JPH05247400A - Oily marking pen ink composition - Google Patents

Abstract

PURPOSE:To provide the oily marking pen ink composition containing a coloring agent, an organic solvent, a resin, and a polyether-modified silicone oil. little in thre bleeding of pen marks and not generating the scratching of pen marks when used on the non-absorbing surface of article including glass and coated paper. CONSTITUTION:0.5-25.0wt.% of a coloring agent (e.g. rhodamine), 50.0-95.0wt.% of an organic solvent (e.g. n-propyl alcohol), 1.0-15.0wt.% of a resin, and 0.01-8.0wt.% of a polyether-modified silicone oil exemplified by the reaction product produced by subjecting a dimethylpolysiloxane having Si-H groupd and a polyether having carbon-carbon double bonds at the molecular ends to an addition reaction in the presence of a platinum catalyst to provide the objective oily marking pen ink composition not generating the bleeding and scratching of pen marks when used on the surface of a non-absorbing article such as glass and further on the surface of coated paper relatively near to the non- absorbing article.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink for use in an oil-based marking pen, and more particularly to an oil-based marking pen ink composition which does not cause handwriting bleeding.

[0002]

2. Description of the Related Art Conventionally, solvents such as xylene and cellosolve have been used for oil-based marking pen inks. However, because these solvents have problems of odor or toxicity to human body, oil-based markers using alcohol solvents have been developed. Have been commercialized. However, oil-based marker inks, including alcohol-based inks, have low ink viscosity and the surface tension of each solvent is lower than water-based inks. When writing on the surface, that is, the surface of the coated paper relatively close to the non-absorbent body, there is a problem that the handwriting is blurred. Further, there are some inks in which the ink viscosity is increased to reduce the blurring of the handwriting, but when these are used for an absorber such as paper, there is a problem that the handwriting is blurred.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an oil-based marking pen ink composition which causes less blurring of handwriting and does not cause blurring.

[0004]

Means for Solving the Problems As a result of intensive studies for solving the above problems, the present inventor has found that by incorporating a polyether-modified silicone oil, a handwriting on a non-absorbing surface generated by a conventional oil-based marking pen The present invention has been completed by finding that the bleeding of erythema disappears.

The oil-based marking pen ink composition of the present invention is characterized by containing a colorant, an organic solvent, a resin, and a polyether-modified silicone oil.

The polyether-modified silicone oil used in the ink composition of the present invention is produced by the following method. That is, dimethylpolysiloxane having Si-H and carbon-carbon, a method of addition reaction of a polyether having a double bond at the molecular end under a platinum catalyst, and Si-
There is a method in which dimethylpolysiloxane having an H group is reacted by dehydrogenation with a polyether having a hydroxyl group at the terminal of the molecular chain. Examples of the polyether used include polyethylene glycol, polypropylene glycol, ethylene glycol-propylene glycol copolymer and the like. The polyether to be used has different solubility in a solvent depending on the compounding ratio of dimethylpolysiloxane and polyether, the propylene oxide / ethylene oxide ratio in the polyether, and the like, and further has different properties depending on the organic group at the terminal of the molecular chain of the polyether. Specific examples of the polyether modified silicone oil include KP-316,
KP-361, KP-369 etc. [Shin-Etsu Chemical Co., Ltd.]
Can be given. This polyether-modified silicone oil has the effect of preventing blurring of handwriting, and the amount used is preferably 0.01 to 8.0% by weight with respect to the total amount of ink. 0.
If it is less than 01% by weight, the effect on bleeding is small, and
If the amount is 1% by weight or more, the dryness of handwriting becomes very slow, and the ink viscosity becomes high.

Examples of the colorant used in the ink composition of the present invention include commonly used oil-soluble dyes and pigments such as inorganic pigments and organic pigments. Examples of the dye include Oil Red 5B (manufactured by Orient Chemical Co., Ltd.), Varifast Black # 3810, # 3820 (same as above), Spiron Red C-GH (manufactured by Hodogaya Chemical Co., Ltd.), Rhodamine, Methyl Vio Red and the like. Further, as the pigment, an inorganic pigment and an organic pigment can be used together, and examples thereof include carbon black, titanium oxide, iron black, red iron oxide, azo, phthalocyanine, anthraquinone, indigo, triphenylmethane and xanthan. These may be used alone, or may be used by mixing two or more kinds as necessary. The amount used is preferably 0.5 to 25.0% by weight with respect to the total amount of ink.

Examples of the organic solvent used in the ink composition of the present invention include alcohol solvents such as ethyl alcohol, normal propyl alcohol, isopropyl alcohol, normal butyl alcohol, isobutyl alcohol, methyl cellosolve and propylene glycol monomethyl ether. Can be mentioned. These can be used alone or in combination of two or more. The amount of these solvents used is preferably 50.0 to 95.0% by weight based on the total amount of the ink composition. If necessary, a cosolvent, an anti-whitening agent, etc. may be added.

