Title:
OIL-BASED INK FOR BALLPOINT PEN
Document Type and Number:
Japanese Patent JP2009108272
Kind Code:
A
Abstract:
To provide an oil-based ink for ballpoint pens, which prevents clogging due to the sedimentation of a pigment with time even if the pigment is used as a colorant.
The oil-based ink for ballpoint pens comprises at least a pigment, a copolymer having a constitutive unit comprising at least a monomer having a carboxylic acid group in the molecule, an organic solvent, and a crosslinking-type poly(N-vinyl carboxylic amide).
Inventors:
Takagishi, Ikuo
Yasuike, Kiyonori
Yasuike, Kiyonori
Application Number:
JP2007000284611
Publication Date:
May 21, 2009
Filing Date:
October 31, 2007
Export Citation:
Assignee:
PENTEL CORP
International Classes:
C09D11/18; C09D11/18