JP3051101U - Ballpoint pen filled with double coloring water-based ink - Google Patents

Abstract

(57) [Summary] [Problem] A central part exhibits a metallic luster color of a metallic powder pigment,
To provide a water-based ballpoint pen in which the dye penetrates and diffuses together with a solvent to form a contour line in a peripheral portion, and exhibits a double coloring effect. SOLUTION: The composition contains at least a metal powder pigment, a water-soluble dye, a thickener, a water-soluble organic solvent and water, and has a viscosity of 1000 to 1000.
20000c. p. A ballpoint pen filled with a double color aqueous ink (Brookfield viscometer, cone No. 40, rotation number 0.1 rpm, 25 ° C.).

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a water-based ballpoint pen using a metal powder pigment, which provides a metallic glossy handwriting, and has a single color in an ink state, but when writing on a penetrable material such as paper, the central part is a metal. The present invention relates to an aqueous ballpoint pen which exhibits a metallic luster color of a powdered pigment, and a peripheral portion in which a dye is infiltrated and diffused with a solvent to form an outline, thereby exhibiting a double coloring effect.

[0002]

[Prior art]

 Conventionally, various inks using aluminum powder or bronze powder as a pigment have been proposed in order to obtain handwriting of a metallic luster color such as gold or silver. For example, Japanese Patent Application Laid-Open No. Hei 1-210478 discloses an aqueous metallic ink in which an acetylene alcohol derivative is added as an additive to an ink main component comprising a resin, an aluminum paste, and water. Ink for marking pens, which consists of fine metal powder such as aluminum powder with surface treatment, resin and solvent, has smooth ink spillability from various marking pens, and has easy dispersibility. It is shown. Japanese Patent Application Laid-Open No. Hei 7-145339 discloses an aqueous metallic glossy ballpoint pen ink using aluminum powder and a water-soluble thickening resin. Furthermore, Japanese Patent Publication No. 62-37678 and Japanese Patent Publication No. 5-2712 disclose a metal powder pigment, a solvent, a dye and a resin soluble in the solvent, and a metal powder pigment formed around a handwriting. A dual color ink composition is disclosed wherein the dye seeps and diffuses to produce a contour effect. However, the ink described in the above-mentioned publication is a low-viscosity ink for a marking pen, and cannot prevent sedimentation and separation of aluminum powder in the ink.

[0003]

[Problems to be solved by the invention]

 The above-described dual-color ink composition is for a marking pen and has a low viscosity, and cannot be applied to a ball-point pen as it is. That is, the double-colored ink described in the above-cited Japanese Patent Publication No. 62-37878 is oily and is intended for a marking pen. The double-colored ink disclosed in Japanese Patent Publication No. 5-2712 is a water-based ink, but is conscious of a marking pen as described above. These inks cannot be used unless a stirrer such as a metal sphere is stored in the ink storage chamber as a writing implement, and the writing implement is shaken at the time of use to re-disperse the precipitated metal powder pigment. Therefore, neither discloses the viscosity of the ink in detail.

[0004] As an ink composition for a ballpoint pen, it is necessary to maintain a viscosity that can prevent precipitation of a metal powder pigment while maintaining fluidity. No coloring ink is known. The purpose of the present invention is to maintain the fluidity of the ink, which tends to give a contour effect by penetrating and diffusing the dye around the handwriting formed by metallic powder pigments, etc. An object of the present invention is to provide a ball-point pen filled with an aqueous ink that exhibits a double coloring effect that is stable even over time without the use of ink.

[0005]

[Means for Solving the Problems]

 The above objects can be achieved by the present invention summarized below and preferred embodiments thereof. (1) It contains at least a metal powder pigment, a water-soluble dye, a thickener, a water-soluble organic solvent, and water, and has a viscosity of 1,000 to 20,000 c. p. (Brookfield viscometer, cone No. 40, rotation number: 0.1 rpm, 25 ° C.), characterized by being filled with a double-colored aqueous ink. (2) The ballpoint pen as described in (1) above, wherein the metal powder pigment has an average particle size of 1 to 20 μm. (3) The ballpoint pen according to the above (1) or (2), wherein the metal powder pigment is at least one metal powder selected from aluminum powder, bronze powder, copper powder, gold powder and silver powder.

