Compositions – Fluent dielectric – N-containing
Patent
1979-09-04
1981-12-01
Willis, Jr., P. E.
Compositions
Fluent dielectric
N-containing
252153, 252171, 252172, C11D 752, C11D 344, C11D 332
Patent
active
043035582
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.
REFERENCES:
patent: 2969329 (1961-01-01), Heininger
patent: 2999816 (1961-09-01), Bennett et al.
patent: 3240715 (1966-03-01), Foley
patent: 3337471 (1967-08-01), Levy et al.
patent: 3340199 (1967-09-01), Clay et al.
patent: 3503891 (1970-03-01), Schimbor
Imperial Chemical Industries Limited
Willis, Jr. P. E.
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