Anhydrous powdered concentrate for preparing an aqueous printing ink or varnish and method thereof

 

(57) Abstract:

Usage: in the printing industry for flexographic and gravure printing. The inventive anhydrous powdered concentrate for the preparation of aqueous printing inks and varnishes contains as a binder 10 - 850 wt. % resin with an acid number of 20 to 500 mg of potassium hydroxide per 1 g of resin. Resin vodorastvorimie in the initial state and soluble in water after neutralization of acid groups. As the neutralizing agent, the concentrate contains a base that can evaporate when heated in the drying conditions after printing. The content of base sufficient for the transfer binder resin in a water-insoluble state. Binder resin is a maleic or acrylic resin with an acid number of 40 to 250. Neutralizing agent is ammonium carbonate or a mixture of sodium hydroxide or potassium hydroxide or carbonate of alkali or alkaline earth metals. The concentrate is obtained by mixing in the dry state binder resin with a neutralizing agent. 2 C. and 10 C. p. F.-ly.

The invention relates to printing, including a pass-through layer printing on flexible substrates such as paper and thin cardboard, plastic sheets and the military use.

Printing ink for high and flexographic printing have been known for a long time. Such paints contain the following main components: at least one pigment or dye, i.e., coloring agent, at least one binding resin and a solvent system. The solvent system consists of organic liquids such as ketones, higher alcohols, esters, hydrocarbons, glosemosen hydrocarbons and so on, Such a solvent is necessary to translate the binding resin in the solution and "catch" pigment to form a liquid in which the resin is dissolved or at least most of it, and the pigment is finely dispersed. After printing, the solvent is evaporated to obtain a thin film of dry resin on the substrate, which includes a pigment. Paint solvent-based well-known and widely distributed in this area of technology.

Based paint solvents are widely used in the printing industry, especially for putting images and text on the packaging. Such printing inks have several advantages but also serious disadvantages: first, organic solvents rather expensive, and secondly, highly flammable. Recent laws on environmental protection, in particular the clean air Act, already do not allow the emissions of solvent vapors into the atmosphere. As a result, enterprises for the production of printing inks, as well as in shops for the sale, you must install the costly systems by removing the solvent.

Thus, in recent years efforts have been made to the production and development of aqueous printing inks, and are already working enterprise for the production and use of aqueous printing inks and varnishes. Water printing ink, of course, does not have the disadvantages of organic solvents and have the advantage that are better kept for pulp and printing substrates, such as paper and cardboard. They are not flammable.

The water-based paints in General contain in addition to water, at least one pigment or dye and at least one binding material. The water-based lacquers in the General case does not contain pigment. As a binding material in the aqueous ink contains a resin, such as rosin or shellac, or a synthetic polymer, selected in particular from acrylic acid, oxacillin acid and m is s completely or virtually insoluble in aqueous systems, but become soluble when adding a base (alkali) after or before incorporating them into the water. This solubility caused by the formation of soluble salts of the carboxylic groups of the acid-binding material. Linking the material again becomes insoluble when it again "translate" in the acidic condition, for example, by adding acid to its solution, i.e., by lowering the pH of the solution. The change between insoluble in water and soluble forms is achieved in aqueous inks by adding at least one volatile amine in the aqueous paint before making the print. Thus, the acid-binding material can form soluble amine salts. After printing when drying prints by heating, the above-mentioned amine salts "split" water-insoluble acid-binding material and a volatile amine. Volatile amine leaves printed texts or region, and the remaining acid binding material acts as a completely water solid binder for pigments and dyes. Volatile amines, which are currently used in the printing industry are, for example, ammonia or morpholine.

and gravure printing, is the relatively high percentage of such inks, generally 30 to 75 wt. and because these paints are to be transported from the producer to the consumer, it is necessary to transport large quantities of water, which is a disadvantage. In addition, most printers prefer to receive only the necessary amount of paint just before printing on a limited number of paper or cardboard.

