Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations
Patent
1993-03-01
1996-08-06
Dodson, Shelley A.
Drug, bio-affecting and body treating compositions
Topical sun or radiation screening, or tanning preparations
514938, A61K 742
Patent
active
055431356
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, moisturizers 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.
Abstract: "Water-In-Oil Type Sun-Screening Cosmetic", vol. 14, No. 403 (C-753) (4346), Aug. 31, 1990.
Dodson Shelley A.
Tioxide Specialties Limited
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