JPS6099694A - Colored composition for recording sheet - Google Patents

Abstract

PURPOSE:To provide a novel titled composition capable of being applied to a base extremely easily and excellent in light fastness or the like after color development, comprising a colorless leuco dye, a solvent, a body, a higher aliphatic alkylenediamine and a wax. CONSTITUTION:The objective composition is obtained by mixing (A) a colorless or light-colored leuco dye, e.g., a xanthene compound such as Rhodamine B anilinolactam, (B) a solvent, e.g., alkylated naphthalene, (C) a body, e.g., silica, (D) a higher aliphatic alkylenediamine, e.g., N-alkyltrimethylenediamine, and (E) a wax. The color of the composition can be developed by bringing the composition into contact with an acidic substance such as acid clay. EFFECT:Partial coating can be also conducted easily. The composition does not contaminate clothings in any manner, and is excellent in view of environmental hygiene.

Description

[Detailed Description of the Invention] In more detail, what is a pressure-sensitive recording sheet or carbon paper?
This invention relates to different types of novel coloring compositions for recording sheets.

Recording sheets are broadly classified into pressure-sensitive copying paper, heat-sensitive recording paper, and carbon paper. Pressure-sensitive copying paper is made by dissolving a colorless or light-colored leuco dye in a solvent such as alkylated naphthalene, and then using various capsule manufacturing methods such as the coacervation method and the kaiju method to inject the leuco dye into microcapsules. Step 3: The microcapsules are manufactured by coating them on a support such as a nail. The thermosensitive recording paper is prepared by dispersing a micronized leuco dye, a convex/evening substance such as bisphenol A, and a dispersion of a chiselinder as a support.
: Manufactured by I/C coating. Single carbon paper is a thin support coated on one or both sides with a mixture of carbon and oil or wax. However, these recording sheets, such as pressure-sensitive copying paper, are expensive because they go through a complicated microencapsulation process, and they also have the disadvantage that the microcapsules are destroyed and colored by unexpected pressure. - Carbon paper had drawbacks such as dirt on the background and coloring due to unexpected rubbing.

The present invention relates to a novel coloring composition for a recording notebook which improves the drawbacks of the conventional recording notebook Q) and which can be applied onto the support 44 by a very simple operation. That is, the present invention comprises a. This is a coloring composition for a recording sheet consisting of a colorless or light-colored leuco dye B, a solvent C, an extender pigment (+), a higher aliphatic alkylene diamine, and a wax C.The coloring composition of the present invention is originally colorless, but It is a composition that becomes colored when it comes into contact with an acidic substance.

The leuco dyes used in the present invention are those used in conventional pressure-sensitive and thermal recording papers, including triarylmethane compounds, diphenylmethane compounds, xanthine compounds, thiazine compounds, and oxazine compounds. Compounds are known.

Some examples of these include 3,3 bis(p-dimethylaminophenyl) as a triarylmethane compound.
-6-dimethylaminophthalide COV L ], 3,3
-bis(p-dimethylaminophthalide), 3-(p-trimethylaminophenyl)3(1,3-dimethylindole-phthalide, 3-(p-trimethylaminophenyl)-3-
(2-methylindol-3-yl) phthalide, etc., and xanthine compounds include rhodamine B-anilinolactam, rhodamine (1) nitroanilino)lactam, rhodamine + ( (+) -chloroanilino)lactam, 2-diynnoramino- 6-diethylaminofluorane, 2-anilino-6-dinithylaminofluorane, 2-anilino-3-methyl-6-dinithylaminofluorane, 2-anilino-3-methyl-6-(N-cyclohexyl -N-methyl)aminofluorane, 2-.

-chloroanilino-6-dinithylaminofluorane, 2
-0-Chloroanilino-6-sibutylaminofluoran, 2-anilino-3-methoxy-6-sibutylaminofluoran, etc., and thiazine compounds include benzoylleucomethylene blue, p-nitrobenzylleucomethylene blue, etc. , as oxazine compounds,
3,7-bis(diethylamino)-10-benzoyl-
Phenoxazine, 3,7-bis(diethylamino)-1
0-acetylphenoxazine, etc., and spiro compounds include 3-methylspirodinaphthopyran, 3-benzylspiro-dinaphthopyran, and 3-propylspiro-dinaphthopyran.
Examples include dipenzobilan.

These may be used alone or in combination.

Further, the solvent used in the present invention is one that dissolves the above-mentioned leuco dye and makes it into a liquid or semi-solid state, and usually,
Synthetic oils such as alkylated naphthalene, alkylated diphenyl, alkylated diphenylmethane, alkylated terphenyl, mopil oil, and chlorinated chilafin used in pressure-sensitive recording paper, vegetable oils such as cotton oil and castor oil, animal oils, mineral oils, or It is a mixture of these.

Examples of extender pigments include calcium carbonate, aluminum silicate, calcium silicate, magnesium silicate, aluminum hydroxide, zinc white, barium sulfate, diatomaceous earth, and warping force.

Examples of higher aliphatic alkylene diamines include N-algyl trimethylene diamine, N-alkyltetramethylene diamine, N-alkylpentamethylene diamine,
Examples include N-alkylhexamethylene diamine, and the alkyl group has 12 to 20 carbon atoms, such as those obtained from beef tallow, soybean oleyl and coconut oil.

