JPH0128785B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a W/O emulsion type colorant composition intended to provide a printing ink. However, it can also be used as an ink that penetrates and fixes into the paper surface, such as ink for plate printing or newspaper printing ink.

Conventional coloring material compositions of this kind are suitable for major printing formats such as letterpress printing such as woodblock printing and paper printing, intaglio printing such as etching and dry point printing, and the coloring material composition adhering to the printing plate or roller can be easily wiped off. Because it does not dry easily even when left as it is, it can be easily wiped off and cleanup is easy, so it is often used as a teaching material in school education.

However, this colorant composition has storage stability problems, and during long-term storage, the emulsion often breaks down and separates into non-volatile oil and water, making it unusable, or the viscosity decreases, making it difficult to use in the ink. There are disadvantages such as lowering the suitability for In particular, it is often found in colorant compositions that use inorganic pigments.

This invention discloses that the conventional W/O emulsion type colorant composition contains N-acylamino acid amide and N-
- By dissolving an amino acid derivative selected from acylamino acid esters and N-acylamino acid amine salts, it is possible to prevent the destruction of emulsions and improve the storage stability of colorant compositions, especially for colorant compositions using inorganic pigments. However, it solves all the above-mentioned drawbacks.

Among the ingredients used in this invention, non-volatile or non-volatile liquids include mineral oils such as liquid paraffin, spindle oil, light oil and kerosene; animal and vegetable oils such as olive oil, rapeseed oil, castor oil and soybean oil;
Examples include esters such as DOP, TCP, and higher fatty acid esters, but preferably liquid paraffin and
Examples include hardly volatile mineral oils, such as spindle oil, and non-drying vegetable oils, such as olive oil and rapeseed oil.

The pigments used in this invention include all pigments used in inks and paints, including inorganic pigments such as titanium oxide, Bengara, ocher, ultramarine, and navy blue;
Examples include organic pigments such as Hansa Yellow, Cyanine Blue, and Carbon Black, and extender pigments may be added if necessary.

The emulsifier used in this invention can be one used in conventional emulsion-type colorant compositions, but in order to improve the emulsification of oils containing amino acid derivatives, fatty acid esters of sorbitan or fatty acid esters of polyoxyethylene can be used. etc.
Examples include nonionic activators of HLB 3 to 9, fatty acid monoglycerides, fatty acid alkali salts, and the like, and the above-mentioned nonionic activators are preferably used.

The amino acid derivatives used in this invention include N-acylamino acid amides, N-acylamino acid esters, and N-acylamino acid amine salts. Among these three amino acid derivatives, N-acylamino acid esters and N
-Acylamino acid amides can be produced, for example, by heat-reacting N-acylamino acids with alcohols or amines in the presence of an acid catalyst or without a catalyst, respectively, or by acylating amino acid esters or amino acid amides with an acylating agent such as a fatty acid halide. You can also get
In addition, N-acylamino acid amine salts can be easily obtained by neutralizing N-acylamino acids with amines, but N-acylamino acids or metal salts thereof and amines or acid addition salts thereof are mixed in powder or solution. It is also possible to directly solidify the organic medium by adding it to the organic medium to be solidified in the form of N-acylamino acid amine salt to generate the N-acylamino acid amine salt.

Various amino acids are used, such as α, β, and ω-amino acids, but especially glycine, β-alanine, α-alanine, valine, serine, methionine, phenylalanine, and 3,4-dioxyphenyl. Preferred examples include alanine, aspartic acid, glutamic acid, lysine, ornithine, arginine, histidine, and ε-aminocaproic acid. Of course, an amino acid mixture may be used, for example, a hydrolyzate of proteins from soybeans, fish meat, yeast, algae, or residual amino acids in amino acid production waste liquid can also be used.

The N-acyl group in the three types of N-acyl amino acid derivatives used in the present invention is a linear or branched saturated or unsaturated aliphatic acyl group or aromatic acyl group having 1 to 30 carbon atoms. Particularly preferred are caproyl, capryloyl, lauroyl, myristoyl, and stearoyl groups, and mixtures thereof may also be used.

