Diols and polymeric glycols for improved dishwashing detergent compositions
AssigneeThe Procter & Gamble Company
InventorsJoanna Margaret Clarke, Garry Kenneth Embleton, Howard David Hutton, Mark Leslie Kacher, John David Sadler, Deborah Pancheri Wallace
Life of this patent
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Abstract
Disclosed are detergent compositions for hand dishwashing which, by incorporating certain organic solvents, results in a liquid dishwashing detergent composition that is not only a more effective cleaning agent, but also offers improved physical and enzymatic stability and more convenient rheology and handling characteristics than typical liquid dishwashing compositions.
Claims20
A liquid dishwashing detergent composition suitable for use in hand dishwashing, said composition comprising:
- (a) a low molecular weight organic diamine having a pK1 and a pK2, wherein the pK1 and the pK2 of said diamine are both in the range of from 8.0 to 11.5;
- (b) an anionic surfactant;
- (c) an amphoteric surfactant,
- (d) an enzyme selected from the group consisting of cellulases, hemicellulases, peroxidases, proteases, gluco-amylases, lipases, cutinases, pectinases, xylanases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, pullulanases, tannases, pentosanases, malanases, β-glucanases, arabinosidases, and mixtures thereof;
- and
- (e) a solvent selected from the group consisting of a diol, a polymeric glycol, and mixtures thereof, wherein said diol is represented by the formula:
- 15
- wherein n=0-3, R7=H, methyl or ethyl;
- and R8=H, methyl, ethyl, propyl, isopropyl, butyl and isobutyl;
- and wherein the polymeric glycol is represented by the formula:
- 16
- wherein PO represents a propylene oxide group and EO represents an ethylene oxide group and x+y is from 17 to 68, and x/(x+y) is from 0.25 to 1.0;
- wherein the pH (as measured as 10% aqueous solution) is from 5.0 to 12.5;
- and wherein the mole ratio of said anionic surfactant to said amphoteric surfactant to said diamine is from 100:40:1 to 9:0.5:1.
A liquid dishwashing detergent composition suitable for use in hand dishwashing, said composition comprising:
- (a) from 0.1% to about 5% by weight of a low molecular weight organic diamine having a molecular weight of less than or equal to 400 g/mol and a pK1 and a pK2, wherein the pK1 and pK2 of said diamine are both in the range of from 8.0 to 11.5;
- (b) from about 5% to about 50% by weight of an anionic surfactant;
- (c) from about 0.1% to about 20% by weight of an amphoteric surfactant;
- (d) from about 0.0001% to about 5% of active enzyme by weight, wherein said enzyme is selected from the group consisting of cellulases, hemicellulases, peroxidases, proteases, gluco-amylases, lipases, cutinases, pectinases, xylanases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, pullulanases, tannases, pentosanases, malanases, β-glucanases, arabinosidases, and mixtures thereof;
- and
- (e) from about 0.50% to about 25.0% by weight of a polypropylene glycol solvent,
- wherein the pH as measured as a 10% aqueous solution is from about 5.0 to about 12.5, and the mole ratio of said anionic surfactant to said amphoteric surfactant to said diamine is from about 100:40:1 to about 9:0.5:1.
Dependencies are inferred from the claim text.