Laundry detergent with polyamine mono-anionic surfactant

1. A laundry detergent composition comprising:

(a) from about 0.1% to about 80%, by weight of the composition, of a polyamine mono-anionic surfactant having the structure formula:

where R is selected from hydrogen, linear or branched C 1 -C 4 alkyl, C 7 -C 12 Alkylaryl, C 2 -C 12 alkylene, C 3 -C 12 hydroxyalkylene, C 4 -C 12 dihydroxyalkylene, C 8 -C 12 dialkylarylene, and

where μ and ν are in the range of 0 to 4 and the sum of μ and ν are between 1 and 4; R 1 is selected from hydrogen, linear or branched C 1 -C 4 alkyl, C 6 -C 12 alkylaryl, C 2 -C 12 alkylene, C 3 -C 12 hydroxyalkylene, C 4 -C 12 dihydroxyalkylene, C 8 -C 12 dialkylarylene;

R2 is selected from R1 and amine oxide;

R′ is selected from C 2 -C 12 alkylene, C 4 -C 12 alkenylene, C 3 -C 12 hydroxyalkylene wherein the hydroxyl moiety may take any position on the R′ unit chain except the carbon atoms directly connected to the backbone nitrogen; C 4 -C 12 dihydroxyalkylene wherein the hydroxyl moieties may occupy any two of the carbon atoms of the R′ unit chain except those carbon atoms directly connected to the backbone nitrogen;

the values of α, β, and γ are between 0 to 10 and the sum of α and β is greater than or equal to 1;

S − is: R 3 −L 31

where R 3 is selected from straight or branched C 6 -C 22 alkyl, C 6 -C 22 alkylene, C 6 -C 22 polyoxyalkylenalkyl, C 6 -C 22 polyoxyalkylenacyl, C 6 -C 22 alkylaryl, rosin derivatives, C 6 -C 22 N-acylalkyl; C 6 -C 22 α-sulfonatedtoalkyl, C 6 -C 22 hydroxyalkyl, and C 6 -C 22 hydoxyalkylene;

where L − is selected from COO − , SO 3 − , OSO3 − , phosphoric acid, phosphorous acid amino acids, aromatic carboxylic acid, sugar base acids derived from oxidation of monosaccharides and polysaccharides;

(b) from about 0.05% to about 2%, of a solubilizer selected from the group consisting of anionic, non-ionic, and amphoteric surfactants having an HLB greater than about 10;

(c) wherein the weight ratio of anionic conjugated acid of the polyamine mono-anionic surfactant to the solubilizer, WR, is equal to or greater than R, which is defined by the equation 1:

R= 0.22 N 2 −2.23 N+ 6.07   (1)

where N is greater than or equal to 2 and is the number of amine groups in polyamine.

2. The composition of claim 1 wherein the polyamine mono-anionic surfactant is selected from the group consisting of polyamine alkyl benzene sulfonate, polyamine alkyl sulfate, polyamine fatty acid salt, polyamine alkyl polyalkoxy sulfate, and mixtures thereof.

3. A method of improving soil removal from soiled garments, the method comprising adding into a laundry washing machine the composition of claim 1 .

4. The composition of claim 1 wherein the minimum amount of solubiliser, WS, is equal to or greater than S defined in Equation 2:

S =(0.06 N − 0.12) W   (2)

where N is greater than or equal to 2 and is the number of amine groups in polyamine and W is the weight of the polyamine mono-anionic surfactant.

5. The composition of claim 1 wherein the HLB value of the solubiliser is greater than about 13.

6. A process of making a liquid laundry detergent composition comprising a polyamine mono-anionic surfactant, having the structure formula:

where R is selected from hydrogen, linear or branched C 1 -C 4 alkyl, C 7 -C 12 alkylaryl, C 2 -C 12 alkylene, C 3 -C 12 hydroxyalkylene, C 4 -C 12 dihydroxyalkylene, C 8 -C 12 dialkylarylene, and

where μ and ν are in the range of 0 to 4 and the sum of μ and ν are between 1and4, R 1 is selected from hydrogen, linear or branched C 1 -C 4 alkyl, C 6 -C 12 alkylaryl, C 2 -C 12 alkylene, C 3 -C 12 hydroxyalkylene, C 4 -C 12 dihydroxyalkylene, C 8 -C 12 dialkylarylene;

R2 is selected from R1 and amine oxide;

