US4501591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for conveniently providing stain-resistant polyamide carpets
Assignee: Monsanto Co
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Filing: 1984-06-29
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Granted: 1985-02-26
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Expires: 2004-06-29
Abstract
Abstract The invention relates to an improvement in certain processes for continuously dyeing polyamide carpets whereby stain resistance is imparted to the carpets during the dyeing process. The improvement involves adding an alkali metal silicate (e.g. sodium meta silicate) and a sulfonated phenol-formaldehyde condensation product to the dye liquor used in the dyeing process. If either the silicate or condensation product is omitted from the liquor, the improvement is not achieved. The improvement provides a convenient and economical means for providing stain resistant polyamide carpets.
Inventors
- 👤 Pompelio A. Ucci
- 👤 Randolph C. Blyth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:22
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/56; D06M; D06M11/00; D06M11/77; D06M11/79; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/41; D06M15/412; D06P1/673; D06P1/67383; D06P3/00; D06P3/02; D06P3/04; D06P3/24; Y; Y10; Y10S; Y10S8/00; Y10S8/929
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
In a process for continuously dyeing a carpet having a pile consisting essentially of polyamide fibers wherein an endless length of the carpet is passed through a treating zone in which the carpet is first prewetted, then treated with an aqueous dye liquor wherein the liquor ratio is in the range of 1.5:1.0 to 4.5:1.0, then, subjected to an atmosphere of steam to fix the dye on the carpet, then washed with water to remove residual liquor from the carpet and, finally, dried, the improvement of imparting stain resistance to the carpet comprising adding a silicate of the formula M 2 O.mSiO 2 and either a sulfonated phenol-formaldehyde condensation product or a sulfonated naphthol-formaldehyde condensation product or mixtures thereof to the liquor each in an amount sufficient in combination to impart stain resistance to the carpet, where M is an alkali metal and m is a number ranging from about 0.5 to 2.0.
Claim 2
Dependent Claim
153 words
In a process for continuously dyeing a carpet having a pile consisting essentially of polyamide fibers wherein an endless length of the carpet is passed through a treating zone in which the carpet is first prewetted, then treated with an aqueous dye liquor wherein the liquor ratio is in the range of 1.5:1.0 to 4.5:1.0, then, subjected to an atmosphere of steam to fix the dye on the carpet, then washed with water to remove residual liquor from the carpet and, finally, dried, the improvement of imparting stain resistance to the carpet comprising adding a silicate of the formula M 2 O.mSiO 2 and either a sulfonated phenol-formaldehyde condensation product or a sulfonated naphthol-formaldehyde condensation product or mixtures thereof to the liquor each in an amount sufficient in combination to impart stain resistance to the carpet, where M is an alkali metal and m is a number ranging from about 0.5 to 2.0.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the condensation product contains sulfone groups.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein said silicate is a sodium silicate.
Claim 5
Dependent Claim
21 words
The process of claim 3 wherein at least one of the phenols is phenolsulfonic acid or an alkali metal salt thereof.
Claim 6
Dependent Claim
36 words
The process of claim 1 wherein said condensation product is the condensation product of formaldehyde and a mixture of phenols consisting essentially of a phenolsulfonic acid or an alkali metal salt thereof and a diphenol sulfone.
Claim 7
Dependent Claim
28 words
The process of claim 5 wherein the mole ratio of said sulfonic acid or salt thereof to said sulfone phenols is in the range of 1:3 to 3:1.
Claim 8
Dependent Claim
19 words
The process of claim 5 wherein the weight ratio of said silicate to condensation product is at least 1:1.
Claim 9
Dependent Claim
32 words
The process of claim 5 wherein said the dye liquor contains a sufficient amount of condensation product to provide at least 0.1% by weight thereof, based on the weight of said fibers.
Claim 10
Dependent Claim
12 words
The process of claim 5 wherein said silicate is sodium meta silicate.
Claim 11
Dependent Claim
12 words
The process of claim 5 wherein said fibers are nylon 66 fibers.
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) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |