JPS63251485A - Production of printing ink by direct method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing printing ink. For more details, please see
Direct method J: Concerning the manufacturing method of printing ink.

[Prior Art] The conventional method for manufacturing printing ink consists of the following series of steps: (a) A starting material 1 of face powder is reacted in a stirring vessel to form a mixture of about 1 to 3% by weight. IG to take a slurry in which pigment is contained in the mother liquor? -L/, (b) The liquid phase reaction product is filtered and washed with water to remove the mother liquor and reduce water-soluble by-products to an acceptable level to remove about 20% by weight pigment and about 80% water by weight. (c) placing the press cake in a high horsepower/high shear mixer for at least 15 hours to transfer the pigment from the aqueous phase to the non-aqueous phase to fully disperse the pigment in the non-aqueous phase; , then adjust the batch by adding each weighing ink component so that the properties and color characteristics are 1q.

The pigment produced in step (d) is delivered to a local printing ink manufacturer, where it is mixed with (e) an additional varnish consisting of a resin, a solvent, an optional drying oil and additives, and then delivered to the customer. We manufacture printing inks that match requests.

Alternatively, the 1 m 14 press cake from step (b) is dried, the dried pigment is mixed with non-aqueous ingredients to form a paste, and the base 1 is loaded under high shear in a J:Una dispersion apparatus of a three-roll mill. There is a method to process it.

[Problems to be Solved by the Invention] It is an object of the present invention to provide a manufacturing process for producing printing ink of improved quality in less time and at lower cost.

[Means for Solving the Problems] The 67th object of the present invention is achieved by a direct method comprising the following steps. That is, in the direct method of the present invention, (a) a starting material 1 for preparing 1 q of organic pigment is reacted in a stirring vessel to obtain a product containing 6 to 15% pigment in the mother liquor; ) Passing the product through a high horsepower/high shear mixer to convert face 1'81 from the aqueous phase to the non-aqueous phase, and then (c) while the +A component is still in the mixer, to make the printing ink base. It consists of the process of adding various necessary ingredients.

[Action 1 In step (a), raw material for pigment production is charged into a strike tank equipped with a variable speed stirrer, steam heating means, and thermometer J3 A: pl-1 meter. The contents are stirred for 2 to 6 hours until the reaction required to produce the pigment is complete.

In step (b), the reaction product from step (a) containing 6-15% pigment is passed through a high horsepower/high shear mixer such as a Baker Perkins-type fludge mixer. Send to. A suitable printing ink varnish is added to transfer the pigment from the aqueous phase to the non-aqueous phase. The varnish preferentially wets the pigment and exchanges it for water, separating clear water free of pigment. When the water separates, a soft paste containing pigment, varnish and a small amount of water is obtained. The viscosity of this soft paste gradually increases with further addition of pigment slurry and small amounts of varnish as required for pigment wetting and water separation purposes. The final product is extremely heavy and stiff and requires an efficient mixer with high horsepower/high shear to create a good dispersion of pigment in the varnish.

Wash this solid mass with water to remove the soluble salts entrained in the facial slurry. Repeat the operation by adding fresh water, mixing and rinsing several times until a low conductivity is achieved. The final mass contains pigment, varnish and 10-20% by weight of water, which can be removed by heating under reduced pressure or stirring under atmospheric pressure for natural evaporation. .

Finally, this mass is further coated with varnish, solvent, dry V-
etc. are added and processed into a press ink base.

Typical resins added to the varnish include hydrocarbon resins, alkyds, phenolic resins, modified noenol resins,
Included are, but are not necessarily limited to, rosin esters and modified rosin esters and mixtures thereof. ＼The amount used is 45-70% by weight based on the oil base.
, preferably 25 to 50% hand hanging.

Drying oil is added initially for the purpose of water removal and later for the purpose of improving press properties. Typical oils include alkyds, linseed oil, soybean oil, drying varnishes, and mixtures thereof, with amounts used ranging from 5 to 25% on a total varnish basis.
% by weight, preferably 5-10% by weight.