(4) The ballpoint pen according to any one of the above (1) to (3), wherein the aluminum powder is in the form of an aluminum paste. (5) The ballpoint pen according to any one of the above (1) to (4), wherein a pigment other than the metal powder pigment is used as a coloring material. (6) The ball pen according to any one of (1) to (5), wherein the thickener is xanthan gum. (7) The water-soluble organic solvent is at least one selected from ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, polyethylene glycol, glycerin, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether and triethanolamine. The ballpoint pen according to any one of (1) to (6).

(8) 2 to 30% by weight of a metal powder pigment having an average particle size of 1 to 20 μm, 0.1 to 25% by weight of a water-soluble dye, 0.3 to 2% by weight of xanthan gum as a thickener, and water solubility It contains 5 to 50% by weight of an organic solvent and the balance of water, and has a viscosity of 1000 to 20000 c. p. A ballpoint pen filled with a double-colored aqueous gel ink (Brookfield viscometer, cone No. 40, rotation number 0.1 rpm, 25 ° C.).

[0008]

[Embodiment of the invention]

 FIG. 1 shows an external view of an embodiment of the ballpoint pen according to the present invention. A double-colored aqueous gel ink 1 according to the present invention is filled in a transparent plastic ink tank 5, and a backflow preventing agent 7 such as polybutene is filled in the rear of the ink tank. The tank surface is a single color according to the color tone of the metal powder pigment and the water-soluble dye to be blended, but it has a unique appearance, and when the handwriting is written on a permeable material such as paper, the central part is the metal powder paint. It has a metallic luster color, and the dye used permeates and diffuses with the solvent in the peripheral part to form a contour line, and exhibits a so-called double color developing effect. 2 represents a ball holder, 3 represents a ball at the tip of the pen, 4 represents a joint, and 6 represents a tail plug. The present invention can be applied to either a container type or a storage tube type commonly used as an aqueous ballpoint pen. The ink tank is preferably made of polyethylene or polypropylene.

The present invention (1) includes at least a metal powder pigment, a water-soluble dye, a water-soluble organic solvent, water and a thickening resin, and the ink has a viscosity of 1,000 to 20,000 c. p. (A Brookfield E-type viscometer, No. 40 cone, 0.1 rpm, 25 ° C.), a ballpoint pen filled with a double-colored aqueous ink, in which the viscosity of the ink was limited to 1000 to 20,000 cps. If it is lower than 1000 cps, the sedimentation and separation of the metal powder pigment cannot be prevented, and there is no problem in ink ejection if it is 30,000 cps or less when writing normally, but if it is less than 20,000 cps, the fluidity of the ink will deteriorate. This is because, when written, the dye is less liable to seep and diffuse, and tends not to exhibit the double coloring effect.

The metal powder pigment used in the present invention is a colorant for imparting a metallic glossy color. As the metal powder pigment, a metal powder pigment composed of a metal powder such as aluminum powder, bronze powder, copper powder, gold powder, and silver powder is used. Easy to handle. The amount of the metal powder pigment used is preferably 2.0 to 30.0% by weight based on the total amount of the ink. When the amount used is less than 2.0% by weight, the metallic luster is reduced in handwriting and the amount used is 30. If the content exceeds 0% by weight, the solid content increases, so that the fluidity decreases and ink ejection tends to deteriorate. The average particle diameter of the metal powder pigment is preferably 1 to 20 μm. When the average particle size is less than 1 μm, the metallic luster of the handwriting is reduced, and the handwriting tends to be unclear. When the average particle size exceeds 20 μm, the ink discharge is reduced with a nib conventionally used as a ballpoint pen, and it is difficult to apply. . Further, as the coloring material forming the central part of the handwriting together with the metal powder pigment, ordinary pigments conventionally used in aqueous inks can be used without limitation. Examples of such pigments include inorganic pigments such as carbon black and titanium oxide, quinacridone-based pigments such as quinacridone violet, insoluble azo pigments such as Hansa Yellow 10G, and organic pigments such as phthalocyanine blue.

