Patent ID: 7534760

Claim:
A method for improving the solubility of a surface active nonionic alkylene oxide adduct in a highly alkaline composition having a pH above 11, said adduct containing a hydrocarbon group or an acyl group of from 8 to 24 carbon atoms and at least one primary hydroxyl group in the alkoxylated part of the molecule, said method comprising adding a hydrotrope to said highly alkaline composition, said hydrotrope comprising a hexyl glycoside having the formula C 5 H 13 OG n (I), where G is a monosaccharide residue and n is from 1 to 5, wherein the weight ratio between said hexyl glycoside and said surface active nonionic alkylene oxide adduct is from 1:10 to 4:1, and wherein said composition comprises 3-50% of an alkaline complexing agent as an alkaline agent.