Stable acidic oil-in-water type emulsions and compositions conta

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice

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514937, 514938, 514939, 514847, 252304, A61K 700, A61K 910

Patent

active

055319939

ABSTRACT:
Oil-in-water type emulsions having a pH below or equal to 3.5, especially a pH below or equal to 3, and comprising as a stabilizing agent a substantially water-soluble crosslinked anionic copolymer consisting of units derived from the reaction between (i) acrylamide, (ii) 2-acrylamido-2-methylpropanesulfonic acid and (iii) at least one compound possessing multiple olefinic unsaturation (crosslinking agent), in which the compound possessing multiple olefinic unsaturation is present in the copolymer at a concentration of between 0.06 and 1 mmol per mole of the collective monomer units, are stable.

REFERENCES:
patent: 4059552 (1977-11-01), Zweigle
patent: 4459396 (1984-07-01), Yamasaki
patent: 4710374 (1983-12-01), Grollier
patent: 5292800 (1994-03-01), Moench

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