The alcohol used for esterification has 1 or more carbon atoms.
30 linear and branched saturated and unsaturated aliphatic alcohols are used, especially octyl alcohol, lauryl alcohol, cetyl alcohol, isostearyl alcohol, stearyl alcohol and the like. Furthermore, alicyclic alcohols such as cyclohexanol and aromatic alcohols such as benzyl alcohol can be used similarly.

In addition, the amines used for amidation and amine salts include ammonia, straight chain and branched saturated amines having 1 to 60 carbon atoms,
Unsaturated primary and secondary amines, mono- and di-alcohol amines (e.g. mono- and diethanolamine) and amine salts such as tertiary amines and trial-alcohol amines (e.g. triethanolamine) are also used, but in particular butylamine, octylamine, Preferred examples include laurylamine, isostearylamine, and stearylamine. In addition to aliphatic amines, alicyclic amines such as cyclohexylamine and aromatic amines such as benzylamine may be used.

Particularly suitable gel performance is determined by the balance between the N-acyl group and the other constituent in the ester group, amide group or amine salt; It is desirable that one or both of them be long-chain aliphatic having 8 or more carbon atoms.

Other additives that can be used include pigment improvers such as alkyl alkoxy titanates, antifreeze agents such as ethylene glycol/glycerin, preservatives such as halogenated acetamides, fragrances, and the like.

The ratio of these components is 10 to 50% by weight of oil (hereinafter referred to as % by weight), based on the total amount of the colorant composition;
It is preferably 15 to 20%; if it is too large, drying and fixing of the coated surface will be poor, and if it is too small, storage stability will be poor or the emulsification pattern will be reversed.
The moisture content is 30-65%, preferably 50-60%,
If it is too large, the storage stability will be poor or the emulsification pattern will be reversed, and if it is too small, the drying of the coated surface and the cleanability of the equipment used will be poor. The pigment may be used in an amount that provides a desired coloring temperature, preferably 3 to 30%, preferably 5 to 20%. The emulsifier may be used in an amount that allows a stable emulsion to be obtained, and is preferably 1 to 10%, preferably 3 to 7%.

Amino acid derivatives are 1-3% based on 100% oil,
The content is preferably 1.5 to 2.5%; if it is too large, gel hardening of the oil component will increase and the composition will lose its proper viscosity, while if it is too small, storage stability will be insufficient.

To prepare the colorant composition of the present invention from the above-mentioned components, a pigment is added to a portion of the oil and kneaded at room temperature using a conventional kneading means such as a ball mill or three-roll mill to obtain a liquid A. At this time, adding a pigment modifier as necessary is effective in improving dispersibility and stability. Next, a gelling agent is added to the remainder of the oil and heated and stirred at 140 to 150°C to completely dissolve. Further, an emulsifier and Solution A are added and mixed with stirring to obtain Solution B.

On the other hand, dissolve an antifreeze agent, preservative, etc. in water as necessary to obtain liquid C.

B solution to 95-120℃, preferably 100-110℃,
Keep liquid C at 95 to 100℃, preferably 95 to 97℃, and add liquid C to liquid B using a turbine blade type emulsifier.
10 to 30 minutes plus 20 to 60 minutes after complete addition;
Preferably, the mixture is stirred for 30 to 40 minutes and then cooled.

Next, examples will be shown to further clarify the invention. In the examples, parts mean parts by weight.

Example 1 Liquid paraffin 3.4 parts "Plenact KR-TTS" (pigment modifier) [trade name, Ajinomoto Co., Inc., isopropyl triisostearoyl titanate] 0.3 parts titanium oxide FA・50 (manufactured by Furukawa Mining Co., Ltd.) 11.4 parts mixed The mixture was thoroughly kneaded using a three-roll mill to obtain liquid A. Then liquid paraffin 12.3 parts N-lauroylglutamic acid dibutylamide
Mix 0.4 parts and stir at 150℃ for 10 minutes to completely dissolve, then add 6.5 parts of "Nonion OP-80R" (emulsifier) [trade name, Sorbitan Monooleate manufactured by NOF Corporation] and Solution A and mix uniformly. Stir until the mixture is mixed and use it as Solution B.

