Concrete masons' hand rinse

Details Concrete masons' hand rinse Concrete masons' hand rinse

1997-01-31

1998-08-11

McKane, Joseph K.

Compositions

Co, s, negative element, or acid, bindant containing

Alkali-metal or alkali-metal compound containing

252 1, 252193, 424604, 424639, 510100, 510138, 510159, 510240, 106740, A61K 740, A62D 300

Patent

active

057923841

ABSTRACT:
A buffer solution comprising one or more metal salts, preferably monobasic potassium phosphate and/or monosodium phosphate, dissolved in water creates a rinse having a pH near that of human skin. The buffer solution in various concentrations and compositions is adapted for routine use by professional and casual users of cement to rinse their skin and tools, as a spray-on application for skin and clothes, and as a pre-wash for laundry. The buffer solution may include other metal salts, preferably manganese sulfate, further to reduce hexavalent chromium carried into the rinse from cement. A pH color indicator such as phenolphthalein also may be included to signal when the buffer solution becomes ineffective from prolonged use.

REFERENCES:
patent: 4572739 (1986-02-01), Rasmussen
patent: 5227161 (1993-07-01), Kessler
patent: 5362321 (1994-11-01), Larsen

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