It has long been known receiving printing ink in a dry powder form. Thus, the proposed powdery composition for formation together with an organic solvent printing inks for flexographic or gravure printing and method for producing such a powder composition. [1]

However, the aforesaid patent is directed solely on the composition of the printing inks for producing paints based on organic solvents. The disadvantage of such compositions is the necessity of transporting highly flammable or even explosive organic solvents.

Also known anhydrous concentrate for the preparation of aqueous printing inks or varnishes containing a binder based polyester containing imparting water-solubility of Sul is full of multivalent cations on, for example, calcium or aluminium.

The first and main object of the invention is to provide a dry powder that can be mixed with water to obtain the aqueous printing ink, in which the drying process becomes water-insoluble.

Another object of the invention is to provide a dry powder for preparation of the aqueous ink, the print quality, drying, film forming, and other useful properties which essentially do not differ from the corresponding properties of the original printing of water-based paints.

Another object of the invention is to provide a dry powder for the preparation of aqueous ink that contains no components, showing such steam pressure, which could result in long-term storage to changes in the composition of the powder.

Another objective is to provide a method of obtaining a dry powder for preparation of aqueous ink, which can be used as a pigmented printing ink or varnish.

These tasks, as well as some others, are achieved with the use of powder and techniques as already known [1] However, these powders can be used only solvent-based, i.e., in paints that do not contain water, and the known paint systems can not provide any model for water based paints because of entirely different chemical systems and mechanisms drying of such paints.

In accordance with the invention essentially proposes a neutralizing system different from the system liquid aqueous printing ink so that the neutralizing agent is in solid form.

In the present description, the term "solid type" determines not only the original solid materials, but also covers solid, which was adsorbing or adsorbing natural liquid component of the ink, i.e., the liquid component is transformed to the solid state. Although the active component of the ink is in liquid form, in accordance with the invention offers a solid form of this components. When this solid form in contact with the water in the next stage of education aqueous ink, the liquid component should probably be released from its rigid restraint environment and to dissolve in the aqueous phase.

It must be emphasized that the neutralizing agents that are currently used in inks and varnish currently used neutralizing agents are exclusively liquid or even gaseous, for example ammonia. The powder offered in accordance with the invention, does not contain any liquid component.

The term "neutralizing agent", as used in this description contains the basic materials that confer water-insoluble binding material in the acidic form, the property of solubility in water obtained in the final aqueous printing ink. At least the major portion of the neutralizing agent should be able to leave their salt link with acid binding material when heated, i.e., during the implementation stage of drying prints made using paint. Are preferred neutralizing agents, which have volatile properties and leave fingerprints when drying by heating. A partial list of the neutralizing agent contains the following compounds: inorganic ammonium compounds such as ammonium carbonate, acidic ammonium carbonate; organic amino and amido compounds, such as urea, ethanolamine, triethanolamine, morpholine, creatine, hexamethylen tetramin, melamine, 1,6-diaminohexane and other organic amines. If you want to use a liquid connection must first be set in solid form is polerowanie.

The above neutralizing agents are volatile, at least partially, and the effectiveness of the neutralizing agent can be increased by adding basic compounds, which are not appreciably volatile. Examples of such basic compounds are: basic inorganic oxide hydrates and salts, such as hydrate of sodium oxide, sodium carbonate, acid sodium carbonate; sodium oxide; the corresponding compounds of potassium and lithium; oxides, carbonates and, if they exist, acid carbonates of calcium, magnesium, barium, strontium, zinc and borax and other basic compounds such as sodium pyrophosphate. Of course, any selected neutralizing agent should be colorless and non-toxic.

