JP2001226622A - Water-based ink for ball point pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink having high non-dry property and good writing feeling, not preventing recycle because of being harmless to the human bodies. SOLUTION: In this water-based ink for ball point pen comprising at least a coloring agent and water, the water-based ink for ball point pen is characterized by compounding one or more kinds of substances selected from the group consisting of a rice bran fatty acid, rice bran extracted oil, unpolished rice and malt oil and γ-orizanol therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink for a water-based ballpoint pen, in which the pen tip is hard to dry and has a good writing feel.

[0002]

2. Description of the Related Art In the field of water-based ballpoint pens, it has been a problem to develop an ink which hardly dries the nib (that is, has high non-dryness) and gives a smooth feel when writing. Many proposals have been made (JP-A-62-101672, JP-A-63-22).
No. 3077). On the other hand, in recent years, from the viewpoint of product safety and recycling, ink components used in water-based ballpoint pens have been required to be safe and easy to recycle.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide an ink which has high non-dryness and good writing feeling, and which is harmless to the human body and does not hinder recycling.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in view of the above-mentioned circumstances, and as a result, have been able to satisfy the above-mentioned requirements by blending specific natural components derived from grasses and the like into ink. It was found that a water-based ballpoint pen ink was obtained, and the present invention was completed.

That is, the present invention provides an aqueous ballpoint pen ink containing at least a colorant and water.
The present invention relates to an aqueous ballpoint pen ink characterized by containing rice bran fatty acid in an amount of 0.1 to 10% by weight based on the total amount of the ink (hereinafter, may be referred to as "first invention").

Further, the present invention provides an aqueous ballpoint pen ink containing at least a colorant, water and a nonionic surfactant having an HLB of 7 to 13, comprising a rice bran fatty acid, a rice bran extracted oil, a brown rice malt oil and a γ. One or more selected from the group consisting of oryzanols in an amount of from 1 to 25
Water-based ink for ballpoint pens, characterized in that it is blended in a range of weight% (hereinafter, sometimes referred to as "second invention").

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a predetermined amount of a component selected from rice bran fatty acid, rice bran extracted oil, brown rice malt oil and γ-oryzanol (hereinafter sometimes referred to as “rice bran component”) is contained in the ink. Things.

[0008] The rice bran fatty acid used in the present invention is a fatty acid extracted, separated and purified from rice bran crude oil, and contains fatty acids such as oleic acid and linoleic acid as main components. By adding rice bran fatty acid, it is possible to improve the writing feeling, reduce the wear of the ball seat, and improve the non-dryness. In the present invention, as rice bran fatty acids, for example, commercially available products such as Oriza fatty acid I, Oriza fatty acid R, and Oriza fatty acid T (all trade names; manufactured by Oriza Yuka Co., Ltd.) can be advantageously used.

Further, rice bran extracted oil is oil and fat extracted and purified from brown rice malt oil, and brown rice malt oil is extracted and refined from brown rice malt crude oil, and γ-oryzanol is a natural component extracted from rice bran crude oil or rice malt oil. is there. By blending these components, it is possible to improve the writing feeling, reduce the wear of the ball seat, and improve the non-dryness. As rice bran extraction oil, brown rice malt oil or γ-oryzanol,
Commercially available products can be advantageously used, for example, Oriza salad oil, Oriza white sifted oil, rice bran oil, Oriza oil S-1, brown rice malt oil, RST oil, MAC oil, γ-oryzanol,
Oriza Gamma Milky, OZ SOAP, Toughlon, Orizadrim V-50, defatted rice bran, defatted bran, defatted rice bran P6, specially made defatted bran (all trade names; manufactured by Oriza Yuka Co., Ltd.) and the like.

The amount of the rice bran component in the aqueous ballpoint pen ink of the present invention is preferably in the following range.
First, in the first invention, the blending amount of the rice bran fatty acid is preferably about 0.1 to 10% by weight (hereinafter simply referred to as "%") based on the total amount of the ink. If the amount is less than 0.1%, the effect of improving the writing feeling and the effect of improving the non-drying property may be reduced. If the amount is more than 10%, the bleeding of the drawn line may be large, and the dryness of the drawn line may be reduced. In the second invention, the amount of the rice bran component selected from rice bran fatty acid, rice bran extracted oil, brown rice malt oil and γ-oryzanol is preferably about 1 to 25%. If the amount is less than 1%, effects such as improvement of writing feeling, reduction of ball seat abrasion, and improvement of non-dryness may be reduced. If the amount is more than 25%, bleeding of a drawing line is large and drying property of the drawing line is large. May drop.

In the present invention, the above rice bran components can be used in combination of two or more.

