Process of reducing malodors on fabrics

Patent metadata

Field	Value
Publication number	US-11802259-B2
Application number	US-202017086488-A
Country	US
Kind code	B2
Filing date	Nov 2, 2020
Priority date	Nov 8, 2019
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

A process of reducing malodors on fabrics includes combining fabrics having at least one source of malodor with a wash liquor having metal ions. The wash liquor is prepared by diluting a laundry detergent composition in water by a factor of between 100-fold and 3000-fold. The process further includes washing the fabrics in the wash liquor using an automatic wash operation, a manual wash operation or a mixture thereof; separating the fabrics and the wash liquor from one another; and drying the fabrics. The laundry detergent composition includes from 0.001% to 5% of an alkylated phenol antioxidant, a hindered phenol antioxidant, or mixtures thereof, and at least one of said antioxidants has a log D value at pH 7 equal to or greater than 1.50.

First claim

What is claimed is:

1. A process of reducing malodors on fabrics, comprising:
combining fabrics with a wash liquor;
washing the fabrics in the wash liquor using an automatic wash operation, a manual wash operation or a mixture thereof;
separating the fabrics and the wash liquor from one another; and
drying the fabrics, wherein:
the fabrics comprise at least one source of malodor,
the wash liquor comprises from 200 to 800 ppb Cu 2+ ,
the wash liquor is prepared by diluting a laundry detergent composition in water by a factor of between 100-fold and 3000-fold,
the laundry detergent composition comprises from 0.025% to 5% by weight of the laundry detergent composition of C 1 -C 18 linear or branched alkyl esters of 3,5-bis(1,1-dimethylethyl)-4-hydroxy-benzenepropanoic acid antioxidant, and
wherein said antioxidant has a log D value at pH 7 equal to or greater than 1.50.

2. The process according to claim 1 , wherein the laundry detergent composition is diluted in water by a factor of between 300-fold and 900-fold.

3. The process according to claim 1 , wherein the laundry detergent composition comprises from 0.025% to 1.5% by weight of the laundry detergent composition of the C 1 -C 18 linear or branched alkyl esters of 3,5-bis(1,1-dimethylethyl)-4-hydroxy-benzenepropanoic acid.

4. The process according to claim 1 , wherein said antioxidant has a log D value at pH 7 equal to or greater than 3.50.

5. The process according to claim 1 , wherein the metal ion Cu 2+ is introduced to the wash liquor by being present on the fabric prior to contacting with the wash liquor, being present in the water used to make the wash liquor, or a mixture thereof.

6. The process according to claim 1 ,
a. wherein the fabrics are washed in the wash liquor at a temperature of between 10° C. and 35° C.;
b. wherein the automatic wash operation takes between 5 minutes and 30 minutes;
c. or a mixture thereof.

7. The process according to claim 1 , wherein the wash liquor comprises from 0.1 ppm to 100 ppm of the C 1 -C 18 linear or branched alkyl esters of 3,5-bis(1,1-dimethylethyl)-4-hydroxy-benzenepropanoic acid.

8. The process according to claim 1 , wherein the laundry detergent composition comprises a non-soap surfactant, wherein the non-soap surfactant is selected from the group consisting of a non-soap anionic surfactant, non-ionic surfactant, amphoteric surfactant, cationic surfactant, or a mixture thereof, wherein the laundry detergent composition comprises between 20% and 55% by weight of the laundry detergent composition of the non-soap surfactant.

9. The process according to claim 8 , wherein the non-soap anionic surfactant comprises a mixture of a linear alkylbenzene sulphonate and an alkoxylated alkyl sulphate, wherein the weight ratio of linear alkylbenzene sulphonate to ethoxylated alkyl sulphate is from 1.4:1 to 3:1, wherein the laundry detergent composition comprises between 30% and 40% by weight of the detergent composition of the non-soap anionic surfactant.

10. The process according to claim 1 , wherein the laundry detergent composition comprises between 0.15% and 4% by weight of the laundry detergent composition of a non-ionic surfactant, wherein the non-ionic surfactant is selected from the group consisting of an alcohol alkoxylate, an oxo-synthesised alcohol alkoxylate, Guerbet alcohol alkoxylates, alkyl phenol alcohol alkoxylates and mixtures thereof.

11. The process according to claim 1 , wherein the laundry detergent composition comprises between 4% and 8% by weight of the laundry detergent composition of an amine neutralized fatty acid salt, wherein the amine is a monoethanolamine.

12. The process according to claim 1 , wherein the laundry detergent comprises an additional ingredient selected from the group consisting of cationic polymers, polyester terephthalates, amphiphilic graft co-polymers, carboxymethylcellulose, enzymes, perfumes, encapsulated perfumes, bleach and mixtures thereof.

13. The process according to claim 1 , wherein the laundry detergent composition further comprises a chelant, wherein the chelant is selected from the group consisting of phosphonates, aminocarboxylates, amino phosphonates, polyfunctionally-substituted aromatic chelating agents, and mixtures thereof.

14. The process according to claim 1 , wherein the laundry detergent composition further comprises a hueing dye.

15. The process according to claim 1 , wherein the C 1 -C 18 linear or branched alkyl esters of 3,5-bis(1,1-dimethylethyl)-4-hydroxy-benzenepropanoic acid has a log D value at pH 7 equal to or greater than 2.50.

Assignees

• Procter & Gamble

Inventors

• Miracle Gregory Scot
• Stenger Patrick Christopher
• Meli Fabrizio
• Bianchetti Giulia Ottavia

Classifications

• C11D3/0084 Primary

  Antioxidants; Free-radical scavengers · CPC title

• C11D1/831

  of sulfonates with ethers of polyoxyalkylenes without phosphates · CPC title

• C11D3/0068

  Deodorant compositions · CPC title

• C11D3/046

  Salts · CPC title

• C11D3/2093

  Esters; Carbonates · CPC title