In a dry powder which is the subject of the invention, the neutralizing agent is from about 1 to 15 wt. from the composition and distribution in the preferred embodiment is as follows, including NaOH 0 2; CON 0 - 1; LiOH 0 0,5; ammonium carbonate 3 10. As is known, the latter is responsible for the degradation during curing, decomposing into ammonia, carbon dioxide and water. However, unexpectedly, it was found that other components of the dry powder act as the ith agent, which must be used to obtain a dry powder, which is the subject of the invention depends on the number and total acid number acid binding material that is used, and can be easily calculated. It is also necessary to take into account the number and acid number acid binding material used in the preliminary dispersion of the pigment or pigments (see below). The amount of neutralizing agent should be such that the final pH of the final printing ink obtained from the dry powder was changed in the region of 7.5 to 9, in a preferred embodiment of 7.5 to 8.5, in the most preferred option was equal to about 8.

Resin acid binding material in accordance with the invention is, in General, a resin acid binding material, which forms a film on the substrate when performing printing. You can use any known or new resins that are soluble in the aqueous phase by neutralizing the basic neutralizing agent and which are essentially insoluble, when removed forms a salt material so that the resin is again transformed into an acidic state. Examples of such resins are alimera these PolicyKit with other acids of this group or other monomers, and a styrene-acrylate resin, epoxy resin, polyamide resin, polyester resin, rosin or resin maleinate, modified rosin shellac, polycarboxylic acids and resin or ester resins. Such resins should have an acid number (which is expressed, as usual, the value in mg KOH required to neutralize 1 g of this resin), changing in the area of 20 to 500, in the preferred embodiment 40 of 250, in the most preferred embodiment, from about 100 to 150. In this connection it should be noted that the term "binder" or "binder resin", as used herein, refers to not only separate the resin, but also any mixture of the above resins, and that the acid number indicated above refer to the total composition of all binder resins.

For special purposes and applications neutral binder resin may be added in an acidic binder resin. Such neutral resin must be soluble in the aqueous phase of the paint. Examples are methyl cellulose, Oxymetazoline and sodium carboxymethylcellulose, in the General case, in an amount up to about 5 wt. the powder. Such neutral resin improves the viscosity and the overall rheology of the ink, and southwarke state, upon acidification, they become less soluble as they are insoluble in acid-binding resin. In addition, good resistance to water prints, in General, is not necessary, as when using a printing ink, which is the subject of the invention, for printing packaging materials, they are laminated thin plastic films to ensure resistance to water and oil, as well as good looks.

The preferred choice of binder resin includes a resin, giving a well-pigmented, wettable powder. As will be described below, the pigment added to the dry paint first, mixed with soluble wettable by the resin.

An important modification of the idea of the invention is to combine the above acid binding resin with a neutralizing agent which is the subject of the invention, before the formation of a dry powder paint. For example, an acidic resin, is first suspended in finely dispersed form in water, add a neutralizing agent of the invention or, on the contrary, up until the acidic resin is dissolved, and the pH will be from about 7.5 to 9, in the preferred embodiment, approximately 8. Satelitami neutralizing agent of the invention. This solid material can be used in a dry powder which is the subject of the invention, in the form of a combination of an acidic resin and a neutralizing agent, and can also be used for pre-dispersion pigment.

The dry powder, which is the subject of the invention further contains at least one of pigments, known in this technical field. For this reason, there is no need to describe these pigments in detail. Of course, if the powder is designed to receive paint, any color pigments should not contain. Such a pigment is added to the dry powder in the form of a dispersion prepared in advance in acid binding resin and serves as a so-called "chips".

The dry powder, which is the subject of the invention may also contain auxiliary agents and modifiers, for example, excipients, smoothing agents, or agents, against abrasion, which improve the properties of the prints, such as PTFE or polyethylene waxes, polianinova paraffin or other waxes, and plasticizers for the binder resin, antifoaming agents, thickening agents, poverhnosti-active agents, amalgam is in liquid form, his first transfer in solid form, as described above, for example adsorb on finely ground inert solid particles, such as silica or white carbon black, alumina, etc. If you use the filler, which has adsorption capacity, such liquid auxiliary agents can also be adsorbed on part or all of the filler.

