JPS62225576A - Brightness improver for coating material and ink - Google Patents

Abstract

PURPOSE:The titled additive, consisting of a specific titanium chelate compound and capable of improving brightness, providing enhancement of gloss and hiding power and giving coating materials and printing inks having improved adhesive force. CONSTITUTION:An additive consisting of at least one titanium chelate compound expressed by the formula [R1 is H, 1-22C alklyl or 3-22C alkenyl; R2 is methyl or phenyl; R3 is R4, R5O or R6NH (R4-R6 are 1-22C alkyl, 3-22C alkenyl, 6-14C aryl, 7-15C aralkyl or 7-17C alkylaryl); m' is as follows; 2<=m'<4].

Description

[Detailed description of the invention]

-1 The present invention relates to an additive that improves sharpness in paints and inks.

In general, pigments have poor dispersibility and miscibility in organic media when used as raw materials, and when pigment materials are used as colorants in paints or printing inks, the original color of the pigment cannot often be obtained. , problems such as poor clarity, bronzing, and decreased gloss and hiding power may occur. In order to eliminate such defects, many pigments are subjected to surface treatments or are used in combination with dispersants, but no satisfactory method has yet been found. An object of the present invention is to provide an additive that significantly improves the visibility of pigments, and at the same time increases the lipophilicity of pigments and improves their dispersibility in various organic substances such as organic solvents, vehicles, and resins. It's about doing. . The above objectives of T.m. are achieved by using specific titanium chelate compounds. That is, the present invention relates to the general formula (I) [wherein R1 is a hydrogen atom or a carbon number of 1 to 22]
an alkyl group, an alkenyl group having 3 to 22 carbon atoms, R
2 is a methyl group or phenyl group, R3 is R, s, Rh
o or RbNH, and R4, R2, and R6 are the same or different alkyl groups having 1 to 22 carbon atoms, alkenyl groups having 3 to 22 carbon atoms, aryl groups having 6 to 14 carbon atoms, and alkyl groups having 7 to 15 carbon atoms. It is an alkyl group or an alkylaryl group having 7 to 17 carbon atoms. m' is 2≦m'<4. ] The present invention relates to a sharpness improver for paints and inks, which is characterized by comprising at least one titanium chelate compound shown in the following. In general formula (I), preferred examples of R4, R, and R6 include methyl, ethyl, butyl, lauryl, octyl, oleyl, benzyl, phenyl groups, etc.
Practically speaking, R1 is preferably a hydrogen atom, an isopropyl group, an n-butyl group, or an oleyl group, and m, which indicates its abundance relative to titanium atoms, is 2 or more and less than 4, preferably 3.5 or less. Specific examples of the compound represented by the general formula (I) are shown in Table 1. In order to obtain the titanium chelate compound of the general formula (I) of the present invention, a general method is to react titanium alkoxide with β-diketones. What is necessary is to add 0.5 to 4.0 moles of and heat under reflux. The amount of the titanium chelate compound used in the present invention is 0.1 to 30% by weight, preferably 0.5 to 20% by weight, based on the pigment. The surface modification of the pigment by the sharpness improver in the present invention is as follows:
The compound of general formula (I) and the pigment may be mixed by a dry method or a wet method, but the wet method is preferable from the viewpoint of uniform mixing. During wet processing, hydrocarbons such as naphtha, hexane, heptane, octane, octene, benzene, toluene, xylene or chlorinated hydrocarbons such as trichloroethylene are used which do not react with the sharpening agent of the present invention. The mixing temperature is not particularly limited, but is selected such that a reaction between the pigment and the sharpening agent occurs. In dry mixing, it is preferable to use, for example, a Henschel mixer, an Overt mixer, a Waring blender, or the like. Although the pigment may be surface-treated with the sharpness improver of the present invention in advance and then added to the paint or ink, the sharpness improver of the present invention and the pigment may be directly mixed into the paint, ink, or the like. Pigments surface-modified with the sharpening agent of the present invention can be applied to a wide range of organic media. Such organic media include, for example, drying oils such as linseed oil, tung oil, soybean oil, synthetic drying oils such as dehydrated castor oil, maleated oils, styrenated oils, vinyltoluenated oils, rosins, hydrogenated rosins, polymerized rosin, rosin ester,
Natural and processed resins such as maleic resins, shellac, zein, synthetic resins such as phenolic resins, xylene resins, modified alkyd resins, polyamide resins, coumaron-indene resins, urethane resins, rubber derivatives such as chlorinated rubber, cyclized rubber, Paints such as cellulose derivatives such as nitrocellulose and ethylcellulose, vehicles such as printing inks, solvents and diluents such as hexane, toluene, and cellosolve, polyethylene resins, polypropylene resins, polystyrene resins, polyvinyl chloride resins, polyester resins, unsaturated Examples include polymeric compounds for molding such as polyester resin, polycarbonate resin, silicone resin, acrylic resin, fluororesin, epoxy resin, ABS resin, and BS resin. Pigments whose surfaces can be modified by the sharpness improver of the present invention include calcium carbonate, mica, aluminum hydroxide, titanium oxide, antimony oxide, asbestos, silica,
