US5084306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating fabrics with fluorochemicals
Assignee: Solutia Inc
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Filing: 1990-10-23
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Granted: 1992-01-28
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Expires: 2010-10-23
Abstract
Abstract A process for coating carpets with fluorochemical emulsions is disclosed. The process comprises treating the fabric with a fluorochemical emulsion then heating, rinsing and, finally, drying the treated fabric. The process is characterized in that the emulsion has a pH and divalent metal ion concentration sufficient to effect transfer of the fluorochemical from the emulsion to the carpet during the heating step.
Inventors
- 👤 George R. McLellan
- 👤 Chester C. Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:35
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/188; D06M11/00; D06M11/58; D06M11/64; D06M11/66; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/277; D06M15/37; D06M15/39; D06M15/41; D06M15/412; D06N; D06N3/00; D06N3/04; D06N3/047; D06N7/00; D06N7/0063; D06N7/0065; D06N2201/00; D06N2201/02; D06N2201/0263; D06N2205/00; D06N2205/02; D06N2205/023; D06N2205/10; D06N2207/00; D06N2207/04; D06N2209/00; D06N2209/14; D06N2209/146; D06N2209/147
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
In a process for coating pile fibers of a carpet with fluorochemical particles wherein an emulsion comprising fluorochemical particles is applied to the carpet and then the carpet is dried to remove water and leave said particles thereon as a coating, the improvement of transferring fluorochemical from said emulsion onto said carpet comprising the preliminary step of adding a water-soluble salt of a divalent metal to said emulsion and the additional steps of heating and rinsing the carpet with water after the emulsion is applied thereto and before the carpet is dried, wherein the pH of said emulsion, the divalent metal ion concentration of said emulsion and the period of time and temperature at which said heating step is carried out are selected whereby a greater percentage of said fluorochemical particles is transferred from said emulsion onto said carpet than if said preliminary step and said heating are omitted.
Claim 2
Dependent Claim
149 words
In a process for coating pile fibers of a carpet with fluorochemical particles wherein an emulsion comprising fluorochemical particles is applied to the carpet and then the carpet is dried to remove water and leave said particles thereon as a coating, the improvement of transferring fluorochemical from said emulsion onto said carpet comprising the preliminary step of adding a water-soluble salt of a divalent metal to said emulsion and the additional steps of heating and rinsing the carpet with water after the emulsion is applied thereto and before the carpet is dried, wherein the pH of said emulsion, the divalent metal ion concentration of said emulsion and the period of time and temperature at which said heating step is carried out are selected whereby a greater percentage of said fluorochemical particles is transferred from said emulsion onto said carpet than if said preliminary step and said heating are omitted.
Claim 3
Dependent Claim
12 words
The improvement of claim 1 wherein said pile fibers comprise nylon fibers.
Claim 4
Dependent Claim
73 words
The improvement of claim 1 wherein said fluorochemical particles are applied to said carpet by passing the carpet down between the nip of a pair of flex nip rolls, said emulsion being contained in the space between the rolls and above the nip through which the carpet passes in route to said nip and wherein said heating step is accomplished by passing the carpet from said nip through an atmosphere of saturated steam.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein said pile fibers comprise nylon fibers.
Claim 6
Dependent Claim
48 words
The improvement of claim 3 wherein the tension of the nip rolls on the carpet is adjusted so that the carpet, as it passes through the nip, absorbs 300% by weight of said emulsion and said emulsion contains from 100 to 200 ppm of fluorine, added as fluorochemical.
Claim 7
Dependent Claim
11 words
The improvement of claim 1 wherein said ions are calcium ions.
Claim 8
Dependent Claim
11 words
The improvement of claim 1 wherein said ions are magnesium ions.
Claim 9
Dependent Claim
12 words
The improvement of claim 1 wherein said emulsion additionally contains a stainblocker.
References Cited (Backward Citations)
US3374107A
Cited
US3467612A
Cited
US3991236A
Cited
US4397909A
Cited
EP0102690A1
Cited
US4507324A
Cited
US4592940A
Cited
US4668406A
Cited
US4875901A
Cited
US4695497A
Cited
US4937123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |