Stable liquid enzyme compositions
First Claim
1. A liquid enzyme cleaning composition comprising a surfactant, a detersive enzyme, about 10% to about 20% by weight of a boric acid salt, and 40% to about 85% by weight water;
- wherein the liquid enzyme cleaning composition is formulated to provide detersive enzyme that retains 80% of its initial enzyme activity at ambient temperature for at least 30 days after forming the composition.
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Abstract
The present invention relates to a liquid enzyme cleaning composition in which the enzyme is stable at alkaline pH and: at high concentration of boric acid salt; in the absence of sodium ion; and/or in the presence of at least about 40 wt-% water. In an embodiment, water is present at concentrations of at least about 60 weight percent. The present enzyme cleaning composition typically yields superior soil (especially protein soil) removal properties. In an embodiment, the composition of the invention stabilizes the enzyme with potassium and/or alkanolamine borate.
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11 Claims
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1. A liquid enzyme cleaning composition comprising a surfactant, a detersive enzyme, about 10% to about 20% by weight of a boric acid salt, and 40% to about 85% by weight water;
wherein the liquid enzyme cleaning composition is formulated to provide detersive enzyme that retains 80% of its initial enzyme activity at ambient temperature for at least 30 days after forming the composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
Specification