Ballpoint pen oil-based ink composition and ballpoint pens
AssigneeMitsubishi Pencil Company, Limited
InventorShuji Ichikawa
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Abstract
A ballpoint pen oil-based ink composition, comprising an ink having therein a mixture of at least one phosphoric acid ester having an acid number of 90 to 600 and at least one weakly cationic component selected from the group consisting of: a) imidazoline-type activator, b) polyoxyethylene alkylamine, c) polyoxyethylene alkylamide, and d) alkylalkanolamide.
Claims44
A ballpoint pen oil-based ink composition, comprising
- a coloring material,
- an oil-based solvent, said oil-based solvent comprising one or more compounds having the following formula:
- where R11 and R13 each is independently H or CH3, R12 is CH3,
- a polyvinyl butyral resin,
- at least one phosphoric acid ester having an acid value of 90 to 600, and
- at least one weak cationic component selected from the group consisting of:
- a) imidazoline activator,
- b) polyoxyethylene alkylamine,
- c) polyoxyethylene alkylamide, and
- d) alkylalkanolamide.
A ballpoint pen comprising an ink holder, a ballpoint pen oil—based ink composition in said ink holder, and an ballpoint pen tip provided at an end of the ink holder, wherein the ballpoint pen oil—based ink composition comprises
- a coloring material,
- an oil-based solvent, said oil-based solvent comprising one or more compounds having the following formula:
- where R11 and R13 each is independently H or CH3, R12 is CH3,
- a polyvinyl butyral resin,
- at least one phosphoric acid ester having an acid value of 90 to 600, and
- at least one weak cationic component selected from the group consisting of:
- a) imidazoline activator,
- b) polyoxyethylene alkylamine,
- c) polyoxyethylene alkylamide, and
- d) alkylalkanolamide.
Dependencies are inferred from the claim text.