JPH07186592A - Solid corrector - Google Patents

Abstract

PURPOSE:To improve a wettability with respect to water ink providing a solid corrector consisting of a specific range of white color pigment, wax and an alcohol soluble modified polyamide. CONSTITUTION:A solid corrector is obtained, which consists of 40-90wt.% white color pigment such as zinc oxide, titanium oxide or the like, 60-95wt.% bees wax, carnauba wax, paraffin wax or the like, and 5-40wt.% alcohol soluble polyamide modified by replacing a hydrogen of an amide bond with methoxymethyl. As a result, rewriting can be done easily with a hard coated- film without repelling of water ink.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to handwriting of water-based inks such as fountain pens, water-based felt-tip pens and water-based ballpoint pens, oil-based ink marks such as oil-based ballpoint pens and oil-based felt-tip pens, and printing on typewriters and printers and other printed matter. The present invention relates to a solid correction tool for concealing corrections.

[0002]

2. Description of the Related Art Conventionally, handwriting of water-based ink or oil-based ink,
And when hiding and correcting images etc. by various printing,
A white pigment, a resin, and a correction liquid containing a volatile solvent as a dispersion medium for dispersing the white pigment as a main component, covering and hiding the coating on the correction portion, and then the coating film of the correction liquid is completely dried before the coating film. The method of making corrections by rewriting etc. was adopted above.

However, when the above-mentioned correction liquid is used, it takes ten to several tens of seconds from the application of the correction liquid to the drying, so that the speed of rewriting is insufficient. This waiting time is the time required for the solvent to evaporate. Therefore,
To reduce this waiting time, a highly volatile solvent may be used. However, in order to substantially eliminate the waiting time, it is basically impossible with a correction fluid using a solvent.

Therefore, in order to eliminate the waiting time,
The minimum requirement is that the repair tool itself is a solid material in which the hiding material is dispersed, and that the solid material is coatable. Various such solid materials have been proposed.
For example, Japanese Patent Application Laid-Open No. 4-193599 discloses a solid correction tool in which crystalline cellulose is added to a Dermatt graph made of a white pigment made of titanium oxide and waxes such as wood wax, carnauba wax and paraffin wax. There is.

[0005]

[Patent Document 1] Japanese Patent Application Laid-Open No. 4-1
The solid correction tool described in Japanese Patent No. 93599 has good adhesion of the coating film and does not cause peeling, but since the coating film contains waxes as a main component, it exhibits hydrophobicity and has low hardness. Therefore, at the time of correction, when using a writing instrument that uses a water-based ink, the coating film has poor wettability with the water-based ink, so that cratering of the handwriting occurs, or when re-writing with a hard writing instrument such as a ballpoint pen, If you do not write with a light writing pressure, the coating film will be scraped off, the rotation of the ball will be insufficient due to the low hardness, and the handwriting will be interrupted or thinned, and the coating film will easily grow due to abrasion of your fingers. As a result, there is a problem that the hiding effect of the coating film is reduced and the vicinity of the coated portion is stained.

[0006]

The present invention has been made based on these circumstances. Basically, the advantages of a solid correction tool are fully utilized, and when the correction is made with a water-based ink, the handwriting There is no cissing and good rewriting is possible,
The coating film was scraped off by rewriting with a hard writing instrument or rubbing with fingers, etc., and after earnest research to obtain a coating film having strength and fixing property that does not easily extend, it was found that wax They have found that the combination with an alcohol-soluble modified polyamide is optimal, and finally completed the present invention.

[0007] That is, the gist of the present invention is a solid correction tool comprising at least a white pigment, a wax, and an alcohol-soluble modified polyamide.

