Cleaning compositions containing branched alkyl sulfate surfactant with little or no alkoxylated alkyl sulfate

• US 10,647,944 B2
• Filed: 11/08/2016
• Issued: 05/12/2020
• Est. Priority Date: 11/13/2015
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Tang, Ming, Chen, Qing, Liu, Wenting
• Primary Examiner(s): Ogden, Jr., Necholus
• Application Number:
  US15/345,541
• Publication Number:
  US 20170137748A1
• Time in Patent Office: 1,281 Days
• CPC Class Codes: C11D 1/146 Sulfuric acid esters
• CPC Class Codes: C11D 1/29 Sulfates of polyoxyalkylene ethers
• CPC Class Codes: C11D 1/37 Mixtures of compounds all of which are anionic
• CPC Class Codes: C11D 1/75 Amino oxides
• CPC Class Codes: C11D 17/06 Powder; Flakes; Free-flowing mixtures; Sheets
• CPC Class Codes: C11D 2111/12 Soft surfaces, e.g. textile
• CPC Class Codes: C11D 2111/14 Hard surfaces
• CPC Class Codes: C11D 3/0094 High foaming compositions
• CPC Class Codes: C11D 3/10 Carbonates ; Bicarbonates

Abstract

Cleaning compositions with improved sudsing profiles are provided, which contain a high level of one or more branched and unethoxylated C₆-C₁₄ alkyl sulphate anionic surfactants as a primary surfactant, with little or no alkoxylated alkyl sulfate and preferably without any suds suppressors. Such cleaning compositions are particularly suitable for hand-washing dishes or fabrics.

Claims

1. A cleaning composition having a surfactant system comprising about 12% by total weight of the cleaning composition of one or more branched, unalkoxylated C₆-C₁₄ alkyl sulfate (BAS) surfactants, wherein said one or more BAS surfactants account for more than 90% by total weight of the surfactant system, and wherein said cleaning composition is free of any alkoxylated alkyl sulfate (AxS) and suds suppressors, wherein the one or more BAS surfactants comprise branched alkyl moieties with a weight average carbon atom number ranging from 11 to 13, wherein said one or more BAS surfactants are a mixture comprising:

(1) a branched, unalkoxylated C₁₂ alkyl sulfate surfactant in the amount ranging from 40% to 50%, by total weight of said mixture; and

(2) a branched, unalkoxylated C₁₃ alkyl sulfate surfactant in the amount ranging from 40% to 50%, by total weight of said mixture, wherein said surfactant system further comprises one or more linear, unalkoxylated C₆-C₂₀ alkyl sulphate surfactants (AS), wherein said one or more AS surfactants are a mixture comprising;

(1) a linear, unalkoxylated C₁₂ alkyl sulfate surfactant in the amount ranging from 70% to 80%, by total weight of said mixture; and

(2) a linear, unalkoxylated C₁₄ alkyl sulfate surfactant in the amount ranging from 20% to 30%, by total weight of said mixture wherein said one or more AS are present in an amount ranging from 1% to 5%, by total weight of the cleaning composition, wherein said cleaning composition has a sudsing profile characterized by;

a) an Initial Wash Suds Volume (by height) of no less than 30 cm;

b) a Suds Mileage (by height) of no less than 30 cm;

a Suds Retention Percentage of no less than about 60%; and

c) a Rinse Suds Reduction Rate (by height) of no less than 40%/min, which are measured according to the Sudsing Profile Test described herein, wherein the composition further comprises a carboxymethyl cellulose, an acrylic acid/maleic acid copolymer, a polyethylene glycol-Polyvinyl acetate graft polymer, a silicate, a carbonate and a sulfate.

2. The cleaning composition according to claim 1, wherein the weight ratio of said one or more BAS surfactants to said one or more AS surfactants ranges from 3:

1 to 5;

1.

3. The cleaning composition according to claim 1, wherein said detergent composition is a granular detergent composition that further comprises:

(a) from 3% to 25%, of a water-soluble alkali metal carbonate, by total weight of said granular detergent composition; and

/or (b) from 30% to 80%, of a water-soluble alkali metal sulfate, by total weight of said granular detergent composition; and

/or (c) from 30% to 80%, of a water-soluble alkali metal chloride, by total weight of said granular detergent composition.

4. A method of treating a soiled material, comprising the steps of:

a) providing a cleaning composition according to claim 1;

b) contacting the cleaning composition with at least a portion of the soiled material; and

c) rinsing the soiled material.