Compositions for cleaning articles with 2-ethylhexanol and p-cymene
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United States of America Patent
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Nov 7, 1995
Issued Date -
N/A
app pub date -
Jan 21, 1994
filing date -
Aug 14, 1990
priority date (Note) -
Expired
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Abstract
The invention relates to compositions for cleaning a wide range of soil types from dirty articles, such as metal, ceramic or glass substrates. A first class of solvent compositions used for cleaning is an oxidative stable mixture of non-polar aromatic hydrocarbons (p-cymene) and an organic polar component (2-ethylhexanol) for cleaning of low and intermediate polar soils. Alternately, water and surfactant is added to the mixture to form a water-in-oil emulsion for cleaning high polarity soils. A second class of solvent compositions used for cleaning dirty articles is a hydrogenated or dehydrogenated analogue of a terpene compound. The solvent composition is used in a process wherein a dirty article is contacted with the solvent under conditions that result in cleaning the soil type from the article. Residual solvent contamination is removed from the article surface by contacting the contaminated article at an elevated temperature with an aqueous medium and/or a low-boiling solvent. The solvent residue is then removed by evaporation.
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