Biodegradable flexographic ink and preparation method thereof

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

 

The technical FIELD

The invention relates to inks, and more specifically to the flexographic water-based inks, which have improved properties of biodegradation as a result of their composition.

PREREQUISITES CREATE

Inks used in flexographic printing processes or machines, high printing must adhere to any rollers paint machine, to moisten the drive roller, and then easily and evenly transferred to the printing substrate, forming a permanent connection.

The machine system of letterpress printing has a number of rollers that collects ink and forming a uniform film, which is then transferred by these rollers in the front with the letters. In the car letterpress are embossed letters mounted on a cylindrical printing roller. The roller, in turn, is covered by the ink on the relief parts, which form characters, and rotates in the direction opposite to the rotation of the paper or other printing substrate. Flexographic printing presses use anilox metering roller at the junction with the rolling rollers or doctor blade to provide a uniform layer of ink, which is then transferred onto the printing cylinder.

Currently, flexographic printing machines and machines for letterpress printing of Newspapers use characters from photoshows is indeed polymeric materials, which can be created directly from the light image. On polymeric cylinder when properly designed, there are relief areas that produce the printed image. This stereotype is mounted on a cylindrical shaft, which rotates in the direction opposite to rotation of the inking cylinder in order to coat the relief areas. These sites are rotated in the direction opposite to the rotation of the substrate (usually paper), which has as a basis ebonite roller.

For machines letterpress and flexographic systems, you can use ink systems as solvent-based and water-based. In any case, the usual practice is to mix the solvent or water with a binder, such as nitrocellulose, maleic anhydride, acrylic copolymers or derivatives of starch. The pigment is applied to the paper printed the shaft, and a binder is used to hold the pigment particles in place. In some cases, the pigment is carbon black, which is in the form of a suspension in a solution of aliphatic hydrocarbons with a high boiling point. In these ink no binder, but instead they penetrate into the paper as a result of diffusion of the oil into the paper, leaving, therefore, much of the blackened layer of carbon-saii oil on the surface of the paper. The disadvantage of these systems on the basis of oil is the fact that, since the seal does not chemically associated with paper, it can easily be soiled by contact. In addition, the ink tends to contaminate various tracing rollers in the system, creating a background.

Composition flexographic water-based inks in General contain a pigment, a polymer resin, the binder or wax, an organic solvent and water. Such compositions vary depending on the characteristics of raw materials of the required quality, as well as various properties provided by different manufacturers. In recent years there is a tendency to reduce the content of volatile organic solvents to limit their impact on the environment. Currently flexographic water based inks typically contain from 5 to 20% of organic solvents. Although they are harmful, their use cannot easily be stopped, as they help to reduce the drying time of the ink after being struck on the surface (paper, cardboard, plastic etc). It was taken just a few other specific attempts to improve the environmental aspect of the flexographic ink. Therefore, they still consist of not undergoing biodegradation or only to a small extent biodegradable p is mentov and polymer resins, which, in General, accumulate in the processes of leaching paint in the residues after treatment or incorporated into the soil at the disposal of the final product. There are already biodegradable pigments, but they do not provide the best properties in comparison with synthetic pigments. Traditional songs flexographic inks typically consist of acrylic, methacrylic, epoxy and styrene polymer resins. Actually, acrylic and epoxy polymers are present in 90% of the songs flexographic ink.

U.S. patent No. 5,004,664 describes a toner composition containing particles of a semicrystalline polyester polymer, polyhydroxyalkanoates and their copolymers, as well as pigment particles. This application is applicable only for electrostatic printing.

In U.S. Patent No. 5,114,479 describes the use of enriched suspensions of latex as a binder for ink mixtures dye/latex for deep and flexographic printing on newsprint and corrugated paper. The authors use water-soluble polymers based on acrylic and methacrylic acids.

Taheri and colleagues reported in U.S. Patent No. 5,120,360 about the use of microcapsules containing ink for flexographic applications. The authors describe that the encapsulating ink provides the best adhesion and fluidity. Polim the market, used to microencapsulate consist of methacrylate or acrylate with a molecular weight of from 3000 to 50000 g/mol.

Vanderhoff and Hobart reported in U.S. Patent No. 5,830,927 of the ink, which does not include volatile organic solvents and contains a water-soluble polymer such as polyvinylpyrrolidone, polyacrylamide, polyacrylic acid, polyvinyl acetate, polyvinyl alcohol and the like.

Takashi and colleagues report in the Japan Patent No. 8092518 about biodegradable ink composition based on a polymer of lactic acid without the use of any organic halogenated solvents.

On the basis of the above patents and publications that represent the modern technical level, it is clear that there is still large room for improvement in the production of compositions flexographic water-based inks with improved environmental properties.