[0011] The dye for trimming the periphery of the metal powder pigment is a water-soluble dye having a color different from that of the pigment. When the ink composition is written on a solvent-permeable writing surface, the dye dissolved in the solvent penetrates and diffuses into the network of the writing surface together with the solvent to form a unique contour around the metal powder pigment. I do. Therefore, water-soluble dyes conventionally used in aqueous ink compositions can be used without limitation. Examples of the water-soluble dye include C.I. I. Acid Yellow 23, C.I. I. Acid Red 52, C.I. I. Acid dyes such as Acid Blue 1; I. Basic Blue 7, C.I. I. Basic dyes such as Basic Red 1; I. Direct Blue 86, C.I. I. Direct dyes such as Direct Orange 8 are used. The amount of the water-soluble dye used is preferably 0.1 to 25.0% by weight based on the total amount of the ink. When the content is less than 0.1% by weight, the color of the trimming becomes light, and the trimming effect is reduced. If it exceeds 25.0% by weight, the viscosity of the ink becomes high and the fluidity of the ink becomes low. The balance of the composition is water used as a main solvent.

The water-soluble organic solvent is used for various qualities as an ink for a ballpoint pen, for example, for preventing the ink from drying at the pen tip and preventing the ink from freezing at low temperatures. Specifically, glycols such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, polyethylene glycol, and glycerin, and ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethanolamine, and the like are used alone or in combination. Can be used. The amount used is preferably 5.0 to 50.0% by weight based on the total amount of the ink.

The thickening resin generally imparts thixotropic properties to the ink, and prevents sedimentation of the metal powder pigment and quality as an ink composition for an aqueous ballpoint pen, for example, prevention of ink leakage from a pen tip, It is used for the purpose of ink discharge, prevention of dirt on pen tip and prevention of dents. In addition, the present invention must be used in consideration of the fluidity of the ink when the dye permeates and diffuses around the handwriting. Specific examples include guar gum, locust bean gum and its derivatives, seed xansan gum, microbial xanthan gum, and tarragant gum, a seaweed polysaccharide. In particular, microbial xanthan gum is excellent in that physical properties are stable even after long-term storage, and there is little deterioration in writing and writing quality as a ballpoint pen. In consideration of the quality of the ballpoint pen, the amount used is preferably 0.3 to 2.0% by weight based on the total amount of the ink. When the amount of the resin for thickening is less than 0.3% by weight, sedimentation of the metal powder pigment is liable to occur, and when the amount exceeds 2.0% by weight, the viscosity and physical properties of the ink cause problems. This is because there is a tendency for the ejection of the pen tip having a certain size to be worse. However, in the present invention, if it exceeds 1.6% by weight, the fluidity of the ink becomes poor, and the dye tends to hardly permeate and diffuse around the handwriting.

When the double-colored aqueous ink of the present invention is written on a solvent-permeable writing surface, the metal powder pigment is trapped by the network of the writing surface and is prevented from penetrating and diffusing. As a result, the metal powder pigment is accurately written along the writing surface. Applied on top. At this time, the pigment is dispersed in the metal powder pigment and is captured together in the network structure, or is captured on the surface of the metal powder pigment, and the handwriting develops a metallic color by the pigment and the metal powder pigment. Some of the dyes also form handwriting, but penetrate and diffuse into the network of the writing surface together with the solvent to reach the outside of the handwriting, mainly over the periphery of the handwriting, and around the handwriting in a color different from the handwriting. It forms an outline and outline. Therefore, if the fluidity of the ink is low, the solvent is unlikely to cause permeation and diffusion, and accordingly, the dye is also unlikely to cause permeation and diffusion. As a result, the dye is also unlikely to permeate and diffuse and it is difficult to form a contour portion. For this reason, the viscosity was specified as described above. Therefore, in the present invention, the specification of the viscosity has an important significance.

[0015] In addition to the above components, various additives used in ordinary water-based ballpoint pen inks can be added to the dual color ink composition used in the present invention, if necessary. The following are examples of the components of the additive. (1) Nonionic and anionic surfactants Polyethylene glycol oleyl ether, polyethylene glycol nonyl phenyl ether, polyethylene glycol polypropylene glycol ether, ethylene glycol of 2,4,7,9-tetramethyl-5-decyl-4,7-diol Nonionic surfactants such as oxide adducts; anionic surfactants such as naphthalenesulfonic acid formalin condensate; dialkylsulfosuccinates or sodium salts.

(2) Preservatives Potassium sorbate, sodium benzoate, sodium pentachlorophenyl, sodium dehydroacetate and the like. (3) pH adjuster Sodium hydroxide, sodium carbonate, triethanolamine and the like. (4) Rust inhibitors Benzotriazole, tolyltriazole, dicyclohexylammonium nitrate and the like.