Fillers that can be used in a dry powder which is the subject of the invention, in General the same as those used in liquid paints. Examples are: calcium carbonate, chalk, barium sulfate, titanium dioxide, kaolin, etc.

The dry powder, which is the subject of the invention, in the preferred embodiment, receive through special procedures [1] which is a simultaneous dry grinding and aglomerirovanie component contained in the final dry powder. As for the method and its specific embodiments, it contains the following stages:

a) mixing the coarse particles of at least one pigment, pre-dispersed in an acid-binding resin, the coarse particles of the same or at least one other acid with the other solid support materials for flexographic printing inks for gravure printing, to form a homogeneous mixture of solid particles;

b) grinding the aforementioned mixture without adding a liquid component in an inert gas atmosphere under conditions precluding the melting of the mixture components;

c) removing the thus obtained composition in the form of a free current of powder.

In a preferred embodiment of the invention using nitrogen or carbon dioxide in order to establish and maintain an inert gas atmosphere during stage b, and, in addition, in the preferred embodiment, the material being ground, cool, cool and also a means for grinding. The latter is generally a friction mill, such as razbivka disc mill type Alpin, has one entry for materials subject to breakage, camera for grinding, having a cooling jacket, and an outlet for the ground material. Serves gaseous nitrogen or carbon dioxide together with a mixture, is subject to grinding at the entrance of the friction of the mill so that the camera for grinding throughout time does not contain oxygen. As a preferred inert gas is nitrogen. Particles having a size below about 100 MK, azizia has the appearance and physical behavior of salt or sugar.

The dry powder, which is the subject of the invention has in General the following structure (it should be borne in mind that the lacquers do not contain pigments), wt.

Pigment 0 80

Binding resin (resin) 10 80

The neutralizing agent is 0.1 to 20

Supplements 1 20

Fillers 1 20

The invention is further illustrated by means of specific examples, which should not be construed as limiting thereof.

Example 1. Yellow aqueous ink.

Prepare the following composition using the component below, by mixing them in an appropriate vessel in a specified sequence, wt. h

1. Pigment flakes comprising 20 to 90 of acrylic resin and 10 to 80 of the yellow pigment, preferably for water paints 67

2. Maleic binder resin 15

3. Acrylic binder resin 5

4. Neutralizing agent:

NaOH 0,5

(NH4)2CO36,5 7

5. Paraffin RT E (auxiliary means for printing) 2

6. Supplements*6

*The additive prepared in advance via the adsorption is carried 15 p.m liquid antifoaming composition, 10 am, thickening agent (polyurethane emulsion), 20 including the liquid surface is the bottom of the current weight, which has all the properties of a solid substance and has no signs of fluid.

Maleic resin (2) is a resin Rokramar 2051 (firm Robert Kramer, Bremen, Germany), having an acid number of about 150. Acrylic resin (3 and 1) is resin Joncryl 683 (firm Johnson), having an acid number of about 150. The amount of neutralizing agent (4) was chosen so that to neutralize the acid groups of component 1 3.

The ingredients are thoroughly mixed in an open vessel for about 25 minutes Then the mixture was continuously loaded in a friction mill of his own design. The atmosphere in the mill, and on the lines of loading and unloading, maintained substantially free from oxygen by means of continuous administration of the ceiling nitrogen gas in the line boot. For product temperature and nitrogen in the discharge line constantly observed: if this temperature is exceeded 40oC, the speed of loading solid particles was reduced.

Download speed solid materials controlled thereby, to receive from the mill dark yellow free current powder, not containing particles of dust, which was then screened to remove coarse, resembling sugar, beat in the mixing vessel 66 hours tap water and 10 am, ethanol or isopropanol. Paint, which is formed after about 10 to 20 min of stirring, the pH is about 8, and can be used for printing on paper or cardboard using flexographic and gravure printing after simple filtration, if necessary.