DISCLOSURE of INVENTIONS

One of the purposes of the present invention is a composition flexographic ink containing a biodegradable polymer, binder and solvent. Another objective of the present invention is the provision of a method of manufacturing an ink having the above-mentioned composition.

Composition flexographic ink may also contain a dye or p is gment, which at a concentration of from 1 to 40% (weight/volume) or in an effective amount to provide a visible mark on the substrate.

In the present invention, the polymer may be a synthetic or natural polymer may be selected from the group consisting of polyhydroxyalkanoate (GAA), a polymer of lactic acid (PLA), poly-(lacto-glycolic) acid (PLGC), polyglycolic acid (PGA), polycaprolactone (PCL), polyvinyl alcohol (PVA), polymer derivatives of adipic acid or aminocaproic acid, polybutylmethacrylate, or their derivatives, or mixtures thereof.

The binder may be amphiphilic compound that is biodegradable, and the solvent may contain water or an organic solvent, such as alcohol.

Preferably, the biodegradable polymer is present in a concentration of from about 20 to 80% (weight/volume), binder in a concentration of from about 0 to 20% (weight/volume), and the solvent in a concentration of from about 1 to 25%.

The dye can be a water-soluble dye, a basic or acidic dye.

The present invention also relates to a method for production of the composition flexographic water-based inks, comprising a biodegradable polymer, such as PGA.

Another objective of the present invention is to improve the properties of bioradar the Deposit composition flexographic water-based inks in the use of biodegradable compounds.

For the purposes of the present invention the following is an explanation of the following terms:

The term "biopolymer" is here intended to denote polymers obtained from natural or renewable sources, for which the mode of synthesis is carried out naturally, as well as in plants or microorganisms. GAA are good examples in accordance with this definition.

The term "polymer" is here intended to refer to macromolecules synthesized by chemical reaction or derived from petrochemical sources, even if one of the components (monomer, the connection predecessor, etc.) was obtained from natural or renewable sources. Polymeric lactic acid (PLA)polyglycolic acid (PGA), poly-(lacto-glycolic) acid (PLGC), polyvinyl alcohol (PVA) and polycaprolactone (PCL) can all be considered as polymers in accordance with this definition.

The term "binder" is here intended to denote amphiphilic chemical compounds, which, both hydrophobic and hydrophilic. Due to this special structure of the binder is able to form compounds with the polymer granules, such as PGA and PLA, or other insoluble hydrophobic compounds, such as pigments.

The term "pigment" here, art is meant to denote a dye-based inorganic or organic particles, which do not dissolve in water or solvents. Usually they form an emulsion or suspension in water.

The term "dye" is here intended to refer to dye natural or synthetic origin, which is soluble in water or solvents.

The term "biodegradable" is here intended to denote properties of the polymer or biopolymer, which is subjected to chemical or enzymatic hydrolysis, leading to reduction in their molecular weight, i.e. collapses, forming smaller parts, which are non-hazardous to the environment. Further, these smaller parts are absorbed by microorganisms and used as energy sources, such as PGA. Thus, at the end of their life cycle GAA transformed into water and carbon dioxide. The term "biodegradable" here is also intended to refer to properties of chemical substances, other than of polymers or biopolymers, which are subject to uptake by bacteria, in which they metabolize.

The term "pellet" or "particle" is here intended to denote a polymer segment of a spherical shape with particle size distributions from 0.01 to 10 μm, preferably from 0.1 to 5 μm. The term "pellet" and "particle" is also here used to refer to pigments with particle size distributions from 0.01 to 20 μm, p is impactfulness from 0.1 to 10 microns.

The term "latex" is here intended to denote a suspension of granules GAA and/or particles in the aquatic environment. Granules GAA may be in their natural state or re-suspended in water. Natural GAA is defined as granules PGA obtained by bacterial fermentation, which were not precipitated, therefore, their degree of crystallization remains close to or slightly higher than that in bacteria, i.e. very weak. Latex can be in the form of milk in color and structure, while its viscosity may be similar to the viscosity of water.

EXAMPLES of carrying out the INVENTION

Hereinafter the present invention will be described in more detail. This invention may, however, be embodied in numerous diverse forms and should not be interpreted as limited only options presented here; to some extent these options are designed to ensure that this disclosure was thorough and complete, and fully convey the scope of the invention for those who has the appropriate knowledge.

In accordance with the present invention here flexographic water-based ink and a method of manufacturing a flexographic particle-based solvent, such as water, and a biodegradable polymer resins.

In accordance nastojasim invention here flexographic water-based ink, which introduced a biodegradable polymer resin.

