Aqueous compositions comprising protease and/or amylase
AssigneeReckitt Benckiser N.V.
InventorsChris Efstathios Housmekerides, Daniele Fregonese
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Abstract
An enzyme-containing laundry booster composition in which the enzyme is stabilized by a system comprising a boron compound, an alkali metal salt of an aliphatic hydroxydi- or hydroxylic-carboxylic acid and an alkali metal chloride. A preferred additional stabilizing ingredient is a C8-C18 alcohol alkoxylated with about 3 to 6 moles of ethylene oxide.
Claims10
An aqueous enzyme containing laundry booster composition comprising by weight:
- (a) from about 0.05% to about 5% of a protease and/or an amylase enzyme,
- (b) an enzyme stabilization system comprising:
- (1) from about 0.005% to about 3.0% of a boron compound selected from boric acid, boric oxide, alkali metal borates and mixtures thereof,
- (2) from about 5.0% to about 20% of an alkali metal salt of an aliphatic hydroxydi- or hydroxytri-carboxylic acid having from 1 to 4 hydroxy groups and from 4 to 8 carbon atoms, and
- (3) from about 2% to about 15% of an alkali metal chloride,
- said percentages being based on the entire composition, and
- (c) sufficient amount of an alkali hydroxide to attain a pH in the range of from 7.0 to 8.5.
A laundry booster composition according to any of the preceding claims in which the enzyme is a protease enzyme.
A laundry booster composition according to any of the preceding claims in which sufficient sodium hydroxy is added to bring the pH to a range of from 7.0 to 7.5.
A laundry booster composition according to any of the foregoing claims which additionally comprises from about 0.01% to about 1.0% of speckles comprising:
- (a) a solid core ingredient capable of enhancing stabilization of the enzyme,
- (b) a coating which melts at a temperature attained during a washing cycle, and
- (c) a dye.
Dependencies are inferred from the claim text.