Water-in-oil emulsions

Details Water-in-oil emulsions Water-in-oil emulsions

1995-05-30

1997-02-18

Dodson, Shelley A.

Compositions

Inorganic luminescent compositions

Tungsten containing

252314, 424 59, 514937, 514938, B01J 1300, A61K 742

Patent

active

056038631

ABSTRACT:
The invention concerns a process for producing a water-in-oil emulsion comprising mixing an oil dispersion of particles of a metallic oxide having a primary particle size less than 0.2 micron with one or more emulsifiers and an aqueous phase.
The method enables the production of such emulsions containing relatively small quantities of emulsifiers and a novel emulsion made available by the invention contains less than 1% by weight of emulsifiers, 10 to 60% by weight of an oil phase and at least 40% by weight of an aqueous phase.
The emulsions so formed are useful in preparing UV absorbing compositions such as sunscreens, skin protectants, moisturisers and after-sun lotions.

REFERENCES:
patent: 4731242 (1988-03-01), Palinczar
patent: 4820508 (1989-04-01), Wortzman
patent: 4917883 (1990-04-01), Strobridge
patent: 5000937 (1991-03-01), Grollier et al.
patent: 5028417 (1991-07-01), Bhat et al.
patent: 5041281 (1991-08-01), Strobridge
patent: 5093109 (1992-03-01), Mausner
patent: 5169624 (1992-12-01), Ziegler et al.
patent: 5207998 (1993-05-01), Robinson et al.
patent: 5208012 (1993-05-01), Sudo et al.
patent: 5250289 (1993-10-01), Boothroyd et al.
patent: 5443759 (1995-08-01), Dahms

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