Applicants have found that GAA in the form of latex are suitable raw materials or polymeric resins that can be used for applications in flexographic water-based inks. Further, Applicants have found a method of preparing compositions flexographic water-based inks, including biodegradable PGA resin. GAA latex, which contains a pigment and a binder, forming a stable composition in the water.

The ink composition containing a poorly or completely biologically non-degradable organic polymer resin, substituted biodegradable polymers, such as polyhydroxyalkanoate (GAA), lead to a final product, which has improved characteristics of biodegradation with physicochemical properties similar to modern commercial products.

Polyhydroxyalkanoate (GAA) are natural biopolymers, which are received in recent times and continue to cause increased interest in the scientific community and industry. GAA attract such attention due to their properties of biodegradation. In fact, among a large number of polymers and biopolymers, currently available, GAA belong to a limited class of certain biodegradable polymers. When placed in oppostie pit, in the soil or immersed in the marine environment GAA decompose to 100%. However, the failure does not occur in the case when this product is in the atmosphere as well as solar irradiation, i.e. in the period of operation. Products produced from GAA, retain their physical and chemical properties, and mechanical properties, as they are not placed in conditions in which they decompose.

GAA are polyesters obtained and accumulated by microorganisms, such as bacteria and algae. GAA are present within cells in the form of granules. These granules act as carbon sources of energy and biologically synthesized in adverse conditions, when the content of major nutrients such as nitrogen, oxygen or phosphorus, is limited. In such conditions, bacteria can't multiply and switch their metabolism to the production of PGA in order to have a source of carbon and the return to normal conditions. Therefore, the strategy of supply becomes a critical stage, which has a direct impact on the yield in the production of the biopolymer. The power supply is also an important factor that determines the nature of the resulting polymer. In fact, various Homo - or copolymers can be obtained by varying the sources of Pete the deposits of microorganisms during the fermentation process. The most known representatives of the family GAA are poly-3-hydroxybutyrate (FCB)and its copolymer poly-3-hydroxybutyrate-3-hydroxyvalerate (PHBV).

As previously mentioned, the main characteristic of the GAA, which easily distinguishes them among chemically synthesized and petrochemical derivatives of polymers is their tendency to decompose naturally and completely when placed in the compost pit, soil or marine sediments. Most landfills are inhabited by microorganisms that secrete enzymes that destroy the biopolymers on the Monomeric portion. The monomers are then used as a carbon source for improving the growth of microorganisms.

Another useful aspect of the GAA is good machinability on traditional equipment for thermoplastic products, such as other polymers or resins. For example, of the GAA in the processing result can be obtained films, sheets, fibers, foams, molded articles, as well as many other products. As a result of these facts GAA are very attractive biopolymers, which are attracting increasing attention in the last ten years. Industrial application of GAA includes the production of bottles for shampoo, coated cardboard, drinking cups, filter balls for denitrification of water and biodiversity is agemy commercial credit cards. Other applications, identified with the first publications in this area relate to the field of food packaging, coatings, plastic tableware items, dyes and food additives.

In one embodiment of the present invention connecting the connection is triple a compound which has both hydrophilic and hydrophobic properties. At least one triple compound possessing both hydrophilic and hydrophobic properties, can be added to a solution of latex with a pigment. This solution was slightly heated in order to dissolve the binder and homogeneous mix all ingredients. The resulting solution is very stable composition flexographic water-based inks.

In one embodiment of the present invention flexographic water-based ink made from natural solutions latex GAA biopolymer includes triple connection, have greater uniformity, stability in time and less prone to sedimentation.

The biodegradable polymer can include polyhydroxyalkanoate, lactic acid polymer, polyglycolic acid, polycaprolactone, polyvinyl alcohol, polyvinylpyrrolidone or copolymers.

This invention is applicable to create biorasi is made of polymers for the compositions flexographic water-based inks of the PGA of biopolymers any type, derived from plants or microorganisms, both natural and genetically engineered and chemically synthesized PGA polymers.

GAA biopolymers may include polyesters comprising monomer units having the formula:

where n is an integer from 1 to 5, a R1is H, alkyl or alkenyl. Alkyl and alkeneamine side chains preferably a length of from C1to C20the carbon atoms. GAA biopolymers can be homopolymers with the same repeating Monomeric units and/or copolymers with at least two different repeating monomer units. The copolymers can be random, block, periodic or grafted. The molecular weight of the PGA of biopolymers is in the range from 500 to 5000000 g/mol, preferably from 1000 to 2500000 g/mol, and still more preferably from 2500 to 1,000,000 g/mol. The orientation of the monomers can be "head to head", "head to tail" or "tail to tail".