In the method of the present invention, special materials are selected and used according to the needs of each customer. Therefore, the amount of additive used varies depending on the desired physical properties of the final ink, but is generally about 3% or less, preferably about 1% based on the weight of the final ink.
%.

The direct method of the invention can be applied to any pigment for printing inks. These include Mono and Sialite Yellow (Nono- and formerly Aryl ide Yellow).
, Rithol Rubine
, Permanent Red 2 B
t Red2B), Lithol Red (Lithol
Reds), Red Lake C
C) OJ, Biphthalocyanine Blue (Phthalo
cyanunc Blue) is wrapped.

The method of the invention can be carried out, for example by offsetting or lithographic printing.
It is applicable to the production of any water-insoluble inkjet vehicle in publishing gravure, certain packaging gravure and flexographic printing systems.

Flasher of liquid phase reaction products from strike tank
The total time required from loading the ink to transferring the final printing ink for packaging is approximately 6-12 hours.

The method of the present invention can be carried out in a continuous, semi-continuous or batch manner.

[Examples] Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to these Examples unless it departs from the gist of the present invention. Also, throughout this specification, all temperatures are in degrees Celsius, and parts and percentages are by weight unless otherwise specified.

Example 1 A Pigment Yellow 12 slurry was prepared as follows: A. Adding 680 parts of hydrochloric acid (35.5% or 20BO) to 2400 parts of ice in a makeup tank;
Then 350 parts of dichlorobenzidine 100% (as dihydrochlorite) were added. 30% of this slurry
Stir for 1 minute, then add 1700 parts of ice to O~-5
Cooled to ℃. To this was added 10 parts of a chelating agent. This slurry was stirred for 10 minutes at 0 to -5°C. To this cooled slurry was added 532 parts of 385% monohelium nitrite solution over 2-4 minutes. The contents were stirred for 30 minutes to form the tetrazo of dichlorobenzidine; the mono-lium nitrite was maintained in excess during this time. Pour the resulting tetrazo into a strike tank containing 1000 parts of ice.

To 1,600 parts of ice, 500 parts of a 50% mono-lium hydroxide solution was added, followed by 580 parts of a 70% acetic acid solution. The mixture was stirred for 15 minutes and 525 parts of acetoacetanilide (acute-aCetani l 1d
e) was added. The resulting slurry was stirred for 30 minutes and then 30 parts of surfactant was added.

1050 parts of ice was added to the acetoacetanilide slurry and cooled to 8-10'C. The pH of the slurry is 6.
1 to 6.7 (8 to 10°C).

Excess 1-lium nitrite in the tetrazo was annihilated by addition of 16 parts of sulfamic acid.

The acetoacetanilide slurry was added to the tetrazo within 20 minutes in a strike tank.

The resulting tan dispersion in the strike tank was stirred for 30 minutes to complete the reaction. During this time, the temperature was kept at 8-12°C. The DH of the slurry after the completion of the reaction was 2.6-3°3. Next, this yellow-brown slurry was heated with steam for 45 minutes.
°C and 50% aqueous solution of hydroxide]~4.50
of the slurry was added to adjust the DH of the slurry to 10.1 to 10.3. During heating, the slurry became very clear and the color turned yellowish brown.

-8= 73 parts of sodium salt of rosin dissolved in 250 parts of water were added to the above slurry at 50<0>C. This slurry
After stirring for a minute, 37 parts of inorganic salt were added. This slurry was stirred at 45-50°C for 10 minutes or more. The final 1)H of the slurry was 6-6.5 at 45-50°C.

This slurry containing 8-10% yellow organic pigment was applied to a high horsepower/high shear mixer.

3.8 Ye with 8.7% pigment (33 parts) and 66 parts quick-drying vehicle (viscosity 26-27 poise) in an 8aker-Perkins high horsepower/high shear flasher.
12 parts] to 383 parts of like tank slurry were added. The mixture was heated to 50-60°C and stirring continued until the water separated and the oil-pigment phase could be collected together (approximately 30-60 minutes). Clear water separated and the oil phase was very soft.

