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Title:
PIGMENT MIXTURE
Document Type and Number:
Japanese Patent JP2000345096
Kind Code:
A
Abstract:

To obtain a pigment mixture which has a relatively high hiding power, is incorporated well into a system wherein the mixture is used, and is considerably prevented from causing pigment/colorant separation in the system by mixing an ingredient containing a multilayer pigment (e.g. mica) with an ingredient containing a platy, needle-like, or spherical colorant and/or a filler.

This mixture contains an ingredient (A) containing a multilayer pigment based on mica, SiO2 flakes, glass flakes, Al2O3 flakes, or polymer flakes and an ingredient (B) containing a platy, needle-like, or spherical colorant and/or a filler. The mixing ratio of ingredient A to ingredient B is preferably (10/1)-(1/10). Preferably, ingredient A is a multilayer pigment based on aforementioned substrate flakes coated alternately with a highrefractive-index metal oxide layer and a low-refractive-index metal oxide layer. Preferably, the high- refractive-index layers comprises at least one layer selected from a TiO2 layer, an Fe2O3 layer, a ZnO layer, and a ZnO2 layer; and the low-refractive-index layer comprises at least one layer selected from an SiO2 layer and an Al2O3 layer.


Inventors:
PFAFF GERHARD
ANSELMANN RALF DR
SCHOEN SABINE
Application Number:
JP2000113141A
Publication Date:
December 12, 2000
Filing Date:
April 14, 2000
Export Citation:
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Assignee:
MERCK PATENT GMBH
International Classes:
A61K8/00; A61K8/02; A61K8/11; A61K8/25; A61K8/26; A61K8/27; A61K8/28; A61K8/29; A61K8/49; A61K8/72; A61K8/19; A61Q1/00; A61Q1/04; A61Q1/06; A61Q1/10; A61Q19/10; C08K7/00; C08K9/00; C08L101/00; C09B67/00; C09B67/22; C09C1/00; C09D5/36; C09D7/12; C09D11/00; C09D11/02; C09D17/00; C09D201/00; (IPC1-7): C09D17/00; A61K7/00; A61K7/025; A61K7/032; A61K7/50; C08K9/00; C08L101/00; C09D7/12; C09D11/00; C09D201/00
Domestic Patent References:
JPH1036734A1998-02-10
JPH06228456A1994-08-16
Foreign References:
WO1998053012A11998-11-26
WO1998053011A11998-11-26
WO1998038254A11998-09-03
WO1998012266A11998-03-26
Attorney, Agent or Firm:
Nobuyuki Kaneda (2 others)