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US 5,330,681 AGranted
Stable emulsions of perfluoropolyethers
AssigneeAusimont S.p.A.
InventorsFabio Brunetta, Giovanni Pantini
Life of this patent
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Abstract
Stable diphase emulsions consisting of: a) perfluoropolyethers having perfluoroalkyl end groups; b) a conventional surfactant, dispersed in c) a continuous dispersing phase consisting of glycerol or of a polyhydroxylated compound containing at least three hydroxyl groups, selected from polyalcohols and saccharides, dissolved in a hydrophile solvent and/or water.
Claims10
Stable emulsions of perfluoropolyethers having perfluoroalkyl end groups, consisting of:
- a) from 0.01% to 50% by weight of a perfluoropolyether;
- b) from 0.01% to 5% of a surfactant;
- and
- c) from 45 to 99.98% of a solution in water of a polyhydroxylated compound selected from the group consisting of polyalcohols other than glycerine and the saccharides containing at least three hydroxylic groups;
- i) said solution in water is a syrup (a concentrated solution) containing 50 to 80% by weight of the polyhydroxylated compound;
- ii) the polyhydroxylated compounds are crystalline powders soluble in water;
- iii) the surfactant is an ionic surfactant or emulsifier used for cosmetics.
4 more elements
Dependencies are inferred from the claim text.