GAA, which can be used in accordance with this invention may include poly-3-hydroxybutyrate, poly-3-hydroxyvalerate, poly-3-hydroxyethanoic, poly-3-hydroxyoctanoic, poly-4-hydroxybutyrate, polyhydroxyalkanoate with medium chain length poly-3-hydroxybutyrate-3-hydroxyvalerate, poly-3-hydroxybutyrate-4-hydroxybutyrate poly-3-hydroxybutyrate-3-hydroxyoctanoic, as well as their other copolymers. Listed here are the PGA copolymers generally contain from 40 to 100% of the monomer 3-hydroxybutyrate, and preferably from 60 to 98%.

In accordance with this invention, the concentration of PGA in solutions of latex is from 1 to 50%, preferably from 5 to 45%, and more preferably from 10 to 40%. Concentration expressed as weight/volume. Latex can be obtained from a natural polymer, or from re-suspended dry powder. The origin of the biopolymer can also refer to those that are crystalline, or re-transferred to the amorphous state using the methods described in International Patent Publication WO 9964498, which is here incorporated by reference.

In accordance with this invention in its first aspect, the mixing and heating of the GAA latex binder and pigment are obtaining compositions flexographic water-based inks, including biodegradable polymer resin. These flexo water-based ink remain stable over time and not deposited. This behavior can be explained by the fact that hydrophobic end part of the binder associated with the hydrophobic granules or particles present in the environment, such as the GAA and the pigment, whereas the hydrophilic part of the binder in the society has the capacity and stability in the aquatic environment. As a result, the product looks like a cream, i.e. improved viscosity, sedimentation or stability compared with the initial individual products.

The use of biodegradable polymer allows you to create a flexographic water-based ink with improved properties, biodegradation, and as a result, they have a less harmful impact on the environment, for example, when you place the final product in a compost pit or leaching of the dye formed is less toxic residues.

One triple structure of a chemical compound corresponds to two hydrophobic end regions and one Central hydrophilic region. It is believed that the hydrophobic end region easily associate through hydrophobic-hydrophobic weak interactions with the hydrophobic polymer chains GAA present in the environment. We can assume that a similar interaction may occur with the participation of the pigment. A similar phenomenon is accepted and triple compounds having at least one hydrophobic middle part and two hydrophilic end part. Additionally, a similar phenomenon is accepted and amphiphilic compounds, i.e. double, having hydrophilic and hydrophobic properties. However, it is believed that such systems provide less stability over time and less time sedim is ncacii.

Hydrophobic region may contain, for example, linear and/or branched aliphatic chain CnH2n+2starting with C1to C40. In the case of a triple pattern with hydrophobic regions at both ends enough so that one end was long enough to interact with chains GAA or pigment particles, the other may be shorter. Also discusses linear and/or branched unsaturated alkyl chain length from C2to C40with one or more unsaturated bond, including one or more aromatic substituents.

The hydrophobic region may contain one or more heteroatom (nitrogen, oxygen, sulfur, chlorine, fluorine, etc.), single or mixed. For example, polypropylenglycol is a hydrophobic compound with oxygen heteroatom in the main polymer chain and side-alkyl group, namely metal group.

The hydrophobic region may, for example, consist of saturated fatty acids with an alkyl chain from C10to C30and preferably from C14to C24for example, lauric, myristic, palmitic, stearic, arachnid, beganovic, lignoceric acids. The hydrophobic region can also be an unsaturated fatty acid having one or more unsaturated alkyl chain from C10to C30and preferred elinee from C 14to C24for example, palmitoleic, oleic, linoleic, α-linolenic, γ-linolenic, arachidonic, eicosapentaenoic and Neronova acid. Triple compounds consist of one or two fatty acids at their ends.

The hydrophilic region may, for example, contain non-ionic chemical groups, such as polyalkylene, especially polyethylene oxide, glycoside, or polyglycerol, or aminoxide. The hydrophilic region may contain ionic groups, such as carboxylate, sulfate, sulfonate, phosphate, phosphonate or ammonium. Hydrophilic group triple compound may contain more than one chemical compound from the list above. Most suitable for the hydrophilic part is polyethylene glycol and its derivatives with the formula:

HO-(CH2-CH2-O)n-H

where n is an integer ranging from 1 to 2500, preferably from 3 to 500.

The hydrophilic region may also be a hydrophilic polymer or a biopolymer, such as polyvinyl alcohol, polyvinyl acetate, polyepichlorohydrins, polyacrylates and their derivatives, and cellulose and its derivatives (polysaccharides).

