Adhesives with latent reactivity for identification documents

FIELD: printing.

SUBSTANCE: group of inventions relates to production of identification documents, made of thermoplastic material and a method of their manufacture. The identification document comprises the layers A), B) and C), at that the layer A) is thermoplastic, the layer B) is made of a storage-stable adhesive with latent reactivity, and the layer C) is thermoplastic, at that the adhesive comprises an aqueous dispersion comprising a diisocyanate or polyisocyanate with a melting point or, respectively, softening point above +30°C and the polymer reactive towards isocyanates, which is polyurethane composed of crystallised polymer chains which, according to the study results, by thermomechanic method at temperatures below +110°C decrystalise partially or completely.

EFFECT: exclusion of layers stratifying.

11 cl, 8 ex, 8 tbl

 

The present invention relates to an identification document comprising the layers A), b) and C)and the layer (a) is a thermoplastic layer) made of the stability during storage of the adhesive with latent reactivity and the layer (C) is a thermoplastic.

In the manufacture of identification documents based on polycarbonate issue with the destruction complex (e) elements and diffractive structures (in particular, holograms) in the laminating process, if they are not equipped with a flexible packaging. Such problems until recently avoided through the creation of a directly around the subject lamination element filled cavities or through the use of thermoelasticity/thermoplastic buffer layers consisting, for example, of thermoplastic polyurethane. Such "soft" layer is designed to reduce mechanical stresses in the laminating process. The material of such layer on the chemical nature different from the material from which is comprised the identification document, that is, in principle, it is an alien body that is a weak point of identification documents with a high degree of protection against forgery.

With the introduction of identification documents polycarbonate based electronic components, primarily the integral is s circuits (chips), if too thin semiconductor structures arises the problem of premature destruction of the element in the laminating process. In the case of known manufacturing smart cards polycarbonate, carried out by lamination of the individual film layers, it comes to the fact that the polycarbonate film is directly above the chip. In accordance with the industrial technology pre-prepared components such cards pressed into the corresponding "quasimonopoly" block under the simultaneous effect of temperature and pressure. Since the polycarbonate due to the characteristic of the heat transfer coefficient does not immediately softened, directly on the chip operates high blood pressure, which in most cases determines its mechanical destruction.

In the case of supply of electronic elements self-adhesive film, they can be bonded with the card. However, the respective adhesive layers usually are the weak point of the structure of such maps: water vapor and the air is easier to diffuse inside her over the edge, which may lead to subsequent delamination of the map. The delamination of the card, and, consequently, its unfit for further use can be attributed to other influences of the external environment, primarily variable temperature is dependent.

Adhesives with latently reactivity known, for example, from European patent application EP-A-0922720. Such adhesives in principle contain two solid phases, such as a mixture of two crystalline substances at room temperature or normal ambient conditions do not interact with each other. These substances enter into chemical interaction with each other only when activated by, for example, by heating.

In accordance with German patent DE 3112054, DE 3228723 and DE 3228724 carry out surface deactivation powdered finely dispersed solid polyisocyanates with a particle diameter of 150 μm. Surface treatment provides a constant content of isocyanate groups and the reactivity of these polyisocyanates, and stable one-component system formed in water or water-containing solvents.

In accordance with German patent DE 3228724 and DE 3230757 surface deactivated powder diisocyanate combined with polyols and water dispersions containing the functional group of the polymer, having a stable when stored reactive pasta. By heating such water-containing paste to 140°C., i.e. to a temperature higher than the temperature of the entry MDI in response, going on the t followed by the binding interaction of both components with the formation of the slightly foamed elastic coating.

Method of preparation of stable dispersions of finely dispersed isocyanate with deactivated surface is described in German patent DE 3517333. The resulting stable dispersion suitable for use as cross-linking agents.

On the application of aqueous dispersions of surface-deactivated finely dispersed solid polyisocyanates as crosslinking agents in pigment pastes and dye solutions for printing on textile is reported in the German patent DE 3529530. Upon completion of the process of applying pigment pastes and dyeing solutions they are fixed on the fabric by means of hot air or steam.

The disadvantage described in the cited publications systems is the lack of a separate implementation of the business operations of their application and curing, respectively stitching that for economic and logistical reasons, obviously, it is desirable for many applications of such systems.

Separate implementation of these operations, for example, would be applied to the substrate layer or powder stable during storage of the adhesive with latent reactivity in a place where there is suitable equipment, to store the obtained semi-finished product for a specified period of time, and then transport it to the place of processing in other intermediate products which you or a final product.

