Sarcosinate shampoo

Abstract

Abstract A homogeneous aqueous shampoo composition comprises by weight (a) 6-15% of an N-acyl sarcosinate, (b) 2-8% of either an alkyl sulphate or an alkyl ethenoxy ether sulphate containing 1-5 ethylene oxide units per molecule, (c) 3-8% of a mixture of acyl mono- and di-ethanolamides in a weight ratio of 2:1 to 1:2, and (d) 3-12% of ethanol, glycerol, or propylene glycol, the weight ratio of (a) to (b) being 3:2 to 3:1 and the pH of the solution being 6-7.5. The composition generally also contains (e) 0.3-2% of an amino polycarboxylate sequestrant such as a hydroxyethyl ethylenediamine triacetate, a nitrilotriacetate, a 2-hydroxyethylimino diacetate, a diethylene triamine pentacetate, a 1:2-diamino-cyclohexane tetracetate or, most suitably, an ethylene diamine tetracetate; the cations present in components (a), (b) and (e) are sodium, potassium, ammonium or triethanolammonium. The acyl and alkyl groups present in components (a), (b) and (c) contain 10-18 carbon atoms and in at least 45% of the groups in each case 12 carbon atoms; preferably these acyl and alkyl groups substantially all contain only 12 carbon atoms. The composition may also include up to 0.5% of colouring, up to 2% methyl cellulose or sodium carboxymethylcellulose, up to 1% perfume, up to 0.5% ammonium or sodium sulphite (colour stabilizer), up to 0.01% phenyl mercuric acetate (preservative), up to 5% ethylene glycol distearate (opacifier) and up to 0.2% of an ultraviolet absorbent or antioxidant. The pH of the composition may be adjusted with citric acid or triethanolamine.

Inventors

• 👤 John A Anderson

Bibliographic Details