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US5004643A
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US
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Silicone polymer-internally coated webs
Assignee: Nextec Applications Inc
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Filing: 1989-03-10
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Granted: 1991-04-02
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Expires: 2009-03-10
Abstract
Abstract An improved process is provided for treating a porous web (especially fabric) to produce a novel silicone polymer internally coated web. In the process, a starting curable liquid silicone polymer is coated under pressure upon one surface of the web, and the web is then subjected to localized shear forces sufficient to move the silicone polymer composition into interior portions of the web and to distribute the silicone polymer composition generally uniformly therwithin in such planar region. Excess silicone polymer composition is wiped away from a web surface. Thereafter, the resulting web is heated or irradiated to cure the silicone polymer. Preferably a web is preliminarily impregnated with a fluorochemical. Webs procuded by this process are breathable, waterproof or highly water repellent, and flexible.
Inventors
- 👤 J. Michael Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:55
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/514; A61F13/51456; A61F13/51458; A61F13/51462; A61F13/01; A61F13/01008; A61F13/01034; A61F13/01038; A61F13/51401; A61F13/51405; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/52; B; B05; B05C; B05C3/00; B05C3/18; C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; C14; C14C; C14C11/00; C14C9/00; D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64; D06; D06B; D06B15/00; D06B15/08; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/256; D06M15/263; D06M15/356; D06M15/3568; D06M15/37; D06M15/564; D06M15/643; D06M15/653; D06M15/657; D06N; D06N3/00; D06N3/0002; D06N3/04; D06N3/047; D06N3/12; D06N3/128; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/59; D21H19/00; D21H19/10; D21H19/14; D21H19/24; D21H19/32; D21H25/00; D21H25/04; D21H25/06; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/00744; B05C11/00; B05C11/02; B05C11/04; C08J2205/00; C08J2205/04; C08J2205/05; C08J2427/00; C08J2433/00; C08J2475/00; C08J2483/00; D06M2101/00; D06M2101/02; D06M2101/04; D06M2101/06; D06M2101/10; D06M2101/12; D06M2101/16; D06M2101/18; D06M2101/26; D06M2101/30; D06M2101/32; D06M2101/34; D06M2200/00; D06M2200/10; D06M2200/12; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10S428/913; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2189; Y10T442/2221; Y10T442/2238
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
77 words
A flexible porous web which has an internally located coating that is comprised of a curable silicone polymer composition, said coating being positioned in an approximately planar region extending through the web in a direction generally parallel to and spaced from at least one major surface thereof, said web, upon curing the said curable composition thereof, being breathable and highly water repellent and exhibiting a hand and flexibility comparable to the hand flexibility of an untreated web.
Claim 2
Dependent Claim
77 words
A flexible porous web which has an internally located coating that is comprised of a curable silicone polymer composition, said coating being positioned in an approximately planar region extending through the web in a direction generally parallel to and spaced from at least one major surface thereof, said web, upon curing the said curable composition thereof, being breathable and highly water repellent and exhibiting a hand and flexibility comparable to the hand flexibility of an untreated web.
Claim 3
Dependent Claim
49 words
The web of claim 1 wherein said liquid silicone polymer composition has a viscosity of at lesat about 5,000 and less than about 2,000,000 centipoise and the quantity of said silicone polymer composition ranges from about 5 to about 200 weight percent of the weight of the untreated web.
Claim 4
Dependent Claim
22 words
The web produced by curing the curable polymer-containing web of claim 2 wherein said silicone polymer composition is cured and is elastomeric.
Claim 5
Dependent Claim
10 words
The web of claim 1 wherein said web is fibrous.
Claim 6
Dependent Claim
11 words
The web of claim 4 wherein said web is a fabric.
Claim 7
Dependent Claim
10 words
The web of claim 5 wherein said fabric is woven.
Claim 8
Dependent Claim
10 words
The web of claim 5 wherein said fabric is non-woven.
