Drug – bio-affecting and body treating compositions – Live skin colorant containing
Patent
1980-07-11
1982-04-06
Albrecht, Dennis L.
Drug, bio-affecting and body treating compositions
Live skin colorant containing
106291, 424 64, 424 69, 427118, 427220, 428363, 428403, A61K 7021, C09C 100, C09C 308, C09C 310
Patent
active
043235549
ABSTRACT:
Colored material-containing pearlescent pigments based on mica flakes coated with metal oxide contain as colored material, a colored aluminum lake which is fixed as a water-insoluble compound on the surface of the pigment particles, the lake being formed from a precipitated aluminum hydroxide layer, wherein the aluminum hydroxide layer forming the colored lake contains 1 to 50% by weight of a compound of the formula ##STR1## wherein X is hydroxy or carboxy, Y is hydrogen or alkyl or alkenyl of 10 to 20 carbon atoms and Z is hydrogen, or alkyl or alkenyl of 10 to 20 carbon atoms, or the grouping ##STR2## said compound having a molecular weight of at least 150 and a solubility in water at a pH of 5-9 of at least 0.05 g/l, and said compound being precipitated onto the flakes together with the aluminum hydroxide layer. A process for the production of these pigments is also provided, as are cosmetics containing them.
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Albrecht Dennis L.
Merck Patent Gesellschaft mit beschrankter Haftung
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