Cleaning composition based on 1,1,1,2,2-pentafluoro-3,3-dichloro

Details Cleaning composition based on 1,1,1,2,2-pentafluoro-3,3-dichloro Cleaning composition based on 1,1,1,2,2-pentafluoro-3,3-dichloro

1991-05-10

1992-04-07

Clingman, A. Lionel

Compositions

Water-softening or purifying or scale-inhibiting agents

134 12, 134 31, 134 38, 134 39, 134 40, 252153, 252162, 252170, 252364, 252DIG9, C11D 730, C11D 750, C23G 5028, B08B 300

Patent

active

051025639

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 1,1,1,2,2-pentalfuoro-3,3-dichloropropane (225ca) and 20 to 45% by weight of methyl tert-butyl ether.
These two compounds form a negative azeotrope (b.p.=59.9.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.

REFERENCES:
patent: 3804769 (1974-04-01), Lomas
patent: 4947881 (1990-08-01), Magid et al.
patent: 4961869 (1990-10-01), Eggers et al.
patent: 4970013 (1990-11-01), Merchant

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