Ethylene glycol 9.0 parts "Deltop" (preservative) [Product name, Takeda Pharmaceutical Co., Ltd.
Halogenated Acetamide Co., Ltd.] Dissolve 0.3 parts in 56.4 parts of water with stirring to obtain Solution C.

Raise the temperature of liquid B to 110℃ and liquid C to 97℃, and gradually drop liquid C into liquid B using a turbine blade mixer (two-shaft mixer made by Inoue Seisakusho) (for 20 minutes). After complete addition, add liquid C for another 30 minutes. After continuing stirring, the mixture is allowed to cool to obtain a white coloring material composition.

Even when this colorant composition was stored at 50°C for 2 months, no separation of the emulsion was observed, and the viscosity showed little change, making it suitable for various printing plates.

Comparative Example A coloring material composition was obtained in the same manner as in Example 1 except that 0.4 part of N-lauroylglutamic acid dibutylamide was replaced with liquid paraffin. This composition is 50℃
When stored for one month, severe separation of oil was observed.

Example 2 (Liquid A) Liquid paraffin 8.5 parts "Permanent Red FGR" [trade name, manufactured by Hoechst, CI Pigment Red 112] 6.3 parts (Liquid B-Liquid A) Liquid paraffin 10.5 parts N〓-N〓-Zica Proyl lysine lauryl ester
A colorant composition of Red 3 was obtained according to Example 1 using 0.4 parts of "Nonion OP-80R", 6.7 parts (liquid C), 9.3 parts of ethylene glycol, 0.3 parts of "Deltop", and 58.0 parts of water.

Example 3 (Liquid A) Spindle oil 3.6 parts "Plenact KR-TTS" 0.3 parts Bengara 503 (manufactured by Mie Pigment) 10.4 parts (Liquid B-A) Spindle oil 13.0 parts N〓, N〓-dicaproyl lysine Stearylamine salt 0.3 parts "Nonion OP・83RAT" (emulsifier) [Product name, manufactured by NOF Corporation Sorbitan Sesquioleate] 4.3 parts "Nonion OT・221" (Emulsifier) [Product name, manufactured by NOF Corporation Polyoxyethylene sorbitan monooleate] 0.2 parts (Liquid C) Propylene glycol 7.5 parts "Fainchem PL-100" (preservative) [Product name, manufactured by Tokyo Fine Chemical Co., Ltd., organic tin compound] 0.3 parts Water 60.1 parts According to Example 1, a coloring material composition of Small 3 was obtained.

This invention has a great effect of improving the stability of the coloring material composition, and any coloring material can be supplied in a stable state.

In addition, in the case of letterpress-style prints such as woodblocks and paper plates, the coloring agent has good stretchability, so it adheres uniformly to the rubber roller, which is the transmission material for the coloring agent, so the coloring agent is applied uniformly to the plate, and the coloring agent is applied evenly to the plate. The result is a uniform print. In addition, it has good permeability to the paper surface and can be quickly permeated and fixed. In the case of intaglio prints, the coloring material penetrates into the grooves well, but also adheres well to the paper surface, resulting in a print with rich line art.

Claims (1)

[Claims] 1 Mineral oil, which is a slightly volatile or non-volatile liquid,
In a W/O emulsion type colorant composition in which water is emulsified in a colorant material in which pigments are dispersed in one or more oils selected from animal and vegetable oils and esters, One or more amino acid derivatives selected from N-acylamino acid amides, N-acylamino acid esters, and N-acylamic acid amine salts are added to the above oil.
An emulsion type colorant composition characterized in that it is dissolved in an amount of 1 to 3% by weight based on 100% by weight.