The resin used in the ink composition of the present invention may be any resin as long as it can be sufficiently dissolved in a solvent, and examples thereof include Arachid 5301X-50 (manufactured by Arakawa Chemical Industry Co., Ltd.) and Tamanor PA (Arakawa Chemical Industry Co., Ltd.). Industry Co., Ltd.
Manufactured by Tamanor 531 [manufactured by Arakawa Chemical Industry Co., Ltd.],
Hitanol 1501 (manufactured by Hitachi Chemical Co., Ltd.), Marquid 31 (manufactured by Arakawa Chemical Industry Co., Ltd.) and the like can be mentioned. The amount of these resins used is 1.0 to 15. With respect to the total amount of the ink composition in consideration of ink viscosity and the like.
0% by weight is preferred.

[0010]

EXAMPLES Examples will be shown below. "Parts" in Examples and Comparative Examples means "parts by weight". (Example 1) Xylene 77.95 parts Arachid 5301X-50 [manufactured by Arakawa Chemical Industry Co., Ltd.] 10.0 parts Balifast Black # 3820 [manufactured by Orient Chemical Industry Co., Ltd.] 12.0 parts Polyether-modified silicone oil [KP-316 Shin-Etsu Chemical Kogyo Co., Ltd.] 0.05 part The above components were mixed and stirred for 1 hour to obtain a black oil-based marking pen ink composition.

Comparative Example 1 Xylene 78.0 parts Arachid 5301X-50 [manufactured by Arakawa Chemical Industry Co., Ltd.] 10.0 parts Varifast Black # 3820 [manufactured by Orient Chemical Industry Co., Ltd.] 12.0 parts Polyether-modified silicone in Example 1 A black oil-based marking pen ink composition was obtained in the same manner as in Example 1 except that the oil was removed.

(Example 2) Propylene glycol monomethyl ether 67.0 parts Isopropyl alcohol 13.0 parts Tamanol PA [Arakawa Chemical Industry Co., Ltd.] 7.0 parts Spiron Yellow C-GNH [Hodogaya Chemical Industry Co., Ltd.] 10.0 parts Polyether Modified silicone oil [KP-361, manufactured by Shin-Etsu Chemical Co., Ltd.] 3.0 parts The above components were mixed and stirred for 1 hour to obtain a yellow oil-based marking pen ink composition.

(Comparative Example 2) Propylene glycol monomethyl ether 70.0 parts Isopropyl alcohol 13.0 parts Tamanor PA [Arakawa Chemical Co., Ltd.] 7.0 parts Spiron Yellow C-GNH [Hodogaya Chemical Co., Ltd.] 10.0 parts Example A yellow oil-based marking pen ink composition was obtained in the same manner as in Example 2 except that the polyether-modified silicone oil in 2 was removed.

Example 3 Ethyl alcohol 70.0 parts Normal propyl alcohol 5.0 parts Benzyl alcohol 3.0 parts Tamanor 531 [manufactured by Arakawa Chemical Industry Co., Ltd.] 7.0 parts Carbon black MA-8 [manufactured by Mitsubishi Kasei Co., Ltd.] 13.0 parts Polyether-modified silicone oil [KP-369, manufactured by Shin-Etsu Chemical Co., Ltd.] 2.0 parts The above components were mixed and stirred for 3 hours to obtain a black oil-based marking pen ink composition.

(Comparative Example 3) Ethyl alcohol 72.0 parts Normal propyl alcohol 5.0 parts Benzyl alcohol 3.3 parts Tamanoru 531 [Arakawa Chemical Industry Co., Ltd.] 7.0 parts Carbon black MA-8 [Mitsubishi Chemical Industries Co., Ltd.] 13.0 parts A black oil-based marking pen ink composition was obtained in the same manner as in Example 2 except that the polyether-modified silicone oil in Example 3 was omitted.

The marking pens were filled with the oil-based marking pen inks obtained in Examples 1 to 3 and Comparative Examples 1 to 3 and tested for bleeding. Test method is 25 ℃ 60%
Under the conditions of glass, double-sided coated paper (JIS P310
5 (art paper) was written on a straight line, and the presence or absence of blurring of the handwriting was visually determined. The evaluation results are shown in Table 1.

[0017]

[Table 1] * ○ No bleeding is observed. △ Bleeding is slightly observed. Bleeding is observed.

[0018]

INDUSTRIAL APPLICABILITY The oil-based marking pen ink composition of the present invention contains a polyether-modified silicone oil and is written on the surface of a non-absorbent body such as glass, or on the surface of a coated paper relatively close to the non-absorbent body. In this case, the problem that the handwriting is blurred is solved.

Claims (1)

[Claims] 1. An oil-based marking pen ink composition comprising a colorant, an organic solvent, a resin, and a polyether-modified silicone oil.