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US 7,094,740 B2Granted
Zinc corrosion protection agents for treating glassware surfaces
AssigneeThe Procter & Gamble Company
InventorsPatricia Sara Berger, Brian Xiaoqing Song, James Robert Schwartz, Robert William Corkery
Life of this patent
Estimating the term…
Abstract
Corrosion protection agents for treating glassware surfaces, for example dishes and glasses, especially corrosion protection agents comprising zinc-containing materials are provided. Treatment systems and composition of matter, which incorporate these corrosion protection agents, are also provided.
Claims10
A domestic, institutional, industrial, and/or commercial corrosion protection agent for treating glassware surfaces in an aqueous wash liquor, said 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 reflection peak;
- and
- b) a dispersant polymer selected from the group consisting of polyaspartate, starches, celluloses and alginates, wherein said aqueous wash liquor has a pH of from greater than 9 to about 14.
Dependencies are inferred from the claim text.