Cleaning composition comprising 1,1,2-trichloro-1,2,2-trifluoroethane and an alcohol
AssigneeImperial Chemical Industries PLC
InventorDavid G. Hey
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Abstract
An improved cleaning composition for removal of flux from printed circuit boards consists essentially of the azeotropic mixture of 1,1,2-trichloro-1,2,2-trifluoroethane and a lower aliphatic alcohol and containing as additive an N-substituted or N,N-disubstituted amide of an aliphatic carboxylic acid wherein there is at least one hydroxyalkyl or hydroxyalkenyl substituent of up to 8 carbon atoms attached to the amide nitrogen atom.
Claims13
A cleaning composition comprising the approximate azeotropic mixture of 1,1,2-trichloro-1,2,2-trifluoroethane and a lower aliphatic alcohol and containing a cleaning-improving amount of an N-substituted or N,N-disubstituted amide of an aliphatic carboxylic acid wherein there is at least one hydroxyalkyl or hydroxyalkenyl substituent of up to 8 carbon atoms attached to the amide nitrogen atom.
Dependencies are inferred from the claim text.