Inorganic materials such as zinc yellow, red lead, red iron oxide, zinc white, talc, carbon black, barium sulfate, magnesium carbonate, phthalocyanine blue, quinacridone yellow, navy blue, brilliatocarmine 6B, lake red C, and fine metal powders and metal oxide powders. or organic pigments, but are not limited to these,
Pigments with hydrophilic surfaces are widely applied. In the present invention, a pigment having a hydrophilic surface is a pigment having a hydrophilic functional group such as a hydroxyl group or water of crystallization on the surface, or a pigment having adsorbed water on the surface. Although the detailed mechanism of the effects of the present invention is unknown, the titanium chelate compound of the present invention has a functional group that easily reacts with hydroxyl groups, acid groups, or adsorbed moisture on the pigment surface, while the chelate exhibits a stable lipophilic group. Because it has a group, it can be physically or chemically adsorbed to the surface of the pigment, and by coating the surface of the pigment, it can improve the miscibility of the pigment with the organic medium or resin, thereby improving visibility and dispersibility. It seems likely that it will be possible. The present invention will be explained in more detail with reference to Examples below. Note that the blending ratios in the examples are based on weight. Example 1 - In order to see the sharpness improvement effect of titanium chelate compounds shown in Table 1 in printing ink, carbon black (
Product name "Mitsubishi Carbon MA-s manufactured by Mitsubishi Kasei ■" and a titanium chelate compound were added to No. 4 varnish and kneaded with a Hoover muller (100 x 3 times) to obtain a colored oil.Then, this colored oil was spread on colored paper. The color was developed and observed with the naked eye (sensory test) and the reflectance was measured using a spectrophotometer.The composition of the colored oil and the test method are as follows.The results are shown in Table 2. Composition Contains clarity improver, No. 4 varnish 70 parts by weight, Pigment 25 Horn chelate compound 5 Horn blank, No. 4 varnish 75 parts by weight, Pigment 25# [Clarity] Color tone based on colored oil in the case of blank, Blackness, gloss, etc. were sensually evaluated with the naked eye. [Reduction rate of reflectance] The reflectance at a wavelength of 600 nm was measured, and the decrease rate of reflectance was calculated based on the blank colored oil. The larger the blackness, the higher the blackness. Example 2 Phthalocyanine blue (trade name [Cyani
A colored oil was prepared according to Example 1 using ne Blue LBG4 (manufactured by Sumitomo Chemical Co., Ltd.). The composition of the colored oil and the test method are as follows. The results are shown in Table 3. [Composition of colored oil] Contains visibility improver, No. 4 varnish 68 parts by weight, pigment 28 no! - Chelate compound 4 Horn blank - No. 4 varnish 72 parts by weight - Pigment 28 Horn [Sharpness] The color tone, gloss, bronze, etc. were visually and sensually evaluated based on the colored oil of the blank. [Reflectance Decrease Rate] The reflectance at a wavelength of 720 nm was measured, and the reflectance decrease rate was calculated based on the blank colored oil. The higher the number, the clearer the blue color without redness. Table 3 Example 3 Red azo lake (trade name rBright) as pigment
Red G Toner”; Toyo Ink 3’a@
A colored oil was prepared according to Example 1 using the following method. The composition of the colored oil and the test method are as follows. The results are shown in Table 4. [Composition of colored oil] Contains clarity improver / No. 4 varnish 52 parts by weight / Pigment 431 Tochelate compound 5 77 Blank / No. 4 varnish 57 parts by weight / Pigment 43 Horns [Definition] Based on the colored oil in the case of blank Color tone, gloss, bronze, transparency, etc. were visually and sensually evaluated. [Decrease rate of reflectance] The reflectance at a wavelength of 570 nm was measured, and the decrease rate of reflectance was calculated based on the blank colored oil. The larger the number, the greater the redness. Table 4: Light "Leg] U Increased gloss and hiding power can be obtained; (3) Improved adhesive strength; Examples include improved dispersibility.

Claims (1)

[Claims] 1. General formula (I) ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) [However, in the formula, R_1 is a hydrogen atom or a carbon number of 1 to 2
2 alkyl group, alkenyl group having 3 to 22 carbon atoms,
R_2 is a methyl group or phenyl group, R_3 is R_4,
R_5O or R_6NH, R_4, R_5, R_6
are the same or different alkyl groups having 1 to 22 carbon atoms, alkenyl groups having 3 to 22 carbon atoms, aryl groups having 6 to 14 carbon atoms, aralkyl groups having 7 to 15 carbon atoms, or alkyl groups having 7 to 17 carbon atoms; It is an aryl group, and m' satisfies 2≦m'<4. ] A sharpness improver for paints and inks, characterized by comprising at least one titanium chelate compound represented by