The HLB used in the second invention is 7 to
The thirteen nonionic surfactants are blended as emulsifiers, and any surfactant can be used as long as it can emulsify the rice bran component and water.
Nonionic surfactants include, for example, sorbitan fatty acid esters, glycerin fatty acid esters, sorbitan monolaurate, glyceryl monostearate, polyoxyethylene octyl phenyl ether, polyoxyethylene nonyl phenyl ether, polyoxyethylene lauryl ether, polyoxyethylene cetyl Ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyethylene glycol monolaurate, polyethylene glycol monostearate,
Polyethylene glycol monooleate, polyoxypropylene-n-butyl ether, polyoxyethylene polyoxypropylene glycol ether, dialkyl sulfosuccinate, polyoxyethylene octyl phenyl ether, oxyethylene oxypropylene block polymer, polyoxyethylene hydrogenated castor oil, phosphoric acid Ester-type surfactants, fluorine-based surfactants, californica soaps and the like can be suitably used. In the second invention, when the HLB of the nonionic surfactant is lower than 7, or higher than 13, it becomes difficult to emulsify the rice bran component and water,
This results in poor stability of the ink. The blending amount of the nonionic surfactant in the second invention is preferably 0.05 to 3%. If the amount is less than 0.5%, the emulsifying effect of the rice bran fatty acid may not be sufficient, and if it is more than 3%, the drawing lines may be easily blurred. In addition, needless to say, the above-mentioned nonionic surfactant can be blended in the first invention as needed.

The water in the ink of the present invention is blended as a main solvent of the ink, and for example, ion-exchanged water, distilled water and the like are preferably used. The amount of water
It is preferable to set it to about 30 to 80%. The blending amount is 30
%, The ink dischargeability may be poor, and the writing flow rate may decrease. On the other hand, if it is more than 80%, the non-drying property, the writing feeling, and the temporal stability of the ink may be reduced.

Examples of the coloring agent include, without limitation, all dyes soluble or dispersed in water, conventionally known inorganic and organic pigments such as titanium oxide, pseudo-pigments obtained by coloring a resin emulsion with a dye, and white plastic pigments. Can be used. Examples of the dye include acid dyes such as eosin, fuoxin, water yellow # 6-C, acid red, water blue # 105, brilliant blue FCF, and nigrosine NB; and direct dyes such as direct black 154, direct sky blue 5B, and violet BB. Dyes: Basic dyes such as rhodamine and methyl violet can be mentioned. As the inorganic pigment, for example,
Carbon black, metal powders and the like, and as organic pigments, for example, azo lakes, insoluble azo pigments, chelate azo pigments, phthalocyanine pigments, perylene and perinone pigments, anthraquinone pigments, quinacridone pigments, dye lakes, nitro pigments, nitroso pigments and the like Is mentioned.
More specifically, carbon black, titanium black,
Zinc flower, black iron, chromium oxide, iron black, cobalt blue, iron oxide yellow, viridian, zinc sulfide, lithopone, cadmium yellow, vermilion, cadmium red, graphite, molybdenum orange, zinc chromate, strontium chromate, white carbon, clay Inorganic pigments such as talc, ultramarine, sedimentable barium sulfate, barite powder, calcium carbonate, lead white, navy blue, manganese violet, aluminum powder, brass powder, C.I. I. Pigment Blue 1, C.I.
I. Pigment Blue 15, C.I. I. Pigment Blue 17, C.I. I. Pigment Blue 27, C.I. I. Pigment Red 5, C.I. I. Pigment Red 22, C.I.
I. Pigment Red 38, C.I. I. Pigment Red 48, C.I. I. Pigment Red 49, C.I. I. Pigment Red 53, C.I. I. Pigment Red 57, C.I.
I. Pigment Red 81, C.I. I. Pigment Red 104, C.I. I. Pigment Red 146, C.I. I. Pigment Red 245, C.I. I. Pigment Yellow 1, C.I. I. Pigment Yellow 3, C.I. I. Pigment Yellow 12, C.I. I. Pigment Yellow 13,
C. I. Pigment Yellow 14, C.I. I. Pigment Yellow 17, C.I. I. Pigment Yellow 34, C.I.
I. Pigment yellow 55, C.I. I. Pigment yellow 74, C.I. I. Pigment yellow 83, C.I. I.
Pigment Yellow 95, C.I. I. Pigment yellow 166, C.I. I. Pigment yellow 167, C.I. I.
Pigment Orange 5, C.I. I. Pigment Orange 1
3, C.I. I. Pigment Orange 16, C.I. I. Pigment Violet 1, C.I. I. Pigment Violet 3, C.I. I. Pigment Violet 19, C.I. I. Pigment Violet 23, C.I. I. Pigment Violet 50, C.I. I. Pigment Green 7 and the like. The amount of the colorant used can be appropriately increased or decreased according to the drawing line density of the ink.
It is preferable to set it to about 1 to 40%.

