Abstract Liquid-water displacement composition consisting essentially of a normally liquid chlorofluorocarbon having at least two carbon atoms, a boiling point of at least about 28° C., a density of at least about 1.3 grams/cc at 20° C. and a solubility parameter of less than about 8 and such an amount of surfactant dissolved therein as to impart water displacement characteristics to the composition, said surfactant being soluble in a water displacing amount in said normally liquid chlorofluorocarbon and being a tetraalkyl ammonium compound having a water extractability from the composition of not more than 30 weight %, preferably not more than 10 weight %, most preferably not more than 5 weight %, the cationic moiety of the surfactant being of the formula R.sub.m N.sup.⊕ R.sub.n ' wherein m is 2 or 3, n is 1 or 2, the sum of m and n is 4, R is C 6-18 alkyl and R' is C 1-2 alkyl, said composition having an aqueous emulsion separation time of not more than 8 minutes, preferably not more than 5 minutes, and being able to dry a standard lead frame for electronic applications to a moisture level of not more than 8.5 weight %.
Inventors
👤 Philip L. Bartlett
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-04 19:03
CPC Classifications
B; B01; B01D; B01D12/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
Liquid-water displacement composition consisting essentially of a normally liquid chlorofluorocarbon having at least two carbon atoms, a boiling point of at least about 28° C., a density of at least about 1.3 grams/cc at 20° C. and a solubility parameter of less than about 8 and such an amount of surfactant dissolved therein as to impart water displacement characteristics to the composition, said surfactant being a tetraalkyl ammonium compound in which its cationic moiety is of the formula R.sub.m N.sup.+ R.sub.n ' wherein m is 2, n is 2, R is C 8-18 alkyl and R' is C 1-2 alkyl, and in which the anionic moiety is a 60/40-40/60, by weight, mixture of ##STR10## wherein R" is C 8-18 alkyl.
Claim 2
Dependent Claim
120 words
Liquid-water displacement composition consisting essentially of a normally liquid chlorofluorocarbon having at least two carbon atoms, a boiling point of at least about 28° C., a density of at least about 1.3 grams/cc at 20° C. and a solubility parameter of less than about 8 and such an amount of surfactant dissolved therein as to impart water displacement characteristics to the composition, said surfactant being a tetraalkyl ammonium compound in which its cationic moiety is of the formula R.sub.m N.sup.+ R.sub.n ' wherein m is 2, n is 2, R is C 8-18 alkyl and R' is C 1-2 alkyl, and in which the anionic moiety is a 60/40-40/60, by weight, mixture of ##STR10## wherein R" is C 8-18 alkyl.
Claim 3
Dependent Claim
24 words
Composition of claim 1 wherein R" is a C 8 alkyl oxo alcohol moiety and the cationic moiety of the surfactant is didodecyldimethyl ammonium.
Claim 4
Dependent Claim
24 words
Composition of claim 1 wherein R" is a C 8 alkyl oxo alcohol moiety and the cationic moiety of the surfactant is dicocodimethyl ammonium.
Claim 5
Dependent Claim
24 words
Composition of claim 1 wherein R" is a C 13 alkyl oxo alcohol moiety and the cationic moiety of the surfactant is didodecyldimethyl ammonium.
Claim 6
Dependent Claim
24 words
Composition of claim 1 wherein R" is a C 13 alkyl oxo alcohol moiety and the cationic moiety of the surfactant is dicocodimethyl ammonium.