JP4141274B2 - Oil-based ink for marking pens - Google Patents

Description

【００１５】
【効果】
以上、特定の物質を選択的に配合したことにより、ガムテープのコーティング面にインキがはじかれてることがなくクリアに筆記でき、かつ、水で濡れた面であっても全く問題なく筆記可能であって、筆記対象物にインキが強く密着性し、強く指で擦っても取れることがないマーキングペン用油性インキを得ることができた。また、本発明インキ又は本発明インキを内蔵したマーキンペンを長期間保存しておいても染料が析出することがない油性インキを得ることができた。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil-based ink for a marking pen that can be written on a gummed tape and can also be written on a wet surface.
[0002]
[Prior art]
Gum tape used for packing packages and sealing cardboard boxes has a silicone coating on the surface opposite to the surface where the adhesive is applied, and normal oil-based markers could not be written because the ink was repelled. .
In addition, conventional oil-based markers that employ alcohol or xylene as the main solvent have the disadvantage that, when written on the surface of foamed polystyrene, etc. wet with water, moisture is absorbed and writing becomes impossible immediately.
JP-A-60-13865 and JP-A-61-211169 have been disclosed as oil-based inks invented to solve the above-mentioned drawbacks, but the ink adhesion is weak and can be removed by rubbing with a finger strongly. There were drawbacks. In particular, when writing on an object made of polyethylene or polypropylene, there was a drawback that the adhesion was very poor and could be removed immediately.
Also, as disclosed in JP-A-49-125125, an ink that can be firmly fixed and solidified on a polyolefin-based resin film is known, but in each of the examples requiring a heating and stirring step of 100 ° C. to 130 ° C. for 30 minutes. As can be seen from the ink production method, the ink of the present invention is unstable at room temperature and has a drawback that the dye is likely to precipitate.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 60-13865 [Patent Document 2]
JP-A-61-211169 [Patent Document 3]
JP-A-49-125125 [0004]
[Problems to be solved by the invention]
The present invention has been made to solve the above-described problems, and is not repelled on the coating surface of the gum tape, and can be written even on a wet surface. Provided is a marking pen oil-based ink that has strong adhesiveness and cannot be removed even if it is strongly rubbed with a finger, and that can withstand long-term storage without precipitation of dye. The purpose is that.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, C.I. I. SolventBlack 3, C.I. I. SolventRed 18, C.I. I. SolventBlue 70, C.I. I. Solvent Yellow 14, C.I. I. Solvent Yellow 33, C.I. conjugated with alkylphenol resin. I. Provided is an oil-based ink for a marking pen comprising one or more dyes selected from Solvent Red 49, an organic solvent comprising an isoparaffin hydrocarbon having 6 to 10 carbon atoms, and an alkylphenol resin.
[0006]
Hereinafter, the present invention will be described in detail.
In the present invention, a dye having a phenyl group and / or a dye bonded to an alkylphenol resin can be used as a colorant. Anthraquinone, cyanine, monoazo, disazo, quinoline, etc., xanthene bonded to an alkylphenol resin One or more of oil-soluble dyes such as can be used. Specifically, C.I. I. SolventBlack 3, C.I. I. SolventRed 18, C.I. I. SolventBlue 70, C.I. I. Solvent Yellow 14, C.I. I. Solvent Yellow 33, C.I. conjugated with alkylphenol resin. I. SolventRed49 etc. can be illustrated.
The dye can be used in an amount of 0.1 to 50% by weight, particularly preferably 1 to 15% by weight, based on the total amount of ink.
[0007]
The organic solvent can be selected from isoparaffin hydrocarbons having 6 to 10 carbon atoms. Specific examples of the isoparaffin hydrocarbon having 6 to 10 carbon atoms include isohexane, isoheptane, isooctane, isononane, and isodecane.
In this invention, it can select arbitrarily from the said solvent etc., A single solvent or 2 or more types of mixed solvents can be used, Among these, isoheptane, isooctane, and isononane are used most preferably.
