| 摘要 |
Lipstick comprising an interior part (core) and an outer part (sheath) having different compositions, wherein the core comprises at least ceramides, preferably of vegetable origin, and pyrrolidone carboxylic acid or an ester of this, and the sheath contains pigments to confer the desired colour to the lips, in association with high molecular weight hydrophobic and lipophilic polymers capable of forming an absorption network to retain the pigments on the surface of the lips, and an extract of aloe. Preferably the core part may additionally contain at least one component selected from essential wax of rose geranium, non-saponifiable karite material, glycyrrhizinic acid and derivatives, vitamins A and E and precursors and derivatives of these, and/or at least one agent to protect the lips against the effects of atmospheric pollutants and solar radiation. The protective agent is e.g. a fluorinated oil. Preferably these components make up about 9 wt. % of the core. The polymer combination in the sheath part preferably includes at least one polymer selected from polymethylmethacrylate, methylstyrene/vinyltoluene copolymer, polyethylene and polyoxypropylated dicyclohexylmethylenediisocyanate. Preferably the polymer combination makes up about 10 wt. % of the sheath. The sheath may also contain mica and/or starch. The pigments, mica and/or starch may be coated with an aminoacid capable of improving the adhesion of the lipstick film to the cutaneous surface.
|
