Detergent compositions for effective oily soil removal

Claim 1

An oily soil dissolving agent for removing oily soil from fabrics in an aqueous washing medium consisting essentially of: (a) from about 20% to about 97% by weight of a water-insoluble solvent selected from the group consisting of: (i) alkanes and alkenes having a flash point not lower than about 65° C. (Tag closed cup), an initial boiling point not lower than about 130° C., a solidification point not above about 20° C. and a carbon chain length from about 10 to about 18; and (ii) fatty acid esters of the formula ##STR3## in which R 1 is an alkyl group with from about 7 to about 17 carbon atoms and R 2 is an alkyl group with from 1 to about 10 carbon atoms, the sum of carbon atoms in R 1 and R 2 being from about 8 to about 23; (b) from about 3% to about 30% by weight of a water-in-oil emulsifier soluble in said solvent, said emulsifier having an HLB value of from about 2 to about 12 and consisting essentially of from about 25% to 100% of emulsifier compounds with at least two alkyl groups each having from about 9 to about 20 carbon atoms and selected from the group consisting of: (i) dialkyl sulfosuccinic acid and alkali metal, alkaline earth metal, ammonium, and mono-, di-, and tri- C 1-4 alkyl and alkanol ammonium salts of dialkyl sulfosuccinic acid, said alkyl groups each containing from about 9 to about 20 carbon atoms; (ii) quaternary ammonium compounds with more than one long chain alkyl group selected from the group consisting of di- C 9-20 alkyl ammonium chloride, bromide, methyl sulfate, nitrate and acetate and di- C 9-20 alkyl imadazolinium quaternary ammonium compounds; (iii) alkyl or alkyl ethoxy diesters of phosphoric acid having the formula ##STR4## in which both R 1 and R 2 are alkyl groups containing from about 9 to about 20 carbon atoms, n and m are from zero to about 8 and M is hydrogen or a salt forming cation, and (iv) mixtures thereof; (c) from 0% to about 77% water; and (d) from 0% to about 77% detergency builders selected from the group consisting of water soluble orthophosphates, polyphosphates, phosphonates, carbonates, bicarbonates, polyhydroxysulfonates, silicates, carboxylates and polycarboxylates, water-insoluble aluminosilicates and mixtures thereof.

Claim 10

A method of removing oily soil from fabrics comprising: (1) contacting said fabrics with an aqueous washing medium consisting essentially of: (a) from about 0.1% to about 3% by weight of a water-insoluble solvent selected from the group consisting of: (i) alkanes and alkenes having a flash point not lower than about 65° C. (Tag closed cup), an initial boiling point not lower than about 130° C., a solidification point not above about 20° C. and a carbon chain length from about 10 to about 18; and (ii) fatty acid esters of the formula ##STR7## in which R 1 is an alkyl group with from about 7 to about 17 carbon atoms and R 2 is an alkyl group with from 1 to about 10 carbon atoms, the sum of carbon atoms in R 1 and R 2 being from about 8 to about 23; (b) from about 3% to about 30% by weight of a water-in-oil emulsifier soluble in said solvent, said emulsifier having an HLB value of from about 2 to about 12 and consisting essentially of from about 25% to 100% of emulsifier compounds with at least two alkyl groups each having from about 9 to about 20 carbon atoms and selected from the group consisting of: (i) dialkyl sulfosuccinic acid and alkali metal, alkaline earth metal, ammonium, and mono-, di-, and tri- C 1-4 alkyl and alkanol ammonium salts of dialkyl sulfosuccinic acid, said alkyl groups each containing from about 9 to about 20 carbon atoms; (ii) quaternary ammonium compounds with more than one long chain alkyl group selected from the group consisting of di- C 9-20 alkyl ammonium chloride, bromide, methyl sulfate, nitrate and acetate and di- C 9-20 alkyl imadazolinium quaternary ammonium compounds; (iii) alkyl or alkyl ethoxy diesters of phosphoric acid having the formula ##STR8## in which Both R 1 and R 2 are alkyl groups containing from about 9 to about 20 carbon atoms, n and m are from zero to about 8 and M is hydrogen or a salt forming cation, and (iv) mixtures thereof; and (c) from about 90% to about 99.6% water; and (2) allowing said fabrics to remain in contact with said washing medium for at least 30 seconds.

Claim 11

A method of removing oily soil from fabrics comprising: (1) contacting said fabrics with an aqueous washing medium consisting essentially of: (a) from about 0.1% to about 3% by weight of a water-insoluble solvent selected from the group consisting of: (i) alkanes and alkenes having a flash point not lower than about 65° C. (Tag closed cup), an initial boiling point not lower than about 130° C., a solidification point not above about 20° C. and a carbon chain length from about 10 to about 18; and (ii) fatty acid esters of the formula ##STR7## in which R 1 is an alkyl group with from about 7 to about 17 carbon atoms and R 2 is an alkyl group with from 1 to about 10 carbon atoms, the sum of carbon atoms in R 1 and R 2 being from about 8 to about 23; (b) from about 3% to about 30% by weight of a water-in-oil emulsifier soluble in said solvent, said emulsifier having an HLB value of from about 2 to about 12 and consisting essentially of from about 25% to 100% of emulsifier compounds with at least two alkyl groups each having from about 9 to about 20 carbon atoms and selected from the group consisting of: (i) dialkyl sulfosuccinic acid and alkali metal, alkaline earth metal, ammonium, and mono-, di-, and tri- C 1-4 alkyl and alkanol ammonium salts of dialkyl sulfosuccinic acid, said alkyl groups each containing from about 9 to about 20 carbon atoms; (ii) quaternary ammonium compounds with more than one long chain alkyl group selected from the group consisting of di- C 9-20 alkyl ammonium chloride, bromide, methyl sulfate, nitrate and acetate and di- C 9-20 alkyl imadazolinium quaternary ammonium compounds; (iii) alkyl or alkyl ethoxy diesters of phosphoric acid having the formula ##STR8## in which Both R 1 and R 2 are alkyl groups containing from about 9 to about 20 carbon atoms, n and m are from zero to about 8 and M is hydrogen or a salt forming cation, and (iv) mixtures thereof; and (c) from about 90% to about 99.6% water; and (2) allowing said fabrics to remain in contact with said washing medium for at least 30 seconds.