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US 11,142,729 B2Granted
Detergents for cold-water cleaning
AssigneeStepan Company
InventorsBrian Holland, Randal J. Bernhardt, Branko Sajic, Rick Tabor
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AssigneeStepan Company
InventorsBrian Holland, Randal J. Bernhardt, Branko Sajic, Rick Tabor
Estimating the term…
Detergents useful for cold-water cleaning and mid-chain headgroup and alkylene-bridged surfactants useful therein are disclosed. The mid-chain headgroup surfactant has a C14-C30 alkyl chain and a polar group bonded to a central zone carbon of the alkyl chain. The alkylene-bridged surfactant has a C12-C18 alkyl chain, a polar group, and a C1-C2 alkylene group bonded to the polar group and a central zone carbon of the C12-C18 alkyl chain. Preferred surfactants in these classes are alcohol sulfates, alcohol ethoxylates, ether sulfates, sulfonates, arylsulfonates, alcohol phosphates, amine oxides, quaterniums, betaines, and sulfobetaines. Surprisingly, detergents formulated with the surfactants provide outstanding cold-water performance in removing greasy stains such as bacon grease, butter, cooked beef fat, or beef tallow from soiled articles.
A method which comprises laundering a soiled textile article in water having a temperature less than 30° C. in the presence of a detergent to produce a cleaned textile article, wherein the detergent comprises a mid-chain headgroup surfactant, wherein the surfactant is a sulfate or ether sulfate of an alcohol selected from the group consisting of 8-hexadecanol, 9-octadecanol, and 10-eicosanol.
A method which comprises laundering a soiled textile article in water having a temperature less than 30° C. in the presence of a detergent to produce a cleaned textile article, wherein the detergent comprises an alkylene-bridged surfactant, wherein the surfactant is a 2-hexyl-1-decyl sulfate, a 2-octyl-1-decyl sulfate, a 2-hexyl-1-dodecyl sulfate, a 2-hexyl-1-nonyl sulfate, a 2-heptyl-1-decyl sulfate, a 2-octyl-1-undecyl sulfate, or a mixture thereof.
A method which comprises liquefying a greasy soil in water at a temperature less than 30° C. in the presence of a detergent comprising an alkylene-bridged surfactant selected from the group consisting of 2-hexyl-1-decyl sulfates, 2-octyl-1-decyl sulfates, 2-hexyl-1-dodecyl sulfates, 2-hexyl-1-nonyl sulfates, 2-heptyl-1-decyl sulfates, 2-octyl-1-undecyl sulfates, and mixtures thereof.
Dependencies are inferred from the claim text.