Method for cleaning and drying of metallic and nonmetallic surfaces
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United States of America Patent
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Mar 14, 1995
Issued Date -
N/A
app pub date -
Feb 17, 1993
filing date -
Sep 18, 1992
priority date (Note) -
Expired
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Abstract
The present invention relates to an aqueous composition and improved process useful for cleaning and facilitate drying of various metallic and non-metallic surfaces or components. According to the invention the water-immiscible hydrocarbon or non-halogenated organic solvent cleaning step is followed by an aqueous displacement solution (ADS) which contains a surfactant component and a pH modifier component in sufficient amounts to substantially displace the hydrophobic organic solvent residue from on the surface of the substrate and prevent its redeposition. The improved process is an alternative for replacing the ozone depleting chlorofluorocarbons and Halogenated solvents (ODS) or other volatile organic solvents (VOC) being commonly used in cleaning variety of industrially manufactured metallic and non-metallic components. The present invention provides an effective method for removal of various light and heavy surface contaminants such as, but not limited to, fluxes, oils, waxes, buffing and lapping compounds, finger prints, silicone oils, metal forming lubricants, polymers and mold release compounds.
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