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US 6,548,466 B1Granted
Heterocyclic dry-cleaning surfactant and method for using the same
AssigneeUnilever Home & Personal Care USA, Division of Conopco, Inc.
InventorsDennis Stephen Murphy, Robert Joseph Ahart
Life of this patent
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Abstract
This invention is directed to a surfactant comprising a heterocyclic group that results in superior cleaning in a dry cleaning system. The surfactant can have one or more heteroatom and can result in reverse micelle formation in a densified gas like densified carbon dioxide.
Claims12
A dry cleaning system comprising:
- (a) a continuous phase solvent selected from a silicone comprising solvent;
- and
- (b) a surfactant comprising the formula:
- wherein each R and T are independently a hydrogen, C5 to C18 hydrocarbon, polysiloxane, CO2 soluble polyalkylene oxide or halocarbon, with the proviso that at least T or one R group is not hydrogen, L is C(R2) or y-(T)t, x is an integer from about 1 to about 6, each y is independently N, P, S, B or O and t is 0 or 1 with the proviso that t is 0 when y is oxygen.
1 more element
Dependencies are inferred from the claim text.