摘要:
A process for cleaning which comprises (1) cleaning articles to be cleaned with a cleaning solvent comprising a hydrocarbon as the main component, (2) rinsing the resulting article having the cleaning solvent adherent thereto with a rinsing solvent comprising a hydrofluorocarbon as the main component, and (3) separating the discharge from the rinsing step comprising the rinsing solvent and the hydrocarbon as contaminant into two phases, characterized by using as the rinsing solvent a cyclic hydrofluorocarbon wherein the number of fluorine atoms is larger than that of hydrogen atoms.
摘要:
Pour remplacer les compositions à base de CFC ou de HCFC dans les applications de nettoyage de surfaces solides (notamment défluxage), l'invention propose des compositions azéotropiques ou quasi azéotropiques à base de 1,1,1,2,2,4,4-heptafluorobutane et d'un alcool en C 1 -C 3 .
摘要:
Azeotrope-like compositions comprising 1,1-dichloro-1-fluoroethane; ethanol; and nitromethane are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards and dry cleaning.
摘要:
A cleaning solvent composition comprising an aliphatic fluorohydrocarbon represented by the general formula CnFmH2n+2-m (wherein n and m represent each a positive integer provided that 4 « n « 6 and 2n-3 « m
摘要:
L'invention concerne une composition à base de chlorure de méthylène stabilisé constituée essentiellement par au moins un 1,2-époxyalcane et par au moins un acétal. La composition selon l'invention est utilisable pour le dégraissage, le nettoyage et/ou le séchage des pièces métalliques.
摘要:
Producing refrigeration by evaporating the fluorocarbon refrigerants 1,1,1,2- and 1,1,2,2-tetrafluoro-2-(difluoromethoxy)ethane in the vicinity of a body to be cooled.
摘要:
On utilise le diméthoxyméthane ou le 1,3-dioxolane comme stabilisant d'une composition à base de 1,1-dichloro-1-fluoroéthane et de méthanol, destinée au nettoyage de surfaces solides.