Aqueous cleaning concentrates
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United States of America Patent
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Jul 11, 1995
Issued Date -
N/A
app pub date -
Oct 13, 1993
filing date -
Jul 17, 1991
priority date (Note) -
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Importance
Abstract
The present invention is directed to aqueous cleaning concentrates such as for cleaning electronic circuit assemblies comprising 15-30 wt. % of a composition containing alkaline salt, an alkali metal silicate to boost detersive action or to provide corrosion protection to the substrates which are cleaned, an anionic polymer comprising a high molecular weight polyacrylic acid which stabilizes the alkali metal silicate to prevent precipitation of the silicate from solution, surfactants, and a hydrotrope to maintain the surfactants in solution and the balance water.
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