JPS644548B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a correction fluid, and more specifically, the present invention relates to a correction fluid that enables rewriting of the paint film of a correction area with a fountain pen, felt-tip pen, etc. using water-based ink, and has excellent drying properties for rewritten handwriting. This invention relates to a correction fluid that allows a coating film to be obtained.

Conventionally, areas that have been corrected with oil-based correction fluid are hydrophobic, so when rewriting with a fountain pen, felt-tip pen, etc. that uses water-based ink, the water-based ink is repelled, making it difficult or possible to rewrite. However, there was a problem that the handwriting did not dry properly.

In order to solve the above-mentioned problems, the present inventors have finally completed the present invention as a result of various studies on substances to be added to oil-based correction fluid. The gist of the invention is a correction fluid consisting of a resin that can be used in an organic solvent and an imidazoline derivative represented by the following general formula.

(R ₁ represents an alkyl group, a phenyl group, or a fatty acid residue, and R ₂ represents a hydrogen atom or an alkyl group.) In the present invention, by using an imidazoline derivative represented by the general formula, It is not clear why when writing with water-based ink on the painted surface of a spot, it is possible to re-write without repelling the water-based ink and the re-written handwriting dries well, but the 2nd position of the imidazoline derivative and The imidazoline derivative has the same function as a nonionic surfactant because the substituent at the / or 4th position acts as a lipophilic group and the hydroxyl group of the hydroxyethyl group at the 1st position acts as a hydrophilic group. This function and the above-mentioned hydrophilic hydroxyl function allow the ink to adhere well to the paint film, prevent the ink from repelling, and further improve the penetration of the ink into the paint film, resulting in better drying of handwriting. It seems to be. Further, the imidazoline derivative in the present invention has the same function as a nonionic surfactant as described above, and is thought to contribute to improving pigment dispersibility and preventing sedimentation.

The composition of the present invention will be explained below.

The white pigment is used to hide handwriting, and various titanium oxides such as rutile type and anatase type can be used, and commercially available ones include:
Taitone SR-1, Taitone R-650, Taipei R-3L, Taipei R-310, A-110, A-150, Taipei R-5N (manufactured by Sakai Chemical Industry Co., Ltd.) Taipeku R-580, Same R
-550, R-930, A-100, A-220 (and above,
(manufactured by Ishihara Sangyo Co., Ltd.), Kronos KR-310, KR-
380, KR-480, KA-10, KA-20, same
Examples include KA-30 (manufactured by Titan Kogyo Co., Ltd.), and in consideration of other components, the amount used is preferably 20 to 50% by weight based on the total amount of correction fluid.

Organic solvents are used for dissolving resins, adjusting viscosity, etc., and include hydrocarbons such as toluene, xylene, n-heptane, n-octane, cyclohexane, and methylcyclohexane, 1,1,1-trichloroethane, and tetrachloroethane. Halogenated hydrocarbons such as chlorethylene, ethers such as 1,4-dioxane, n-butyl ether, trioxane, ketones such as ethyl methyl ketone and methyl-n-propyl ketone, esters such as propyl formate and ethyl acetate, etc. Considering the drying time of the paint film in the corrected area, it is preferable to use one with a boiling point of 70°C to 150°C, and it can be used alone or in combination, and the amount used is 30 to 150°C based on the total amount of correction liquid. 60% by weight is preferred.

Note that if a paraffinic hydrocarbon such as n-heptane or n-octane or a naphthenic hydrocarbon such as cyclohexane or methylcyclohexane is used as an organic solvent, it is 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. 5 to 20% by weight is preferred.

The imidazoline derivative represented by the general formula, which is the gist of the present invention, can be obtained by adding ethylene oxide or ethylene carbonate to the 1st position of the imidazoline substituted at the 2nd and/or 4th positions, or by substituting it with ethylene chlorohydrin. , 1-hydroxyethylated product, which may be commercially available or synthesized as described above,
If the amount used is less than 0.1% by weight based on the total amount of correction fluid, the effect may be small, and if it is more than 3% by weight, no further effect can be expected.
Weight percent is preferred.

In addition to the above ingredients, coloring pigments are added to match the color tone with the writing surface such as paper, and extender pigments such as silica and calcium carbonate are added to improve hiding power.
Dispersants and anti-settling agents are used to stabilize the dispersion of pigments.
A thickener may be added to adjust the viscosity, a plasticizer may be added to adjust the hardness of the coating film, and a flow improver or leveling agent may be added in small amounts to improve coating performance.

The correction fluid of the present invention is produced by mixing the above components in a ball mill,
It can be 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 described in more detail with reference to Examples, where "parts" in the Examples indicate "parts by weight."

Example 1 Kronos KR-380 (white pigment) 60 parts Dianal BR105 (manufactured by Mitsubishi Rayon Co., Ltd., acrylic resin) 15 parts xylene 70 parts imidazoline derivative 1 part (R1 = coconut oil fatty acid residue, R2 = H Imidazoline derivatives, Kawaken Huain Chemical Co., Ltd.
Mizukasil P-801 (Mizusawa Chemical Co., Ltd., fine silica)
2 parts Each of the above components was dispersed in a ball mill for 24 hours to obtain a correction liquid.

Example 2 Kronos KR-380 60 parts Paraloid B-66 (manufactured by Rohm & Haas, acrylic resin) 12 parts 1,1,1-trichloroethane 110 parts Imidazoline derivative 1 part (2.4 position where R1=C11H23, R2=H) 1 of converted imidazoline (C11ZL, manufactured by Shikoku Kasei Kogyo Co., Ltd.)
Substituted with ethylene chlorohydrin at position. ) Mizukasil P-801 2 parts MA-100 (manufactured by Mitsubishi Kasei Corporation, carbon black)
0.02 parts Each of the above components was dispersed in a ball mill for 24 hours to obtain a correction liquid.

Example 3 Kronos KR-480 60 parts Paraloid B-67 (manufactured by Rohm & Haas, acrylic resin) 12 parts Methylcyclohexane 40 parts Ethylcyclohexane 20 parts Imidazoline derivative 1 part (2.4-position substitution where R1=C2H5, R2=CH3 Imidazoline (2E/4MZL, manufactured by Shikoku Kasei Kogyo Co., Ltd.)
The 1st position of is substituted with ethylene chlorohydrin. ) Mizukashiru P-801 1.5 parts DOA (Daihachi Kagaku Co., Ltd., plasticizer) 4 parts The above components were dispersed in a ball mill for 24 hours to obtain a correction fluid.

Example 4 Kronos KR-380 60 parts Dianal BR-105 15 parts Methylcyclohexane 40 parts Pegazol LA (Mobil Oil Co., Ltd., paraffinic solvent) 20 parts Imidazoline derivative (same as Example 1)
1 part Mizukasil P-801 1.5 parts DOA 3 parts Polyflow S (Kyoeisha Yushi Co., Ltd., flow improver)
0.2 parts Each of the above components was dispersed in a ball mill for 24 hours to obtain a correction liquid.

Comparative Examples 1 to 4 Correction fluids were obtained in the same manner as in Example 1, except that the imidazoline derivatives of Examples 1 to 4 were removed.

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

Claims (1)

[Scope of Claims] 1. A correction fluid comprising a white pigment, an organic solvent, a resin soluble in the organic solvent, and an imidazoline derivative represented by the following general formula. (R ₁ represents an alkyl group, phenyl group, or fatty acid residue; R ₂ represents a hydrogen atom or an alkyl group.)