US4803116A
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Waterproof fabric having high moisture permeability and method of making same
Assignee: Toray Industries Inc
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Filing: 1986-10-30
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Granted: 1989-02-07
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Expires: 2006-10-30
Abstract
Abstract A waterproof fabric having a high moisture permeability and having an ultra-microporous continuous polymer coating having an average pore diameter in the range of between 50 Å and 0.2μ, said polymer having a monomer unit containing at least one acid radical selected from carboxyl group, sulfonic acid group, and alkali metal salts thereof.
Inventors
- 👤 Jiro Amano
- 👤 Masato Shimada
- 👤 Kouzou Takano
- 👤 Shunroku Tohyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:05
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/46; C08G18/4676; A; A47; A47G; A47G9/00; A47G2009/001; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/24998; Y10T428/31504; Y10T428/31551; Y10T442/00; Y10T442/20; Y10T442/2033; Y10T442/2139; Y10T442/2148; Y10T442/2221; Y10T442/2246
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
53 words
A waterproof fabric having a high moisture permeability and having an ultra-microporous continuous polymer coating having an average pore diameter in the range of between 50 Å and 0.2μ, said polymer having a monomer unit containing at least one acid radical selected from carboxyl group, sulfonic acid group, and alkali metal salts thereof.
Claim 2
Dependent Claim
53 words
A waterproof fabric having a high moisture permeability and having an ultra-microporous continuous polymer coating having an average pore diameter in the range of between 50 Å and 0.2μ, said polymer having a monomer unit containing at least one acid radical selected from carboxyl group, sulfonic acid group, and alkali metal salts thereof.
Claim 3
Dependent Claim
32 words
A waterproof fabric having a high moisture permeability as set forth in claim 1, wherein said polymer coating has an average pore diameter in the range of between 50 Å and 0.1μ.
Claim 4
Dependent Claim
32 words
A waterproof fabric having a high moisture permeability as set forth in claim 1, wherein said polymer coating has an average pore diameter in the range of between 80 Å and 0.05μ.
Claim 5
Dependent Claim
29 words
A waterproof fabric having a high moisture permeability as set forth in claim 1, wherein said polymer containing at least 5% by weight of said acid radical-containing monomer unit.
Claim 6
Dependent Claim
29 words
A waterproof fabric having a high moisture permeability as set forth in claim 1, wherein said polymer contains at least 9% by weight of said acid radical-containing monomer unit.
Claim 7
Dependent Claim
30 words
A waterproof fabric having a high moisture permeability as set forth in claim 1, wherein said acid radical-containing monomer unit is present in a homopolymerized, random-copolymerized, block-copolymerized or graft-copolymerized state.
Claim 8
Dependent Claim
21 words
A waterproof fabric having a high moisture permeability as set forth in claim 1, wherein said polymer is an elastomeric polymer.
Claim 9
Dependent Claim
20 words
A waterproof fabric having a high moisture permeability as set forth in claim 7, wherein said elastomeric polymer is polyurethane.
Claim 10
Dependent Claim
47 words
A waterproof fabric having a high moisture permeability as set forth in claim 1, wherein said acid radical-containing monomer unit has been derived from an olefinic unsaturated carboxylic acid, a sulfonic acid group-containing aromatic dicarboxylic acid, or an aliphatic aminoacid having not more than two carboxyl groups.
Claim 11
Dependent Claim
32 words
A waterproof fabric having a high moisture permeability as set forth in claim 1, wherein said polymer is a blend of a polymer having said acid radical-containing monomer unit and another polymer.
Claim 12
Dependent Claim
41 words
A waterproof fabric having a high moisture permeability as set forth in claim 10, wherein said blend comprises at least 30% by weight of a polymer having said acid radical-containing monomer unit and at most 70% by weight of another polymer.
Claim 13
Dependent Claim
69 words
A waterproof fabric having a high moisture permeability as set forth in claim 1, having a moisture permeability M 1 not lower than 4,000 g/m 2 ·24 hr as measured according to the method defined by ASTM-E96-66B, and wherein the difference between a moisture permeability M 2 as measured according to the method defined by ASTM-E96-66BW and said M 1 is not smaller than 4,000 g/m 2 ·24 hr.
Claim 14
Dependent Claim
32 words
A waterproof fabric having a high moisture permeability as set forth in claim I2, wherein the difference between M 2 and M 1 is not smaller than 8,000 g/m 2 ·24 hr.
Claim 15
Independent Claim
138 words
A method of making a waterproof fabric having a high moisture permeability and having thereon an ultra-microporous continuous polymer coating, said polymer coating container an acid radical-containing monomer unit or an alkali metal salt thereof and having an average pore diameter in the range of between 50 Å and 0.2μ, said method comprising: (a) applying to a fabric a solution of a polymer which does not contain an acid group, (b) forming a coating of said polymer on said fabric by a dry, a wet or a dry-wet coagulation process, (c) graft copolymerizing said polymer with a graft-polymerizable carboxylic acid or sulfonic acid compound, or an ester of either compound, and (d) treating said graft copolymer with an acid or an alkali solution, if necessary to provide the acid radical monomer unit or the alkali metal salt thereof.
Claim 16
Independent Claim
138 words
A method of making a waterproof fabric having a high moisture permeability and having thereon an ultra-microporous continuous polymer coating, said polymer coating container an acid radical-containing monomer unit or an alkali metal salt thereof and having an average pore diameter in the range of between 50 Å and 0.2μ, said method comprising: (a) applying to a fabric a solution of a polymer which does not contain an acid group, (b) forming a coating of said polymer on said fabric by a dry, a wet or a dry-wet coagulation process, (c) graft copolymerizing said polymer with a graft-polymerizable carboxylic acid or sulfonic acid compound, or an ester of either compound, and (d) treating said graft copolymer with an acid or an alkali solution, if necessary to provide the acid radical monomer unit or the alkali metal salt thereof.
Claim 17
Independent Claim
130 words
A method of making a waterproof fabric having a high moisture permeability and having thereon an ultra-microporous continuous polymer coating, said polymer coating containing an acid radical-containing monomer unit or an alkali metal salt thererof and having an average pore diameter in the range of between 50 Å and 0.2μ, said method comprising: (a) applying to a fabric a solution of a polymer prepared from a monomer containing a carboxylic acid group, a sulfonic acid group or an alkali metal salt of either, (b) forming a coating of said polymer on said fabric by a dry, a wet or a dry-wet coagulation process, and (c) treating said polymer with an alkali or an acid solution, if necessary to provide the acid radical monomer unit or the alkali metal salt thereof.
Claim 18
Independent Claim
130 words
A method of making a waterproof fabric having a high moisture permeability and having thereon an ultra-microporous continuous polymer coating, said polymer coating containing an acid radical-containing monomer unit or an alkali metal salt thererof and having an average pore diameter in the range of between 50 Å and 0.2μ, said method comprising: (a) applying to a fabric a solution of a polymer prepared from a monomer containing a carboxylic acid group, a sulfonic acid group or an alkali metal salt of either, (b) forming a coating of said polymer on said fabric by a dry, a wet or a dry-wet coagulation process, and (c) treating said polymer with an alkali or an acid solution, if necessary to provide the acid radical monomer unit or the alkali metal salt thereof.
Claim 19
Independent Claim
129 words
A method of making a waterproof fabric having a high moisture permeability and having thereon an ultra-microporous continuous polymer coating, said polymer coating containing an acid radical-containing monomer unit or an alkali metal salt thereof and having an average pore diameter in the range of between 50 Å and 0.2μ, said method comprising: (a) applying to a fabric a solution of a polymer prepared from a monomer containing a carboxylic acid ester group or a sulfonic acid ester group, (b) forming a coating of said polymer on said fabric by a dry, a wet or a dry-wet coagulation process, and (c) treating said polymer with an acid or an alkali solution during or after the coagulation to provide the acid radical monomer unit or the alkali metal salt thereof.
Claim 20
Independent Claim
129 words
A method of making a waterproof fabric having a high moisture permeability and having thereon an ultra-microporous continuous polymer coating, said polymer coating containing an acid radical-containing monomer unit or an alkali metal salt thereof and having an average pore diameter in the range of between 50 Å and 0.2μ, said method comprising: (a) applying to a fabric a solution of a polymer prepared from a monomer containing a carboxylic acid ester group or a sulfonic acid ester group, (b) forming a coating of said polymer on said fabric by a dry, a wet or a dry-wet coagulation process, and (c) treating said polymer with an acid or an alkali solution during or after the coagulation to provide the acid radical monomer unit or the alkali metal salt thereof.
Claim 21
Dependent Claim
45 words
A method as set forth in claim 16, wherein the polymer having a sulfonic acid ester group-containing monomer unit is either a copolymer obtained by a condensation polymerization of a γ-alkyl glutamate-N-carboxylic anhydride and an isocyanate end group-containing prepolymer, or a homopolymer of γ-alkyl glutamate.
Claim 22
Dependent Claim
45 words
A method as set forth in claim 15, the polymer having a sulfonic acid group-containing monomer unit is a copolymer obtained by a condensation polymerization of a polyester diol prepolymer and a diisocyanate compound, said polyester diol prepolymer being obtained from sulfoisophthalic acid and diol.
Claim 23
Independent Claim
25 words
A method as set forth in claims 14, 15, 16 wherein said polymer contains at least 5% by weight of said acid radical-containing monomer unit.
Claim 24
Independent Claim
25 words
A method as set forth in claims 14, 15, 16 wherein said polymer contains at least 9% by weight of said acid radical-containing monomer unit.
Claim 25
Independent Claim
28 words
A method as set forth in claims 14, 15, 16 wherein said polymer is a blend of a polymer having said acid radical-containing monomer unit and another polymer.
Claim 26
Dependent Claim
36 words
A method as set forth in claim 21, wherein said blend comprises at least 30% by weight of the polymer having said acid radical-containing monomer unit and at most 70% by weight of said another polymer.
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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |