Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2001-06-19
2003-04-29
Ogden, Necholus (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S421000, C510S424000, C510S426000, C510S477000, C510S499000
Reexamination Certificate
active
06555511
ABSTRACT:
This invention relates to detergent compositions.
More particularly, the invention concerns detergent compositions that have an improved ability to defoam proteins compared the prior art, over a wide temperature range, with very low surface tension (i.e., below about 35 dynes/cm) and with excellent wetting properties at very high dilution rates.
In another aspect the invention provides a detergent composition that is easily soluble in and stable in an aqueous cleaning preparation containing a high concentration of sodium hydroxide, potassium hydroxide, phosphoric acid or hydrochloric acid.
In yet another respect, the invention concerns aqueous detergent-cleaner compositions, with enhanced wetting and defoaming properties, that are especially useful in cleaning food processing apparatus contaminated with protein deposits, for example, beer brewing apparatus, and apparatus used in processing diary and related food products.
According to another aspect of the invention, methods are provided for cleaning food processing equipment, using such cleaning compositions.
In its broadest aspect, the detergent composition includes a “low” cloud point surfactant (≦30° C., preferably ≦25° C.) and a “high” cloud point surfactant (≦30° C., preferably ≦25° C.). This combination of surfactants provides suitable defoaming characteristics over a wide range of temperatures.
REFERENCES:
patent: 6277801 (2001-08-01), Dahanayake et al.
patent: 6339057 (2002-01-01), Knox et al.
Drummond & Duckworth
Ogden Necholus
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