The number, as well as the chemical structure of triple compounds, added to the biopolymer or polymer to obtain a composition flexographic water-based inks, affect Ascot final composition. In fact, you can affect several parameters of triple compounds, such as the number of three-block copolymers compared to biopolymers, polymers or pigments, the total molecular weight triple connection, the length of the hydrophilic block, the length of each hydrophobic block. Other parameters can be modified to achieve the desired viscosity and properties of the final product. It can be, but not limited to, molecular weight polymer resin, and the amount and chemical nature of the pigment or dye. When the selection of some or all of these options, you can choose the characteristics of the final composition. In fact, a small amount of triple connection may not be sufficient hydrophobic-hydrophobic interactions, to increase the sedimentation of the biopolymer and pigment. When the molecular weight of the polymer resin is reduced to a certain concentration, it is possible to achieve acceptable stability, and additive binders may be optional.

In accordance with the present invention the concentration of the binder can be from 0 to 20%, preferably from 0.5 to 15%, and still more preferably from 1 to 10%. Concentration expressed as weight/volume. The binder can be used alone or in a mixture, at least from 2 to several decad is in or so, the same or a different concentration. The nature of the added binder may also vary. For example, triple connection short circuit and the other with a long chain. In addition, you can add one or more amphiphilic compounds with one or more triple connections.

In accordance with this invention the use of biodegradable binder together with a biodegradable polymer allows you to create a flexographic water-based ink with improved properties, biodegradation, and as a result they have less adverse effects on the environment, for example, when you place the final product in a compost pit or leaching of the dye formed is less toxic residues.

Pigments are the second important component of the composition flexographic water-based inks. All available pigments are suitable in accordance with this invention, if they are in the form of powder or paste. The molecular weight of the pigment, and charge (cationic, anionic or neutral) does not affect the results of this invention.

In accordance with the present invention, the concentration of pigment is preferable from 1 to 40%, preferably from 2.5 to 35%, and even more preferred from 5 to 30%. Concentration expressed as weight/volume.

The pigment may be replaced by dye in the same concentration range. Like there are numerous pigments dyes, and they are all suitable for this invention.

In accordance with this invention the use of biodegradable pigment or dye together with a biodegradable polymer and a binder allows you to create a flexographic water-based ink with improved properties, biodegradation, and as a result they have less adverse effects on the environment, for example, when you place the final product in a compost pit or leaching of the dye formed is less toxic residues.

Volatile organic solvents suitable for this invention include all organic solvents, miscible with water and having a boiling point below 100°C, or solvents that form an azeotropic mixture with water, which reduces their boiling point. Preferred volatile organic solvents belong to the family of alcohols, for example isopropyl alcohol.

In accordance with the present invention the concentration of the volatile organic solvent is preferred from 0 to 25%, more preferred from 1 to 20%, and even more preferred from 2 to 15%. Concentrations are expressed as volume/volume.

In compliance and with the present invention, the remainder of the solution may be water. The concentration of water may be from 20 to 80%, preferably from 30 to 70%, and more preferably from 40 to 60%. Concentrations are expressed as volume/volume.

In one embodiment of the present invention the solution is heated to dissolve the binder and homogenize all the components. The temperature of the heating is in the range from 25 to 80°C, preferably from 27,5 to 75°C., and more preferably from 30 to 70°C.

Unlike the previously created flexographic water-based inks adhesion of water-soluble dyes to the substrate does not occur in the result of the transformation of water-soluble dye in a water-insoluble reaction product, for example, in the reaction with carefully selected binder or polymer. Suppose that the adhesion of the water-soluble dye in the ink for flexographic printing in accordance with the present invention mainly is a result of penetration into the substrate together with the polymer and binder. Excellent fixation on the substrate occurs partly due to cover and protect the dye as the binding substance and a polymer, and partly because of the hydrophobic nature of the print, which can only be achieved through the presence of a wax component.

In accordance with one variant of the present invention in flexographic inks can b shall be added to the softener or thickener.

Softeners or thickeners used in flexographic inks in accordance with the present invention may contain glycols, and in particular derivatives of glycols, such as complex and ethers, glycols, and aromatic esters.

Thickeners or substances, modifying rheological properties, used in flexographic inks in accordance with the present invention may contain inorganic substances, such as kaolin and colloidal silica, and organic substances such as aqueous dispersions of high polymer acrylic polymers and cellulose derivatives.

Other additives may be surface-active agents and dispersing agents.

Since the choice of dye can be made virtually freely, i.e. regardless of the choice of binder, it is possible to get ink for flexographic printing of all possible shades even in the case when the components of the dye used in printing ink, selected exclusively from the group's environmentally friendly dyes.

When the formulation ink contains a pigment, it is convenient to add a dispersant selected from cationic, anionic or preferably, non-ionic dispersant. Such dispersing agents are often present in commercially available pigments.

Formulation ink deflectograph printing can be prepared in a concentrated form, which is then diluted with water before use in the printing process. Ink for flexographic printing, in accordance with this invention can be distributed in the form of a concentrate containing a solvent mainly composed of water, dye or pigment, binder, additives and containing biodegradable polymer latex dispersed in water.

