JP2000343879A - Fluid coating-tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid coating-tool provided with a superior backflow prevention function and good coating properties, in which a flowing coating liquid formed by adding a coloring matter and the like in a volatile solvent of low polarity is not affected by change of atmospheric temperature. SOLUTION: A flowing coating liquid A containing a volatile organic solvent of low polarity having at least 1 mmHg of vapor pressure at 20 deg.C, and at most 10 of melting parameter δ is stored in a storage tube of a coating tool provided with the outflow control function for the flowing coating fluid on its end, and a gel-like movable stop B formed of water and a structural viscosity imparting agent, and further another gel-like movable stop C formed of a non-volatile oil selected from mineral oil, silicone oil, ester, polybutene and the like and a structural viscosity imparting agent are stored on the end of the flowing coating fluid A, and the inside of a rear storage tube of the gel-like movable cap C is released to the atmosphere.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid applicator, and more particularly to a fluid applicator used for a writing instrument including a felt-tip pen and a ball-point pen, a correction instrument, an adhesive applicator, a makeup tool, and the like.

[0002]

2. Description of the Related Art In order to prevent scattering and volatilization of a fluid application liquid, a ballpoint pen or the like having a liquid movable stopper at the end of the fluid in a pipe-shaped container containing a fluid has been used. Coating tools are widely known. However, since conventional liquid movable stoppers are mainly composed of non-volatile oils such as mineral oil, silicone oil, ester oil and polybutene, a highly polar volatile liquid such as water is blended. Ink containing a volatile organic solvent such as xylene, cyclohexane, or methylcyclohexane may dissolve in the liquid movable stopper, or may pass through the movable stopper, but may volatilize. There is a problem that it will be put to practical use.

There is also a solid movable stopper made of silicone rubber or the like. However, the above-mentioned fluid containing a low-polarity volatile liquid has an insufficient volatilization preventing effect, and the rubber is swollen and cannot be moved. There was a problem that it disappeared. Further, as an applicator such as a correction tool in which ink containing a low-polarity volatile solvent is enclosed, a type in which a container is sealed without providing a movable stopper has been proposed. However, in this case, the internal pressure changes due to a change in the outside air temperature. For example, there is a problem that the internal pressure increases at a high temperature and ink is excessively discharged during use (excessive outflow), and at a low temperature, the internal pressure decreases and ink does not readily flow out (excessive outflow). .

[0004]

SUMMARY OF THE INVENTION The present invention relates to a method for preparing a coloring material or the like in a low-polarity volatile organic solvent such as xylene, cyclohexane, methylcyclohexane or ethylcyclohexane which is suitable for drying, fixing and bleeding properties of a drawn line. An object of the present invention is to provide a fluid applicator in which a contained fluid application liquid is excellent in a backflow prevention effect without being affected by changes in the outside air temperature and has good applicability.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present inventors have developed a method for controlling the flow of a fluid contained in a housing of an applicator having a coating liquid outflow control mechanism such as a ball-point pen type tip and a needle valve at the tip. As a result of various investigations on the combination of the body fluid and the liquid movable stopper, the combination was not compatible with the fluid fluid.
The inventors have found that the object of the present invention can be achieved by providing various types of gel-like movable stoppers and releasing the rear part of the movable stopper to the atmosphere, thereby completing the present invention.

That is, in the fluid applicator of the present invention, the vapor pressure at 20 ° C. is 1 mmHg or more and the dissolution parameter δ is 10 or less in the accommodating tube of the applicator having the function of suppressing the outflow of the fluid application liquid at the tip. A fluid coating solution A containing a low-polarity and volatile organic solvent is accommodated, and at the end of the fluid coating solution A, a gel-like movable stopper B made of water and a structural viscosity imparting agent, and further thereafter At the end, a non-volatile oil selected from mineral oil, silicone oil, ester oil, polybutene, and the like, and a gel movable stopper C made of a structural viscosity imparting agent are accommodated, and a rear accommodation of the gel movable stopper C is accommodated. The inside of the pipe is open to the atmosphere.

In the present invention, the low-polarity volatile organic solvent used for the fluid coating solution A is n-hexane, n-heptane, n-octane, isooctane, cyclohexane, methylcyclohexane, ethylcyclohexane. , Toluene and xylene, and the gel movable stopper B is made of water and a smectite-based structure viscosity imparting agent, and the gel movable stopper B and the gel movable stopper C are in a two-layer contact state. What is contained is preferred. This smectite is easily available, and exhibits stable structural viscosity especially when added to water. This makes it difficult for the gel-like movable stopper B to transfer to the fluid coating solution A,
The quality as a backflow prevention body can be maintained, and there is an effect of preventing long-term quality deterioration of the fluid application liquid.

