Detergent compositions containing a stabilized enzyme by phosphonates
AssigneeEcolab USA Inc.
InventorsWendy Lo, Erik C. Olson
Life of this patent
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Abstract
Detergent compositions that contain an enzyme, alkaline source, and phosphonate or amine phosphonate salt are described here. A use solution of the detergent compositions containing disclosed phosphonates can retain its enzyme activity for an extended period of time. Specifically, one specific type of phosphonates and another specific type of amine phosphonate salts were discovered to stabilize enzymes in detergent compositions. Solid detergent compositions that contain disclosed phosphonate or amine phosphonate salts are more effective to remove soils and can save production and use costs.
Claims11
A solid detergent composition comprising:
- an alkaline source, from about 0.1 wt-% to about 1 wt-% of an amine phosphonate salt, and an enzyme;
- wherein the alkaline source comprises a metal carbonate, metal bicarbonate, metal silicate, or mixture thereof;
- wherein the enzyme comprises a protease, amylase, lipase, or mixture thereof;
- and
- wherein the amine phosphonate salt is product of a phosphonate represented by a formula of
- and an amine, wherein R12, R13, and R14 are independently hydroxyl, methyl, —PO(OH)2, —CH2COOH, a substituted alkyl, phosphonate, ester thereof, salt thereof, or derivative thereof;
- and
- wherein the ingredients of the composition are mixed and used to produce a solid detergent;
- and
- wherein a use solution of the composition retains at least 50% enzyme activity at 120° F. for at least 4 hours.
A method of stabilizing an enzyme in a solid detergent, the method comprising:
- adding an amine phosphonate salt in an existing detergent composition containing an enzyme, wherein the amine phosphonate salt is a product of a phosphonate represented by of formula
- and an amine, and R12, R13, and R14 are independently hydroxyl, methyl, —PO(OH)2, —CH2COOH, a substituted alkyl, phosphonate, ester thereof, salt thereof, or derivative thereof;
- wherein a use solution of the solid detergent retains at least 50% enzyme activity at 120° F. for at least 4 hours.
Dependencies are inferred from the claim text.