In accordance with yet another aspect of this invention, the printing on the substrate using a flexographic process printing can be achieved when applying the above flexographic ink on the substrate, and imposed the ink is then subjected to conditions sufficient to fix the print, if necessary with the application of heat.

Ink for flexographic printing is particularly well suited for printing on cellulosic nonwoven materials, especially paper and cardboard using the method of flexographic printing. In addition, in accordance with this invention ink for flexographic printing can also be used for printing on non-absorbent substrates, for example, plastic films.

In accordance with another variant of the present invention are substrates, which remains constant print obtained by using the ink for flexographic printing in the accordance with the present invention.

Supplements to transfer ink is usually chosen from esters of rosin, synthetic film-forming polymers, polyamides, alkyd resins and proteins, including casein, gelatin and soy protein. The choice of additives depends on the characteristics of the used substrate, each type of fibrous or film material has special requirements for optimal adhesion, as it is known from the usual practice in these areas.

Colorants or dyes may be organic or inorganic. Typical examples of the dyes are dyes and pigments. The selection of the suitable dyes can be carried out with customary practices for these areas.

Basic flexographic dye (black, Magenta, cyan and yellow) can be obtained using the present invention, as well as white and all color panel obtained by mixing them.

The present invention is much easier to understand using the following examples, which are given to illustrate the present invention and not to limit its scope.

EXAMPLE I

Cooking black flexographic water-based inks containing GAA

Isopropanol (6 ml) was added in water (18 ml) at room temperature. Then to the solution was added 5 g of polyethylene glycol distearate (molecular is esom 6000 g/mol), then was stirred until complete dissolution of solids.

This solution is added to 76 ml of latex GAA (with a concentration of 40% PGA with a molecular weight of 1,000,000 g/mol and a polydispersity of 2). Pigment, carbon black (23 g)was added to this solution with vigorous stirring, while the temperature was raised to 40°C. Heating and stirring were continued for 2 hours, then cooled to room temperature.

The resulting solution is composed of flexographic ink, which remains stable over time. After several months of storage was not observed any sedimentation.

EXAMPLE II

Preparation of blue flexographic water-based inks containing GAA

The Protocol implemented in the Example I was repeated with dye methylene blue (5 g). There was obtained a similar result for the physico-chemical characteristics and stability.

EXAMPLE III

Cooking substitute for yellow acrylic flexographic ink

50 ml of yellow acrylic dispersions, water-based Room 486305 added to 200 ml of latex (concentration GAA 23%, a molecular weight of about 1,000,000 g/mol). The solution is homogenized and heated to 60°C. When the temperature stabilized, added 4 g of polyethylene glycol of distearate (molecular weight 6000 g/m is l). The solution was cooled to room temperature, when all the components were mixed to create a homogeneous solution.

This solution was applied to Kraft paper and paper made by hand at low tide and with good results. It was shown that the printing process gives the desired results and confirmed that the ink described here on the basis of the biopolymer are a good replacement flexographic ink available on the market currently.

EXAMPLE IV

Cooking substitute for yellow acrylic flexographic ink

Was prepared solution, similar to that described in Example III except that used GAA had a lower molecular weight, less than 100000 g/mol. The results obtained for Kraft paper and paper hand castings were similar to that obtained in Example III.

EXAMPLE V

Cooking substitute for yellow epoxy flexographic ink

Was prepared solution, similar to that described in Example IV except that used the yellow pigment was a yellow dispersion of ester epoxy water-based Room 4886317. This sample provided good results when applied to Kraft paper or paper hand casting.

EXAMPLE VI

Preparation of flexographic ink from GAA water-based

To water (18 ml) add isopropane is l (6 ml) at room temperature. Then to the solution, which was shaken until complete mixing of the liquids, add 25 ml poloxamer R.

This solution is added to 51 ml of latex solution GAA (concentration of 50% in GAA with a molecular weight of 1,000,000 g/mol and a polydispersity of 2). To this solution add pigment, carbon black (23 g) with vigorous shaking until the temperature rises to 40°C. the Heating and stirring continued for 2 hours, then the temperature was again lowered to room temperature.

The resulting solution corresponds to the composition of the flexographic ink, which over time has remained stable. No sedimentation was observed after several months of storage.

At that time, as the invention has been described in connection with specific options, it should be understood that further modifications, and its application is intended to cover any variations, applications and devices of the present invention, following, in General, the principles of the present invention and including such departures from the present narrative, which are among the famous, or are standard practice in the areas belongs to this invention, and if it can be applied to the essential features set forth above, and applies to the following statement contained in the application is the AI.