[0008]

Embodiments of the present invention will be described below in detail. First, the fluid applicator targeted by the present invention is a writing implement including a felt-tip pen, a ball-point pen, and the like, a correction implement, an adhesive applicator, a cosmetic implement, and the like. The distal end of such a fluid applicator is usually provided with a function of suppressing the outflow of the fluid application liquid, which prevents the fluid from excessively coming out during use. In order to prevent sedimentation of pigments having a large specific gravity, such as titanium dioxide, and to prevent bleeding of drawn lines on the surface to be permeable, it is desirable to make the fluid (ink or the like) a gel. In the case of a body, a ballpoint pen type tip having a structural viscous destruction means, an outflow suppressing function such as a valve-coated application body or a needle valve that closes and holds a tip hole by projecting and biasing a front seat portion with an elastic body. What is provided is preferred.

[0009] The fluid to be applied is accommodated in an accommodation tube formed of a pipe-shaped container of the applicator. The fluid coating liquid A contained here has a vapor pressure of 1 at 20 ° C.
mmHg or more, and a low-polarity and relatively highly volatile organic solvent corresponding to a solubility parameter δ of 10 or less, carbon black, titanium dioxide, coloring materials such as dyes and pigments such as red and blue, and structural viscosity imparting agents, A mixture of resins, surfactants, fragrances, and other optional additives as a thickener / binder soluble in a solvent can be used.

The low-polarity and relatively volatile organic solvents satisfying the above conditions include n-hexane and n-hexane.
At least one organic solvent selected from heptane, n-octane, isooctane, cyclohexane, methylcyclohexane, ethylcyclohexane, toluene, and xylene is desirable. The fluid coating solution A is desirably a compound composition containing, for example, 20 to 80 parts of an organic solvent, 10 to 60 parts of a coloring material such as a pigment, and about 5 to 30 parts of a resin or the like.

In the present invention, the above-mentioned fluid application liquid A is accommodated in the accommodation tube of the applicator, and a gel-like movable stopper B made of water and a structural viscosity imparting agent is provided at an end of the fluid application liquid A. In order to contain and suppress the volatilization of water in the gel-like movable stopper B, a gel-like material comprising a non-volatile oil selected from mineral oil, silicone oil, ester oil, polybutene, and a structural viscosity imparting agent is further provided behind the movable stopper B. The movable stopper C is housed therein, and the interior of the rear accommodating tube of the gel-like movable stopper C is opened to the atmosphere through a small hole D.

The gel movable stopper B has a dissolution parameter δ of 2
A gelled product obtained by gelling water having the highest polarity with 1 with a structural viscosity imparting agent is used. As the structural viscosity imparting agent here,
A wide variety of substances such as thickening polysaccharides, finely divided silica, clay minerals (bentonite, smectite, etc.) are known and can be used in the present invention. Of these, smectites (montmorillonite group minerals constituting clay) are particularly preferable because they generate stable structural viscosity when added to water and are generally easily available. The ratio of the structural viscosity imparting agent is preferably 0.5 to 5 parts with respect to 100 parts of water.
Further, it is desirable that the length (height) of the gel-like movable stopper B is about 5 to 20 mm.

The end movable plug B can suppress the volatilization (dry-up) of the fluid coating solution A.
In this state, the water itself of the gel-like viscous material B also volatilizes. Therefore, in the present invention, mineral oil,
A gel-like movable stopper C made of a non-volatile oil such as silicone oil, ester oil, polybutene and a structural viscosity imparting agent is housed. As a result, dry-up and outflow failure phenomena are eliminated, and good coatability is obtained. At this time, it is desirable that the length (height) of the gel-like movable plug C is about 5 to 20 mm.

Since the inside of the rear accommodating tube of the gel-like movable stopper C at the end is opened to the atmosphere through the small hole D, the internal pressure in the container does not rise or fall due to a temperature change. It can always be applied stably. As a result, these two types of movable stoppers B and C move in accordance with the consumption of the fluid application liquid A in a stacked state, and act as movable stoppers.

[0015]

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

Example 1 A coating tool provided with a ball-point pen type tip at the tip as a flow-out suppressing mechanism and a pipe-shaped storage tube made of nylon 12 having an inner diameter of 5 mm and an outer diameter of 7 mm is provided inside the storage tube of the applicator.
About 2 g of a fluid A in which the following composition was mixed and dispersed was injected. <Fluid A> ・ Methylcyclohexane 40 parts ・ Acrylic resin 10 parts ・ Titanium dioxide (pigment) 50 parts Further, 0.3 g of a movable stopper B having the following composition was placed at the end of the fluid A in the storage tube, and further behind it. 0.3 g of movable stopper C having the following composition was injected in order. <Movable stopper B>-97 parts of purified water-3 parts of smectite-based structural viscous material (Laponite RD manufactured by Nippon Silica Industry Co., Ltd.)-Movable stopper C-67 parts of mineral oil-30 parts of polybutene-3 parts of fine powdered silica This sample Was placed in an oven at 50 ° C., and one month later, the change in weight and the state of application from the tip were observed. Table 1 shows the results.

Example 2 A sample was prepared under the same conditions as in Example 1 except that the methylcyclohexane of the fluid A in Example 1 was changed to ethylcyclohexane, and placed in an oven at 50 ° C., and after one month, the weight change and Was observed for the coating state. Table 1 shows the results.

