Printing ink uv curing

 

(57) Abstract:

Usage: mainly for printing by screen method on paper, cardboard,plastic and metal films and products, glass and other materials. The inventive printing ink UV curing contains (mass. (wt.%) 1-15 pigment, 35-55 oligoadenylate, for example, industrial brands TGM-3, MGF-9, MDF-2 and/or triacrylate pentaerythritol, 20-35 acelerando epoxygenase resin with a molecular mass of 550-600, 3-6 photoinitiator, 0.01 to 0.1 coinitiator (benzoyl peroxide and/or dinitrile azabicycloalkanes acid), and 1-2,5 thixotropic agent (Aerosil), 0.5 to 1.0 defoamer (polydimethylsiloxane liquid and inert inorganic drive the rest. 1 C.p. f-crystals, 2 tab.

The invention relates to printing inks, in particular printing inks for the application of the desired picture or text method setdataframe printing and subsequent fixing of the seal by photopolymerization binding upon irradiation with UV light. We offer paint allows you to get one - and multi-color text, graphics and barcode images on flat surfaces of various materials: paper and cardboard, glass, metal and polymer films to show, including pigment, oligopyrroles, trichlorodiphenyl and epoxy Dianova resin molecular weight 400-500, modified by diphenylethanol role of photoinitiator liquid binder, in the following ratio, wt. Pigment 12-35 Oligopyrroles the 45-70 Trichlorodiphenyl 5-15

Epoxygenase resin,

modified by diphenylethanol 5-20

However, the paint on its rheological properties, primarily due to the high viscosity and low thixotropy, it is not possible to get quality prints method setdataframe print. Additionally, high speed curing of this paint-prototype (about 2-5 with power density of irradiation of 30 W/cm) is achieved only in the case of paint layers with a thickness of 1-1 .5 μm, typical for offset printing. In the case of screen printing, where the thickness of the paint layer is 20-50 μm, the curing time of such dye increases sharply.

The aim of the present invention is to provide a printing ink with rheological properties that meet the requirements of the screen printing technique with a high speed UV curing sufficiently thick layer of paint.

Printing ink UV utverjdaemogo, according to the invention, as a modified epoxy resin it contains acelerando epoxygenase resin molecular weight 550-600 the product of the interaction of equivalent amounts of (meth)acrylic kislota and epoxygenase resin of molecular weight 400 to 500, and further comprises photoinitiator, sonicator benzoyl peroxide and/or dinitrile azabicycloalkanes acid thixotropic agent Aerosil, antifoam polydimethylsiloxane acid and an inert inorganic filler, in the following ratio, wt. Pigment 1-15 Oligopyrroles 35-55

Arilirovaniya Epoque-

salyanova resin mole molecular weight 550-600 20-35 Photoinitiator 3-6

Coinitiator type

benzoyl peroxide

and/or dinitrile azo - visitmalta acid of 0.01-0.1

Thixotropic agent Aerosil 1-2,5

Antifoam polytime - tersilochinae fluid 0,5-1,0

Inert inorganic filler Rest

Printing ink KF-curing as oligoadenylate contains triethylene glycol dimethacrylate (TGM-3), dimethacrylate of triethylenemelamine (IFG-9), triacrylate pentaerythritol, dimethacrylate of diethylenglycol (MDF-2), or a mixture thereof.

As pigments and the high absorption by the pigment UV radiation, its concentration in the paint should be minimal, and the high intensity of color and covering power are achieved due to the greater thickness of the paint layer. The content of the pigment in the claimed composition of the paint is 1-15 wt. and for most of the pigments most preferably the content of 1-3, and for whites 10-12 wt. The amount of pigment than 15 wt. it is undesirable because of the sharp decrease in the speed of drying, and less than 1 wt. due to the lower intensity of the color paint.

As oligoadenylate used such industrial oligoadenylate as triethylene glycol dimethacrylate (industrial brand TGM-3), dimethacrylate of triethylenemelamine (IFG-9), triacrylate pentaerythritol, triacrylate of trimethylolpropane dimethacrylate of diethylenglycol (MDF-2), oligoribonucleotides (ACM-2) and other similar compounds. Most preferred are industrial oligoadenylate brands TGM-3 and MGF-9. The content of oligoadenylate in the paint is 35-60 wt. that is determined by the marginal values of the viscosity of the paint.

As acelerando epoxygenase resin, the so-called Dianova of epoxyacrylate, molecular weight 550-600 use the product of the interaction of widespread epoxidization acid (1 mol acid per 1 mol of epoxy groups). Get epoxyacrylate oligomer has a molecular mass of 550-600 and contains almost no free epoxy groups, but has a high level of C= C-bond, which gives the paint a high curing rate. Getting acelerando epoxygenase resin described in example 1 of the present description of the invention. The number acelerando epoxygenase resin in the paint is 20-35 wt. Smaller amounts significantly affect the photosensitivity of paint (curing rate), adhesion to non-absorbent substrates and stability of the impression to external influences. The concentration of resin is more than 35 wt. leads to an unacceptably high viscosity of the ink due to the high viscosity of acelerando epoxygenase resin and, consequently, poor printing technical properties of the paint. The most preferred content acelerando epoxygenase resin 25-30 wt.

