US Patent No: 5,972,098

Number of patents in Portfolio can not be more than 2000

Titanate-containing pearlescent pigments

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Abstract

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Single-layer or multilayer titanate-containing pearlescent pigments comprising iron titanate and, if appropriate, titanium oxide and/or iron oxide, which is obtainable by solidification of an aqueous solution of a thermally hydrolysable titanium compound on a continuous belt, detachment of the layer formed, coating of the resulting titanium dioxide platelets, after or without intermediate drying, with iron oxide in a wet process, and drying and calcining of the resulting material in an oxidizing or reducing gas atmosphere at not less than 500.degree. C., the layer thicknesses of the titanium dioxide layer and iron dioxide layer being adjusted such that either the stoichiometric ratio between iron oxide and titanium dioxide necessary for the formation of pseudo-brookite or ilmenite is obtained or an excess of iron oxide or titanium dioxide is present.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MERCK PATENT GMBHDARMSTADT1923

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Andes, Stefanie Maintal, DE 3 103
Brenner, Gunter Griesheim, DE 13 156
Bruckner, Dieter Unterleiterbach, DE 28 233
Heyland, Andrea Reichelsheim, DE 17 211
Hock, Sabine Schaafheim, DE 2 19
Kuntz, Matthias Seeheim-Jugenheim, DE 78 552
Osterried, Karl Dieburg, DE 23 268
Pfaff, Gerhard Muenster, DE 82 672
Schmelz, Michael Griesheim, DE 28 179

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MERCK PATENT GMBH (2)
* 4,744,832 Iron oxide coated perlescent pigments 33 1986
* 5,009,711 Golden color luster pigments 19 1988
 
BASF AKTIENGESELLSCHAFT (1)
* 4,344,987 Preparation of flaky mica pigments coated with metal oxides, and use of these pigments 34 1981
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
BASF CORPORATION (1)
6,663,951 Two layer coating system having an enhanced visual effect 2 2000
 
SABIC INNOVATIVE PLASTICS IP B.V. (1)
* 6,376,075 Article having reflecting coating and process for the manufacture 27 2000
 
Nihon Koken Kogyo KK (2)
8,016,934 Pearlescent pigment 0 2005
8,153,163 Pearlescent pigment 0 2011
 
MERCK PATENT GMBH (6)
* 6,280,520 Multilayer pearl luster pigment based on an opaque substrate 20 1999
* 6,284,032 Multilayer interference pigments 13 2001
* 6,767,633 Transparent medium having angle-selective transmission or reflection properties and/or absorption properties 9 2002
* 7,611,574 Interference pigment with a high covering power 0 2004
* 8,940,189 Intensely coloured and/or optically variable pigments having an electrically conductive core 0 2008
* 2010/0270,510 INTENSELY COLOURED AND/OR OPTICALLY VARIABLE PIGMENTS HAVING AN ELECTRICALLY CONDUCTIVE CORE 1 2008
 
TOKAN MATERIAL TECHNOLOGY CO., LTD. (1)
6,540,824 Titanium-iron based composite oxide pigment and method for production thereof 1 2002
* Cited By Examiner