Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-12-20
1999-03-16
Ogden, Necholus
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510236, 510233, 510218, 510426, 510427, 510428, 510536, C11D 112
Patent
active
058830626
DESCRIPTION:
BRIEF SUMMARY
The formulator of a dishwashing detergent composition faces the challenge of deriving a formulation which meets a number of distinct consumer relevant performance demands.
Firstly, such a composition should be effective at removing soils from dirty "dishes" when used in a dishwashing process. The term "dishes" is used herein in a generic sense, and encompases essentially any items which may be found in a dishwashing load, including chinaware, glassware, plasticware, hollowware and cutlery, including silverware.
The soils encountered in dishwashing will largely but not exclusively be food based. Particularly difficult soils to remove would include greasy soils, burnt on food soils, dried on food soils, highly coloured soils derived from, e.g. highly coloured vegetables such as beetroot and tomato, as well as non-food soils such as lipstick on the rims of glasses or nicotine stains on saucers which have been used as ashtrays.
Manual dishwashing compositions are usually unbuilt, and may contain added levels of Ca and Mg to aid cleaning performance. Laundry and automatic dishwashing compositions typically contain high levels of builder. Hard-surface cleaner compositions whilst occasionally unbuilt, typically do not contain added Ca or Mg to boost performance.
Manual dishwashing compositions typically contain no bleaching components, which are by contrast common components of laundry, machine dishwashing and hard-surface cleaner compositions.
Manual dishwashing compositions are typically formulated to perform well at near neutral pH. Machine dishwashing, non-bleach containing hard surface cleaner compositions and laundry compositions are typically alkaline with a pH of usually 9-11. Bleach containing hard surface cleaner compositions are often acidic with a pH of less than 6.
A number of different washing methods are commonly used in manual dishwashing. Preferences as to method employed tend to reflect the geographic and cultural background of the person doing the washing-up.
One habit, commonly encountered in, for example, Northern Europe involves immersing the soiled dishes in a dilute solution of a dishwashing detergent composition, typically contained within a sink, and then rubbing the surface of the dishes with a cloth or sponge to remove soils, which are then taken into the wash solution.
Another habit, the direct application method, commonly encountered in Southern Europe, and Latin America, typically involves wetting the soiled dishes, followed by removing each dish from the water bath and rubbing its surface with a cloth or sponge soaked in, essentially, concentrated detergent product. The dish is then rinsed by immersion in a second water bath, or by being held in a stream of running water.
A further manual dishwashing habit, not commonly practised, involves contacting soiled dishes with a concentrated detergent product (e.g. using a spray dispenser), and allowing the product to remain on the surface of the dishes for a period of time. The dishes may subsequently be rinsed by immersion in a water bath or passing under a stream of running water, with optionally manual rubbing of the surface of the dishes with, e.g. a sponge or cloth, or using the rinse cycle of an automatic dishwashing machine. Alternatively, the dishes may be subjected to washing steps, utilising further detergent product, which may involve either a manual dishwashing method, or a washing method utilising an automatic dishwashing machine.
The Applicants have now discovered that a composition containing anionic surfactant and divalent cation (particularly Ca or Mg) having an acidic pH, gives remarkable performance benefits, particularly greasy cleaning performance benefits, when employed in a dishwashing method in which, essentially, concentrated detergent product is applied directly to the surface of the dishes, preferably followed by rinsing of the dishes.
SUMMARY OF THE INVENTION
There is provided a fluid detergent composition, suitable for use in a dishwashing method in which the detergent composition is applied to the dishes i
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Addison Michael Crombie
Allsebrook Andrew Micheal
Foley Peter Robert
Khosla Pankaj M.
Ogden Necholus
Patel Ken K.
Rasser Jacobus C.
The Procter & Gamble & Company
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