US4680212A
Expired / Lapsed
US
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Stain resistant nylon fibers
Assignee: Solutia Inc
•
Filing: 1986-10-02
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Granted: 1987-07-14
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Expires: 2006-10-02
Abstract
Abstract Nylon carpet fibers are provided which resist staining by acid dye colorants at room temperature, yet are dyeable at elevated temperatures with acid dyes without losing their resistance to acid dye colorants at room temperature. The fibers are characterized by having a coating on the surface thereof comprising one or more selected compounds (stain blockers). Carpets comprising the fibers resist staining when exposed for long periods of time to spills containing acid dye colorants. By also including a fluorochemical in the coating, the carpets can resist such staining even after being subjected to heavy human trafficking.
Inventors
- 👤 Randolph C. Blyth
- 👤 Pompelio A. Ucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:04
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/41; D06M15/412; D06M15/21; D06M15/263; D06M15/277; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23993; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
56 words
An undyed stain resistant nylon fiber characterized by having a coating on the surface thereof comprising one or more stain blockers in an amount sufficient to provide a fiber having a dye absorption test value at 25° C. of no greater than 7% and a dye absorption value at 100° C. of no less than 30%.
Claim 2
Dependent Claim
56 words
An undyed stain resistant nylon fiber characterized by having a coating on the surface thereof comprising one or more stain blockers in an amount sufficient to provide a fiber having a dye absorption test value at 25° C. of no greater than 7% and a dye absorption value at 100° C. of no less than 30%.
Claim 3
Dependent Claim
11 words
The fiber of claim 1 wherein the nylon is nylon 66.
Claim 4
Dependent Claim
19 words
The fiber of claim 1 wherein the denier of said fiber is in the range of 8 to 24.
Claim 5
Dependent Claim
8 words
The fiber of claim 3 in staple form.
Claim 6
Dependent Claim
9 words
The fiber of claim 3 in continuous filament form.
Claim 7
Dependent Claim
9 words
A yarn composed of the fibers of claim 4.
Claim 8
Dependent Claim
9 words
A yarn composed of the fibers of claim 5.
Claim 9
Dependent Claim
16 words
The fiber of claim 1 wherein said dye absorption value at 25° C. is substantially zero.
Claim 10
Dependent Claim
49 words
The fiber of claim 1 wherein said coating also comprises one or more fluorochemical(s) in an amount sufficient to provide fiber having the ability when made into carpet of retaining a greater portion of its original stain resistance after trafficking than if the fluorochemical were omitted from the coating.
Claim 11
Dependent Claim
81 words
The fiber of claim 1 wherein said stain blockers are polymeric condensation products consisting essentially of repeating units of the formula ##STR8## where R is the same or different in each unit and is hydrogen or a radical selected from the group consisting of --SO 3 X, ##STR9## where X is hydrogen or a cation, wherein at least 40% of said repeating units contain an --SO 3 X radical and at least 40% of the repeating units contain the ##STR10## linkage.
Claim 12
Dependent Claim
22 words
The fiber of claim 10 wherein said condensation products are mixed condensation products of phenol sulfonic acid with dihydroxy diphenolsulfone and formaldehyde.
Claim 13
Dependent Claim
22 words
The fiber of claim 1 wherein said stain blockers are mixed condensation products of naphthalene monosulfonic acids with dihydroxy diphenylsulfones and formaldehyde.
Claim 14
Dependent Claim
12 words
A carpet having a pile consisting essentially of fibers of claim 1.
Claim 15
Dependent Claim
14 words
The carpet of claim 13 wherein the carpet is of a cut pile construction.
Claim 16
Dependent Claim
12 words
The carpet of claim 14 wherein the fibers are nylon 66 fibers.
Claim 17
Dependent Claim
49 words
An undyed nylon fiber characterized by having a coating on the surface thereof comprising one or more stain blockers in an amount sufficient to provide a fiber having dye absorption test values within the range represented by the area under Curve C and above Curve E in FIG. 1.
Claim 18
Dependent Claim
49 words
An undyed nylon fiber characterized by having a coating on the surface thereof comprising one or more stain blockers in an amount sufficient to provide a fiber having dye absorption test values within the range represented by the area under Curve C and above Curve E in FIG. 1.
Claim 19
Dependent Claim
12 words
A carpet having a pile consisting essentially of fibers of claim 16.
Claim 20
Dependent Claim
12 words
The carpet of claim 17 wherein the fibers are nylon 66 fibers.
Claim 21
Dependent Claim
49 words
An undyed nylon fiber characterized by having a coating on the surface thereof comprising one or more stain blockers in an amount sufficient to provide a fiber having dye absorption test values within the range represented by the area under Curve D and above Curve E in FIG. 1.
Claim 22
Dependent Claim
49 words
An undyed nylon fiber characterized by having a coating on the surface thereof comprising one or more stain blockers in an amount sufficient to provide a fiber having dye absorption test values within the range represented by the area under Curve D and above Curve E in FIG. 1.
Claim 23
Dependent Claim
12 words
A carpet having a pile consisting essentially of fibers of claim 19.
Claim 24
Dependent Claim
12 words
The carpet of claim 20 wherein the fibers are nylon 66 fibers.
Claim 25
Dependent Claim
96 words
A process for improving the ability of nylon fibers to resist staining at room temperature by acid dyes while retaining their ability to be dyed with acid dyes at elevated temperatures which comprises applying a spin finish to said fibers during the melt polymerization process by which said fibers are prepared, said finish being characterized in containing one or more stain blocker(s) in an amount sufficient to provide a nylon fiber having a dye absorption value at 25° C. of no greater than 7% and a dye absorption value at 100° C. of no less 30%.
Claim 26
Dependent Claim
96 words
A process for improving the ability of nylon fibers to resist staining at room temperature by acid dyes while retaining their ability to be dyed with acid dyes at elevated temperatures which comprises applying a spin finish to said fibers during the melt polymerization process by which said fibers are prepared, said finish being characterized in containing one or more stain blocker(s) in an amount sufficient to provide a nylon fiber having a dye absorption value at 25° C. of no greater than 7% and a dye absorption value at 100° C. of no less 30%.
Claim 27
Dependent Claim
11 words
The process of claim 22 wherein the nylon is nylon 66.
Claim 28
Dependent Claim
21 words
The process of claim 22 wherein said finish contains, in addition to one or more stain blockers, one or more fluorochemicals.
Claim 29
Dependent Claim
45 words
The process of claim 24 wherein the stain blocker(s) and fluorochemical are present in amounts sufficient to provide fiber coated with from 0.20 to 0.35% by weight of the stain blocker and from 450 to 650 ppm of fluorine, based on the weight of nylon.
Claim 30
Dependent Claim
81 words
The process of claim 22 wherein said stain blockers are polymeric condensation products consisting essentially of repeating units of the formula ##STR11## where R is the same or different in each unit and is hydrogen or a radical selected from the group consisting of --SO 3 X, ##STR12## where X is hydrogen or a cation, wherein at least 40% of said repeating units contain an --SO 3 X radical and at least 40% of the repeating units contain the ##STR13## linkage.
Claim 31
Dependent Claim
22 words
The process of claim 26 wherein said condensation products are mixed condensation products of phenol sulfonic acid with dihydroxy diphenolsulfone and formaldehyde.
Claim 32
Dependent Claim
22 words
The process of claim 22 wherein said stain blockers are mixed condensation products of naphthalene monosulfonic acids with dihydroxy diphenylsulfones and formaldehyde.
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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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |