Compositions and processes for drying substrates
AssigneeE. I. Du Pont de Nemours and Company
InventorKenneth T. Dishart
Life of this patent
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Abstract
Novel surfactants and drying and/or cleaning compositions containing such surfactants are disclosed. The surfactants are 1:1 primary or secondary amine salts of .gamma..omega.-perfluoro-C.sub.6 -C,.sub.8 -alkyl dihydrogen phosphates and bis(y,co-perfluoro-C.sub.6 -Cis-alkyl) hydrogen phosphates. The surfactants are soluble in, and convert halocarbons, especially HFC 43-10mee (1,1,1,2,2,3,4,5,5,5-decafluoropentane), into highly effective displacement drying and/or cleaning compositions. These compositions have the ability to remove water or aqueous films from the surface of a broad range of substrates.
Claims13
A composition comprising at least one halocarbon solvent and from about 50 to about 5000 parts-per-million by weight of a surfactant composition dissolved therein, said surfactant composition comprising surfactant represented by the formulae:
- ##STR5## or any combination thereof, wherein M is .sup.+ NH.sub.3 R or .sup.+ NH.sub.2 RR', R and R' are independently selected from C.sub.4 to C.sub.22 normal or branched chain alkyl radicals, and v, w, x, y, and z are independently selected from 2 to 8.
A dewatering and cleaning composition comprising HFC 43-10mee (1,1,1,2,2,3,4,5,5,5-decafluoropentane) and dissolved therein, from about 50 to about 5000 parts per million by weight, of a surfactant composition of the formulae:
- ##STR6## or any combination thereof, wherein R is selected from C.sub.12 to C.sub.14 hydrocarbon radicals containing at least one tertiary carbon, and v, w, x, y, and z are independently selected from 2 to 5.
Dependencies are inferred from the claim text.