1. Flexographic water-based ink containing
biodegradable polyhydroxyalkanoate (GAA), consisting of monomers having the following formula:

where n is an integer from 1 to 5, a R1is selected from the group consisting of hydrogen, alkyl from C1to C20and alkenyl from C1to C20and having a molecular weight of from 500 to 5000000 g/mol,
binder, representing a three-block amphiphilic compound having two hydrophobic end region having linear and/or branched aliphatic chain CnH2n+2n=1-40, and one of the Central hydrophilic region is a polyethylene glycol and its derivatives; or having one Central hydrophobic region, with linear and/or branched aliphatic chain CnH2n+2n=1-40, and two hydrophilic end region,
solvent, and
the dye or pigment in an amount sufficient to leave a visible mark on the base,
where the concentration of the specified GAA is from 20 to 80% (weight/volume), the concentration of the specified binder is from 0.5 to 20% (weight/volume), the concentration of solvent is from 1 to 25% (weight/volume), and the concentration of dye or pigment is from 1 to 40% (weight/volume).

2. Flexographic water-based ink according to claim 1, where the specified dye or PI is a COP are biodegradable.

3. Flexographic water-based ink according to claim 1, where the specified solvent is a water or organic solvent.

4. Flexographic water-based ink according to claim 3, where the specified organic solvent is a hydrophilic organic solvent or alcohol.

5. Flexographic water-based ink according to claim 1, where the specified dye is a dye that is soluble in water.

6. Flexographic water-based ink according to claim 1, where the specified dye is a basic or acidic dye.

7. Flexographic water-based ink according to claim 1, which additionally contain at least one softener, thickener, dispersant, one surface-active substance or mixtures of these substances.

8. Flexographic water-based ink according to claim 1 where the concentration of the specified binder is preferably from 0.5 to 15% (weight/volume).

9. Flexographic water-based ink of claim 8 where the concentration of the specified binder is preferably from 1 to 10% (weight/volume).

10. Flexographic water-based ink according to claim 1, where the specified binder is a polyethylene-glycol distearate.

11. Composition for printing on non-fouling substrates containing flexographic ink p the claim 1 and an additive to transfer the ink.

12. Method of preparation of flexographic ink according to any one of claims 1 to 10, characterized in that it comprises mixing a biodegradable polymer of polyhydroxyalkanoate, triple amphiphilic compounds, solvent and dye or pigment in an amount sufficient to leave a visible mark on the base, the concentration of the specified dye or pigment is not less than 1%, and heating the mixture.

13. The use of biodegradable polyhydroxyalkanoate (GAA), consisting of monomers with the following formula:

where n is an integer from 1 to 5, a R1is selected from the group consisting of hydrogen, alkyl from C1to C20and alkenyl from C1to C20and having a molecular weight of from 500 to 5000000 g/mol,
in combination with the binder, which represents a three-block amphiphilic compound having two hydrophobic end region having linear and/or branched aliphatic chain CnH2n+2n=1-40, and one of the Central hydrophilic region is a polyethylene glycol and its derivatives; the solvent and the dye or pigment in an amount sufficient to leave a visible mark on the base, in the manufacture of flexographic water-based inks.



 

Same patents:

FIELD: printing industry.

SUBSTANCE: invention relates to ink for jet printing containing at least one dye-stuff, besides: dye-stuff is a compound represented by the following formula (I), or its salt; dye-stuff content (wt %) is 3.0 wt % or more to the total weight of ink for jet printing; in distributing molecules aggregates in ink for jet printing with dye-stuff concentration determined as 3.0 wt %, according to scatter range, measured using method of small-angle x-ray scattering, scatter distance value (d75 complying with the fact that 75% of distributing is 3.0 wt %) is 6.50 nm or more and 7.10 nm or less: common formula (I) , where M means alkali metal or ammonium; I means from 0 to 1, m means from 1 to 2, and n means from 2 to 3 under condition that l+m+n=3 and position of substituent replacing is position 4 and 4.

EFFECT: obtaining ink for jet printing.

3 cl, 1 ex, 9 tbl, 9 dwg

FIELD: chemistry.

SUBSTANCE: polyalkenamine compositions, intended for fuel or oil additive, method for production of such additives, as well as formulation of fuel and formulation of oil, additives set, and application of such compositions as an additives, particularly as an additive for fuel cleanability improvement in injection systems of combustion engines with forced ignition. Polyalkenamine composition include at least one polyalkenamine in solvent, chosen from the group, containing components L1 and L2 mixture, where L1) represents at least one n- or iso-C10-C14-paraffin, and L2) represents at least one C10-C14-naphthene, L1 to L2 proportion being from 10:90 to 90:10.