Example 2. Repeating the General procedure of example 1, but using the original composition comprising, in addition, 3 o'clock liquid plasticizer for the binder resin. This plasticizer was previously adsorbing on Silide. In addition, this composition contained 3 hours of acetylcellulose.

The resulting prints had the best Shine and elasticity.

Example 3. Colorless lacquer.

The following ingredients were mixed together and the mixture is further processed as described in example 1, h

Acrylic resin with an acid number of about 160 75

NaOH 3

Ammonium carbonate 10,5

Powder of polyethylene wax 1.5 to

Additives (fluent current solid substance) of 7.5

Supplements consisted of, including Siloed 50; antifoaming agent 5; plasticizer for acrylic resin 40; a liquid surface-active agent 5.

Transparently with excellent properties ol the mixture or only in water.

Example 4.

In the vessel for mixing portions and with stirring was added in an aqueous solution, containing, including the hydrate of sodium oxide to 0.5; ammonium carbonate 5; maleic binder resin 25; acrylic binder resin 5, both of which had an acid number of about 150. Watched the pH of the mixture was added ammonium carbonate to a final PH of 7.9. Got a transparent, viscous and colorless solution, which was then pumped to the spray dryer in which the temperature of the solid particles exceeds about 60oC.

Got a white powdery solid which is easily soluble in water. Used 27 PM this powder instead of component 2 and 3 in the composition of example 1. Component 4 of example 1 was replaced with some ammonium carbonate, which was calculated based on the acid number of the resin in the component 1.

Received powdered dry ink, and the liquid water paint was obtained from this powder, as was done in example 1. The dissolution rate of the paint of example 4 is even better.

The dry powder, which is the subject of the invention may be modified within the scope of this invention. For example, the liquid components necessary for ctii with well-known methods of canning. Instead of a solid neutralizing agent may be used a liquid neutralizing agent, if he is adsorbed on a porous solid carrier, or enclosed in microcapsules, etc.

1. Anhydrous powdered concentrate for preparing an aqueous printing ink or lacquer containing water-insoluble binder, characterized in that it contains as a binder 10 to 80 wt. resin with an acid number of 20 to 500 mg of sodium hydroxide per 1 g of resin, water-insoluble in its original state and soluble in water after partial or complete neutralization of the acid groups, and as a neutralizing agent, a basic compound, is able to evaporate when heated in the drying conditions after printing, in a quantity sufficient to transfer binder resin in a water-insoluble state.

2. Concentrate on PP.1 and 2, characterized in that it additionally contains a pigment.

3. Concentrate on PP.1 and 2, characterized in that it contains as a binder maleic acid or acrylic resin.

4. Concentrate on p. 4, characterized in that it contains maleic or acrylic resin with an acid number of 40 to 250.

5. Concentrate on PP.1 to 4, characterized in that it contains contains as an additional neutralizing agent primary connection, non-volatile under the conditions of drying after printing.

7. Concentrate on p. 6, characterized in that it contains as an additional neutralizing agent is sodium hydroxide or potassium hydroxide or carbonate of alkali or alkaline earth metal.

8. Concentrate on PP.1 to 7, characterized in that it further comprises a liquid target, the additive is adsorbed on a solid carrier.

9. Concentrate on p. 8, characterized in that it contains as adsorbed on a solid carrier liquid additives target substance selected from the group of the non, an additive that improves the print quality, a plasticizer, a thickener, a viscosity regulator, a surfactant and emulsifier.

10. Concentrate on PP.1 to 9, characterized in that it further comprises an auxiliary neutral water-soluble resin for printing inks.

11. The method of obtaining anhydrous powdered concentrate for preparing an aqueous printing ink or varnish by mixing in the dry state water-insoluble binder with its other components, characterized in that in use as a binder resin with an acid number of 20 to 500 mg of ecolocalizer acid groups, and mix it in the amount of 10 to 80 wt. with a neutralizing agent in the form of a basic compound, is able to evaporate when heated in the drying conditions after printing, taken in sufficient quantity to transfer binder resin in a water-insoluble compound.