The organic solvent can be used in an amount of 40 to 99% by weight, particularly preferably 50 to 95% by weight, based on the total amount of ink.
[0008]
As the resin, alkylphenol resins such as hexylphenol resin, heptylphenol resin, octylphenol resin, nonylphenol resin, and decylphenol resin are used. Since the alkylphenol resin is compatible with both the dye and the solvent, the alkylphenol resin substantially serves as a surfactant for both, and the dye can be completely dissolved in the solvent at room temperature. In addition, it may be rephrased that the alkylphenol resin acts as a dye dissolving agent. As a result, the ink of the present invention does not precipitate and separate even after a long period of time.
The alkylphenol resin can be used in an amount of 0.1 to 50% by weight, particularly preferably 1 to 40% by weight, based on the total amount of ink.
[0009]
In addition, in the present invention, additives such as preservatives, fungicides, dye solubilizers such as amines, phosphate esters and fatty acids, penetrants such as benzyl alcohol, etc. used in general oil-based markin pen inks are further added. It can also be blended.
[0010]
【Example】
Hereinafter, the present invention will be described with reference to examples.
(Example 1)
C. conjugated with alkylphenol resin. I. SolventRed49 6.0% by weight
Isooctane 64.0% by weight
Nonylphenol resin 30.0% by weight
The above substances were mixed to obtain a red ink.
[0011]
(Example 2)
C. I. Solvent Yellow 33 5.0% by weight
Isononane 62.0% by weight
Hexylphenol resin 33.0% by weight
The above substances were mixed to obtain a yellow ink.
[0012]
(Example 3)
C. I. SolventBlack3 8.0 wt%
Isooctane 32.0% by weight
Isononane 32.0% by weight
Octylphenol resin 28.0% by weight
The above substances were mixed to obtain a black ink.
[0013]
A marking pen consisting of a main body and a cap provided with a fiber pen core and an ink absorber was filled with the above Example and Example 3 of JP-A-49-125125 as a comparative example, and each test was performed.
(1) Adhesion test: Written on the coated surface of the gummed tape and rubbed it with fingers.
A: The writing line was not drawn at all.
X: Some writing lines were removed.
(2) Writability test: Written on styrofoam wetted with water and examined for writability.
A: I was able to write without any problems.
X: A sufficient writing line could not be obtained.
(3) Stability test over time: Take the ink in a glass bottle and place it in a low temperature / high temperature device (Incubator (manufactured by Sanyo Electric Co., Ltd.)). Temperature rise from -10 ° C to 50 ° C for 3 months The temperature was repeatedly reduced for 60 minutes, and then the presence or absence of precipitation of solids such as dyes and thickening of the ink composition was observed and evaluated.
(Double-circle): There was no thickening of ink and solid content precipitation.
X: There was thickening of ink and / or precipitation of solid content.
The test results are tabulated below.
[0014]

[0015]
【effect】
As mentioned above, by selectively blending specific substances, the ink can not be repelled on the coated surface of the gum tape, and it can be written without any problems even on wet surfaces. Thus, it was possible to obtain an oil-based ink for marking pens, in which the ink strongly adheres to the writing object and cannot be removed even when strongly rubbed with a finger. Moreover, even if the ink of the present invention or the Markin pen containing the ink of the present invention is stored for a long period of time, an oil-based ink in which the dye does not precipitate can be obtained.

Claims (1)

C. I. SolventBlack 3, C.I. I. SolventRed 18, C.I. I. SolventBlue 70, C.I. I. Solvent Yellow 14, C.I. I. Solvent Yellow 33, C.I. conjugated with alkylphenol resin. I. 1 or 2 or more dyes chosen from SolventRed49, the organic solvent which consists of a C6-C10 isoparaffin hydrocarbon, and the oil-based ink for marking pens which consists of an alkylphenol resin.