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Water-based ink composition for writing instruments

一种水基墨水、组合物的技术，应用在油墨、应用、家里用具等方向，能够解决墨水组合物书写感觉、非羽毛状性质和画线干燥性质较差等问题，达到非羽毛状性质和画线干燥性质优异、老化稳定性优异的效果

Inactive Publication Date: 2006-08-02
MITSUBISHI PENCIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the ballpoint pen water-based pigment ink composition described in the above Japanese Patent Application Laid-Open No. 186730 / 1990, the purpose of the aforementioned polyhydric alcohol alkylene oxide adduct with no fatty acid bound as a hydrophobic group is to improve the lubricity, and Therefore the ink composition is still inferior in terms of writing feel, non-feathering properties and line drying properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 13 and comparative Embodiment 1 to 6

[0098] Compounds having respective physical properties (average molecular weight, HLB, and degree of esterification) shown in Table 1 below were used as alkylene oxide-added glycerides and the like. HLB was calculated according to the Griffin equation above.

[0099] Next, each water-based ink composition for writing equipment was obtained according to each formulation shown in Table 2 and Table 3 below.

[0100] The ink viscosity and pH of each of the water-based ink compositions for writing instruments thus obtained were measured by the following measurement methods.

[0101] Next, writing instruments having the following specifications were filled with each of the water-based ink compositions for writing instruments obtained above.

[0102] (1) Free ink direct storage type ballpoint pen (UB-157, ball diameter φ: 0.7 mm; manufactured by Mitsubishi Pencil Co., Ltd.): Examples 1, 3 to 6 and 11 to 13 and Comparative Examples 1 and 3

[0103] (2) Sliver type marking pen (PM-1...

Embodiment 2 and 7 and comparative Embodiment 4

[0106] Five writing instruments each having the above specifications were assembled in the above-mentioned Examples and Comparative Examples, and evaluated for their feathery properties (non-feathery properties), writing feeling, line-drawing drying properties, and aging stability.

[0107] The results are shown in Tables 2 and 3 below.

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Abstract

Provided is a water-based ink composition for a writing instrument comprising at least a colorant and water, characterized by comprising an alkylene oxide-added glycerin ester in which a principal skeleton is glycerin and 60 to 150 moles of alkylene oxide is added thereto and in which the glycerin is ester-bonded with a carboxylic acid-containing substance in an amount of 0.1 to 30% by weight based on the total amount of the ink composition.

Description

technical field [0001] The present invention relates to a water-based ink composition for writing equipment, and more particularly to a water-based ink composition for writing equipment excellent in non-feathering properties, writing feeling and stability of physical properties . Background technique [0002] When preparing water-based inks for writing equipment, particularly when preparing inks falling in the low viscosity region (50 mPa·s or less: measured by an ELD type viscometer (25° C.) produced by Tokimec Inc.), because Unpredictable non-feather properties, the kind and amount of addition of materials with a high penetration rate in paper (such as low molecular weight surfactants) have hitherto been limited. [0003] Specifically, in specifications requiring metal lubrication between the ball and the tip holder, such as in ballpoint pens, the addition of surfactants is necessary. However, adding surfactants in amounts sufficient for metal lubrica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/16C09D11/17
CPCC09D11/18C09D11/16
Inventor 生驹英行小林雄介
Owner MITSUBISHI PENCIL CO LTD
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