Dishwashing method
AssigneeThe Procter & Gamble Company
InventorsNathalie Sophie Letzelter, Alexander Charles Hollingsworth, Fernando Solache Leon, Victoria Wray, Neil Bradley
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Abstract
An automatic dishwashing liquor comprising: a) from about 0.5 to about 10 ppm of orthophosphate expressed as elementary phosphorous; b) from about 40 to about 600 ppm of a first polymer comprising: i) carboxylic acid monomers; ii) monomers comprising a sulfonic acid group wherein the monomers comprising a sulfonic acid group represent 10% or less of the polymer on a molar basis; c) from about 15 to about 150 ppm of a phosphonate; d) a bleach system comprising bleach and a bleach catalyst; and e) less than 30 ppm of polyphosphate.
Claims15
An automatic dishwashing liquor comprising:
- a) from about 0.5 to about 10 ppm of orthophosphate expressed as elementary phosphorous;
- b) from about 40 to about 600 ppm of a first polymer comprising:
- i) carboxylic acid monomers;
- ii) monomers comprising a sulfonic acid group wherein the monomers comprising a sulfonic acid group represent 10% or less of the polymer on a molar basis;
- c) from about 15 to about 150 ppm of a phosphonate;
- d) a bleach system comprising bleach and a bleach catalyst;
- and
- e) less than 30 ppm of polyphosphate.
A method of washing a dishwashing load in an automatic dishwasher in the presence of orthophosphate, the method comprising the steps of:
- 1) subjecting the load to wash water comprising from about 0.5 to about 20 ppm of orthophosphate expressed as elementary phosphorous;
- and
- 2) providing from about 10 g to about 10 g of an automatic dishwashing composition comprising:
- a) from about 1 to about 15% by weight of the composition of a first polymer comprising:
- i)carboxylic acid monomers;
- ii) monomers comprising a sulfonic acid group;
- wherein the monomers comprising a sulfonic acid group represent 10% or less of the polymer on a molar basis;
- b) from about 0.5 to about 5% by weight of the composition of a phosphonate;
- c) a bleach system comprising bleach and a bleach catalyst;
- and
- d) less than 1% of polyphosphate.
Dependencies are inferred from the claim text.