Compositions based on 1,1,1,3,3-pentafluorobutane and methanol f

Details Compositions based on 1,1,1,3,3-pentafluorobutane and methanol f Compositions based on 1,1,1,3,3-pentafluorobutane and methanol f

1992-04-30

1993-12-07

Skane, Christine

Compositions

Water-softening or purifying or scale-inhibiting agents

252162, 252170, 252364, 252DIG9, 134 12, 134 31, 134 38, 134 40, 134 42, 203 67, C11D 730, C11D 750, C23G 5028

Patent

active

052681211

ABSTRACT:
To replace cleaning compositions based on 1,1,2-trichloro-1,2,2-trifluoroethane (F113), the invention proposes a composition comprising, by weight, 93 to 99% of 1,1,1,3,3-pentafluorobutane (F365 mfc) and 7 to 1% of methanol. These two compounds form a positive azeotrope (b.p.=36.5.degree. C. at normal pressure).
The composition, optionally stabilized, can be used for the cleaning and/or drying of solid surfaces, in particular for the removal of flux from printed circuits and for degreasing mechanical parts.

REFERENCES:
patent: 4748223 (1988-05-01), Haruyoshi et al.
patent: 4842764 (1989-06-01), Lund et al.
patent: 4943622 (1990-07-01), Naraki et al.
patent: 5059728 (1991-10-01), Li et al.
patent: 5073291 (1991-12-01), Robeck et al.
patent: 5099081 (1992-03-01), Bolmer et al.
patent: 5099082 (1992-03-01), Bolmer et al.
Copy of French Search Report dated Jan. 16, 1992.

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