In addition, waxes used in the present invention include beeswax,
Animal waxes such as shellac wax, vegetable waxes such as carnanocellulose, paraffin waxes, petroleum waxes such as microcrystalline wax, polyethylene wax and other synthetic waxes are used.

Furthermore, in the present invention, in order to improve the dispersion of these materials, a dispersant f may be used as necessary, and stearic acid or the like is used as the dispersant.

The coloring composition for a recording sheet of the present invention is prepared by dissolving (a) a leuco dye in (b) a solvent or clouding it with X7, and then (c)
) Extender pigment, (d) higher aliphatic alkylene diamine, and (e) waxes are added, dispersed and mixed well using a mixing means such as a triple roll, heated as necessary to melt and mix, and then cooled to form a wax-like mixture. It can be obtained by The ratio of these components (a) to (e) varies depending on the type of support and the coating machine used, but is approximately (a): (b): (C): (d): I
C) is 1:10-50:10-50:1-10:10
~70.

The coloring composition of the present invention does not require complicated operations for microencapsulation as seen in pressure-sensitive recording paper, and in the present invention, the leuco dye is retained on the surface of the extender pigment. Since it is mixed with waxes and integrated, conventional microcapsule liquid f can be used as a means of coating it on the support.
: Unlike the coating method, fMi can be applied extremely easily using equipment that produces simple back carbon paper. In particular, when paper is used as a support, the conventional microcapsule liquid coating method causes wrinkles in the paper, so high-speed calendering is performed after coating and drying to remove wrinkles. It is convenient and easy to apply, without worrying about such operations, because it dries quickly and does not require a drying process, and can be printed using the FT11JLI equipment for carbon paper as described above. Another advantage of the present invention is that unlike pressure-sensitive recording paper, it is not necessary to coat the entire surface of the support, and there is no need to perform spot recording using desensitizing ink in partial areas. The composition of the present invention can be easily applied locally.

Furthermore, the light fastness after color development was also superior when the composition of the present invention was used. (Compared to back carbon paper, the present invention does not cause any contamination of clothes and is superior in terms of environmental hygiene.Furthermore, when the composition of the present invention is used as a heat-sensitive recording sheet, It is possible to make copies by stacking multiple sheets, and this point is also superior to currently commercially available heat-sensitive recording sheets.

In addition, as acidic substances for coloring the coloring composition of the present invention, inorganic substances such as acid clay, activated clay, bentonite, colloidal silica, aluminum silicate, etc., or organic substances such as oxalic acid, maleic acid, phenol-formalin resin, etc. Although there are materials, these are commercially available as color developer paper for pressure-sensitive copying, and these commercially available products can be suitably used.

Next, the present invention will be explained in more detail with reference to Examples.
Parts represent parts by weight.

Example I Solution A (dye-containing solid) B'#, (wax mixture) Solution N was rolled, heated for 7 hours, and heated at 130'C for 11 hours.
Add the liquid and keep it moist for about 2 hours, stirring well for about 2 hours,! I was confused. The composition thus obtained is -h:g
It was coated on paper and dried to obtain a recording sheet. This self-recording sheet can be made from commercially available clay paper, resin, i4 (or
By writing on top of a sheet of color developing paper coated with a metal salt of notylic acid, blue printing power was immediately obtained. These colored prints had excellent +lj19 properties on each color developing paper, and even after being stored for 3 months, the prints were clear and had sufficient value in terms of storage stability.

Example 2 Decomposition (dye-containing solid material) Crystalline iolet lactone 3 parts Pensoyl leucomethylene blue 2 parts Calcium carbonate 150 parts Alkylnaphthalene (product of KMO Kureha Chemical Co., Ltd.) 150 parts Lanolin 50 parts N-alkyl trimethylene Diamine (Deomin Lion Akzo product) 30 parts Bi (wax mixture) Carnauba wax 50 parts Montan wax], 00 parts Stearic acid 20 parts 13 Added Part A KBfi and kneaded for 3 hours at room temperature using a triple roll. It was well dispersed and mixed. The thus obtained colored composition was coated on high-quality paper and dried to obtain a recording sheet.

By stacking this recording sheet with commercially available color developing paper coated with commercially available white clay and writing on it, a vcy (color print) was immediately obtained.
13)): Even after being stored for months, the print was clear and had sufficient practical value in terms of storage stability.

Example 3 2-anilino- in place of crystal violet lactone and benzoylleucomethylene blue in Example 2
Using 5 parts of 3-methyl-6-dinithylaminofluorane, it was dispersed and mixed in the same manner as in Example 2, and then layered with developer paper. Obtained.

This colored print had excellent light resistance, and even after being stored for 3 months, the print was clear and had sufficient practical value in terms of storage stability.

Practical Example 4 20 parts of 2-(2-chloroanilino)-6-n-dibutylamino-fluoran was used in place of the crystal violet lactone and benzoylleucomethylene blue of Example 1, and the same process as in Example 1 was carried out to produce color developing paper. When printed, a black image appeared. This colored print has excellent luminosity, and even after being stored for 1.3 months, this print is clear, and from the perspective of storage stability, it is practical.
1Ti There was enough blood.

Applicant: Hodogaya Chemical Industry Co., Ltd. Agent 1) Hiroshi Naka

Claims (1)

[Scope of Claims] A coloring composition for a recording sheet, comprising: (a) a colorless or light-colored leuco dye 1], a solvent C0 extender pigment (d), a higher aliphatic alkylene diamine, and (e) a wax.