Aqueous ink composition for writing instrument, and writing instrument
AssigneeMitsubishi Pencil Company, Limited
InventorYusuke NAKATA
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Abstract
An aqueous ink composition for a writing instrument may form a uniform coating film with low glossiness and is excellent in scratch resistance and water-resistant adherence even when writing is performed on a non-absorbing surface, and a writing instrument. Such an aqueous ink composition may include at least a coloring material, a neutralized product of an isobutylene-maleic anhydride copolymer, a polyol having two or more OH groups, a water-soluble resin and/or a resin emulsion, and water.
Claims14
An aqueous ink composition suitable for a writing instrument, the aqueous ink composition comprising:
- a coloring material;
- a neutralized product of an isobutylene-maleic anhydride copolymer;
- a polyol comprising a first OH group and a second OH group;
- a water-soluble resin and/or a resin emulsion;
- and
- water.
An aqueous ink composition suitable for a writing instrument, the aqueous ink composition comprising:
- a coloring material;
- a neutralized product of an isobutylene-maleic anhydride copolymer;
- a water-soluble resin and/or a resin emulsion;
- and
- water,
- wherein an acid value of a resin in the water-soluble resin and the resin emulsion is 240 or less.
Dependencies are inferred from the claim text.