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US 7,361,632 B2Granted
Water soluble glass as corrosion protector in dishwashing machines
AssigneeReckitt Benckiser N.V.
InventorKarlheinz Ulrich Gerhard Hahn
Life of this patent
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Abstract
A zinc-containing, water-soluble glass composition comprising from 41 to 54 mole % of P2O5, 10 to 30 mole % of alkali oxides, up to 5 mole % of SO3 and up to 25 mole % of ZnO.
Claims20
A process for the inhibition of corrosion of glassware in an automatic dishwashing process which comprises the step of:
- contacting said glassware in an automatic dishwashing process with a zinc-containing, water-soluble glass composition comprising:
- from 41 to 54 mole % of P2O5,
- 10 to 30 mole % of alkali metal oxides,
- up to 5 mole % of SO3 and
- up to 25 mole % of ZnO.
2 more elements
A process for the inhibition of corrosion of glassware in an automatic dishwashing process characterised by:
- providing a zinc-containing, water-soluble glass composition comprising;
- from 41 to 54 mole % of P2O5,
- 10 to 30 mole % of alkali metal oxides,
- up to 5 mole % of SO3 and
- up to 25 mole % of ZnO;
- at an appropriate place within an automatic dishwashing machine wherein the said composition is accessible to the wash liquor and/or rinse water.
3 more elements
A process for the inhibition of corrosion of glassware in an automatic dishwashing process characterised by:
- contacting the glassware, in an automatic dishwashing machine, with wash liquor and/or rinse water containing an effective amount of a zinc-containing, water-soluble glass composition comprising;
- from 41 to 54 mole % of P2O5,
- 10 to 30 mole % of alkali metal oxides,
- up to 5 mole % of SO3 and up to 25 mole % of ZnO.
1 more element
Dependencies are inferred from the claim text.