-like porous material having a porous layer of a polyurethane resin provided on a base material, the improvement wherein the polyurethane resin has silicone segments and/or fluorocarbon segments as backbones and/or side chains.
Claim 6
Dependent Claim
25 words
The sheet-like porous material as claimed in claim 3, wherein the silicone segments and fluorocarbon segments amount to 0.2-50 wt.% of the whole polyurethane resin.
Claim 7
Dependent Claim
63 words
In a process for producing a sheet-like porous material by impregnating and/or coating a base material with a water-in-oil type polyurethane emulsion and then gelling and drying the emulsion, the improvement wherein the polyurethane emulsion comprises: an organic solvent solution of a polyurethane resin containing silicone segments and/or fluorocarbon segments as backbones and/or side chains; and water emulsified in the organic solvent solution.
Claim 8
Dependent Claim
63 words
In a process for producing a sheet-like porous material by impregnating and/or coating a base material with a water-in-oil type polyurethane emulsion and then gelling and drying the emulsion, the improvement wherein the polyurethane emulsion comprises: an organic solvent solution of a polyurethane resin containing silicone segments and/or fluorocarbon segments as backbones and/or side chains; and water emulsified in the organic solvent solution.
Claim 9
Dependent Claim
23 words
The process as claimed in claim 5, wherein the silicone segments and fluorocarbon segments amount to 0.2-50 wt.% of the whole polyurethane resin.
References Cited (Backward Citations)
US3418198A
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GB1294711A
Cited
US3546001A
Cited
US4086193A
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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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |