Methods for treating glassware surfaces using corrosion protection agents
AssigneeThe Procter & Gamble Company
InventorsPatricia Berger, Brian Song, James Schwartz, Robert Corkery
Life of this patent
Estimating the term…
Abstract
Methods for treating glassware surfaces, for example dishes and glasses, using corrosion protection agents, especially corrosion protection agents comprising zinc-containing materials. Methods using corrosion protection agents that form a part of a treatment system and/or are incorporated in a composition of matter are also provided.
Claims14
A domestic, institutional, industrial, and/or commercial method of reducing glassware surface corrosion in an automatic dishwashing appliance comprising the step of contacting a glassware surface with a corrosion protection agent comprising:
- a) an effective amount of a zinc-containing layered material, said material having a particle size in the range of about 1 nm to about 100 nm and a crystallinity value of from about 0.4 to about 0.8625 FWHM units, at a 200 reflective peak;
- and
- b) optionally, an adjunct ingredient and
- c) a dispersant polymer:
- said contacting being done at a pH greater than 9 to about 14.
10-15. (canceled)
A domestic, institutional, industrial, and/or commercial method of using a composition of matter in an automatic dishwashing appliance for reducing glassware surface corrosion, said method comprises the step of contacting a glassware surface with a wash liquor;
- wherein said wash liquor comprises a corrosion protection agent comprising from about 0.0001 ppm to about 100 ppm of said zinc-containing layered material said material having a particle size in the range of about 1 nm to about 100 nm and a crystallinity value of from about 0.4 to about 0.8625 FWHM units, at a 200 reflective peak, and optionally, an adjunct ingredient, in said wash liquor during at least some part of the wash cycle in said automatic dishwashing appliance.
19-20. (canceled)
Dependencies are inferred from the claim text.