C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 11/18 (2006.01) B43K 7/00 (2006.01) B43K 7/02 (2006.01)
Patent
CA 2499646
An oil-based ink composition for a ballpoint pen which comprises a colorant, a resin and a solvent selected from among an alcohol having a vapor pressure at 25~C of 0.001 mmHg or higher, a polyhydric alcohol and a glycol ether as a main solvent accounting for 50 % or more of the total solvent, and satisfies at least one of the following (a) to (C): (a) further comprises a neutralized product of a phosphate ester and polypropylene glycol; (b) further comprises a chemical substance represented by the following formula (1) or (2): (1) wherein R represents an alkyl group having 10 to 30 carbon atoms, or (2) wherein R represents an alkyl group having 10 to 30 carbon atoms; and (c) comprises, as the above main solvent accounting for 50 % or more of the total solvent, a solvent selected from among an alcohol having no aromatic ring in the molecular structure thereof, a polyhydric alcohol and a glycol ether, and further comprises a neutralized mixed product of a phosphate ester and an additional solvent selected from among an alcohol having an aromatic ring, a polyhydric alcohol and a glycol ether in an amount of 0.1 to 15 wt % relative to the total amount of the ink composition; and a ballpoint pen using the oil- based ink composition. The ink composition allows the suppression of the blur in the beginning of writing and can provide a feeling of writing excellent in softness and smoothness.
L'invention porte sur une encre à base d'huile pour stylo à bille comprenant: (i) un colorant; (ii) une résine; et (iii) un solvant choisi parmi: un alcool présentant une tension de vapeur de 0,001 mmHg ou plus à 25 ·C et un alcool polyhydrique; (iii) et en tant que solvant principal représentant 50 % ou plus du total des solvants, un éther glycol satisfaisant au moins aux conditions (a) à (c) suivantes: (a) comportant en outre un neutralisant d'ester phosphorique et de polypropylène glycol; (b) comportant en outre une substance chimique de formule (I) dans laquelle R représente un groupe alkyle à 10 à 30 atomes de C, ou de formule (2) dans laquelle R représente un groupe alkyle à 10 à 30 atomes de C; et (c) comportant en tant que solvant principal représentant 50 % ou plus du total des solvants, un solvant choisi parmi: un alcool dont la structure moléculaire est exempte de cycle aromatique, un alcool polyhydrique, ou un éther glycol; et (iv) un neutralisant mixte composé d'un ester phosphorique et d'un solvant additionnel choisi parmi un alcool à cycle aromatique, un alcool polyhydrique, et un éther glycol à raison de 0,1 à 15 % en poids du total de l'encre. L'invention porte également un stylo à bille utilisant ladite encre qui élimine les bavures de début d'écriture et procurant une sensation excellente de douceur et de lissé.
Ichikawa Shuji
Shoji Miyuki
Borden Ladner Gervais Llp
Mitsubishi Pencil Co. Ltd.
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