12. The method according to p. 11, characterized in that the obtained mixed powder is sifted to separate particles larger than 50 microns.

 

Same patents:

The invention relates to printing inks, in particular to a protective inks screen printing, designed for the manufacture of printed circuit boards, glass boards, indicators, marking panels

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

The invention relates to the printing industry, in particular to the ink for printing offset on non-absorbent surfaces of the metal foil, glass, porcelain and so on

FIELD: polymer materials.

SUBSTANCE: polyurethane resin is a product of reaction of at least one diisocyanate component and isocyanate-reactive components having first group of at least one polyol, second group of at least one polyol, and third group of at least one polyol, at least one amine, and, additionally, reaction-stopping agent, all polyols of the first group having average molecular mass between 1000 and 10000 g/mole, those of second group having average molecular mass between above 10000 and 20000 g/mole, and those of third group having average molecular mass equal to or higher than 800 g/mole. Ratio of diisocyanate component to isocyanate-reactive components is selected such that all isocyanate groups are present as products of reaction with isocyanate-reactive functional groups. Resin is used as film-forming binder in coating compositions, in particular in printing inks for printing on polyolefin substrates. Printing ink is preferably used for manufacturing printed layered articles.

EFFECT: increased gluing ability and heat resistance of ink laid on plastic substrate.

41 cl, 2 tbl, 12 ex

FIELD: dyes.

SUBSTANCE: invention relates typography dyes, in particular, to dye for deep printing. Invention describes dye for deep printing comprising the first binding agent chosen from group of water-soluble or water-diluted acrylate oligomers, photoinitiating agent and, optionally, a monomer as the second binding agent chosen from group consisting of water-soluble or water-diluted monomers of polyethylene diacrylates or polyethoxylated triacrylates used for correction of the composition dye viscosity value. Dye can comprise additives, such as pigments, filling agents, photosensitizing agents, photostabilizing agents and special pigments. Dyes shows viscosity value from 7 to 60 Pa . s at temperature 40°C and dispersed completely in aqueous washing off solution with sodium hydroxide in the concentration from 0 to 0.5 wt.-%. Dyes possesses the excellent capacity for paint removing and it is can be precipitated from the indicated washing off solution.

EFFECT: improved and valuable properties of dye.

28 cl, 9 ex

FIELD: dyes.

SUBSTANCE: invention relates to composition of aqueous dye used in stenciling, to a method for preparing indicated composition of stenciling, using indicated dying composition for stenciling and to securities printed using indicated dying composition. Invention describes composition of aqueous dye for stenciling containing the following components: (a) emulsion of acrylic or urethane-acrylic copolymer taken in the amount 30-70 wt-%, preferably in the amount 35-60 wt.-%, and more preferably in the amount 40-55 wt.-% of self-cross-linking emulsion of acrylic or urethane-acrylic copolymer as measured for the total mass of composition; (b) cross-linking agent taken in the amount 0.25-3 wt.-%, preferably in the amount 0.5-2 wt.-%, and more preferably in the amount 1-2 wt.-% of mass indicated cross-linking agent as measured for the total mass of composition; (c) optional catalyst; (d) optional pigments, and (e) optional additives and wherein indicated cross-linking agent comprises at least two different functional activity in a single molecule. The first functional activity is chosen by so manner to form a covalent bond with indicated polymer before printing and the second of indicated functional activities is chosen by so manner to carry out cross-linking indicated polymer for hardening printed dye. Emulsion of acrylic or urethane-acrylic copolymer is chosen from group possessing self-cross-linking property and wherein the composition shows pH from 7.0 to 8.5, preferably from 7.5 to 8.3 and more preferably from 7.5 to 8.0. Invention describes a method for preparing above said composition of aqueous dye for stenciling and comprising the following steps: (a) preparing emulsion of acrylic or urethane-acrylic copolymer; (b) optional preparing catalyst, optional pigments and optional additives; (c) preparing a cross-linking agent able to form a covalent bond under the first conditions with polymer prepared in (a), and cross-linking prepared polymer under the second conditions; (d) thorough mixing components prepared by points (a), (b) and (c) and providing interaction of polymer prepared by point (a) with a cross-linking agent prepared by point (c) under indicated first conditions; (e) regulation of pH value of the composition in the range from 7.0 to 8.5. Also, invention describes using the indicated composition of aqueous dye as a dye for stenciling and security document with signs printed by using indicated composition of aqueous dye. Proposed composition shows improved stability and improved toxicological properties in the combination and excellent stability of printed and hardened dye to chemical and physical effects.

