Title: Powdery pearlescent pigment compositions

Abstract: Powdery pearlescent pigment compositions comprising individual particles of a flaky pearlescent pigment coated with 1 to 50 weight percent of a solid polymer, optionally containing wetting agents, fillers, additional coloring agents, UV-absorbers or scenting agents, are produced by combining a suspension of a flaky pearlescent pigment with a solution of a polymer, possibly containing other substances, and subsequently depositing polymer on the pigment flakes. The compositions can be used as pigments in cosmetics and can be stored and shipped as dry powders without loss of properties.

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Inventors: Hesse, Reiner (Darmstadt, DE, US)
Pratzer, Hans (Darmstadt, DE, US)
Kieser, Manfred (Darmstadt, DE, US)
Edler, Gerhard (Darmstadt, DE, US)

Application Number: 918239
Filing Date: 1978-06-23
Publication_date: 1980-06-03
Assignee: Merck Patent Gesellschaft mit beschrankter Haftung (Darmstadt, DE)
Primary Class(es): 524/548 106/418, 428/407, 524/555, 524/577, 524/584, 524/586, 524/611
Other Classes:
US Patent Ref:

2332220	Nov, 1939	Harshberger	106/291.
3080258	Mar, 1963	Davis	106/308.
3379674	Apr, 1968	Jakob et al.	106/291.
3492253	Jan, 1970	Katz et al.	106/308.
3773708	Nov, 1973	Takahashi et al.	106/308.
3819566	Jun, 1974	Pinsky et al.	106/308.
3897586	Jul, 1975	Coker	428/407.
3904562	Sep, 1975	Hopfenberg et al.	106/308.
3920603	Nov, 1975	Stayner et al.	106/291.

Other Refs:
Primary Examiner: Gantz, Delbert E.
Assistant Examiner: Bell, Mark
Attorney: Millen & White