Cleaning and liquid contact with solids – Processes – Oils – grease – tar – or wax removal – by dissolving
Patent
1992-06-10
1993-08-10
Garvin, Patrick P.
Cleaning and liquid contact with solids
Processes
Oils, grease, tar, or wax removal, by dissolving
434 2, 434 42, 252135, C23G 506
Patent
active
052345068
ABSTRACT:
The present invention relates to environmentally safe aqueous cleaning compositions for cleaning electronic circuit assemblies, such as printed circuit or printed wiring boards, during their fabrication. Alkali metal carbonate and bicarbonate salts are utilized with an alkali metal silicate to achieve a variety of objectives, among which are the removal of solder flux, oils, waxes, and greasy substances, adhesives and other residues as well as provide anti-corrosion protection and metal brightening.
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Cala Francis R.
Lajoie M. Stephen
Vinci Alfredo
Winston Anthony E.
Barris Charles B.
Church & Dwight & Co., Inc.
Garvin Patrick P.
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