Compositions: coating or plastic – Coating or plastic compositions – Marking
Patent
1998-09-28
2000-08-08
Klemanski, Helene
Compositions: coating or plastic
Coating or plastic compositions
Marking
106 3165, 106 3168, 106 317, 106 3186, 106 3195, C09D 1102
Patent
active
060996293
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a water based ink and a water based pigment ink having a metallic lustrous color for a ballpoint pen.
BACKGROUND ART
Disclosed in Japanese Patent Application Laid-Open No. Hei 7-145339 is a water based metallic lustrous color ink for a ballpoint pen which contains aluminum powder, natural polysaccharides, a water-soluble organic solvent and water and has a viscosity of 100 to 1500 poise and in which a ratio of a viscosity at 1 rpm to a viscosity at 10 rpm is 3.0 or more and in which a quality changes less even after storing over an extended period of time and a discharging property of the ink in a ball-rotating part of the tip of the ballpoint pen is good. Further, it is described therein that "in order to provide the line with a metallic lustrous color, aluminum powder as a colorant can be used in combination with known water-soluble dyes such as acidic dyes, basic dyes and direct dyes", but no specific examples are disclosed.
However, the ink described in preceding Japanese Patent Application Laid-Open No. Hei 7-145339 is made by blending 0.7 to 10 parts by weight of natural polysaccharides for thickening, 5 to 40 parts by weight of a water-soluble organic solvent and 2 to 15 parts by weight of aluminum powder. That is, consideration is given so that aluminum powder is prevented from settling by limiting the content of the natural polysaccharides for thickening, but sometimes the discharging amount is little and sometimes splitting (an amount of ink in a part where the ball contacts a paper face is so little as to cause the ink to stay only at both sides thereof and therefore the line looks two) is liable take place. Accordingly, the ink has a problem in terms of practical use.
Further, disclosed in Japanese Patent Application Laid-Open No. Hei 2-69580 is a low viscosity water based metallic color ink containing a resin emulsion, in which dispersed is a paste of an aluminum powder pigment of which surface is wetted with a solvent of a hydrocarbon mixed with an ester based wax for rust-prevention. Disclosed in Japanese Patent Application Laid-Open No. Hei 6-313142 is a water based metallic lustrous color ink using a water-soluble dye, in which the content of an inorganic salt has been set to 0.5% by weight or less. Disclosed in Japanese Patent Application Laid-Open No. Sho 63-95277 is a water based metallic color ink containing an aluminum powder pigment, an amphoteric compound, a resin emulsion, water, an organic pigment and a metallic soap. Disclosed in Japanese Patent Application Laid-Open No. Sho 58-80368 is a water based metallic color ink for writing instruments containing an aluminum powder pigment, an acrylic resin emulsion, a polyvinyl alcohol and/or cellulose based water-soluble resin and a water-dispersed type pigment.
Disclosed in Japanese Patent Application Laid-Open No. Hei 6-192610 is a water based ink composition for writing instruments containing an aluminum pigment, a water-soluble organic solvent and a perfluoroalkylphosphoric ester and/or a perfluoroalkyltrimethylammonium salt.
The ink disclosed in Japanese Patent Application Laid-Open No. Hei 6-313142 mentioned above reveals a colored metallic lustrous color by using a water-soluble dye as a colorant. However, a dye penetrates into fibers of paper when the viscosity is lower than that of the ink composition for a ballpoint pen shown in Example 2, so that the dye draws outlines around the lines of the metal powder pigment, or a colored metallic lustrous color having a sufficient intensity is not obtained, and therefore the lines tend to become drawn lines close to a silver color. When a water based colored metallic color ink was actually prepared by using aluminum powder in combination with corresponding amounts of a thickener and a colorant (yellow pigment), it was found that the ink presented a beautiful golden color and that in actual writing, a colored metallic color was developed on a paper face which scarcely absorbs an ink, such as coated paper. On the other hand, when writing
REFERENCES:
patent: 4604139 (1986-08-01), Shioi et al.
patent: 5474603 (1995-12-01), Miyashita et al.
Morita Masaaki
Tomi Hideaki
Klemanski Helene
Mitsubishi Pencil Kabushiki Kaisha
LandOfFree
Water based ink and water based pigment ink having metallic lust does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water based ink and water based pigment ink having metallic lust, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water based ink and water based pigment ink having metallic lust will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1146423