EFFECT: improved properties of dye, improved preparing method.

14 cl, 6 ex

FIELD: light industry; composition of decorative coats for wallpaper; manufacture of pearly ink for intaglio printing on wallpaper.

SUBSTANCE: composition of proposed printing ink for wallpaper contains 16-16.5 mass-% of pearly pigment; 12-12.5 mass-% of ethyl alcohol; 46-46.4 mass-% of binder - acrylic latex of butyl acrylate copolymer (19-21%) and methacrylic acid (10-12%) and water; copolymer acrylic latex is produced by method of radiation emulsion polymerization of butyl acrylate, vinyl acetate and methacrylic acid under action of ionizing radiation at dose rate of 0.05-0.1 g/s to absorbed doses of 1.5-2 kgr.

EFFECT: avoidance of lamination of ink; easily washable ink; enhanced heat resistance of ink.

1 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention pertains to polyurethane resin, which is a product of a reaction between at least one diisocyanate and components, containing functional groups, which have capacity to react with isocyanates, with the following composition: (a) first group, which is formed by one or more polyester-polyols based on ethers, each of which has average molecular mass ranging from 400 to 12000 g/mol, (b) second group, formed by one or more poly hydroxilated resins, chosen from a defined group of resins, (c) optional third group, formed by one or more polyols, each of which has average molecular mass, equal to or less than 800 g/mol, which are also chosen from a defined group of polyols, and (d) at least one amine and a reaction chain-stopping agent. The ratio of equivalent masses of diisocyanate and components, containing functional groups, with capacity to react with isocyanates, is chosen such that, naturally all isocyanate groups of diisocyanate are present as a product of the reaction with one of the above mentioned functional groups, with capacity to react with isocyanates. The invention also relates to the method of obtaining the above mentioned polyurethane resin, to polyurethane resin obtained through such methods, to coating for plastic substrates, containing the proposed resin, as a polyolefin binding substance, to use of such a polyurethane resin as a film forming substance in printing ink for printing on plastic substrates, as well as to the method of obtaining a laminate, which has a layer obtained when printing an image, including stages (a)-(d), with use of coating from polyurethane resin, and to a laminate, obtained using such a method.

EFFECT: obtaining a coating from polyurethane resin, with good heat resistance and excellent initial adhesiveness.

20 cl

FIELD: chemistry.

SUBSTANCE: water based flexographic contains biodegradable polyhydroxyalkanoate (PHA) consisting of monomers having the following formula: where n is an integer from 1 to 5, and R1 is selected from a group comprising hydrogen, alkyl from C1 to C20, and alkenyl from C1 to C20, and having molecular weight ranging from 500 to 5000000 g/mol, binder substance which is three-block amphiphilic compound having two hydrophobic terminal areas with linear and/or branched aliphatic chains CnH2n+2, n = 1-40, and one central hydrophilic area - polyethylene glycol and its derivatives; or having one central hydrophobic area with linear and/or branched aliphatic chains CnH2n+2, n = 1-40, and two hydrophilic terminal areas, a solvent, and a dye or pigment in amount sufficient for leaving a visible mark on a base. Concentration of PHA in the ink ranges from 20 to 80% (weight/volume), concentration of the binder ranges from 0.5 to 20% (weight/volume), concentration of the solvent ranges from 1 to 25% (weight/volume) and concentration of the dye or pigment ranges from 1 to 40% (weight/volume). Described also is a method of preparing water based flexographic ink and a printing composition which contains the said flexographic ink.

