Heavy duty liquid detergent compositions comprising salts of .alpha.-sulfonated fatty acid methyl esters and use of .alpha.-sulphonated fatty acid salts to inhibit redeposition of soil on fabric

• US 5,945,394 A
• Filed: 07/31/1997
• Issued: 08/31/1999
• Est. Priority Date: 09/18/1995
• Status: Expired due to Term

• Current Assignee: Stepan Company
• Original Assignee: Stepan Company
• Inventors: Sajic, Branko, Malik, Arshad, Ryklin, Irma
• Primary Examiner(s): OGDEN JR, NECHOLUS
• Application Number:
  US08/836,821
• Time in Patent Office: 761 Days
• Field of Search: 510/351, 510/352, 510/357, 510/383, 510/426, 510/427, 510/428, 510/429, 510/422, 510/424, 510/425, 134/40, 560/147
• US Class Current: 510/428
• CPC Class Codes: C11D 1/146 Sulfuric acid esters
• CPC Class Codes: C11D 1/22 derived from aromatic compounds
• CPC Class Codes: C11D 1/28 Sulfonation products derived from fatty acids or their derivatives, e.g. esters, amides
• CPC Class Codes: C11D 1/29 Sulfates of polyoxyalkylene ethers
• CPC Class Codes: C11D 1/525 Carboxylic amides (R1-CO-NR2R3), where R1, R2 or R3 contain two or more hydroxy groups per alkyl group, e.g. R3 being a reducing sugar rest
• CPC Class Codes: C11D 1/662 Carbohydrates or derivatives
• CPC Class Codes: C11D 1/72 Ethers of polyoxyalkylene glycols
• CPC Class Codes: C11D 1/83 Mixtures of non-ionic with anionic compounds
• CPC Class Codes: C11D 1/86 Mixtures of anionic, cationic, and non-ionic compounds

Abstract

Disclosed are detergent compositions comprising:

(a) an α-sulfonated alkyl ester of a fatty acid having an average of about 12-14 carbon atoms;

(b) an anionic surfactant; and

(c) a nonionic surfactant, and methods for preparing such compositions.

Claims

1. A detergent composition comprising:

(a) from about 2 to 35% of an α

-sulfonated alkyl ester of a fatty acid having an average of about 12-16 carbon atoms;

(b) from about 2% to 25% by weight of a second anionic surfactant the second anionic surfactant being selected from alkyl ether sulfates, alkyl sulfates, linear alkyl benzene sulfonates, or mixtures thereof; and

(c) from about 2.0 to 40% by weight of a nonionic surfactant,

the sum of the concentrations of α

-sulfonated alkyl ester, anionic surfactant, and nonionic surfactant in a washing solution being from about 0.05% to about 3.0% by weight.

2. A detergent according to claim 1, where the alkyl ester is an alpha sulfonated methyl ester of a fatty acid having an average of about 12-16 carbon atoms.

3. A detergent composition according to claim 2, wherein the second anionic surfactant and nonionic surfactant are present in the composition at a weight ratio of from about 4:

1 to 1;

3.

4. A detergent composition according to claim 3, wherein the nonionic surfactant is a C_8-18 fatty alcohol ethoxylate, ethoxylated alkyl phenol, ethoxylated methyl ester, alkyl polyglycoside or alkyl n-methyl glucamides.

5. A detergent composition according to claim 4, wherein the alkyl ester is present in the composition in an amount of from about 2-20% by weight of the composition.

6. A detergent composition according to claim 5, wherein the nonionic surfactant is present in an amount from about 8 to 20% by weight of the composition.

7. A detergent according to claim 1, where the composition is a liquid having a viscosity of from about 150-1000 cps at 25°

C.

8. A detergent composition according to claim 1, where the alkyl ester is present in the formulation at a concentration of about 5-20% by weight.