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US 6,387,984 B1Granted
Aqueous ballpoint ink composition
AssigneeSakura Color Products Corporation
InventorTadaaki Ito
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AssigneeSakura Color Products Corporation
InventorTadaaki Ito
Estimating the term…
The present invention provides an aqueous ink composition for ball-point pens comprising a titanium oxide as a white pigment, a viscosity modifier and flat-shaped resin particles. The color of the aqueous ink composition can be adjusted by coloring agents (such as a pigment). The viscosity of the aqueous ink composition is 100 cps to 20,000 cps at 20° C. The average particle diameter of said flat-shaped resin particles is 0.05 μm to 10 μm and the content thereof is 1% by weight to 35% by weight with respect to the total amount of the aqueous ink composition. The content of the titanium oxide is 5% by weight to 55% by weight with respect to the total amount of the aqueous ink composition. As a viscosity modifier, a polysaccharide is used and the content thereof is 0.1% by weight to 2% by weight with respect to the total amount of the aqueous ink composition.
An aqueous ink composition for ball-point pens comprising, titanium oxide as a white pigment, a viscosity modifier and flat-shaped resin particles, wherein said aqueous ink composition has a viscosity ranging from 100 cps to 20000 cps at 20° C. and wherein precipitation of the titanium oxide is prevented.
An aqueous ink composition for ball-point pens comprising titanium oxide as a white pigment, polysaccharide as a viscosity modifier and flat resin particles, the aqueous ink composition having a viscosity ranging from 100 cps to 20,000 cps at 20° C. and wherein precipitation of the titanium oxide is prevented.
An aqueous ink composition for ball-point pens comprising titanium oxide as a white pigment, polysaccharide as a viscosity modifier, and flat resin particles, the aqueous ink composition having a viscosity ranging from 3000 cps to 9000 cps at 20° C. and wherein precipitation of the titanium oxide is prevented.
Dependencies are inferred from the claim text.