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US 6,281,184 B1Granted
Cleaning or drying compositions based on 43-10mee and on trichloroethylene
AssigneeAtofina
InventorsPascal Michaud, Jean-Jacques Martin
Life of this patent
Estimating the term…
Abstract
Compns. based on azeotropic or quasi-azeotropic mixts. of trichloroethylene and 1,1,1,2,3,4,4,5,5,5-decafluoropentane are useful for replacing CFC or HCFC in cleaning and degreasing of surfaces (e.g., defluxing of printed circuits) and drying of surfaces. The ability of these compns. to dry surfaces is improved by addn. of RCONR(CH2)nNHCOR surfactants (R=C14-22 alkyl, n=1-5).
Claims23
Azeotropic or near-azeotropic compositions comprising:
- from 80 to 99% of 1,1,1,2,3,4,4,5,5,5-decafluoropentane,
- from 1 to 20% of trichloroethylene,
- from 0 to 10%, of a compound A selected from methanol, ethanol, isopropanol and methylal.
Dependencies are inferred from the claim text.