In producing the ink for a double-colored aqueous ballpoint pen of the present invention, various conventionally known methods can be employed. For example, a uniform ink composition can be obtained by mixing the above components, heating if necessary, and sufficiently stirring. If necessary, a dispersion device such as a ball mill may be used.

Hereinafter, specific examples of the ink for a dual-color aqueous ballpoint pen of the present invention will be described to demonstrate the effects of the present invention. (Example 1) Alpaste 1500MA 5.0 parts by weight (trade name, manufactured by Toyo Aluminum Co., Ltd.) Eosin 10.0 parts by weight Ethylene glycol 15.0 parts by weight Glycerin 10.0 parts by weight Xanthan gum 0.8 parts by weight ( Water (59.2 parts by weight, manufactured by Dainippon Pharmaceutical Co., Ltd.) Water 59.2 parts by weight The above components and, if necessary, a surfactant, a preservative, a pH adjuster, a rust inhibitor, etc. are mixed, and the mixture is heated to 40 to 60 ° C. The mixture was heated and stirred for about 5 hours to prepare an ink having a viscosity of 8000 cps (Brookfield E-type viscometer, No. 40 cone, 0.1 rpm, 25 ° C.). Filled into a ballpoint pen. The writing feeling was good and a beautiful double-colored writing line was given.

(Example 2) Alpaste 0500M 10.0 parts by weight (Toyo Aluminum Co., Ltd., trade name) Brilliant Blue FCF 8.0 parts by weight (Daiwa Kasei Co., Ltd., trade name) Glycerin 20.0 Parts by weight xanthan gum 1.2 parts by weight water 59.8 parts by weight The above components and, if necessary, a surfactant, a preservative, a pH adjuster, a rust inhibitor, etc. are mixed and heated to 40 to 60 ° C. And stirred for about 5 hours to prepare an ink with a viscosity of 18000 cps (Brookfield E-type viscometer, No. 40 cone, 0.1 rpm, 25 ° C.), and filled it into a tube-type ball-point pen shown in FIG. did. The writing feel was good and a beautiful double-colored writing line was given.

Example 3 Alpaste 1500M 5.0 parts by weight (Toyo Aluminum Co., Ltd., trade name) Hansa Yellow 3G 10.0 parts by weight (Hoechst Gosei Co., Ltd., trade name) Water Violet # 1 10.0 parts by weight (trade name, manufactured by Orient Chemical Industry Co., Ltd.) Ethylene glycol 15.0 parts by weight Glycerin 10.0 parts by weight Xanthan gum 0.6 parts by weight Water 49.4 parts by weight The above components and further as required A surfactant, a preservative, a pH adjuster, a rust inhibitor, etc. are mixed, heated to 40 to 60 ° C., and stirred for about 5 hours to obtain a viscosity of 9500 cps (E-type viscometer manufactured by Brookfield, No. An ink of .40 cone, 0.1 rpm, 25 ° C.) was prepared and filled into a tube-type ball-point pen shown in FIG. The writing feeling was good and a beautiful double-colored writing line was given.

Example 4 Alpaste 0500M 10.0 parts by weight Hansa Yellow 3G 15.0 parts by weight Eosin 10.0 parts by weight Ethylene glycol 25.0 parts by weight Xanthan gum 1.0 parts by weight Water 48.8 parts by weight The components and, if necessary, a surfactant, a preservative, a pH adjuster, a rust inhibitor, etc. are mixed, heated to 40 to 60 ° C., and stirred for about 5 hours to have a viscosity of 13,000 cps (manufactured by Brookfield). An ink of E-type viscometer, No. 40 cone, 0.1 rpm, 25 ° C.) was prepared and filled into a housing-tube type ball-point pen shown in FIG. The writing feel was good and a beautiful double-colored writing line was given.

(Comparative Example 1) The same treatment as in Example 1 was carried out except that the amount of xanthan gum of Example 1 was reduced to 0.2 parts by weight and water was added by the reduced amount, and the viscosity was 750 cps (manufactured by Brookfield). An E-type viscometer, No. 40 cone, 0.1 rpm, 25 ° C.) was prepared and filled into a tube-type ball-point pen shown in FIG. Sedimentation of the metal powder pigment was observed, and writing was impossible.

