JPH0613651B2 - Ink eraser - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to handwriting written on a non-absorbing surface such as glass, metal, pottery, resin plate, overhead projector film (hereinafter referred to as OHP film), The present invention relates to an ink erasing liquid that can easily and reliably erase drawn paint strokes (hereinafter simply referred to as handwriting).

(Prior Art) Conventionally, as a method of erasing the handwriting written on the non-absorption surface, an organic solvent such as alcohol, acetone, or xylol is included in the cloth or the like, or the organic solvent is filled. Erasing is performed by using an erasing marker or using an eraser containing an organic solvent.

(Problems to be solved by the invention) However, when an organic solvent is used, there is a problem that the handwriting is dissolved and spreads around the handwriting, and adjacent handwriting that does not need to be erased is erased. In addition, when using an eraser, there was a problem that the non-absorption surface was damaged, and a considerable amount of rubbing was required for complete erasing.

(Means for Solving Problems) Therefore, the present inventors have conducted intensive studies to solve the above problems and obtain an ink erasing liquid capable of easily and surely erasing the handwriting written on the non-absorbing surface. As a result, from the viewpoint that the above problems can be solved if the handwriting is dissolved, a film is formed, and it can be peeled off while incorporating the components of the handwriting, various studies have been made on the composition of the eraser solution to finally complete the present invention. . That is,
The present invention comprises an organic solvent and a higher fatty acid ester, a higher aliphatic hydrocarbon, a polyoxyethylene alkyl ether type nonionic surfactant and its derivative, a polyoxyethylene alkylphenol ether type nonionic surfactant and its derivative. A plurality of stripping aids selected from the group of stripping aids having a vapor pressure lower than that of the organic solvent; which is soluble in the organic solvent and which is included in any of the plurality of stripping aids. The gist of the invention is an ink erasing liquid containing at least a resin which is insoluble or hardly soluble.

(Function) Since the ink erasing liquid of the present invention comprises the organic solvent, the resin, and the plurality of peeling aids described above, when applied on the handwriting, first, the organic solvent dissolves the binder in the handwriting. , The handwriting component is taken into the erase solution. Next, the organic solvent evaporates, whereby the resin forms a film, and the handwriting component is incorporated into the film. Multiple peeling aids described above act synergistically on this film, and
In addition, since the entire film is embrittled by imparting wettability, it easily peels off by rubbing, and forms a film, it does not spread around the handwriting and it is possible to prevent accidental erasing of adjacent handwriting. Seem.

(Structure of the Invention) Each component of the present invention will be described in detail below.

Organic solvents include lower alcohols such as ethanol, propanol, isopropanol and butanol, lower aliphatic ketones such as methyl ethyl ketone and methyl isobutyl ketone, lower alcohol esters of lower fatty acids such as ethyl acetate and butyl acetate, benzene, toluene and xylene. Such as aromatic hydrocarbons, alicyclic alcohols,
Alkyl ethers of glycol and the like can be used, and these can be used alone or as a mixture of a plurality thereof, and the amount thereof is 65 to 95% by weight, preferably 75 to 85% by weight based on the total amount of the eraser solution.

As the peeling aid, a plurality of peeling aids selected from the following peeling aid groups are used to exert a synergistic effect.

The stripping aid group has a vapor pressure lower than that of the above-mentioned organic solvent, and higher fatty acid ester, higher aliphatic hydrocarbon, polyoxyethylene alkyl ether type nonionic surfactant and its derivative, polyoxyethylene. It is a group of compounds consisting of alkylphenol ether type nonionic surfactants and their derivatives. Specifically, the higher fatty acid ester is an ester of a higher fatty acid having 6 or more carbon atoms and an aliphatic alcohol having 2 or more carbon atoms. Preferred are isopropyl myristate, octyl palmitate, isooctyl stearate, isobutyl stearate, isobutyl oleate, and the like, and the amount thereof is 1-10% by weight, preferably 2-
8% by weight.

As the higher aliphatic hydrocarbons, paraffin hydrocarbons and olefin hydrocarbons that are liquid at room temperature are preferable, and liquid paraffin dialenes 124, 168, 208, 3
No. 0 (hereinafter, manufactured by Mitsubishi Kasei Co., Ltd.) and the like, and the amount thereof is 1 to 10% by weight, preferably 5 to 9% by weight based on the total amount of the erase solution.

