SURFACTANTS THAT IMPROVE THE CLEANING OF LIPID-BASED STAINS TREATED WITH LIPASES
Described are compositions and methods relating to the removal of oily stains from fabrics and other surfaces using a lipase in combination with a selected surfactant to mediate the release of fatty acids generated by the lipase. The compositions and methods have application in, e.g., laundry cleaning and dishwashing.
1 . A cleaning composition for removing oily stains, comprising:
a) a lipolytic enzyme for hydrolyzing fatty acid esters present in the oily stain to produce free fatty acids, and
b) a surfactant for solubilizing the free fatty acids in the cleaning composition, thereby releasing the free fatty acids from the stain,
wherein the amount of release of fatty acids from the stain is greater than that achieved using an equivalent composition lacking the surfactant.
2 . The cleaning composition of claim 1 , wherein the cleaning composition is a laundry detergent or a dishwashing detergent.
3 . The cleaning composition of claim 1 , wherein the cleaning composition is a single composition comprising the lipolytic enzyme and the surfactant.
4 . The cleaning composition of claim 1 , wherein the cleaning composition is a two-part composition, the first part comprising the lipolytic enzyme and second part comprising the surfactant, wherein the first part and the second part are combined prior to contacting the stain.
5 . The cleaning composition of claim 1 , wherein the surfactant is a sugar-based non-ionic surfactant.
6 . The cleaning composition of claim 1 , wherein the surfactant is a maltopyranoside or a glucopyranoside.
7 . The cleaning composition of claim 1 , wherein the surfactant is a cyclic-maltopyranoside.
8 . The cleaning composition of claim 5 , wherein the sugar is maltose, glucose, or sucrose.
9 . The cleaning composition of claim 5 , wherein, the sugar-based surfactant has an aliphatic portion comprising at least 4 carbons.
10 . The cleaning composition of claim 1 , wherein the surfactant is selected from the group consisting of a Triton or oxide non-ionic surfactant, a zwitterionic surfactant, a FOS-choline or a sulfobetaine surfactant.
11 - 13 . (canceled)
14 . A method for removing an oily stain from a surface, comprising:
contacting the surface with a lipolytic enzyme and a surfactant,
hydrolyzing fatty acid esters present in the oily stain with the lipolytic enzyme to produce free fatty acids, and
solubilizing the free fatty acids produced by the lipolytic enzyme with the surfactant,
thereby removing the oily stain from the surface.
15 . The method of claim 14 , wherein the lipolytic enzyme and the surfactant are present in a single cleaning composition.
16 . The method of claim 14 , wherein the lipolytic enzyme and the surfactant are present in different cleaning compositions that are combined prior to the contacting.
17 . The method of claim 14 , wherein the lipolytic enzyme and the surfactant are present in different cleaning compositions that are combined upon the contacting.
18 . The method of claim 14 , wherein the method further includes rinsing the surface.
19 . The method of claim 14 , wherein the surfactant is a sugar-based non-ionic surfactant.
20 . The method of claim 14 , wherein the surfactant is a maltopyranoside, a glucopyranoside, or a cyclic-maltopyranoside.
21 . The method of claim 19 , wherein the sugar is maltose, glucose, or sucrose.
22 . The method of claim 14 , wherein the surfactant is selected from the group consisting of a Triton or oxide non-ionic surfactant, a zwitterionic surfactant, a FOS-choline or a sulfobetaine surfactant.
23 - 24 . (canceled)
25 . The method of claim 14 , wherein the surface is selected from the group consisting of a fabric surface, a dishware surface and a hard surface.
26 - 27 . (canceled)