JPS5876471A - Ink eraser - Google Patents

Abstract

PURPOSE:To obtain an ink eraser capable of rewriting with an aqueous ink on erased sites, also with high dryability after the rewriting, comprising an ethylene oxide-added fluorine-based surface active agent. CONSTITUTION:The objective ink eraser comprising (A) a white pigment (for example, pref. 20-50wt%, based on the total amount of the eraser, of a rutile- or anatase-type titanium dioxide), (B) an organic solvent (for example, pref. 30- 60wt% of toluene, tetrachloroethylene, 1,4-dioxane, etc.), (C) an organic solvent- soluble resin (e.g., 5-20wt% of an acrylic resin), and (D) pref. 0.1-3wt% of an ethylene oxide-added fluorine-based surface active agent.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a correction fluid.2. More specifically, it relates to a correction fluid that makes it possible to rewrite the paint film on the corrected area by using water-based ink, sine bene, etc., and also provides a paint film that has excellent drying properties for rewritten handwriting. It is something.

Areas that were previously corrected using oil-based correction fluid.

Because it is hydrophobic, if it is rewritten with a fountain pen or felt-tip pen that uses water-based ink.

There was a problem in that the water-based ink was repelled, making it difficult to write again, or even if it was possible to write again, the handwriting dried poorly.

The present inventors aimed to solve the above-mentioned problems.

As a result of various studies on substances to be added to oil-based correction fluid,
This invention has finally been completed.

The gist of the present invention is a correction fluid comprising a white pigment, an organic solvent, a resin soluble in the organic solvent, and an ethylene oxide-added fluorine-based surfactant.

Why is it possible to use an ethylene oxide-added fluorosurfactant in the present invention?

When writing on the paint film of the repaired area using water-based ink.

It is possible to rewrite the water-based ink without repelling it, and it is unclear whether the rewritten handwriting dries well, but the perfluoroalkyl group, which is the hydrophobic part of the ethylene oxide-added fluorine surfactant, Embossed on the surface 1 By lowering the surface tension, the ink adheres better to the paint film, and the hydrophilic part prevents the ink from repelling, and also improves the penetration of the ink into the paint film, improving the drying of handwriting. It seems to be.

Below, nine compositions of the present invention will be explained.

The white pigment is used to hide handwriting, and various titanium oxides such as rutile type and anatase type can be used. Commercially available ones include Titone 5R-1,
Same R-6501 Same 1 (, -3L, Same 1 (, -310, Doujin-110, Doujin-150, Same R-5N (all manufactured by Sakai Chemical Industry ■) Tybake R-580. Same R-550, same 1'L -930, A-100, A-220C or higher.

Ishihara Sangyo ■), Cronos KR-510. Same KR-58
0, KR-480. Same KA-10゜ Same KA-20
e, KA-50C or higher, manufactured by Titan Engineering Co., Ltd.), etc. Considering other components, the amount used is preferably 20 to 50% by weight based on the total amount of correction fluid.

Organic solvents are commonly used for dissolving resins, adjusting viscosity, etc., and include toluene, xylene, and n-hep. Hydrocarbons such as n-octane, cyclohexane, methylcyclohexane, 1.1. ．． Halogen hydrocarbons such as 1-trichloroethane and tetrachlorethylene, ethers such as 1,4-dioxane, n-butyl ether, trioxa/etc., ketones such as ethyl methyl ketone and methyl-n-furobyl ketone, propyl formate, and acetic acid. There are esters such as ethyl, and those with a boiling point of 70°C to 150°C are preferable considering the drying time of the paint film in the corrected area.They can be used alone or in combination, and the amount used is determined by the correction liquid. It is preferably 30 to 60% by weight based on the total weight of 1.

In addition, if rough hydrocarbons such as n-hebutane and n-octane, and naphthenic hydrocarbons such as cyclohexane and methylcyclohexane are used as organic solvents,
It is also possible to correct handwriting made with oil-based ink.

Examples of resins soluble in organic solvents include acrylic resins, alkyd resins, vinyl resins, and polyester resins, which can be used alone or in combination, and the amount used is based on the total amount of correction fluid. It is preferably 5 to 20% by weight.

The ethylene oxide-added fluorinated surfactant, which is the gist of the present invention, can be produced by electrolytic fluorination method, telomerization method,
Perfluoro-fluoride obtained by oligomerization method
It is a nonionic fluorine-based surfactant made by adding ethylene oxide to a carbon compound, and commercially available products include Ftardient 200. 251 (above,
■Made by Neos), Surflon S-341 (manufactured by Asahi Glass ■),
Florado FC-430 (manufactured by 5M) can be used alone or in combination, and if it is less than 0.1% by weight based on the total amount of correction fluid, it may not be effective, and if it is more than 3% by weight, it is more effective. Because the effects cannot be expected.

