Laundry detergents comprising modified alkylbenzene sulfonates
AssigneeThe Procter & Gamble Company
InventorsKevin Lee Kott, Jeffrey John Scheibel, Roland George Severson, Thomas Anthony Cripe, James Charles Theophile Roger Burckett-St. Laurent
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Abstract
Modified alkylbenzene sulfonate surfactant mixtures comprise a mixture of specific branched and non-branched alkylbenzene sulfonate compounds, and are further characterised by a 2/3-phenyl index of 160-275. Detergent and cleaning products containing these mixtures are also claimed.
Claims20
A modified alkylbenzene sulfonate surfactant mixture comprising:
- (a) from 15% to 99% by weight of a mixture of branched alkylbenzene sulfonates having formula (I):
- wherein L is an acyclic aliphatic moiety consisting of carbon and hydrogen, said L having two methyl termini and said L having no substituents other than A, R1 and R2;
- and wherein said mixture of branched alkylbenzene sulfonates contains two or more of said branched alkylbenzene sulfonates differing in molecular weight of the anion of said formula (I) and wherein said mixture of branched alkylbenzene sulfonates has a sum of carbon atoms in R1, L and R2 of from 9 to 15 and an average aliphatic carbon content of from 10.0 to 14.0 carbon atoms;
- M is a cation or cation mixture having a valence q;
- a and b are integers selected such that said branched alkylbenzene sulfonates are electroneutral;
- R1 is C1-C3 alkyl;
- R2 is selected from H and C1-C3 alkyl;
- A is a benzene moiety;
- and
- (b) from 1% to 85% by weight of a mixture of nonbranched alkylbenzene sulfonates having formula (II):
- wherein a, b, M, A and q are as defined hereinbefore and Y is an unsubstituted linear aliphatic moiety consisting of carbon and hydrogen having two methyl termini, and wherein said Y has a sum of carbon atoms of from 9 to 15, and said Y has an average aliphatic carbon content of from 10.0 to 14.0 carbon atoms;
- and
- wherein said modified alkylbenzene sulfonate surfactant mixture is further characterized by a 2/3-phenyl index of from 160 to 275.
A modified alkylbenzene sulfonate surfactant mixture comprising the product of a process comprising the steps of:
- (I) alkylating benzene with an alkylating mixture in the presence of a zeolite beta catalyst;
- (II) sulfonating the product of (I);
- and
- (III) neutralizing the product of (II);
- wherein said alkylating mixture comprises:
- (a) from about 1% to about 99.9%, by weight of branched C9-C20 monoolefins, said branched monoolefins having structures identical with those of the branched monoolefins formed by dehydrogenating branched paraffins of formula R1LR2 wherein L is an acyclic aliphatic moiety consisting of carbon and hydrogen and containing two terminal methyls;
- R1 is C1 to C3 alkyl;
- and R2 is selected from H and C1 to C3 alkyl;
- and
- (b) from about 0.1% to about 85%, by weight of C9-C20 linear aliphatic olefins;
- wherein said alkylating mixture contains said branched C9-C20 monoolefins having at least two different carbon numbers in said C9-C20 range, and has a mean carbon content of from about 9.0 to about 15.0 carbon atoms;
- and wherein said components (a) and (b) are at a weight ratio of at least about 15:85.
A detergent composition comprising:
- (a) from about 0.1% to about 50%, by weight of a linear alkylbenzene sulfonate surfactant mixture having a 2/3-phenyl index of from about 160 to about 275;
- (b) from about 0.1% to about 99.9% by weight of conventional cleaning adjuncts other than surfactants;
- and
- (c) from 0% to about 50%, by weight, of a surfactant other than said linear alkylbenzene sulfonate surfactant mixture;
- provided that when said detergent composition comprises any other alkylbenzene sulfonate than the alkylbenzene sulfonate of said linear alkylbenzene sulfonate surfactant mixture, said linear alkylbenzene sulfonate surfactant mixture and said other alkylbenzene sulfonate, as a mixture, have an overall 2/3-phenyl index of from about 160 to about 275.
A detergent composition comprising a modified alkylbenzene sulfonate surfactant mixture wherein said modified alkylbenzene sulfonate surfactant mixture is prepared by a process comprising a step selected from:
- (i) blending a mixture of branched and linear alkylbenzene sulfonate surfactants having a 2/3-phenyl index of 500 to 700 with an alkylbenzene sulfonate surfactant mixture having a 2/3-phenyl index of 75 to 160;
- and,
- (ii) blending a mixture of branched and linear alkylbenzenes having a 2/3-phenyl index of 500 to 700 with an alkylbenzene mixture having a 2/3-phenyl index of 75 to 160 and sulfonating said blend.
Dependencies are inferred from the claim text.