The present invention will be described in detail below. The white pigment used in the present invention is used as a hiding agent for handwriting and images, and examples thereof include zinc oxide, barium sulfate, calcium carbonate, and titanium oxide, but titanium oxide is most preferably used from the viewpoint of hiding power. To be Titanium oxide can be used in various types such as rutile type and anatase type, and specifically, Titone SR-1, R-650, R-3L, R-310,
Same A-110, same A-150, same R-5N (above, Sakai Chemical Industry Co., Ltd.), Taipaque R-580, same R-55.
0, R-930, A-100, A-220 (all manufactured by Ishihara Sangyo Co., Ltd.), Kronos KR-310, K
R-380, KR-480, KA-10, KA-
20, KA-30 (above, manufactured by Titanium Industry Co., Ltd.) and the like. These white pigments can be used alone or in admixture of two or more, and the amount used varies depending on the type of white pigment, but considering the hiding power for handwriting, etc. % Or more and 90% by weight or less is desirable. If the amount of white pigment used is less than 40% by weight, the hiding power for handwriting and images may be insufficient and characters may be visible, and 90% by weight.
This is because the coating film-forming ability may be deteriorated when it exceeds the range.

The wax is used for improving the coating performance, and it is an animal wax such as beeswax, spermaceti, or white wax, a plant wax such as candelilla wax, carnauba wax, or wood wax, Mineral wax such as montan wax and ozokerite, paraffin wax,
Natural wax such as petroleum wax such as microcrystalline wax, Fischer-Tropsch wax, low molecular weight polyethylene and derivatives thereof, montan wax, paraffin wax, each derivative of microcrystalline wax, cetyl alcohol, stearic acid, polyethylene glycol stearate, Examples thereof include synthetic waxes such as castor wax. These waxes can be used alone or in admixture of two or more kinds, and the amount thereof is preferably 60 to 95% by weight based on the total amount of the solid correction tool excluding powder such as pigment.

The alcohol-soluble modified polyamide is used to prevent cratering of the handwriting due to the water-based ink and to increase the strength of the coating film and improve rewriting performance. In order to modify a polyamide resin to be soluble in alcohol, it is a generally known method to replace hydrogen of an amide bond with a methoxymethyl group, but a modified polyamide obtained by another method for making it soluble in alcohol. Can also be used. Examples of commercial products that are specific examples of the alcohol-soluble modified polyamide include Toresin F30 and MF-3 in which hydrogen of an amide bond is replaced with a methoxymethyl group.
0, the same EF-30T (above, Teikoku Chemical Industry Co., Ltd.) and BCI800 (Building Chemical Co., Ltd.),
AQ-nylon A-50, the same P-50, the same K-90, the same K-80, the same K-40 (above, Toray Co., Ltd. make) etc. are mentioned. These may be used alone or in admixture of two or more, and the amount thereof is preferably 5 to 40% by weight based on the total amount of the solid correction tool excluding powder such as pigment. If the amount is less than 5% by weight, cissing is likely to occur on the handwriting with the water-based ink, and if the amount is more than 40% by weight, the cohesive force of the correction tool itself is too strong to form fine scraps during application and lower the fixing force.

In addition to the above components, it is needless to say that they may be used in combination with fillers such as mica, clay, kaolin, etc., coloring agents such as organic and inorganic colored pigments, and even surfactants, if necessary.

In the present solid correction tool, the above components are heated and mixed with stirring, and if necessary, kneaded with a kneader such as a kneader or a roll mill, and then poured into a mold in a molten state, or injection / pressurization or extrusion. It can be obtained by cooling and solidifying.

[0013]

The alcohol-soluble modified polyamide used in the solid correction tool according to the present invention is water resistant, but since it has hydrophilicity, it imparts hydrophilicity to the coating film and does not dissolve in the water-based ink. It improves the wettability against and reduces the occurrence of handwriting craters during rewriting. Furthermore, since it has a strong cohesive force by itself, a tough coating film can be obtained, and the coating film can be written without being easily scraped off by the pen tip of a writing instrument, and the coating film can be obtained by rubbing with fingers or the like. Does not grow.

[0014]

EXAMPLES Examples of the present invention will be described below. Example 1 Titanium oxide (Titone SR-1, manufactured by Sakai Chemical Industry Co., Ltd.) 80 parts by weight 130 ° F paraffin wax 18 parts by weight Alcohol-soluble modified polyamide (Toresin F30, manufactured by Teikoku Chemical Industry Co., Ltd.) 2 parts by weight The ingredients were kneaded and dispersed with a heated two roll, poured into a mold and cooled to obtain a solid correction tool.

