Composition containing 1,1-dichloro-1-fluoroethane,...

Details Composition containing 1,1-dichloro-1-fluoroethane,... Composition containing 1,1-dichloro-1-fluoroethane,...

C - Chemistry, Metallurgy

11

D

C11D 7/50 (2006.01) C23G 5/028 (2006.01) C23G 5/032 (2006.01) H05K 3/26 (2006.01)

Patent

CA 2067266

The invention concerns a compound consisting of 60% to 90% by weight of 1,1-dichloro-1-fluoroethane (F141b), 9% to 33% of 1,1,1,3,3 pentafluorobutane (F365 mfc) and 1% to 7% of methanol. These three compounds form a positive azeotrope (Boiling point=29.1 degrees C at normal pressure). The compound, once stabilized, can be used for cleaning and/or drying solid surfaces, in particular for defluxing printed circuits and degreasing mechanical parts. These uses are also aims of the invention.

L'invention concerne une composition comprenant en poids 60 à 90% de 1,1-dichloro-1-fluoroéthane (F141b), 9 à 33% de 1,1,1,3,3-pentafluorobutane (F365 mfc) et 1 à 7% de méthanol. Ces trois composés forment un azéotrope positif (Eb. = 29,1°C à la pression normale). La composition, éventuellement stabilisée, peut être utilisée pour le nettoyage et/ou le séchage de surfaces solides, en particulier pour le défluxage des circuits imprimés et pour le dégraissage de pièces mécaniques. Ces usages sont également des objets de l'invention.

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