Example 3 A sample was prepared under the same conditions as in Example 1 except that the methylcyclohexane of the fluid A in Example 1 was changed to normal heptane, and the sample was placed in an oven at 50 ° C., and after one month, the weight change and the amount Was observed for the coating state. Table 1 shows the results.

Example 4 Except that 0.5 part of N-lauroyl-α, γ-di-n-butylamide (GP-1: manufactured by Ajinomoto Co.) was added to Fluid A in Example 1 as a gelling agent. A sample was prepared under the same conditions as in Example 1 and placed in an oven at 50 ° C.
After a month, the change in weight and the state of application from the tip were observed. Table 1 shows the results.

Example 5 A sample was prepared at 50 ° C. under the same conditions as in Example 1 except that 1 part of fine powdered silica (AEROSIL972, manufactured by Nippon Aerosil Co., Ltd.) was added to Fluid A in Example 1 as a gelling agent. , And one month later, the change in weight and the state of application from the tip were observed. Table 1 shows the results.

COMPARATIVE EXAMPLE 1 An applicator provided with a ball-point pen type tip at the tip as a flow-out suppressing mechanism, and a pipe-shaped storage tube made of nylon 12 having an inner diameter of 5 mm and an outer diameter of 7 mm,
About 2 g of the same fluid A used in Example 1 was injected, and 0.6 g of the following movable stopper C used in Example 1 alone was injected into the end of the fluid A in the storage tube. <Movable stopper C>-67 parts of mineral oil-30 parts of polybutene-3 parts of fine powdered silica This sample was placed in a 50 ° C oven, and one month later, the change in weight and the state of application from the tip were observed. Table 1 shows the results.

Comparative Example 2 The movable stopper C of Comparative Example 1 was changed to the movable stopper C having the following composition, and 0.6 g was injected. This sample is 5
It was placed in an oven at 0 ° C., and after one month, the weight change and the state of application from the tip were observed. Table 1 shows the results. <Movable stopper C> ・ 97 parts of methylpolysiloxane ・ 3 parts of fine powdered silica

Comparative Example 3 Only 2 g of the same fluid A as used in Example 1 was poured into a closed container equipped with a ballpoint pen type tip as a flow-out suppressing mechanism, and the sample was placed in an oven at 50 ° C. After a month, the change in weight and the state of application from the tip were observed. Table 1 shows the results.

[0024]

[Table 1]

[0025]

According to the present invention described above, a low-polarity and relatively volatile compound selected from n-hexane, n-heptane, n-octane, isooctane, cyclohexane, methylcyclohexane, ethylcyclohexane, toluene and xylene is used. At the end of the fluid coating liquid containing a high organic solvent, two kinds of gel-structured viscous materials are accommodated as movable stoppers in contact with each other, and the interior of the rear accommodating pipe is opened to the atmosphere, so that the fluid The coating liquid does not dissolve in the movable stopper or pass through the movable stopper and evaporate (dry up). In addition, the movable stopper smoothly moves following the consumption of the fluid application liquid, and has an excellent backflow prevention effect without being affected by changes in the outside air temperature. Become. In the present embodiment, a white fluid using titanium dioxide as a coloring material has been described as an example, but a fluid colored with a dye or pigment such as carbon black or red or blue does not affect the function at all. Further, the present invention exerts the same effect when applied to an outflow suppressing mechanism having a replaceable refill like a ballpoint pen.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Makoto Ono 1091 Tateishi, Fujioka City, Gunma Prefecture F-term in Gunma R & D Center, Mitsubishi Pencil Co., Ltd. 4J039 AB01 AB03 AD01 AE11 BA21 BA23 BC02 BC03 BC20 BE12 BE33 GA26 GA27

Claims (2)

[Claims] 1. A vapor pressure at 20 ° C. of 1 is provided in an accommodating tube of an applicator having a function of suppressing the outflow of a fluid application liquid at its tip.
The fluid coating liquid A containing a low-polarity and volatile organic solvent having a dissolution parameter δ of 10 or less and a dissolution parameter δ of 10 mmHg or more is accommodated, and at the end of the fluid coating liquid A, water and a structural viscosity imparting agent are used. And a gel movable stopper C made of a non-volatile oil selected from mineral oil, silicone oil, ester oil, polybutene and the like and a structural viscosity imparting agent. A fluid applicator characterized in that the inside of the rear accommodating tube of the gel-like movable stopper C is open to the atmosphere. 2. The low-polarity and volatile organic solvent used in the fluid coating solution A includes n-hexane, n-heptane, and n-hexane.
Octane, isooctane, cyclohexane, methylcyclohexane, ethylcyclohexane, toluene, xylene, or more, selected from the group consisting of one or more, and the gel movable stopper B is composed of water and a smectite-based structure viscosity imparting agent. The fluid applicator according to claim 1, wherein the gel-like movable stopper (C) is accommodated in a two-layer contact state.