Example 2 Titanium oxide (Taipaque R550, manufactured by Ishihara Sangyo Co., Ltd.) 75 parts by weight Castor wax 17 parts by weight Microcrystalline wax 6 parts by weight Alcohol-soluble modified polyamide (AQ-nylon K-90, manufactured by Toray Industries, Inc.) ) 3 parts by weight The same components were used as in Example 1 to obtain a solid correction tool.

Example 3 Titanium oxide (Kronos KR-380, manufactured by Titanium Industry Co., Ltd.) 70 parts by weight Diheptadecyl ketone (wax) 18.5 parts by weight 130 ° F paraffin wax 7 parts by weight Alcohol-soluble modified polyamide (AQ) -Nylon P-50, manufactured by Toray Industries, Inc. 1.5 parts by weight Alcohol-soluble modified polyamide (AQ-Nylon A-50, manufactured by Toray Industries, Ltd.) 1 part by weight Ethylene-methyl acrylate copolymer (XG-600S) 2 parts by weight of the above components were obtained in the same manner as in Example 1 to obtain a solid correction tool.

Example 4 Titanium oxide (Kronos KR-310, manufactured by Titanium Industry Co., Ltd.) 65 parts by weight Wood wax 6 parts by weight Polyethylene wax (Neowax L, manufactured by Yasuhara Chemical Co., Ltd.) 20 parts by weight Alcohol-soluble modified polyamide (Toresin) MF-30, manufactured by Teikoku Kagaku Sangyo Co., Ltd. 5 parts by weight Surfactant (Rikemar S-100, manufactured by Riken Vitamin Co., Ltd.) 4 parts by weight The above components were obtained in the same manner as in Example 1 to obtain a solid correction tool. It was

Comparative Example 1 A solid repair tool was obtained in the same manner as in Example 1 except that the resin F30 of Example 1 was omitted.

Comparative Example 2 A solid correction tool was obtained in the same manner as in Example 2 except that AQ-nylon K-90 of Example 2 was omitted.

Comparative Example 3 A solid repair tool was obtained in the same manner as in Example 3 except that AQ-nylon P-50 and A-50 of Example 3 were omitted.

Comparative Example 4 Example 4 except that the resin MF-30 of Example 4 was omitted.
In the same manner as above, a solid correction tool was obtained.

Using the solid correction tools obtained in Examples 1 to 4 and Comparative Examples 1 to 4, a handwriting repelling test, a rewriting property test and a coating film fixing property test were conducted. The results are shown in Table 1.

[0023]

[Table 1]

Handwriting repelling test: A commercially available black water-based felt-tip pen (S-520, Pentel Co., Ltd.) is applied to the modified surface of the test piece.
Manufactured) was used to write a straight line with a writing load of 100 g, and the handwriting was visually evaluated. Specimen: A piece of wood-free paper with the above water-based felt-tip pen on it, which was completely hidden using a solid correction. ⊚: The handwriting is similar to the handwriting written on the paper. B: Good handwriting with almost no repelling. Δ: A handwriting part where the handwriting part is thin is part of the weight. X: Handwriting with a lot of cissing.

Rewriting ability test (coating strength test): A commercially available black oil-based ballpoint pen (BK-70, manufactured by Pentel Co., Ltd.) was used on the modified surface of the test piece, and the writing load was changed at intervals of 50 g to 25 g. A straight line was written and the handwriting was observed. The coating film was slightly depressed, but the maximum writing pressure at which the handwriting with no practical problems was obtained was defined as the coating film strength. Test piece: A piece of wood-free paper on which letters were written with the above-mentioned oil-based ballpoint pen, and the letters were completely hidden by using a solid correction tool.

Coating film fixability test: The modified surface of the test piece was rubbed with a finger while applying a pressure of 2 kg to observe the state of the coating film. Test piece: The same as that used for the rewriting property test. ○: No change. Δ: Elongation of the coating film occurs. X: Elongation and peeling of the coating film occur.

[0027]

As described in detail above, the solid correction tool according to the present invention has no cissing of the water-based ink, the coating film is hard and can be easily rewritten, and the fixing property is excellent. It has excellent characteristics that there is no stain around the coated part due to elongation of the coating film.

Claims (1)

[Claims] 1. A solid correction tool comprising at least a white pigment, a wax, and an alcohol-soluble modified polyamide.