Compositions containing fluorinated hydrocarbons and oxygenated solvents
View Patent ↗The present invention concerns the field of fluorinated hydrocarbons and relates to novel compositions containing fluorinated hydrocarbons and oxygenated solvents. More particularly, the compositions comprise a fluorinated base, diacetone alcohol (DAA), and DMSO and/or secondary butanol. These novel compositions can be used in particular in all solvent applications of HCFC 141 b (hydrochlorofluorocarbon 141 b ), in particular in various operations for treating solid surfaces, such as the cleaning, degreasing, defluxing or drying of solid surfaces.
1. Composition comprising a fluorinated base selected from the group consisting of hydrofluorocarbons, hydrofluoro ethers and mixtures thereof, diacetone alcohol, and dimethyl sulfoxide and optionally secondary butanol.
2. Composition according to claim 1 , comprising from 1 to 88% by weight of fluorinated base, from 5 to 94% by weight of diacetone alcohol, and from 5 to 70% by weight of dimethyl sulfoxide and optionally secondary butanol.
3. Composition according to claim 1 , comprising from 5 to 80% of fluorinated base, from 15 to 85% of diacetone alcohol and from 5 to 50% of dimethyl sulfoxide and optionally secondary butanol.
4. Composition according to claim 1 wherein said fluorinated base comprises one or more halogenated compounds having a surface tension of less than 30 mN/m and a zero ozone degradation potential.
5. Composition according to claim 1 wherein said composition further comprises trans-1,2-dichloroethylene.
6. Composition according to claim 1 , wherein said hydrofluorocarbons are selected from the group consisting of 1,1,1,3,3-pentafluorobutane (HFC 365 mfc), 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC 4310 mee), 1,1,1,2-tetrafluoroethane (HFC 134 a), pentafluoroethane (HFC 125), 1,1,1-trifluoroethane (HFC 143 a), difluoromethane (HFC 32), 1,1-difluoroethane (HFC 152 a), 1-fluoroethane (HFC 161), 1,1,1,2,3,3,3-heptafluoropropane (HFC 227 ea), 1,1,1,3,3, pentafluoropropane (HFC 245 fa), octafluoropropane (HFC 218), (perfluorobutyl)ethylene (C 4 H 9 CH═CH 2 ), 1,1,2,2,3,4,5-heptafluorocyclopentane (C 5 H 3 F 7 ), perfluorohexylethylene (C 6 F 13 CHCH 2 ), tridecafluorohexane (C 6 F 13 H) and perfluoro(methylmorpholine) (PF 5052).
7. Composition according to claim 4 wherein said fluorinated base comprises a mixture of 1,1,1,3,3-pentafluorobutane and 1,1,1,2,3,4,4,5,5,5-decafluoropentane and, optionally, 1,1,1,2,3,3,3-heptafluoropropane.
8. Composition according to claim 4 , wherein said one or more halogenated compounds are selected from the group consisting of methylheptafluoropropyl ether (C 3 F 7 OCH 3 ), methylnonafluorobutyl ether (C 4 F 9 OCH 3 ), ethylnonafluorobutyl ether (C 4 F 9 OC 2 H 5 ) and perfluoropyran (C 5 F 10 O).