Patent ID: 6306817
Filing Date: 2001-10-23
Classification: C11D

Abstract:
A surfactant composition comprising:alkylarylsulfonate surfactant system comprising at least two isomers of the alkylarylsulfonate surfactant of the formula: ##STR21##wherein:L is an acyclic aliphatic hydrocarbyl of from 6 to 18 carbon atoms in total;M is a cation or cation mixture and q is the valence thereof;a and b are numbers selected such that said composition is electroneutral;R' is selected from H and C.sub.1 to C.sub.3 alkyl;R' is selected from H and C.sub.1 to C.sub.3 alkyl;R""' is selected from H and C.sub.1 to C.sub.3 alkyl;both R' and R"" are nonterminally attached to L and at least one of R' and R"" is C.sub.1 to C.sub.3 alkyl; andA is aryl; andwherein:said alkylarylsulfonate surfactant system comprises two or more isomers with respect to positions of attachment of R', R"" and A to L;in at least about 60% of said alkylarylsulfonate surfactant system, A is attached to L in the position which is selected from positions alpha- and beta- to either of the two terminal carbon atoms thereof; andwherein further said alkylarylsulfonate surfactant system has at least one of the following properties:said alkylarylsulfonate surfactant system has a ratio of nonquatemary to quaternary carbon atoms in L of at least about 10:1 by weight, when said quaternary carbon atoms are present; andthere is no more than 40% by weight loss as measured by Hardness Tolerance Test.