Cleaning and drying solvent
AssigneeOlympus Optical Co., Ltd.
InventorsMasamichi Hijino, Michio Shirai, Kunihiko Uzawa
Life of this patent
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Abstract
A cleaning and drying solvent is disclosed which has excellent cleaning power and drying property and finds uses as a hand-cleaning agent, a precise cleaning agent and a drying agent for industrial parts. Since it does not contain halogens causing the depletion of the ozone layer, it is available as a solvent replacing freon. The cleaning and drying solvent is composed of a siloxane compound, in particular, hexamethyldisiloxane, an azeotropic or azeotrope-like composition of hexamethyldisiloxane and a lower alcohol, or a mixture of hexamethyldisiloxane and each of ketones, carboxylic esters, low molecular saturated hydrocarbons and low molecular alcohols.
Claims9
A method of cleaning and drying an object which comprises contacting the object with a solvent, wherein said solvent consists essentially of hexamethyldisiloxane and ethanol,
- said hexamethyldisiloxane and said ethanol being present in respective amounts of 55 to 70% by weight and 30 to 45% by weight based on the weight of the solvent and forming azeotropic or azeotropic-like combination.
- wherein said hexamethyldisiloxane is at least 99.0% weight pure, the amount of ingredients having boiling points ranging from 210.degree. to 230.degree. C. in said solvent is less than 0.01% by weight, and said solvent does not contain any ingredients having boiling points higher than 230.degree. C.
A method of cleaning and drying an object which comprises contacting the object with a solvent, wherein said solvent consists essentially of hexamethyldisiloxane and methanol,
- said hexamethyldisiloxane and said methanol being present in respective amounts of 30 to 95% by weight and 5 to 70% by weight based on the weight of the solvent and forming azeotropic or azeotropic-like combination,
- wherein said hexamethyldisiloxane is at least 99.0% by weight pure, the amount of ingredients having boiling points ranging from 210.degree. to 230.degree. C. in said solvent is less than 0.01% by weight, and said solvent does not contain any ingredients having boiling points higher than 230.degree. C.
A method of cleaning and drying an object which comprises contacting the object with a solvent, wherein said solvent consists essentially of hexamethyldisiloxane and 2-propanol,
- said hexamethyldisiloxane and said 2-propanol being present in respective amounts of 25 to 95% by weight and 5 to 75% by weight based on the weight of the solvent and forming azeotropic or azeotropic-like combination,
- wherein said hexamethyldisiloxane is at least 99.0% by weight pure, the amount of ingredients having boiling points ranging from 210.degree. to 230.degree. C. in said solvent is less than 0.01% by weight, and said solvent does not contain any ingredients having boiling points higher than 230.degree. C.
Dependencies are inferred from the claim text.