As photoinitiator can be used known compounds for such photopolymerizable compositions, such as derivatives of anthraquinone, benzoin ethers, dimethylbenzylamine, etc. and mixtures thereof. The content of photoinitiator in paint too ordinary 3-6 wt. His lesser amounts do not provide high speed utverzhdeni the/P> As thermal coinitiator used such well-known and common compounds like benzoyl peroxide and/or dinitrile azabicycloalkanes acid. The content of coinitiator in the paint is 0.01-0.1 wt. The use of less than 0.01% of the quantities of terminator practically does not have an accelerating effect on the curing process, and the introduction of more than 0.1% is not desirable due to a noticeable decrease in the stability of the paint during storage.

Paint stencil printing must possess thixotropic properties, so their composition is thixotropic agent Aerosil. The contents of aerosol paint, providing the required level of thixotropy, 1-2,5 wt. To prevent spanelement ink when printing setcachefilename way, you need to enter a small amount (0.5 to 1.0 wt. antifoam polydimethylsiloxane liquid PMS-200, PMS-400, etc. Because the paint is usually low pigment content, to give it the necessary rheological properties impose additional inert inorganic filler of the type of micro-talc, chalk, kaolin, Benfica, etc., the Amount of filler depends on the viscosity of the liquid binder content and Maslama the second flask with stirrer and reflux condenser load 100 hours epoxy brands of ED-20 epoxy-20% which corresponds to the content of the epoxy groups of 0.47 mol. Then add to 0.47 mol (33,5 hours) acrylic acid include mixing, enter 0,33-0,66 hours (1-2 wt. in the calculation of the acrylic acid) of hydroquinone is added and stirred for 30 min at room temperature. After that enter 0.7 g of triethylamine (0.5. of the total load) and gradually increase the temperature to 90-110aboutWith further stirring at this temperature to reach an acid number of < 5 mg KOH/g Obtained viscous acelerando epoxygenase resin is cooled to 40-50aboutWith and merge. Getting epoxygenase accelerandi resin-based resin ED-22, etc. are quite similar, considering only suitable content of epoxy groups.

2. Preparation of printing inks UV curing.

To 25 hours received (as described above) acelerando epoxygenase resin add 50% of the estimated number of oligoadenylate IFG-9, i.e., 28 hours and stirred by heating the mixture up to 35-40aboutC. Then add photoinitiator mixture of 3.0 hours 2-tertbutylamine, 10 am, isobutyl benzoin ether and 1.0 hours of dimethylbenzylamine and stirred until complete dissolution of photoinitiators. Then to the resulting idiocyncracies liquid PMS-200A and 15,45 hours of micro-talc, thoroughly stirred for 15 min and fray the obtained suspension on a three-roll kraskoterke 2-3 times to achieve the degree of milling of no more than 12-15 microns. To the resulting paint add the remaining half of the estimated number of oligoadenylate IFG-9 (i.e., 26 hours), in which pre at a temperature of 35 5aboutWith dissolved 0,05 including benzoyl peroxide. The finished paint is stirred using a mechanical stirrer for at least 30 minutes the resulting paint has the following characteristics. Color: black, milling fineness of less than 15 μm, the strength of the rod viscometer PVK-1 (without cargo, 22about(C) 7-8, spreading 32-35 mm, the curing of the paint layer thickness of 30-50 μm under a UV lamp CES-400 at a distance of 6.5 cm from the source (tank capacity of 30 W/cm) 10-12, curing under the lamp 2000 W (tank capacity of 80-100 W/cm) 2-3, which allows you to work on the printing firm "Kamman" with a minimum speed of 12 m/min. Printed on the specified screen printing machine prints on the grid 120 l/cm (speed printing and UV drying 12 m/min) resistant to water, alkali and acids, as well as to alcohol (resistance 5 points table.2). The paint has a high resolution and printing technical properties, cachestoreprivate epoxygenase resin and preparation of paint carried out analogously to example 1. The quantitative content of the components in the ink are shown in table.1. Characteristics of the inks are shown in table.2. Inks according to examples 8 to 11 correspond to the beyond the contents of main components.

1. PRINTING INK UV CURING, mainly stencil containing the pigment, oligopyrroles and modified epoxygenase resin, characterized in that the modified epoxygenase resin it contains acelerando epoxygenase resin mol.m. 550 - 600 - product of the interaction of equivalent amounts of (meth)acrylic acid and epoxygenase resin mol.m. 400 to 500, and further comprises photoinitiator, coinitiator - benzoyl peroxide and/or dinitrosopentamethylene acid thixotropic agent Aerosil, antifoam - polydimethylsiloxane liquid and inert inorganic filler in the following ratio, wt.%:

Pigment - 1,00 - 15,00

Oligopyrroles - 35,00 - 55,00

Arilirovaniya epoxygenase resin (mol.m.550 - 600 - 20,00 - 35,00

Photoinitiator - 3,00 - 6,00

Coinitiator - benzoyl peroxide and/or dinitrosopentamethylene acid - 0,01 - 0,10

Thixotropic agent Aerosil - 1,00 - 2,50

Antifoam - polydimethylsiloxane the same time, that as oligoadenylate it contains dimethacrylate triethylene glycol TGM-3, dimethacrylate of triethylenemelamine IFG-9, triacrylate pentaerythritol, dimethacrylate of diethylenglycol MDF-2, or a mixture thereof.

 

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16 cl, 1 dwg, 4 tbl

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,

where values of radicals are given in the claim. The invention also relates to a polymerisable composition and a method for polymerisation in the presence of said catalytic compounds. The invention enables to initiate the reaction only if desired by external activation, such as heating or light.

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