R′ is selected from C 2 -C 12 alkylene, C 4 -C 12 alkenylene, C 3 -C 12 hydroxyalkylene wherein the hydroxyl moiety may take any position on the R′ unit chain except the carbon atoms directly connected to the backbone nitrogen; C 4 -C 12 dihydroxyalkylene wherein the hydroxyl moieties may occupy any two of the carbon atoms of the R′ unit chain except those carbon atoms directly connected to the backbone nitrogen;

the values of α, β, and γ are between 0 to 10 and the sum of α and β is greater than or equal to 1;

S − is: R 3 −L −

where R 3 is selected from straight or branched C 6 -C 22 alkyl, C 6 -C 22 alkylene, C 6 -C 22 polyoxyalkylenalkyl, C 6 -C 22 polyoxyalkylenacyl, C 6 -C 22 alkylaryl, rosin derivatives, C 6 -C 22 N-acylalkyl; C 6 -C 22 α-sulfonatedtoalkyl, C 6 -C 22 hydroxyalkyl, and C 6 -C 22 hydoxyalkylene;

where L − is selected from COO − , SO 3 − , OSO3 − , phosphoric acid phosphorous acid,. amino acids, aromatic carboxylic acid, sugar base acids derived from oxidation of monosaccharides and polysaccharides;

the process comprising forming the polyamine mono-anionic surfactant by mixing a liquid carrier with:

(1) from about 0.03% to about 85%, by weight of the composition, of a conjugate acid of an anionic surfactant; and

(2) a polyamine in the amount about equal to or greater than 1:1 stoichiometric amount of the conjugate acid,

(3) wherein the amount of bases other than polyamine is equal to or less than 1:1 stoichiometric amount of the conjugate acids that form builder salts and/or anionic surfactants excluding polyamine mono-anionic surfactant.

7. A process of preparing detergent granules comprising a polyamine mono-anionic surfactant, the process comprising the steps of:

(a) charging solid detergent ingredients into a granulator,

(b) adding before or during the granulation a substantially non-aqueous binder comprising:

(1) from about 5% to about 80%, by weight of the binder, of the polyamine mono-anionic surfactant having the structure formula:

where R is selected from hydrogen, linear or branched C 1 -C 4 alkyl, C 7 -C 12 alkylaryl, C 2 -C 12 alkylene, C 3 -C 12 hydroxyalkylene, C 4 -C 12 dihydroxyalkylene, C 8 -C 12 dialkylarylene, and

where μ and ν are in the range of 0 to 4 and the sum of μ and ν are between 1and 4, R 1 is selected from hydrogen, linear or branched C 1 -C 4 alkyl, C 6 -C 12 alkylaryl, C 2 -C 12 alkylene, C 3 -C 12 hydroxyalkylene, C 4 -C 12 dihydroxyalkylene, C 8 -C 12 dialkylarylene;

R2 is selected from R1 and amine oxide;

R′ is selected from C 2 -C 12 alkylene, C 4 -C 12 alkenylene, C 3 -C 12 hydroxyalkylene wherein the hydroxyl moiety may take any position on the R′ unit chain except the carbon atoms directly connected to the backbone nitrogen; C 4 -C 12 dihydroxyalkylene wherein the hydroxyl moieties may occupy any two of the carbon atoms of the R′ unit chain except those carbon atoms directly connected to the backbone nitrogen;

the values of α, β, and γ are between 0 to 10 and the sum of α and β is greater than or equal to 1;

S − is: R 3 −L −

where R 3 is selected from straight or branched C 6 -C 22 alkyl, C 6 -C 22 alkylene, C 6 -C 22 polyoxyalkylenalkyl, C 6 -C 22 polyoxyalkylenacyl, C 6 -C 22 alkylaryl, rosin derivatives, C 6 -C 22 N-acylalkyl; C 6 -C 22 α-sulfonatedtoalkyl, C 6 -C 22 hydroxyalkyl, and C 6 -C 22 hydoxyalkylene;

where L − is selected from COO − , SO 3 − , OSO3 − , phosphoric acid phosphorous acid,. amino acids, aromatic carboxylic acid, sugar base acids derived from oxidation of monosaccharides and polysaccharides;

(2) from about 95% to about 20%, by weight of the binder, of a substantially non-aqueous solubilizer for the polyame mono-anionic surfactant;

(3) optionally, from about 0% to about 20%, by weight of the binder, of a water-dissolvable/water dispersible liquifiable binder, to form the polyamine mono-anionic surfactant granules,

(4) optionally, adding a layering agent and/or post-dosing other minor ingredients.