The ink of the present invention may contain the following optional components as a regulator in addition to the above components. Examples of the pigment dispersion resin include water-soluble polymers such as ammonium salts of styrene maleic acid and ammonium salts of styrene acrylic acid; examples of the viscosity modifier include synthetic acrylic polymers, natural gums, cellulose, and polysaccharides. ;
Examples of the water-soluble liquid medium include polyhydric alcohols such as propylene glycol, glycerin and polyethylene glycol, a group consisting of an alkylene oxide adduct of glycerin and an alkylene oxide adduct of trimethylolpropane, and mixtures thereof; As the substance, a reducing sugar containing maltitol as a main component,
Benzotriazole saponin is used as a rust preventive such as reducing sugars containing sorbitol as a main component, reduced oligosaccharides, reduced maltooligosaccharides, reduced dextrins, reduced maltodextrins, α-cyclodextrins, β-cyclodextrins, and maltosyl cyclodextrins. Kind; p
Potassium hydroxide, potassium phosphate and the like as H adjusters;
As preservatives, sodium omadine, 1,2-benzisothiazoline and the like can be used as needed.

The aqueous ballpoint pen ink of the present invention can be produced by heating, dissolving, mixing and stirring the above components as required.

[0017]

Next, the present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to these examples.

Examples 1 to 6 and Comparative Examples 1 to 4: Inks of the present invention (Examples 1 to 6) having the compositions shown in Table 1 by a conventional method.
In addition, comparative inks (Comparative Examples 1 to 4) were prepared, and evaluation and judgment were performed for each item of non-dryness, writing feeling, drawing line dryness and bleeding according to the following methods and criteria.
Table 1 also shows the results.

[0019]

[Table 1]

<Evaluation Method and Judgment Criteria> (1) Non-dryness: The inks obtained by the respective formulations were filled into ball-point pens having a ball diameter of 1.0 mm.
After leaving the cap sideways in a constant temperature room at 25 ° C. and a humidity of 65% with the cap removed, one month later, “spiral writing” was performed on writing paper, and the quality of drawing lines was evaluated according to the following criteria. ：: Draw lines are not blurred and writing is good. ：: Blurring is somewhat conspicuous, but writing is generally good. ×: Hardly writing is possible.

(2) Writing feeling: The inks obtained by the respective formulations were filled into ballpoint pens having a ball diameter of 1.0 mm, and "spiral writing" was performed on writing paper, and the writing quality was evaluated according to the following criteria. ：: Smooth and stable writing quality △: Slightly rugged hard writing ×: Rugged hard writing, with broken lines and directionality

(3) Drawing line drying property: The inks obtained by the respective formulations are filled into ballpoint pens having a ball diameter of 1.0 mm, and "spiral writing" is performed on writing paper. It was determined whether or not rubbing and ink transfer to the finger were performed, and the drying speed of the drawn line was evaluated according to the following criteria. : Drying was observed within 30 seconds after writing (the ink did not transfer to the finger). Δ: Drying of the drawn line was observed within 30 seconds to 1 minute after writing. ×: No drying of the drawing was observed within 1 minute after writing.

(4) Bleeding resistance: The inks obtained by the respective formulations were filled into ballpoint pens having a ball diameter of 1.0 mm, and "spiral writing" was performed on a writing paper. Was evaluated. ：: clear handwriting without bleeding △: handwritten with bleeding and somewhat unclear ×: extremely bleeding and extremely unclear handwriting

As is clear from Table 1, the ink of the present invention has higher non-drying property, better writing feeling, and excellent drawing line drying property and bleeding property as compared with Comparative Examples.

[0025]

The water-based ballpoint pen ink of the present invention has a high non-drying property (that is, the pen tip is hard to dry) and has a good writing feeling. In addition, since natural ingredients derived from rice bran are used, they are excellent in safety and recyclable.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoji Takeuchi 2-5-1-12 Irie, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture F-term in Yokohama R & D Center, Mitsubishi Pencil Co., Ltd. (Reference) 4J039 AB04 AE07 BA04 BA06 BA13 BA16 BA18 BA23 BA30 BA31 BA32 BA34 BA35 BA37 BC05 BC07 BC12 BC19 BC20 BC39 BC54 BC56 BC60 BE01 BE03 BE04 BE05 BE06 BE08 BE22 CA03 CA06 EA11 EA45 EA48 GA27

Claims (2)

[Claims] 1. An aqueous ballpoint pen ink containing at least a colorant and water, wherein the rice bran fatty acid is incorporated in an amount of 0.1 to 10% by weight based on the total amount of the ink. 2. An aqueous ballpoint pen ink containing at least a colorant, water, and a nonionic surfactant having an HLB of 7 to 13, wherein the aqueous solution contains rice bran fatty acid, rice bran extracted oil, brown rice malt oil and γ-oryzanol. An aqueous ballpoint pen ink, characterized in that one or more selected from the group consisting of 1 to 25% by weight based on the total amount of the ink.