Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2011-04-19
2011-04-19
Egwim, Kelechi C (Department: 1762)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C514S844000, C524S812000, C524S814000, C524S817000, C524S831000, C524S832000
Reexamination Certificate
active
07927615
ABSTRACT:
The present invention is a thickener consisting of a microgel obtained by radical polymerization of water soluble ethylene-type unsaturated monomers dissolved in the dispersion phase in a composition having an organic solvent or an oil component as the dispersion medium and water as the dispersion phase, as well as a cosmetic containing said thickener.Also, the present invention is a method of manufacturing a water-swelling polymer in a radical polymerization system consisting of a composition having an organic solvent or oil component as the dispersion medium and an aqueous solution of a water soluble ethylene type unsaturated monomer as the dispersion phase wherein said system contains a surfactant chosen in such a way that the aforementioned composition forms a single phase W/O microemulsion or fine W/O emulsion at a thermal radical polymerization temperature and said thermal radical polymerization is carried out at a temperature equal to or higher than the phase transition temperature of the radical polymerization system, yet not higher than the phase transition temperature by 20° C. or more.
REFERENCES:
patent: 4540740 (1985-09-01), Olson et al.
patent: 6197287 (2001-03-01), Mallo et al.
Kaneda Isamu
Yanaki Toshio
Egwim Kelechi C
Shiseido Company Ltd.
Townsend & Banta
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