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Aqueous ink composition for ballpoint pen

A water-based ink and ballpoint pen technology, applied in the directions of ink, application, household appliances, etc., can solve the problems of insufficient drawing line concentration, deterioration of drawing line drying, etc., and achieve the effect of good storage stability and water resistance.

Inactive Publication Date: 2012-09-12
MITSUBISHI PENCIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This ink can increase the color density and change the color tone with a high degree of freedom. At the same time, since it is necessary to contain coloring materials such as dyes in the oily phase in order to obtain water resistance, there is a problem that the dryness of the drawing is deteriorated when the emulsion concentration is high. In addition, There is also a problem that the drawing line concentration is insufficient when the emulsion concentration is low

Method used

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  • Aqueous ink composition for ballpoint pen
  • Aqueous ink composition for ballpoint pen
  • Aqueous ink composition for ballpoint pen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0091] For Examples 1 to 10, the preparation of the ink composition was carried out as follows.

[0092] First, while stirring the oily solution components described in Table 1, it was heated to a temperature of 50° C. to 60° C. to completely dissolve these components. The viscosity of the oily solution in the table is the value of the solution. On the other hand, differently, the emulsifier described in Table 2 was dissolved in purified water while being stirred, and an emulsifier aqueous solution was produced. In addition, when blending the emulsifier with strong orientation to an oily phase, you may add to this oily solution and stir at normal temperature.

[0093] Next, the aqueous emulsifier solution was slowly added to the oily solution while stirring, thereby changing the phase from W / O to O / W to obtain an oil-in-water emulsion. Thereafter, an emulsification treatment was performed using a commercially available high-pressure homogenizer until reaching a predetermined...

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Abstract

Provided is a novel aqueous ink composition for ballpoint pens, which has the advantages of both aqueous ballpoint pens and oil-based ballpoint pens. The ink composition for aqueous ballpoint pens contains, in a manner such that the oil emulsifies in the aqueous phase, a colorless oil-based phase, which has a viscosity of 300 to 500,00mPas when the sheer rate is 38 / sec, in relation to a colored aqueous phase containing a pigment dispersion, a water-soluble dye, or a mixture thereof.

Description

technical field [0001] The present invention relates to an aqueous ink composition for a ballpoint pen, and more particularly to an aqueous ink composition for a ballpoint pen comprising a colored aqueous phase and an uncolored oily phase in the form of an oil-in-water emulsion. Background technique [0002] The characteristics of water-based ballpoint pens using water-based ink include low viscosity, large amount of ink outflow, and clear lines with very light pen movement. On the contrary, it generally has a feeling of being unsmooth in pen movement. , The nib is dry, and it is easy to cause the disadvantage of being unable to write. Oil-based ballpoint pens using oil-based inks have the advantages of no unsmooth feeling when writing and less bleeding in tracing lines due to their high ink viscosity and less ink outflow, but they often have a heavy pen feel. [0003] In recent years, oil-based ballpoint pens have also been developed to reduce the viscosity of oil-based in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/18C09D11/17
CPCC09D11/18
Inventor 川北美裕
Owner MITSUBISHI PENCIL CO LTD
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