Liquid dishwashing detergent

Abstract

A liquid dishwashing detergent having improved sudsing and cleaning properties includes the combination of selected secondary alkyl sulfates with alkyl ether sulfates. The secondary alkyl sulfates selected from the group consisting of C 14 or C 16 secondary alkyl sulfates and their salts with the secondary alkyl sulfates being substantially free from other carbon length secondary alkyl sulfates.

What is claimed is: 
     
       1. A liquid dishwashing detergent composition comprising, per 100 parts by weight: a. 2 to 70 parts by weight of the combination of a secondary alkyl sulfate selected from the group consisting of C 14  or C 16  secondary alkyl sulfates and their salts with the secondary alkyl sulfates being substantially free from other carbon length secondary alkyl sulfates with an ether sulfate having the formula RO(C 2  H 4  O) x  SO 3  M wherein R is alkyl or alkenyl of about 10 to about 20 carbon atoms, x is from 1 to 30, and M is a water soluble cation;   b. 0 to 20 parts of additives; and,   c. water comprising the balance.   
     
     
       2. The dishwashing detergent composition of claim 1 wherein the ratio of secondary alkyl sulfate to ether sulfate ranges from about 1:19 to about 9:1. 
     
     
       3. The dishwashing detergent composition of claim 1 wherein the ratio of secondary alkyl sulfate to ether sulfate ranges from about 1:4 to about 4:1. 
     
     
       4. The dishwashing detergent composition of claim 1 wherein the secondary alkyl sulfate is a C 14  sodium secondary alkyl sulfate substantially free from other carbon length secondary alkyl sulfates. 
     
     
       5. The dishwashing detergent composition of claim 1 wherein the secondary alkyl sulfate is a C 16  sodium secondary alkyl sulfate substantially free from other carbon length secondary alkyl sulfates. 
     
     
       6. The dishwashing detergent composition of claim 1 wherein the ether sulfate has the formula RO(C 2  H 4  O) x  SO 3  M wherein R is alkyl or alkenyl and has from about 12 to about 15 carbon atoms x is about 3, and M is sodium. 
     
     
       7. The dishwashing detergent composition of claim 3 wherein the ratio of the secondary alkyl sulfate to the ether sulfate ranges from about 1:19 to about 9:1. 
     
     
       8. The dishwashing detergent composition of claim 4 wherein the ratio of the secondary alkyl sulfate to the ether sulfate ranges from about 1:19 to about 9:1. 
     
     
       9. The liquid dishwashing detergent of claim 1 further containing at least one surfactant selected from the group consisting of cationic, anionic, and nonionic surfactants and mixtures thereof.