Composition based on 1,1,1,3,3-pentafluorobutane and methylene c

Details Composition based on 1,1,1,3,3-pentafluorobutane and methylene c Composition based on 1,1,1,3,3-pentafluorobutane and methylene c

1993-07-07

1994-09-20

Skaling, Linda

Compositions

Water-softening or purifying or scale-inhibiting agents

134 12, 134 31, 134 40, 134 42, 252153, 252162, 252194, 252364, 252DIG9, C11D 732, C11D 750, C23G 5028, B08B 300

Patent

active

053486811

ABSTRACT:
To replace cleaning compositions based on 1,1,2-trichloro-1,2,2-trifluoroethane (F113), the invention provides a composition comprising, by weight, 30 to 70% 1,1,1,3,3-pentafluorobutane (F365-mfc) and 70 to 30% methylene chloride. These two compounds form a positive azeotrope (B.p.=33.6.degree. C. at normal pressure).
The composition, optionally stabilized, can be used for the cleaning and/or the drying of solid surfaces, in particular for removing flux from printed circuits and for degreasing mechanical components.

REFERENCES:
patent: 5099081 (1992-03-01), Bolmer et al.
patent: 5099082 (1992-03-01), Bolmer et al.
patent: 5250208 (1993-10-01), Merchant et al.
patent: 5268120 (1993-12-01), Michaud
patent: 5268121 (1993-12-01), Michaud
patent: 5275669 (1994-01-01), Van der Puy et al.

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