Compositions – Water-softening or purifying or scale-inhibiting agents
Patent
1991-02-07
1994-05-03
Skaling, Linda
Compositions
Water-softening or purifying or scale-inhibiting agents
134 12, 134 31, 134 38, 134 40, 134 42, 252153, 252162, 252170, 252364, 252DIG9, C11D 730, C11D 750, C23G 5028, H05K 326
Patent
active
053085280
ABSTRACT:
For replacing cleaning compositions based on 1,1,2-trichloro-1,2,2-trifluoroethane (F113), the invention provides a composition comprising 55 to 80% by weight of 1,1-dichloro-1-fluoroethane (F141b) and 45 to 20% by weight of methyl formate. These two compounds form a positive azeotrope (b.p.=28.4.degree. C. at atmospheric pressure).
The composition, which may be stabilized, can be used for cleaning solid surfaces, in particular for removing flux from printed circuits and for degreasing mechanical parts.
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Derwent Abstract of PCT publication WO 9113966 Sep. 1991.
Desbiendras Daniel
Martin Jean-Jacques
Michaud Pascal
Skaling Linda
Societe Atochem
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