JP3194003B2 - Correction fluid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a correction liquid which is applied to an arbitrary portion of a handwritten, printed or copied document to conceal the portion in white and to rewrite or reprint the surface.

[0002]

2. Description of the Related Art When this type of correction liquid is applied to a character of a copy made by an electrostatic copying machine which is most widely used in offices, the coating of the character portion is repelled due to the liquid repellency of the character. It tends to be thinner than other parts, and as a result, concealment tends to be insufficient. In addition, when applied to thermosensitive recording paper commonly used in OA equipment, there is a problem that the portion is colored (in most cases, the printing is black because the printing is black). The invention of a correction liquid for suppressing the coloring phenomenon of the heat-sensitive recording paper is proposed in Japanese Patent Publication No. 3-49309, but the correction liquid of the invention may not have sufficient dispersibility of the essential titanium oxide pigment. .

[0003]

SUMMARY OF THE INVENTION According to the present invention, the dispersibility of a titanium oxide pigment is good, and a sufficient concealing property is provided for copy characters on copy paper which is easy to repel the correction liquid, and the phenomenon of coloring of heat-sensitive recording paper is achieved. The purpose of the present invention is to provide a corrective solution which does not cause the problem.

[0004]

The correction fluid of the present invention has a composition in which a titanium oxide pigment or a titanium oxide pigment and an extender are dispersed in a vehicle in which a resin and an additive are dissolved in an organic solvent. The agent is alkyl ricinoleate
Tercarboxylate . The titanium oxide pigment may be either rutile type or anatase type titanium oxide, and is used in the range of 20 to 60% by weight of the total composition.
The resin is a film-forming resin that is soluble in an organic solvent used, and includes an acrylic resin, an alkyd resin, a vinyl resin, a polyester resin, a cyclized rubber, a styrene-butadiene elastomer, a vinyl alkyl ether resin, and an aliphatic hydrocarbon resin. And the like, and it is used in the range of 5 to 20% by weight in the whole composition. The additive is alkyl ricinoleate
Tercarboxylate , 0.05 to 3.0 in the total composition
% By weight, preferably in the range of 0.1 to 2.0% by weight. Ricinoleic acid alkyl ester carboxylate
Is an alkyl group having 1 to 10 carbon atoms,
The carboxyl group is a carboxylic acid residue having 1 to 10 carbon atoms.
is there. Wherein at additive considerable performance with the use of solely is exerted, of the combination of a compound selected from compounds group 1 to 5 wettability to a copy paper copy text improves the adhesion to the paper , And as a result, the concealment of the copy character is made more complete. 1 alkylene glycol monoester of alkenyl succinic acid 2 partial alkylolamine salt of polycarboxylic acid 3 dibasic acid monoester salt of long-chain polyaminoamide 4 alkylolamine salt of unsaturated fatty acid 5 partial carboxylate of polyamine The alkenyl group of the compound 1 has 2 to 1 carbon atoms.
And the alkylene glycol is ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol or pentapropylene glycol. The dibasic acid of compound 3 is maleic acid or fumaric acid. As the solvent, aliphatic hydrocarbons such as pentane, heptane, isoheptane, octane and isooctane; naphthenic hydrocarbons such as cyclohexane, methylcyclohexane and ethylcyclohexane; halogenated hydrocarbons such as 1,1,1-trichloroethane and tetrachloroethylene;
Ether solvents such as 1,4-dioxane, butyl ether and trioxane are used in an amount of 30 to 60% by weight in the whole composition.

[0005]

The ricinoleic acid alkyl ester carboxy
The rate exerts a good dispersing action of the titanium oxide pigment in the liquid, suppresses caking of the titanium oxide pigment, provides a dispersion that can be redispersed by light shaking even if the titanium oxide pigment settles, and The correction liquid is provided with a function of sufficiently concealing the copy characters on copy paper which is easy to repel, and giving a white coating film which does not cause a coloring phenomenon of the thermal recording paper.

[0006]

EXAMPLES Four examples of the above composition and the above-mentioned Japanese Patent Publication No. 3-49
Comparative Example 3 using three of the additives described in JP-A-309-309
The correction fluid of the example was prepared by the following method and used as a sample. Sample Preparation Method A predetermined amount of a resin and a solvent are charged into a container, sealed, sealed with a shaker, and stirred to prepare a resin solution. Next, an additive, a titanium oxide pigment or a titanium oxide pigment and an extender pigment and 1.5 times the total amount of glass beads are added. After shaking for 30 minutes with a paint shaker, the glass beads were filtered off to obtain a sample correction liquid. The following items were tested for the obtained sample correction liquid. 1) Dispersibility The dispersion state of the titanium oxide pigment in the obtained sample liquid is observed. Indication of results ◎: Homogeneous dispersion state ×: Agglomeration state 2) Performance of coating film Applied to copy characters on copy paper and printing on heat-sensitive recording paper with brush pen, and after coating film drying, concealment of characters Observe the condition and the presence or absence of coloring of the thermal recording paper. Result display Concealment ◎: Completely concealment The presence or absence of coloring of the thermal recording paper ◎: Not colored at all Further, it is determined whether or not it is possible to rewrite by writing characters on the coating film with a water-based ballpoint pen and an oil-based ballpoint pen. Find out. Result display A: Rewriting is possible (normal handwriting is obtained) Next, a sample liquid is dropped on high quality paper, and a coating film is formed with a 40 mil bar coater. After drying, the paper is folded and a load of 500 g is applied. After extending the fold and further bending at a right angle to the fold and performing the same operation as above,
The state of the coating film at the fold is observed with a loupe. Result display ◎: No substantial peeling is visible at the fold

Table 1 shows the composition of the sample correction liquid and the test results.

[Table 1] All the numerical values of the compositions in the tables are expressed in parts by weight, and the contents of the raw materials are described below according to the note numbers. (1) Rutile type titanium oxide (Taytone R-5N, product of Sakai Chemical Co., Ltd.) (2) Extender (aluminum silicate P-820, product of Degussa) (3) Paraloid B-67 (product of Rohm and Haas) (6) Alkylolamine salt of unsaturated fatty acid (Anti-
(7) Partial alkylolamine salts of polycarboxylic acids (Di
(8) maleic acid monoester salt of long-chain polyaminoamide (Disperbyk-101, product of Big Chemie) (12) polyoxyethylene (molecular weight 400) laurate (Neugen ET143, Daiichi Kogyo) (13) Polyoxyethylene (40 mol) castor oil (CO)
-40TX, Nikko Chemicals Co., Ltd. product) (14) Polyoxyethylene (10 mol) nonylphenol ether (Neugen EA-130T, Daiichi Kogyo Seiyaku Co., Ltd. product)

[0008]

As can be seen from the test results in Table 1, the correcting solution of the present invention, in addition to the good dispersibility of the titanium oxide pigment, also concealed the coated characters on the copy paper without any problem for the coating film, and showed the thermal recording. It exhibits effects such as not causing coloration of paper, and can be used without problems in office applications where recording by OA equipment is frequently used.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C09D 10/00

Claims (1)

(57) [Claims] 1. A correction liquid in which a titanium oxide pigment or a titanium oxide pigment and an extender are dispersed in a vehicle in which a resin and an additive are dissolved in an organic solvent, wherein the additive is
Correction liquid which is ricinoleic acid alkyl ester carboxylate .