Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Reexamination Certificate
2011-08-23
2011-08-23
Le, Hoa (Holly) (Department: 1788)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
C428S331000, C428S339000, C428S404000
Reexamination Certificate
active
08003213
ABSTRACT:
Composite particles, wherein each particle contains titanium oxide, a first covering layer containing cerium oxide and a second covering layer containing silicon oxide in this order from the inside, and wherein the amount of cerium oxide is from 3 to 30 parts by mass based on 100 parts by mass of titanium oxide, the amount of silicon oxide is from 5 to 60 parts by mass based on 100 parts by mass of titanium oxide, and the average particle size of the composite particles is from 0.15 to 3 μm. The composite particles suppress discoloration, decomposition and photocatalytic reaction of titanium oxide by ultraviolet rays and show excellent resistance against hydrogen fluoride. Discoloration, changes in visible light transmittance, and decreases in the mechanical strength of coating compositions, printing inks, and resin films coated with printing inks containing the composite particles are suppressed for long periods of time.
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Asahi Glass Company Limited
Le Hoa (Holly)
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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