Cleaning substance containing 1,1-dichloro-1-fluoroethane...

C - Chemistry – Metallurgy – 11 – D

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C11D 7/50 (2006.01) C23G 5/028 (2006.01) H05K 3/26 (2006.01) C11D 7/26 (2006.01) C11D 7/28 (2006.01)

Patent

CA 2035363

PRECIS DE LA DIVULGATION: Pour remplacer les compositions de nettoyage à base de 1,1,2-trichloro-1,2,2-trifluoroéthane (F113), l'inven- tion propose une composition comprenant en poids 55 à 80% de 1,1-dichloro-1-fluoroéthane (F141b) et 45 à 20% de formiate de méthyle. Ces deux composes forment un azéotrope positif (Eb. = 28,4°C à la pression normale). La composition, éventuellement stabilisée, peut être utilisée pour le nettoyage de surfaces solides, en particulier pour le défluxage des circuits imprimés et pour le dégraissage de pièces mécaniques.

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