EFFECT: improved biodecomposition properties.

13 cl, 6 ex

FIELD: textiles and paper.

SUBSTANCE: non-woven fabric is proposed, on the visible surface of which the ink composition is applied comprising from about 40 wt % to about 80 wt % of the dry weight of the ink of linking agent - aziridine oligomer with at least two aziridine functional groups. Also an absorbing article is proposed comprising a liquid-permeable upper layer, an absorbing core and a liquid-impermeable lower layer that contains the specified non-woven fabric with the said applied ink composition. The application of ink on the non-woven fabric can be carried out by the method of flexography or a method of ink-jet printing.

EFFECT: printed non-woven fabric has high resistance to abrasion even in case of its contacting with fatty substance.

16 cl, 2 dwg, 2 tbl, 2 ex

FIELD: printing.

SUBSTANCE: carrier based on high-density polymer is decorated with ink for printing, comprising at least one pigment and one binder. The binder is an oxygenised polyolefin wax in the form of an aqueous emulsion, and the wax has a Brookfield viscosity of less than 5000 mPa*s at 150C and a pH level of 28 to 32 mg KOH/g, and the said ink has a viscosity of less than 2000 mPa*s at 25C. The ink is applied in a continuous or discrete manner on at least one surface of the carrier. The subject of the invention is also a decorated carrier based on high-density polymer, a multi-layered product, and a method of manufacturing of a multi-layered product with a coating of the said ink.

EFFECT: creation of the ink of simpler composition and easier to use.

16 cl, 1 dwg, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polyamide-based printed films which are used as casings for food products, particularly artificial sausage casing. Disclosed is a printing ink system for printing on (co)polyamide-based films. Said system contains a radically curable primer ink and UV radiation radically curable printing ink which forms an almost colourless layer of primer ink. The primer ink contains a reactive compound which, in one molecule, contains a group capable of bonding with a (co)polyamide surface and an ethylenically unsaturated group which can undergo radical-initiated polyaddition. The invention also discloses a (co)polyamide-based single- or multilayer film which is printed with said printing ink system and a method for production thereof.

EFFECT: printing ink system enables to print on (co)polyamide-based food films with high adhesion to the film, resistance to friction, scratching even without an additional lacquer coat, mechanical and thermal processing, resistance to migration of ink components, which prevents foreign odours from food products.

27 cl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to organometallic latent catalytic compounds which are suitable as catalysts in polyaddition or polycondensation reactions which are catalysed by a Lewis acid type catalyst, particularly for cross-linking a blocked or non-blocked isocyanate or an isothiocyanate component with a polyol or a polythiol to form polyurethane. Polyaddition or polycondensation reactions are initiated by that a catalyst is released while holding in electromagnetic radiation in wavelength range of 200-800 nm. The latent catalytic compound has formula I or II, Me(FG)(m-x)Ax (I); Ax(FG)(m-1-x)Me-O-Me(FG)(m-1-x)Ax (II), where Me is Sn, Bi, Al, Zr or Ti; m is an integer from 1 to the coordination number of Me; x is an integer from 0 to (m-1); A is a C1-C20 alkyl, halogen, C7-C30 aralkyl, C1-C20 alkoxy group, C2-C10 alkanoyloxy group, C6-C18 aryl or C6-C18 aryl, which is substituted with one or more C1-C20 alkyls; and under the condition that if x is greater than 1, A are identical or different; and FG independently represents a group of formula (Z), (B), (C), (D), (E), (F), (G), (L) or (M)

,

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.

EFFECT: widening the operating window with a polymer mixture until the chain reaction begins.

12 cl, 14 tbl, 67 ex

Up!