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US 4,305,837 AGranted
Stabilized aqueous enzyme composition
AssigneeThe Procter & Gamble Company
InventorsGeorge J. Kaminsky, Ronald S. Christy
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Abstract
Stabilized aqueous enzyme compositions contain a stabilizing system comprising calcium ions and a low molecular weight carboxylic acid or salt, preferably a formate, preferably with a low molecular weight alcohol, and in a pH range of from about 6.5 to about 10. Most preferred is a detergent composition containing the stabilized enzymes.
Claims10
A stabilized aqueous enzyme composition consisting essentially of:
- (a) from 0% to about 75% of a detergent surfactant selected from the group consisting of nonionic, anionic, cationic, zwitterionic, amphoteric and semi-polar nonionic surfactants and mixtures thereof;
- (b) from about 0.025% to about 10% pure proteolytic enzyme;
- (c) from 0 to about 60% of a low molecular weight primary or secondary alcohol;
- (d) from about 3% to about 10% of a water soluble formate;
- (e) a soluble calcium salt to give from about 2 to about 10 millimoles of calcium ion per liter;
- (f) triethanolamine as an alkaline buffering agent;
- and
- (g) the balance water,
- the pH of the product being from about 8.5 to about 10.
6 more elements
Dependencies are inferred from the claim text.