Then 191 parts of Yellow 12 slurry (17
(about 30 minutes) and continue stirring until the water separates and the oil-fiber phase is collected together. This mass was extremely heavy.

Then 191 parts of the Ywllow 12 slurry (1
7 parts of pigment) was added and stirring continued until the water separated and the oil-pigment phase was collected together (approximately 15-20 minutes).

This mass was extremely hard. 83% of the water was separated.

Wash by adding 1500 parts of fresh tap water, stir for 5 minutes, and then separate the water. This was repeated a total of 4 times.

Conductivity before cleaning is 7.554X 10,000 mho
s and after cleaning 6.94x 1,000 mh
It was os.

After the final wash the mass consisted of 50% pigment, 50% varnish, d3 and residual water.

The mass was mixed with 79 parts of quick-drying varnish, 2 parts of anti-skinning agent, and 3 parts of Hexylcar (softener) to give 216 parts of ink base.

216 parts of this ink base, 400 parts of gelling quick-drying varnish, 66 parts of blended wax, and 42 parts of stone? III distillate (average boiling point 280°C), and mixed with 59 parts of water to produce 8
．． 833 parts of press printing ink containing 0% by weight of pigment were obtained.

Example 2 Example 1 was repeated using each of the following in place of Piament Yellow 12: RithOI
Rubine.

Permanent Red 2B, Red Lak
e C, and phtha+ocyar+rne Bl
ue, the results were the same as in Example 1.

[Effects of the Invention] By using the direct method of the present invention, printing inks with significantly improved physical properties are obtained. Moreover, savings in time, energy and money can be achieved. Increasing the solids content in the slurry reduces runoff, resulting in easier transfer of pigment to the non-aqueous phase in the flasher and reduced suspension of waste material, both solid and liquid.

Producing the printing ink directly in the flasher eliminates intermediate filtration and standardization steps, saving time, energy and money. Extra batch runs can be made in a given time; color intensity is enhanced due to less pigment processing; fewer raw materials are required than conventional methods to produce the same intensity.

The final product, off-hit or lithographic ink, has color strength,
It is superior to inks produced by conventional methods in terms of gloss, transparency, sharpness of color tone, and dispersibility, and also has good quality stability.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a conventional method for manufacturing printing ink, and FIG. 2 is a schematic diagram showing a method for manufacturing printing ink according to the present invention. 1... Pigment reaction tank, 2... Filter press, 3... Press cake, 4... High horsepower/high shear force mixer, 5... Ink base, 6... Mixing tank, 7... ...Filter, 8...Three-stage roll mill, 9...
- Ink product, 10... non-aqueous additive, 11... standardization tank. Written amendment of procedure for one person (released) 1. Display of the case 1986 Patent Application No. 85600 2, Name of the invention Direct method J, Manufacturing method of printing ink 3, Person making the amendment Relationship to the case Applicant name (name) Lin Chemical” - Poreshi Bl N4
6. Agent address: 1-1-5 Minami Aoyama-chome, Minato-ku, Tokyo, Voluntary request for amendment order) (Shipping 8) Month, Day 6, Showa, Subject of amendment

Claims (4)

[Claims] (1) A method for producing a printing ink base by a direct method,
The following steps: (a) reacting the starting materials for obtaining organic pigments in a stirred vessel to obtain a product containing 6-15% by weight of pigment in the mother liquor; (b) converting the product into a / A process comprising the steps of converting the pigment from an aqueous phase to a non-aqueous phase in a high shear mixer, and then (c) adding various ink ingredients to form a printing ink base while the material is still in the mixer. (2) The manufacturing method according to claim 1, wherein the printing ink base is processed into printing ink. (3) The method according to claim 1, wherein the pigment is an azo pigment. (4) The manufacturing method according to claim 1, wherein the pigment is phthalocyanine.