Weather-resistant, pearlescent pigment and process for producing the same in the presence of hypophosphite

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5223034
SERIAL NO

07696268

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention relates to a weather-resistant, pearlescent pigment which comprises mica flakes coated with a metal oxide as base material, (a) hydrated zirconium oxide formed by hydrolysis of a zirconyl compound in the presence of a hypophosphite, and (b) a hydrated metal oxide (or oxides) formed by hydrolysis of a water-soluble compound (or compounds) of at least one member selected from the group consisting of cobalt, manganese and cerium, said components (a) and (b) being deposited on the surface of said base material.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MERCK PATENT GMBHDARMSTADT2218

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nitta, Katsuhisa Fukushima, JP 18 224
Suzuki, Isao Funabashi, JP 147 1467

Cited Art Landscape

Patent Info (Count) # Cites Year
 
THOMAS JEFFERSON UNIVERSITY (1)
* 4457784 Green nacreous pigments having calcined Cr oxide and phosphate layer, their preparation, and use 20 1982
 
El-Chem Corporation (1)
* 4525425 Water and oil repellent metal oxide-organic combination coating systems and method of making same 19 1981
 
MERCK PATENT GMBH (4)
* 4565581 Nacreous pigments having improved light fastness, their preparation and use 26 1982
* 4482389 Nacreous pigments 21 1983
* 5022923 Pearl luster pigments stable to glaze and enamel 18 1986
* 4828623 Water resistant nacreous pigment and process for producing the same 19 1987
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
ECKART GMBH (2)
8197591 Pearlescent pigments having a secondary coating comprising α-silanes and method for the production thereof 3 2007
* 2009/0249,979 PEARLESCENT PIGMENTS HAVING A SECONDARY COATING COMPRISING ALPHA-SILANES AND METHOD FOR THE PRODUCTION THEREOF 9 2007
 
ENGELHARD CORPORATION (3)
* 5759255 Pearlescent pigment for exterior use 47 1997
* 5951750 Anti-yellowing polyolefin compositions containing pearlescent pigment to prevent yellowing and method therefore 5 1997
* 6139615 Pearlescent pigments containing ferrites 16 1998
 
BASF SE (1)
* 2010/0178,308 SURFACE-MODIFIED (EFFECT) PIGMENTS 8 2007
 
NIPPON SHEET GLASS CO., LTD. (8)
9045643 Bright pigment, method for producing the pigment, and waterborne resin composition containing the pigment 0 2007
8273171 Pearlescent pigment 0 2007
* 2010/0249,304 PEARLESCENT PIGMENT 5 2007
9107834 Bright pigment and cosmetic composition using the same 0 2008
* 2010/0129,412 BRIGHT PIGMENT AND COSMETIC COMPOSITION USING THE SAME 9 2008
8440014 Bright pigment, and bright coating composition and automotive body coating each containing the same 0 2008
* 8409708 Bright pigment 0 2008
* 2010/0227,181 BRIGHT PIGMENT 6 2008
 
MERCK PATENT GMBH (8)
* 5472491 Pearlescent pigment for water-borne surface-coating systems 36 1994
* 6176918 Modified nacreous luster pigments for water paint systems 50 1998
7160374 Flaky pigments coated with a coupling agent and a perfluoroalkyl phosphate 3 2001
* 6858072 Surface-modified pearl pigment and process for producing the same 5 2002
* 2004/0069,187 Flaky pigments coated with a coupling agent and a perfluoralkyl phosphate 1 2003
* 7241503 Iridescent pigment having high brilliance and high chroma 14 2003
* 2004/0166,316 Iridescent pigment having high brilliance and high chroma 1 2003
RE41858 Pearlescent pigment for water-borne surface-coating systems 0 2009
 
SHISEIDO COMPANY, LTD. (1)
7022409 Pleochroism powder and pleochroism printed article 0 2002
* Cited By Examiner