Patent US4875901A successfully refreshed from Google Patents.
US4875901A
Expired / Lapsed
US
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Treating fibrous polyamide articles
Assignee: 3M Co
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Filing: 1989-02-21
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Granted: 1989-10-24
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Expires: 2009-02-21
Abstract
Abstract A method for providing fibrous polyamide materials with stain resistance is provided. The method comprises contacting the fibrous polyamide materials with an aqueous solution comprising a normally solid, water-soluble, partially sulfonated novolak resin, which comprises the condensation product of at least one phenolic compound and an aldehyde, and a water-soluble divalent metal salt.
Inventors
- 👤 George L. Payet
- 👤 John C. Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:08
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/41; D06M15/412; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
59 words
A method for providing fibrous polyamide materials with stain resistance comprising contacting the fibrous polyamide materials with an aqueous solution comprising a normally solid, water-soluble, partially sulfonated novolak resin, which comprises the condensation product of at least one phenolic compound and an aldehyde, and a water-soluble magnesium salt at a pH in the range of from 2 to 12.
Claim 2
Independent Claim
59 words
A method for providing fibrous polyamide materials with stain resistance comprising contacting the fibrous polyamide materials with an aqueous solution comprising a normally solid, water-soluble, partially sulfonated novolak resin, which comprises the condensation product of at least one phenolic compound and an aldehyde, and a water-soluble magnesium salt at a pH in the range of from 2 to 12.
Claim 3
Dependent Claim
88 words
The method of claim 1 comprising adding to a dyebath, before, during or after dyeing of the polyamide material, at least 0.1% solids based on the weight of the polyamide material of said sulfonated novolak weight of the least 1% based on the weight of the polyamide material of said water-soluble magnesium salt, immersing the polyamide material in the dyebath for a time and temperature sufficient to exhaust the sulfonated novolak resin onto the polyamide material, removing the polyamide material from the dyebath and drying the polyamide material.
Claim 4
Dependent Claim
73 words
The method of claim 1 comprising applying to the polyamide material a solution comprising at least 0.1% solids based on the weight of the polyamide material of said sulfonated novolak resin and at least 1% of said water-soluble magnesium salt based on the weight of the polyamide material, steaming said polyamide material for a time sufficient to effect adherence of said sulfonated novolak resin to said polyamide material, and drying the polyamide material.
Claim 5
Dependent Claim
50 words
The method of claim 1 comprising padding a solution comprising at least 0.1% based on the weight of the polyamide material of said sulfonated novolak resin and 1% based on the weight of the polyamide material of said divalent metal salt onto the polyamide material and drying the polyamide material.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein said water-soluble, divalent metal salt is magnesium sulfate, magnesium chloride, or magnesium acetate.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein said sulfonated novolak resin comprises a sulfonated condensation product of at least one phenolic compound and an aldehyde.
Claim 8
Dependent Claim
20 words
The method of claim 6 wherein said phenolic compound is a bis(hydroxyphenyl) sulfone and said aldehyde is formaldehyde or acetaldehyde.
Claim 9
Dependent Claim
18 words
The method of claim 1 wherein said aqueous solution further contains a fluorochemical oil and water repellent composition.
Claim 10
Dependent Claim
18 words
The method of claim 1 wherein said polyamide material is nylon, wool, silk, natural leather, or synthetic leather.
Claim 11
Dependent Claim
17 words
The method of claim 1 wherein said polyamide material is nylon 6 or nylon 66 carpet yarn.
Claim 12
Dependent Claim
12 words
A fibrous polyamide material treated according to the method of claim 1.
Claim 13
Dependent Claim
18 words
The fibrous polyamide material of claim 11 wherein said material has a stain resistance of less than 3.
Claim 14
Dependent Claim
12 words
A fibrous polyamide material treated according to the method of claim 8.
Claim 15
Dependent Claim
33 words
The fibrous polyamide material of claim 13 wherein said material has a stain resistance of less than 3, a water repellency of at least 1, and an oil repellency of at least 1.
Claim 16
Dependent Claim
21 words
A carpet comprised of nylon 6 or nylon 66 yarn, said carpet being treated according to the method of claim 1.
Claim 17
Dependent Claim
16 words
The carpet of claim 15 wherein said carpet has a stain resistance of less than 3.
Claim 18
Dependent Claim
14 words
The carpet of claim 15 wherein said carpet has a stain resistance of 1.
Claim 19
Dependent Claim
47 words
A carpet comprised of nylon 6 or nylon 66 yarn, said carpet being treated according to the method of claim 8 wherein said carpet has a stain resistance of less than e, a water repellency of at least 1, and an oil repellency of at least 1.
Claim 20
Dependent Claim
11 words
The carpet of claim 18 wherein said stain resistance is 1.
References Cited (Backward Citations)
US4325890A
Cited
EP0073606A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
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