Claim 9
Dependent Claim
14 words
The web of claim 3 wherein said fibers are comprised of a synthetic polymer.
Claim 10
Dependent Claim
25 words
The web of claim 8 wherein said synthetic polymer is selected from the group consisting of polyamides, polyesters, regenerated cellulose, cellulose acetate, and mixtures thereof.
Claim 11
Dependent Claim
13 words
The web of claim 3 wherein said fibers are comprised of natural fibers.
Claim 12
Dependent Claim
21 words
The web of claim 10 wherein said natural fibers are selected from the group consisting of cotton, linen, wool and silk.
Claim 13
Dependent Claim
19 words
The web of claim 3 wherein said fibers are comprised of a mixture of natural fibers and synthetic fibers.
Claim 14
Dependent Claim
19 words
The web of claim 3 wherein said fibers are comprised of a blend of cotton fibers and polyester fibers.
Claim 15
Dependent Claim
18 words
The web of claim 1 wherein said web comprises a laminated fabric and a non-woven porous, flexible substrate.
Claim 16
Dependent Claim
12 words
The laminate of claim 14 wherein said substrate comprises a non-woven fabric.
Claim 17
Dependent Claim
10 words
The web of claim 1 wherein said web is leather.
Claim 18
Dependent Claim
11 words
The web of claim 1 wherein said web is porous paper.
Claim 19
Dependent Claim
15 words
The web of claim 1 wherein said web is an open celled foamed plastic structure.
Claim 20
Dependent Claim
12 words
The web of claim 1 wherein said web is a synthetic leather.
Claim 21
Dependent Claim
29 words
The web of claim 1 wherein said web comprises a laminate comprising a layer of an open celled porous flexible material and a layer of a nonporous, flexible material.
Claim 22
Dependent Claim
15 words
The web in claim 1 containing a fluorocarbon as a result of a fluorocarbon pretreatment.
Claim 23
Dependent Claim
28 words
The web of claim 1 which has a waterproofness of at lesat about 25 pounds per square inch as measured by the modified Federal Hydrostatic Resistance Test 191A-5512.
Claim 24
Dependent Claim
10 words
The web of claim 1 wherein some interstices are open.
Claim 25
Dependent Claim
104 words
A process for producing a porous web that is internally coated with a silicone polymer composition comprising the steps of continuously and successively; (a) tensioning a porous web; (b) uniformly applying, under pressure, to one surface of said tensioned web a curable silicone polymer composition; and (c) applying a transverse shear force uniformly and laterally across and against said surface and concurrently wiping away excess portions of silicone polymer from said surface; where, an internal layer of silicone polymer is formed in an approximately planar region extending through said web in a direction generally parallel to space from at least one major surface thereof.
Claim 26
Dependent Claim
104 words
A process for producing a porous web that is internally coated with a silicone polymer composition comprising the steps of continuously and successively; (a) tensioning a porous web; (b) uniformly applying, under pressure, to one surface of said tensioned web a curable silicone polymer composition; and (c) applying a transverse shear force uniformly and laterally across and against said surface and concurrently wiping away excess portions of silicone polymer from said surface; where, an internal layer of silicone polymer is formed in an approximately planar region extending through said web in a direction generally parallel to space from at least one major surface thereof.
Claim 27
Dependent Claim
33 words
The process of claim 22 wherein, a compressive force is applied uniformly and laterally across and against one surface of said web that wipes away excess portions of said liquid on said surface.
Claim 28
Dependent Claim
35 words
The process of claim 24 wherein the amount of said silicone polymer composition in the product web in the range of about 5 to about 200 weight percent of the weight of the untreated web.
Claim 29
Dependent Claim
19 words
The process of claim 24 comprising an additional step wherein the silicone polymer composition is cured in said web.
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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) | 1994-04-01 | 1994-10-01 | 1995-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-01 | 1998-10-01 | 1999-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-01 | 2002-10-01 | 2003-04-02 | $7700.00 | Window Closed / Lapsed |