Oil-based ink composition for writing utensils, writing utensil using same, and airbrush unit using same
AssigneeMitsubishi Pencil Company, Limited
InventorsTakayuki Ikai, Yumiko Haruhara
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Abstract
Provided are an oil-based ink composition for writing utensils, a writing utensil using the same, and an airbrush unit using the same. The oil-based ink composition for writing utensils has good writing properties on writing surfaces of various materials and improved scratch resistance to scratches repeated or to scratches with stronger force on a marking after writing. The subject oil-based ink composition for writing utensils contains at least an aluminum pigment, a colorant, a resin, an organic solvent, and a polydimethylsiloxane, the polydimethylsiloxane having polyether-modifying groups at both ends, and a total number of hydroxyl groups on the polyether-modifying groups being 3 or greater.
Claims4
An oil-based ink composition for writing utensils, comprising at least an aluminum pigment, a colorant, a resin, an organic solvent, and a polydimethylsiloxane, the polydimethylsiloxane having polyether-modifying groups at both ends, and a total number of the hydroxyl groups on the polyether-modifying groups being 3 or greater, and
- the oil-based ink composition being capable of producing a marking having metallic luster,
- wherein at least one of the polyether-modifying groups has a hyperbranched molecular skeleton having two or more and 100 or less branches,
- wherein a content of the polydimethylsiloxane is 0.005 to 10 mass % based on a total mass of the oil-based ink composition for writing utensils, and
- wherein a content of the aluminum pigment is 0.3 mass % to 25 mass % based on the total mass of the oil-based ink composition for writing utensils.
Dependencies are inferred from the claim text.