Cleaning solvent composition and a method for cleaning or drying articles
AssigneeDaikin Industries, Ltd.
InventorsSatoshi Ide, Takahiro Matsuda, Hirokazu Aoyama, Akinori Yamamoto
Life of this patent
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Abstract
A cleaning solvent composition comprising at least one selected from the group consisting of 1H,2H/-hexafluorocyclobutane, 1,2,2,3,3-pentafluoro-cyclobutane, 1,2,2,3,3,4,4,5,5-nonafluorocyclopentane, 1H/2H-octafluorocyclopentane, 1H,2H/-octafluorocyclopentane, 1H/3H-octafluorocyclopentane, 1H,4H,2H/-heptafluorocyclopentane, 1H,2H/4H-heptafluorocyclopentane, 1H,2H,4H/-heptafluorocyclopentane, 1H,3H/2H-heptafluorocyclopentane, 1H,2H/3H-heptafluorocyclopentane and 1H,2H/3H-heptafluorocyclopentane and a method for cleaning or drying acticles employing thereof and use of the composition as a cleaning agent.
Claims4
A cleaning solvent composition comprising 1H,2H/-hexafluorocyclobutane and at least one organic solvent selected from the group consisting of:
- hydrocarbons consisting of hexane, heptane, isoheptane, octane, isooctane, methylcyclopentane, cyclohexane, methylcyclohexane and toluene;
- alcohols having 1-6 carbon atoms;
- esters composed of fatty acid having about 1-5 carbon atoms and lower alcohols having about 1-6 carbon atoms;
- and ketones represented by the formula R--CO--R.sup.1 wherein R and R.sup.1 represent straight or branched saturated hydrocarbons having 1-4 carbon atoms.
A method for cleaning articles comprising a cleaning step to remove pollutants comprising putting pollutant adhered articles in contact with at least one organic solvent having a boiling point of 100.degree. C. or higher selected from the group consisting of aliphatic hydrocarbons consisting of n-hexane, isoheptane, isooctane, gasoline, petroleum naphtha, mineral spirit and kerosene;
- aromatic or alicyclic hydrocarbons consisting of benzene, toluene, xylene, cyclohexane, methylcyclohexane, tetralin, decalin, dipentene, cymene, terpene, .alpha.-pinene and turpentine oil;
- higher alcohols consisting of 2-ethylbutylalcohol, 2-ethylhexylalcohol, nonylalcohol, decylalcohol and cyclohexanol;
- glycol ethers consisting of ethyleneglycol monomethylether, ethyleneglycol monobutylether, diethyleneglycol monoethylether, diethyleneglycol dimethylether and diethyleneglycol monoethylether;
- and organic silicons consisting of dimethylpolysiloxane, cyclopolysiloxane and octamethylcyclotetrasiloxane;
- and rinsing said contacted articles with a rinsing composition comprising 1H,2H/-hexafluorocyclobutane and optionally at least one organic solvent selected from the group consisting of:
- hydrocarbons consisting of hexane, heptane, isoheptane, octane, isooctane, methylcyclopentane, cyclohexane, methylcyclohexane and toluene;
- alcohols having 1-6 carbon atoms;
- esters composed of fatty acids having about 1-5 carbon atoms and lower alcohols having about 1-6 carbon atoms;
- and ketones represented by the formula R--CO--R.sup.1 wherein R and R.sup.1 represent straight or branched saturated hydrocarbons having 1-4 carbon atoms.
A method for cleaning articles comprising putting the articles to which pollutants are adhered in contact with a composition comprising 1H,2H/-hexafluorocyclobutane and optionally at least one organic solvent selected from the group consisting of:
- hydrocarbons consisting of hexane, heptane, isoheptane, octane, isooctane, methylcyclopentane, cyclohexane, methylcyclohexane and toluene;
- alcohols having 1-6 carbon atoms;
- esters composed of fatty acids having about 1-5 carbon atoms and lower alcohols having about 1-6 carbon atoms;
- and ketones represented by the formula R--CO--R.sup.1 wherein R and R.sup.1 represent straight or branched saturated hydrocarbons having 1-4 carbon atoms.
A method for drying articles comprising putting the articles to which pollutants are adhered in contact with a composition comprising 1H,2H/-hexafluorocyclobutane and optionally at least one organic solvent selected from the group consisting of:
- hydrocarbons consisting of hexane, heptane, isoheptane, octane, isooctane, methylcyclopentane, cyclohexane, methylcyclohexane and toluene;
- alcohols having 1-6 carbon atoms;
- esters composed of fatty acids having about 1-5 carbon atoms and lower alcohols having about 1-6 carbon atoms;
- and ketones represented by the formula R--CO--R.sup.1 wherein R and R.sup.1 represent straight or branched saturated hydrocarbons having 1-4 carbon atoms.
Dependencies are inferred from the claim text.