0.1 to 3% by weight is preferred.

In addition to the above-mentioned ingredients, coloring pigments are used to match the color tone with the writing surface such as paper, extender pigments such as silica and calcium carbonate are used to improve the hiding power, and to improve the dispersion stability of the pigments. Small amounts of dispersants and anti-settling agents, thickeners to adjust viscosity, plasticizers to adjust the hardness of the coating, and flow improvers and leveling agents to improve coating performance. Can be added.

The correction fluid of the present invention is prepared by ball milling each of the above components.

It is obtained by dispersing and mixing using a stirring disperser such as an attritor or a sand glider.

The thus obtained coating film at the location corrected with the correction fluid of the present invention can be rewritten with water-based ink, and the rewritten handwriting dries well.

Hereinafter, the present invention will be explained in more detail according to Examples.
In the examples, "parts" and "." indicate "parts by weight."

Kronos KR-! +80 (Titan Kogyo (produced by Orthyl type titanium) 65 parts Paraloid B-66 (manufactured by Rohm & Co., Ltd., acrylic resin) 12 parts 1, 1.1-) Lichloroethane 120 parts 70 Lard FO-450
(Manufactured by 3M Company) 1 part Mizukasil P-80
1 (manufactured by Mizusawa Chemical Industry ■, fine silica) 2s homogenol L-18 (manufactured by Kao Soap Co., Ltd. 2 dispersant) 09
A correction liquid was obtained by dispersing 5 parts of each of the above components in a ball mill for 24 hours.

Example 2 Kronos KR-38ON (manufactured by Titan Kogyo ■, rutile type titanium) 60 parts Paraloid B-66 12 parts Xylene 100 parts Surf 0-ON 8-541 (manufactured by Asahi Glass ■)
5 parts Mizukasil P-80 12 parts MA-100 (manufactured by Mitsubishi Chemical Corporation, carbon black)
A correction fluid was obtained using 0.05 part of the above ingredients in the same manner as in Example 1.

Example 3 Kronos KR-580 60 parts Paraloid B-67 (manufactured by Rohm & Haas, acrylic resin) 15 parts Methylcyclohexane
A correction fluid was obtained in the same manner as in Example 1 using 110 parts Surfon S-3410, 5 parts Mizukashiru P-8011, 5 parts MA-100α, and 05 parts or more of each of the above components.

A correction fluid was obtained in the same manner as in Example 1, except that 4 parts of DOA (manufactured by Daihe Kagaku Kogyo Co., Ltd., plasticizer) was further added to the composition of Example 1.

Comparative Examples 1 to 4 Correction fluids were obtained in the same manner as in Examples except that the ethylene oxide-added fluorine surfactants of Examples 1 to 4 were removed.

Examples 1-4. Table 1 shows the test results of the hiding rate, rewriteability, coating film drying time, and touch drying time of the correction fluids of Comparative Examples 1 to 4.

Table 1 Hata 1 Hiding rate Hiding rate measuring paper (JI8 to 5400) After coating with a K3 mil applicator and drying, the 45;ol' diffuse reflectance was measured and calculated.

Hata 2 Re-writability Write on the paint film of the repaired area with water-based ink (manufactured by Pentel ■, ballpoint pen B76), and if there is any reluctance in the handwriting,
Those without were marked as "no".

*5 Paint film drying time After application with a 3 mil applicator on high quality paper.

The time required for the paint surface to dry and the correction fluid to stop adhering to the finger was measured.

Urn 4 Dry time to the touch Write on the paint film of the repaired area using the above water-based ink.

After printing, the time until the ink stopped adhering to the fingers was measured.

As described above, the coating film of the areas corrected using the correction fluid of the present invention can be rewritten with water-based ink, and the rewritten traces dry well.

Of course, it is also possible to use it only for rewriting with oil-based ink or correcting handwriting made with water-based or oil-based ink.

Patent applicant Pentel Co., Ltd. Procedural amendment (spontaneous) July 12, 1952 Commissioner of the Japan Patent Office Kazuo Wakasugi 1, Indication of the case 1982 Patent Application No. 173925 2, Amendment of the name of the invention Liquid 3 , Relationship with the case of the person making the amendment Patent applicant address: 7-2-5 Nihonbashi Ozuna-cho, Chuo-ku, Tokyo Column for detailed explanation of the invention in the specification subject to the amendment & page 5, line 18 of the specification of the contents of the amendment Correct the “concealment power” of the eyes with “concealment power” 0

Claims (1)

[Claims] A correction liquid consisting of a white pigment, an organic solvent, a resin soluble in the organic solvent, and an ethylene oxide-added fluorine surfactant.