EP0332342A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for providing polyamide materials with stain resistance
Assignee: 3M Co
•
Filing: 1989-03-02
•
Granted: —
•
Expires: 2009-03-02
Abstract
Abstract A method for imparting to fibrous polyamide materials stain resistance to acid colorants is provided. The method comprises contacting the fibrous polyamide materials with an aqueous treating solution comprising polymethacrylic acid, copolymers of methacrylic acid, or combinations thereof, and drying said substrate, said polymethacrylic acid, copolymers of methacrylic acid, or combinations thereof being provided in a sufficient amount and having a solubility and molecular weight such that said fibrous polyamide substrate has an improved acid colorant stain resistance.
Inventors
- 👤 John C. Chang
- 👤 Maynard H. Olson
- 👤 Imelda A. Muggli
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 16:19
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M15/00; D06M15/19; D06M15/21; D06M15/263
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A method for imparting to fibrous polyamide materials stain resistance to acid colorants comprising contacting the fibrous polyamide materials with an aqueous treating solution comprising polymethacrylic acid, copolymers of methacrylic acid, or combinations thereof, and drying said substrate, said polymethacrylic acid, copolymers of methacrylic acid, or combinations thereof being provided in a sufficient amount and having a solubility and molecular weight such that said fibrous polyamide substrate has an improved acid colorant stain resistance.
Claim 2
Independent Claim
74 words
A method for imparting to fibrous polyamide materials stain resistance to acid colorants comprising contacting the fibrous polyamide materials with an aqueous treating solution comprising polymethacrylic acid, copolymers of methacrylic acid, or combinations thereof, and drying said substrate, said polymethacrylic acid, copolymers of methacrylic acid, or combinations thereof being provided in a sufficient amount and having a solubility and molecular weight such that said fibrous polyamide substrate has an improved acid colorant stain resistance.
Claim 3
Independent Claim
85 words
The method of claim l wherein copolymer is a copolymer of methacrylic acid and a comonomer which is a monocarboxylic acid, a polycarboxylic acid, an anhydride, a substituted or unsubstituted ester or amide of a carboxylic acid or anhydride, a nitrile, a vinyl monomer, a vinylidene monomer, a monoolefinic or polyolefinic monomer, a heterocyclic monomer, or combinations thereof or a terpolymer of methacrylic acid, sodium sulfostyrene, and styrene; methacrylic acid, sulfated castor oil, and acrylic acid; and methacrylic acid, ethyl acrylate, and sulfated castor oil.
Claim 4
Dependent Claim
24 words
The method of claim 3 wherein said comonomer is alkyl acrylate having 1-4 alkyl carbon atoms, itaconic acid, sodium sulfostyrene, or sulfated castor oil.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein methacrylic acid comprises about 30 to 100 weight percent of said copolymer of methacrylic acid.
Claim 6
Dependent Claim
35 words
The method of claim 1 wherein the lower 90 weight percent of said polymethacrylic acid and said copolymers of methacrylic acid have a weight average molecular weight in the range of about 2500 to 250,000.
Claim 7
Dependent Claim
43 words
The method of claim 1 wherein said substrate is nylon 66 fiber and said polymethacrylic acid and/or said copolymers of methacrylic acid are present in an amount of at least about 0.1 weight percent based on the weight of the polyamide fibrous substrate.
Claim 8
Dependent Claim
11 words
Fibrous polyamide substrates prepared according to the method of claim 1.
Claim 9
Dependent Claim
62 words
An aqueous solution useful in the method of claim 1 comprising polymethacrylic acid, copolymers of methacrylic acid, or combinations thereof, said polymethacrylic acid, copolymers of methacrylic acid, or combinations thereof being provided in a sufficient amount and having a solubility and molecular weight such that said solution is capable of providing said fibrous polyamide substrate with an improved acid colorant stain resistance.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.