Chemical system for providing fibrous materials with stain resistance
AssigneeMinnesota Mining and Manufacturing Company
InventorVan G. Nguyen
Life of this patent
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Abstract
Method for imparting stain resistance to fibers, especially wool, which is adaptable to current wool processing methods. Steps comprise: A. treating fibers with a mordant; B. treatment with a combination of sulfonated or disulphonated surfactant together with a stain resist (e.g., syntan); and C. providing treatment with a fluorochemical in either step A. or B. in an amount sufficient to improve stain resistant properties. The improved method may be undertaken in the liquor remaining in a dye bath after dyeing fiber (spent bath process). Process pH is acid. Advantage: lowers the proportion of stain resist chemical to wool necessary to impart stain resistance. Tip sealing, using polymethacrylic resin and fluorochemical, may be an added step.
Claims17
A method for imparting to synthetic or keratinous fibrous material stain resistance to common household stains, said method comprising the steps of:
- A. contacting said material with a mordant selected from the group consisting of aluminum sulfate, aluminum hydroxide and zirconium salts in an amount effective to impart to the fiber greater stain resistance than would be obtained absent the mordant;
- B. contacting the material from step A. with an aqueous bath containing a at least one surfactant, selected from sulphonated and disulphonated surfactants, in an amount effective to allow diffusion of a stain resist chemical into the fibrous material, and stain resist chemical in an amount sufficient to substantially decrease adsorption of staining material by the fiber, said stain resist chemical being selected from the group consisting of sulfonated phenolic resins, naphthalene sulfonic acid, naphthalene sulphones and derivatives thereof, the pH of the bath being at 1.5 to 3.0;
- and
- provided that a fluorochemical is present, in either step A. or B. in an amount sufficient to provide improved stain resist properties to the fibrous material when compared to such material which has not been treated with the fluorochemical in combination with the other components recited above.
A method for imparting to synthetic or keratinous fibrous material stain resistance to common household stains, said method comprising the steps of:
- A. applying to said material with a mordant which is trivalent or tetravalent and is selected from the group consisting of aluminum sulfate, aluminum hydroxide or a zirconium salt selected from zirconium sulfate or zirconium hydroxides and the proportion of mordant used is 0.5 to 2 weight percent, based upon the weight of fibrous material being 100 percent;
- B. contacting the material from step A. in an aqueous bath having a pH of 1.5 to 3.0 containing at least one surfactant selected from sulphonated and disulphonated surfactants, the proportion of surfactant to fibrous material being in the range of 0.5 to 1.5 percent based on the fibrous material being 100 percent, and in an amount sufficient to substantially decrease adsorption of staining material by the fiber, said stain resist chemical phenolic resins, naphthalene sulfonic acid, naphthalene sulphones and derivatives thereof,
- provided that a fluorochemical is present, in either step A or B in an amount sufficient to provide improved stain resist properties to the fibrous material when compared to such material which has not been treated with the fluorochemical in combination with the other components recited above.
A method for imparting to keratinous material, stain resistance to common household stains, said method comprising the step of:
- A. preparing said keratinous material in tufted form;
- B. conveying said tufted keratinous material through a prewetting station and adding a first surfactant thereto, said first surfactant being selected from the group consisting of dioctyl sulphosuccinate and mixtures of sodium xylene sulfonate or derivatives thereof and dodecylbenzenesulfonic acid or derivatives thereof;
- C. adding a mordant, selected from the group consisting of aluminum sulfate, aluminum hydroxide, zirconium sulfate and zirconium hydroxide, to the prewet keratinous material from step B. in an amount effective to impart to the fiber greater stain resistance than would be obtained absent the mordant;
- D. contacting the keratinous material with an aqueous mixture of a further surfactant together with a divalent salt, an anionic fluorochemical, and a stain resist chemical in an amount sufficient to substantially decrease adsorption of staining acid colorants found in foods and beverages by the fiber, which mixture has a pH of 1.5-3.0,
- said further surfactant being selected from selected from the group consisting of alkyl aryl sulphonated fatty amines;
- hydroxyethylated fatty amines:
- sodium alkyl diphenyl ether disulphonate;
- sodium dodecyl diphenyl oxide disulphonate;
- dodecyl (Sulfophenoxy) benzene sulphonic acid, disodium salt:
- oxybis (dodecylbenzene sulphonic acid) disodium salt;
- hydrotrope sodium xylene sulfonate;
- aryl sulphonates;
- fatty amine polyglycol ether (sulphonate ethylene oxide condensate);
- sodium salt of sulphonated oil/ethylene oxide condensatei dodecyl (sulphophenoxy) benzene sulfonic acid, disodium salt, oxybis (dodecylbenzene sulphonic acid) disodium salts containing at least 1 percent sodium sulfate and at least 3 percent sodium chloride;
- groups of alkylated diphenyl oxide disulphonates;
- and benzene sulphonic acid, dodecyl (sulphophenoxy) disodium salt, monosodium and didodecyl disulphonated diphenyl oxide, said stain resist chemical being selected from the group consisting of sulfonated phenolic resins, naphthalene sulfonic acids naphthalene sulphones and derivatives thereof.
Dependencies are inferred from the claim text.