EFFECT: improvement of polyalkenamine composition processing characteristics.

18 cl, 3 tbl, 3 ex

FIELD: dyes and pigments.

SUBSTANCE: invention relates to a method for preparing an aqueous dispersion wherein water-insoluble dye is dispersed stable in an aqueous medium containing water and that is used as ink, respectively. Invention describes an aqueous dispersion comprising particles including water-insoluble dye and a polymeric compound or surface-active substance wherein its hydrophilic moiety is formed by at least one group taken among the group consisting of carboxyl, sulfonic, phosphorus, hydroxyl and alkylene oxide group. Particles are dispersed in water-containing medium and dispersion shows intensity of light scattering 30000 imp/s, not above, when it comprises sufficient amount of particles and to provides value of absorption peak with respect to visible light = 1 and particles give the same color as a water-insoluble dye in crystalline state. Also, invention relates to a method for its preparing involving the following stages: (1) preparing a solution containing water-insoluble dye and a dispersing agent dissolved in aprotonic water-soluble organic solvent in the presence of alkali; (2) mixing the solution with water and preparing the dispersion containing particles comprising water-insoluble dye and dispersing agent. Also, invention describes particles comprising water-insoluble dye and polymeric compound or surface-active substance wherein its hydrophilic moiety is formed by at least one group taken among the group consisting of carboxyl, sulfonic, phosphorus, hydroxyl and alkylene oxide group provides the same color as water-insoluble dye in crystalline state and having colored moiety with water-insoluble dye and non-colored moiety wherein non-colored moiety exists in the round region with radius 40 nm and wherein its center is the required point in a particle. Also, invention relates to a method for their preparing that involves the following stages: (A) preparing an aqueous dispersion; (B) formation of aggregate consisting of dispersion particles and isolation of aggregate from the dispersion; (C) conferring to particles in aggregate the capacity for repeated dispersing and wherein the stage (B) involves sub-stage of addition of acid to the dispersion to form aggregate, and the stage (C) involves sub-stage of treatment of aggregate with alkali to confer particle in aggregate the capacity for repeated dispersing, and ink containing particles described above. Proposed ink provides printing with excellent quality by color and clearness that are resistant to water and light.

EFFECT: improved preparing method, improved and valuable properties of dispersion and ink.

19 cl, 16 tbl, 1 dwg, 24 ex

FIELD: varnish-and-paint industry.

SUBSTANCE: invention proposes non-fluorescent typewriter ink composition, which includes non-fluorescent pigment preliminarily dispersed in alkyd resin and organic solvent with high boiling temperature. Composition may further contain resins, plasticizers, substance preventing formation of surface film, and lubricants.

EFFECT: enabled presence of a wide spectrum on insoluble dyes, which are dispersed in resin.

44 cl, 3 tbl, 2 ex

The invention relates to compositions for writing nodes measuring recording techniques to record the course of the controlled processes, and can be used in seismology, medical diagnostics and other areas of technology for the registration of workers and emergency modes

The invention relates to the field of ink, in particular ink for ink-jet printing devices, and also relates to a method of obtaining pigments for such ink

The invention relates to a drawing graphic means, in particular, compositions intended for drawing, drawing of inscriptions and drawings on paper and synthetic media, and for creating images on diazotype domestic and foreign materials used for copying in topografogeodetic and map production

The invention relates to a compound for dispersing particulate solids in the aquatic environment, the method thereof and compositions containing the specified connection and a particulate solid phase, including paint and ink

The invention relates to a dispersant for dispersing particulate solids in the aquatic environment, which is a phosphate ester, polyalkylene ether block copolymer of the formula RO(C2H4O)m(C3H6O)n-H, where R is a C1-4-alkyl, m and n are independently each can take values from 2 to 60, its use in the composition of water-based paints and printing inks, as well as to a method for obtaining the reaction of polyalkylene ether block copolymer with a phosphating agent

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: 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: 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: 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: 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

The invention relates to the field of compositions for coating, namely fluorescent stamp mastics for the application of texts or images on solid media, preferably pulp and paper, and can be used when drawing text and/or images special stamp mastic, preferably in the form of seals, for the protection of paper-based information from a fake
The invention relates to the field of compositions for coating, namely fluorescent stamp mastics for the application of texts or images on solid media, preferably pulp and paper, and can be used when drawing text and/or images special stamp mastic is preferably in the form of seals for the protection of paper-based information from a fake

Printing ink // 2179565
The invention relates to the printing industry, namely, printing ink for screen printing, used for preparation of luminous scales, indicators, signs, used in low light conditions, for example, during the evacuation of people from the building during a fire or any other emergency in the dark
The invention relates to the development of counterfeit-protected inks for inkjet printing methods that can be used to make important business documents

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

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