Low-phosphate liquid cleaning composition
AssigneeEconomics Laboratory, Inc.
InventorSandra L. Bull
Life of this patent
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Abstract
Aqueous alkaline cleaning concentrates and wash solutions are disclosed which comprise an alkali metal hydroxide, a water-conditioning acrylic polymer, an active chlorine source and a fatty or oily soil-dispersing amount of a phosphinopolycarboxylic acid. The wash solutions are particularly useful to clean cleaned-in-place food-processing equipment which has been fouled with greasy or oily soils.
Claims16
A process for cleaning an article fouled with fatty or oily soil comprising:
- (A) dissolving about 0.1-5.0 parts by weight of a liquid cleaning concentrate in about 100 parts by weight of water to form an aqueous wash solution said concentrate comprising:
- a solution of
- (a) about 5-35% of an alkali metal hydroxide;
- (b) about 0.5-15% of a water-soluble acrylic polymer having a molecular weight of about 1,000-15,000;
- (c) an amount of an active chlorine source effective to provide the concentrate with about 2-10% available chlorine;
- (d) an amount of a phosphinopolycarboxylic acid effective to disperse fatty or oily soil;
- (e) about 50-90% water;
- and
- (B) contacting said aqueous wash solution of (A) with the fouled article for a period of time effective to disperse said fatty or oily soil.
An aqueous alkaline cleaning concentrate effective to disperse and degrade fatty or oily soil comprising:
- a solution of
- (a) about 5-35% of an alkali metal hydroxide;
- (b) about 0.5-15% of a water-conditioning acrylic polymer having a molecular weight of about 1,000-15,000;
- (c) an amount of an active chlorine source effective to provide the concentrate with about 2-10% available chlorine;
- (d) about 0.05-15% of a water-soluble phosphinopolycarboxylic acid having a molecular weight of about 250-5000;
- and
- (e) about 50-90% water.
An aqueous alkaline cleaning concentrate effective to disperse and degrade fatty or oily soil comprising:
- a solution of
- (a) about 10-20% sodium hydroxide, potassium hydroxide or mixtures thereof;
- (b) about 1-10% of an acrylic polymer comprising polyacrylic acid, the partial sodium salt of polyacrylic acid or sodium polyacrylate having a molecular weight of about 1000-6000;
- (c) an amount of sodium hypochlorite or calcium hypochlorite effective to provide about 2-10% available chlorine;
- (d) about 0.1-6% of a phosphinoacrylic polymer having a molecular weight of about 200-5000 and a weight ratio of polyacrylic acid to phosphinoxy units of from about 3:1 to 35:1;
- and
- (e) about 50-90% water.
Dependencies are inferred from the claim text.