Back to results
US 8,263,540 B2Granted
Detergent compositions with combinations of acrylic and maleic acid homopolymers and/or salts thereof for aluminum protection
AssigneeEcolab USA Inc.
InventorsErik Christian Olson, Devon Beau Hammel
Life of this patent
Estimating the term…
Abstract
A warewashing detergent composition is provided for use for in cleaning of alkaline sensitive metals such as aluminum or aluminum containing alloys. The compositions include alternatives to sodium tripolyphosphate and/or other phosphorous containing raw materials, while retaining cleaning performance and corrosion prevention. According to the invention, a synergistic combination of polyacrylic and polymaleic polymers are used as corrosion inhibitors in traditional alkaline detergent compositions.
Claims12
A detergent composition comprising:
- (a) an alkaline source in an amount effective to provide a use composition having a pH of at least about 8 and obtained by diluting the warewashing detergent composition with water;
- said alkaline source in an amount of from about 35 wt. % to about 55 wt. %
- (b) a corrosion inhibitor component in an amount of from about 20 wt. % to about 35 wt. % said amount sufficient for reducing corrosion of aluminum or aluminum containing alloys, the corrosion inhibitor component consisting of polyacrylic and polymaleic homopolymers or their salts in a wt. % ratio of about greater than 1:1 polyacrylic homopolymer to polymaleic homopolymer
- (c) a surfactant in an amount of from about 1 wt. % to about 5 wt. % and
- (d) water in an amount from about 10 wt % to about 60 wt. %.
2 more elements
Dependencies are inferred from the claim text.