Detergent compositions containing a stabilized enzyme by phosphonates
AssigneeEcolab USA Inc.
InventorsWendy Lo, Erik C. Olson
Life of this patent
Estimating the term…
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.
Claims23
A solid detergent composition comprising:
- an alkaline source comprising a metal carbonate, metal bicarbonate, metal silicate, or mixture thereof;
- from about 0.1 wt-% to 1 wt-% of a phosphonate;
- and
- an enzyme comprising a protease, amylase, lipase, cellulase, peroxidase, gluconase, or mixture thereof;
- wherein the phosphonate is represented by a formula of
- or salt thereof, wherein R10 and R11 are independently hydrogen, a substituted carboxylic acid, phosphonate, ethanol, diglyco, substituted alkyl, 2-(EO)n-biphosphonateamine-ethyl, 2-(PO)n-biphosphonateamine-isopropyl, or phosphonate-methyl, or wherein R10 and R11 are both —CH2—PO(OH)2 groups;
- and
- wherein a use solution of the composition retains at least 50% enzyme activity at 120° F. for at least 4 hours.
Dependencies are inferred from the claim text.