Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1994-02-22
1995-06-13
Klemanski, Helene
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
C09D 1102
Patent
active
054239079
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an ink for use in marking pens, and more specifically, it relates to an ink for marking pens in which ethanol is used as a main solvent.
BACKGROUND ART
In inks for oily marking pens, there have been used solvents such as xylene, methyl cellosolve and the like which have a good solubility to oil-soluble dyes, but these solvents are odorous and poisonous and so they are devoid of safety to human beings. For this reason, the usage, use circumstances and the like of these solvents are required to be restricted and limited.
In order to solve these problems, there has been developed, in recent years, an alcoholic ink mainly comprising a less odorous and less poisonous alcoholic solvent, particularly an ink for marking pens (hereinafter referred to as "ethanol-based ink") in which ethanol is used as a main solvent.
However, in this kind of ethanol-based ink, a dye is insoluble, and even if soluble, the dye precipitates during a long period of time, which means that the ink is poor in stability with time, because among organic solvents, ethanol has a relatively low solubility to the dye and a resin, and the oil-soluble dye which has been heretofore used in the marking pens contains a few functional groups having an interaction with ethanol. Hence, a dye is now desired which is compatible with ethanol and an ethanol-soluble resin for use in the ink.
DISCLOSURE OF THE INVENTION
The present invention intends to overcome the abovementioned drawbacks of an ink for marking pens containing ethanol as a main solvent, and an object of the present invention is to provide an ethanol-based ink for marking pens which inhibits a dye from precipitating and which is excellent in stability with time and water resistance.
The present inventors have intensively conducted research to solve the above-mentioned problems, and as a result, they have succeeded in finding a dye having a specific structure which is excellent in compatibility with ethanol and an ethanol-soluble resin. In consequence, an ethanol-based ink for marking pens of the present invention has now been completed.
That is, an ethanol-based ink for marking pens of the present invention is characterized by comprising at least one dye selected from the group consisting of dyes represented by the following formulae (I) to (IX) and a dye of Color Index No. Solvent Black 7, an ethanol-soluble resin, and ethanol: ##STR1## (wherein R.sup.1 is --CH.sub.3 or --C.sub.2 H.sub.5, R.sup.2 is --H, --CH.sub.3, --Cl or --SO.sub.2 NH.sub.2, R.sup.3 is an alkyl group of C.sub.6 -C.sub.18, R.sup.4 is --H, --CH.sub.3 or --Cl, R.sup.5 is --CH.sub.3 or --C.sub.2 H.sub.5, R.sup.6 is --H, --CH.sub.3, --C.sub.2 H.sub.5 or a phenyl group, R.sup.7 is --H, --CH.sub.3 or --C.sub.2 H.sub.5, R.sup.8 is an alkyl group or a substituted alkyl group of C.sub.6 -C.sub.18, each of R.sup.9 -R.sup.14 is independently --H, --CH.sub.3 or --C.sub.2 H.sub.5, each of R.sup.15 and R.sup.16 is independently --H, --CH.sub.3, --C.sub.2 H.sub.5 or a phenyl group, R.sup.17 is --H, --CH.sub.3, --C.sub.2 H.sub.5 , --OH, --NH.sub.2 or --NO.sub.2, R.sup.18 is an alkyl group of C.sub.1 -C.sub.4, p is a value in the range of 2 to 80, CuPc is a copper phthalocyanine group, each of R.sup.19 and R.sup.20 is independently an alkyl group or a substituted alkyl group, Y.sup.+ is a substituted guanidine cation, each of m and n is an integer and m+n is in the range of 2 to 4, R.sup.21 is H or a group represented by the formula ##STR2## R.sup.22 is --H, --NO.sub.2 or --CH.sub.3, Z.sup.+ is an ammonium ion containing at least one of an alkyl group, an alkoxy-substituted alkyl group and a hydroxy-substituted alkyl group of C.sub.10 -C.sub.18 -C.sub.18, each of R.sup.23 and R.sup.24 is an alkyl group of C.sub.1 -C.sub.4, and l is an integer of 1 to 5).
A yellow ink for marking pens of the present invention comprises a yellow dye represented by the formula (I) ##STR3## (wherein R.sup.1 is --CH.sub.3 or --C.sub.2 H.sub.5, R.sup.2 is --H, --CH.sub.3, --Cl or --SO.sub.2 NH.sub.2, and R.
REFERENCES:
patent: 3961965 (1976-08-01), Zwahlen
patent: 4304601 (1981-12-01), Sharp
patent: 4525216 (1985-06-01), Nakanishi
patent: 4557618 (1985-12-01), Iwata et al.
patent: 4578117 (1986-03-01), Nakanishi
patent: 4604139 (1986-08-01), Shioi et al.
patent: 4605441 (1986-08-01), Masuda et al.
patent: 4623392 (1986-11-01), Ou-Yang
patent: 4666519 (1987-05-01), Akiyama et al.
patent: 4822417 (1989-04-01), Kobayashi et al.
patent: 5279653 (1994-01-01), Kobayashi et al.
Hattori Yoshikazu
Kobayashi Kiyohiko
Morikubo Satoshi
Suzuki Nobuo
Klemanski Helene
Mitsubishi Pencil Kabushiki Kaibha
LandOfFree
Ethanol-based ink for marking pens does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ethanol-based ink for marking pens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ethanol-based ink for marking pens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1306734