Azeotropic solvent composition
AssigneeDaikin Industries, Ltd.
InventorsKohji Tamura, Yukio Omure, Satoshi Ide, Naoyoshi Hanatani, Toshimasa Fukuzawa
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Abstract
An azeotropic solvent composition which comprises an azeotropic mixture of 77% by weight of Flon-113 and 23% by weight of cyclopentane. The composition can decrease the amount of 1,1,2-trichloro-1,2,2-trifluoroethane excellent in power for dissolving fats and oil, grease, and particularly, waxes used for temporarily fixing silicon wafers, quartz, ceramics without erosion of materials made of plastics and rubbers, and it is easy to control the liquid composition and easy to recover and reuse the composition.
Claims2
An azeotropic solvent composition consisting essentially of an azeotropic mixture of 77 % by weight of 1,1,2-trichloro-1,2,2-trifluoroethane and 23 % by weight of cyclopentane and having a boiling point of about 45.4.degree. C. at normal pressure.
An azeotrope consisting essentially of 77 % by weight of 1,1,2,-trichloro-1,2,2-trifluoroethane and 23 % by weight of cyclopentane.
Dependencies are inferred from the claim text.