Polyoxyethylene alkyl ether type nonionic surfactants and their derivatives, and polyoxyethylene alkylphenol ether type nonionic surfactants and their derivatives include polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, and polyoxyethylene. There are oleyl ether, polyoxyethylene stearyl ether, polyoxyethylene nonylphenyl ether, and the like. Specifically, Emulgen 105 (manufactured by Kao Atlas Co., Ltd.), Nikkor BC-2, and BO-2 (above, Nikko Chemicals ( Co., Ltd.), Emulgen 404, 408 (above, Kao Atlas Co., Ltd.), Nikko BS
-2 (manufactured by Nikko Chemicals Co., Ltd.), Neugen EA-5
No. 0, the same EA-70 (above, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) and the like, and the amount used is 1 to 10% by weight, preferably 3 to 8% by weight based on the total amount of the erase solution.

The resin is used for the purpose of imparting film forming ability to the ink erasing liquid, adhering property to the surface to be coated, and viscosity imparting to the ink erasing liquid. It is insoluble or sparingly soluble in any of the stripping aids, specifically, polyvinyl butyral, vinyl chloride-vinyl acetate copolymer, vinylidene chloride-vinyl chloride copolymer, ethyl cellulose and the like. Can be used alone or as a mixture of two or more, and the amount used is 1 to 15% by weight, preferably 5 to 10% by weight based on the total amount of the eraser solution.
% By weight.

In addition to the above components, if necessary, antiseptic / antifungal agents,
Various additives such as a wetting agent, a viscosity adjusting agent, an antifreezing agent, an antifoaming agent, and various general activators can be appropriately used.

In the method for producing an ink erasing liquid of the present invention, among the above-mentioned components, necessary amounts of components that meet the mutual conditions between the components described above are mixed and mixed and stirred with a stirrer such as a homomixer or a lab mixer. Can be easily obtained.

(Examples) The present invention will be described in more detail below with reference to examples, but "parts" in the examples means "parts by weight".

An ink erasing liquid was obtained by mixing and stirring the components of Examples 1 to 4 shown in Table 1 below with a homomixer.

<Supplementary explanation of Table-1> (1) PIO WHITE P-60: Daikyo Oil Co., Ltd., saturated hydrocarbon (2) Diarain 168: Mitsubishi Kasei Co., Ltd., olefinic hydrocarbon (3) Nikkor BO-2: Nikko Chemicals Co., Ltd.,
Polyoxyethylene oleyl ether (4) Neugen EA-70: manufactured by Dai-Ichi Kogyo Seiyaku Co., Ltd., polyoxyethylene nonylphenyl ether (5) Emulgen 306P: manufactured by Kao Atlas Co., polyoxyethylene stearyl ether (6) Denka Butyral # 2000-L: manufactured by Denki Kagaku Kogyo Co., Ltd., polyvinyl butyral (7) vinyl chloride-vinyl acetate copolymer: manufactured by Union Carbide Co. (effect of the invention) The inks obtained in Examples 1 to 4 above. The eraser solution and ethanol as a comparative example are filled with a pen tip into a fiber core batting type marker to prepare a sample.
2 shows.

Oil-based marker (Pentel pen <medium character>, N50-A, Pentel Co., Ltd.) and OHP marker (Forefilm PM) on glass plate, OHP film and aluminum plate respectively.
4S-A, made by Pentel Co., Ltd., write 9 characters vertically and 3 rows horizontally and 3 columns in total, and dry, and apply the erase solution of Examples 1 to 4 and Comparative Example to the character located at the center with the above sample. After drying, it was wiped off with a cloth or the like, and the center character was completely erased and had no effect on the surrounding eight characters, and ◯ was marked, and the surrounding eight characters were blurred or erased were marked with x.

As described above, the ink erasing liquid of the present invention can easily erase the handwriting written on the non-absorbing surface such as glass, metal, pottery, resin plate, OHP film and the like without affecting surrounding handwriting. It is excellent.

Claims (1)

[Claims] 1. An organic solvent; higher fatty acid ester, higher aliphatic hydrocarbon, polyoxyethylene alkyl ether type nonionic surfactant and derivative thereof, polyoxyethylene alkylphenol ether type nonionic surfactant and derivative thereof A plurality of stripping aids contained in the compound group consisting of and having a vapor pressure lower than that of the organic solvent; any of the plurality of stripping aids soluble in the organic solvent; An ink eraser containing at least a resin that is insoluble or sparingly soluble.