Comparative Example 2 The same treatment as in Example 1 was carried out except that the amount of xanthan gum of Example 1 was increased to 2.1 parts by weight and the amount of water was reduced by the increased amount, and the viscosity was 30,000 cps (Brookfield Co., Ltd.) An E-type viscometer, No. 40 cone, 0.1 rpm, 25 ° C.) was prepared and filled into a storage tube type ball-point pen shown in FIG. Writing was not possible due to poor ink ejection.

Comparative Example 3 Except that the amount of xanthan gum of Example 1 was increased to 1.8 parts by weight and the amount of water was reduced by the increased amount, the same treatment as in Example 1 was carried out to obtain a viscosity of 25,000 cps (Brookfield Co., Ltd.). An E-type viscometer, No. 40 cone, 0.1 rpm, 25 ° C.) was prepared and filled into a storage tube type ball-point pen shown in FIG. Although writing was possible, a blurring occurred and no double coloring effect could be confirmed. Using the inks obtained in Examples 1 to 4 and Comparative Examples 1 to 3, a test was conducted on the appearance color, writing performance, and writing line color of the ink filled in the ink storage tube. Table 1 shows the colors of the writing lines.

[0025]

[Table 1] (Note in Table 1) Comparative Example 1: The color of the writing line could not be determined because writing could not be performed. Comparative Example 2: The color feeling of the writing line could not be determined because writing could not be performed. -Aging conditions: left in a 50 ° C oven for one month. Evaluation Appearance color impression of the ink filled in the ink storage tube: ・ ・ ・: Vivid metallic luster color ×: Sedimentation separation occurred Writing performance: ・ ・ ・: Good writing was possible. ○: Can write without problems. Δ: Scratching occurred ×: Writing was impossible ・ Writing paper: high-quality paper (JIS P 3201 writing paper A) Coloring of writing line: ・ ・ ・: A clear double coloring effect can be confirmed.・ ・ ・: The double coloring effect can be confirmed, but the center is slightly colored. Δ: Double coloring effect can be confirmed slightly. ×: Double coloring effect cannot be confirmed.

[0026]

[Effect of the invention]

 As described in detail above, when the ballpoint pen of the present invention is used, when writing on a penetrable material such as paper, a clear double coloring effect can be exerted, and even when stored for a long period of time, there is no deterioration of the ink over time. Thus, it is possible to provide a double-colored aqueous ballpoint pen that is stable in terms of color.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing the appearance of a specific example of a ballpoint pen using the dual-color aqueous pigment ink according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ink 2 ... Ball holder 3 ... Ball 4 ... Joint 5 ... Ink tank 6 ... Tail plug 7 ... Backflow inhibitor

Claims (8)

[Utility model registration claims] 1. A composition comprising at least a metal powder pigment, a water-soluble dye, a thickener, a water-soluble organic solvent and water, and having a viscosity of 1000 to 1000.
20000c. p. A ballpoint pen filled with a double color aqueous ink (Brookfield viscometer, cone No. 40, rotation number 0.1 rpm, 25 ° C.). 2. The metal powder pigment has an average particle size of 1 to 20 μm.
The ballpoint pen according to claim 1, wherein m is m. 3. The metal powder pigment is at least one metal powder selected from aluminum powder, bronze powder, copper powder, gold powder and silver powder.
The ballpoint pen described in 1. 4. The ballpoint pen according to claim 1, wherein the aluminum powder is in the form of an aluminum paste. 5. The ballpoint pen according to claim 1, wherein a pigment other than a metal powder pigment is used as a coloring material. 6. The method according to claim 1, wherein the thickener is xanthan gum.
6. The ballpoint pen according to any one of 5. 7. The water-soluble organic solvent is ethylene glycol, diethylene glycol, triethylene glycol,
It is at least one selected from propylene glycol, polyethylene glycol, glycerin, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether and triethanolamine.
7. The ballpoint pen according to any one of 6. 8. A metal powder pigment 2 having an average particle size of 1 to 20 μm.
-30% by weight, 0.1-25% by weight of a water-soluble dye, 0.3-2% by weight of xanthan gum as a thickener, 5-50% by weight of a water-soluble organic solvent and the balance of water, and a viscosity of 1000-1000
20000c. p. (Brookfield viscometer, cone No. 40, rotation number: 0.1 rpm, 25 ° C.) A ballpoint pen filled with a double-colored aqueous gel ink as a pigment.