Stable during storage masses or layers of latent reactivity described in international application WO 93/25599. Such masses or layers consist of reactive towards isocyanate polymers with a melting point above 40°C and surface-deactivated polyisocyanates. With the aim of producing a mixture of these components is melted at temperatures that are much higher than the softening temperature of the polymer. This technology in addition to the high cost of energy is a significant cost of equipment for the manufacture and application of these masses. In addition, to ensure the stability and the possibility of processing in such a system can be used only superficially deactivated polyisocyanates, temperature stitching which exceeds 80°C. Along with this object cited application is targeted and controlled inhomogeneous mixing of the components. However, it requires the implementation of appropriate expensive labour operations.

Based on the foregoing, the present invention was based on the task to propose a new identification documents with improved protection against forgery, and the method of their manufacture. In the first place was to reduce the tendency of identification documents to delamination

According to the invention this task is solved through an identification document, comprising the layers A), b) and C)and the layer (a) is a thermoplastic layer) made of the stability during storage of the adhesive with latent reactivity and the layer (C) is a thermoplastic.

In accordance with the present invention under identification document imply having the flat shape of the multilayer document, with protective signs, such as chips, photographs, biometric data, and the like. Such protective signs should be visually distinct, or at least read from the external side of the identification document. Identification document usually has a size intermediate between the size of a Bank card and passport. Identification document may be part of a multi-part document, for example, it may be composed of a polymeric material identification document as part of the passport, including the paper or cardboard parts.

The present invention in another embodiment, implementation refers to the identification document, wherein the adhesive consists of an aqueous dispersion containing a diisocyanate or polyisocyanate with a melting point, respectively RASMAG the tion, above 30°C, and reactive towards isocyanate polymer.

The present invention in another embodiment, implementation refers to the identification document, wherein the adhesive consists of an aqueous dispersion, the viscosity of which is at least 2000 mPas.

The present invention in another embodiment, implementation refers to the identification document, wherein the reactive towards isocyanate polymer is a polyurethane, comprising crystallizing polymer chains, which according to the research thermomechanical method at temperatures below +110°C, preferably below +90°C, partially or fully decrystallization. Thermo-mechanical method is used to control the crystallinity, as specified in ISO 11359, part 3, "temperature Determination of penetratie".

The present invention in another embodiment, implementation refers to the identification document, wherein the diisocyanate or polyisocyanate is selected from the group comprising a product of the dimerization, trimerization product and urea derivatives diisocyanate, respectively isophorondiisocyanate.

The present invention in another embodiment, implementation refers to the identification document, wherein the adhesive with which the Association is made in the following way: at first be used for bonding the substrate to cause a variance under paragraph 1 of the claims, which is then dried, the dried adhesive layer is subjected to testing by briefly heating, the duration of which is preferably less than 5 minutes, to a temperature greater than 65°C, preferably in the range from 80 to 110°C, and in decrystallization able to connect with the second subject to the bonding substrate.

In accordance with the present invention under thermoplastic mean a thermoplastic polymer, such as polycarbonate, polymethylmethacrylate, polystyrene or copolymer of styrene, for example, preferably transparent polystyrene or copolymer of styrene with Acrylonitrile, transparent thermoplastic polyurethanes, and polyolefins, for example, preferably transparent grades of polypropylene or polyolefins based on cyclic olefins (e.g., TOPAS®company Topas Advanced Polymers, polycondensation products or copolycondensation terephthalic acid, for example, preferably polyethylene terephthalate, spriterenderer or modified glycol terephthalate, polietilenglikolsuktsinata or transparent polysulfones.

The present invention in another embodiment, implementation refers to the identification document, wherein thermoplastic polymer layer (A) and layer (C) independently from each other selected from the group including polycarbonate, polycondensation products or copolycondensation terephthalic acid, for example, preferably polyethylene terephthalate, spriterenderer or modified glycol terephthalate.

Thus, laminates, used primarily for the manufacture of identification documents with a high degree of protection against forgery and including at least one stable during storage layer with latent reactivity, can be manufactured through the use of mostly water dispersion containing at least one surface-deactivated the polyisocyanate and at least one reactive towards isocyanates, dispersed or dissolved polymer.

The object of the present invention is also a method of manufacturing a layered materials, at least one stable during storage and having latent reactivity layer, in accordance with which:

A.) predominantly aqueous dispersion or solution of at least one reactive towards isocyanate polymer is mixed

b.) at least one predominantly suspended in water, surface-deactivated solid, finely dispersed polyisocyanate,

C) the mixture when neo is needed to be applied on the substrate layer of specified thickness, and

d.) present in a mixture of water are removed at a temperature below the entry of isocyanate in the reaction,

in the result that are mainly dry and waterless layers or masses, which at temperatures below the temperature of the MDI interaction with the polymer are stable during storage and latent reactivity.

Unexpectedly, it was found that the removal of water and drying the above mixture can be made:

i) in the temperature interval from room temperature to the softening temperature of the polymer with functional groups, or

ii) at a temperature exceeding the softening temperature of the polymer with functional groups,

provided that none of these cases, the temperature does not exceed the temperature of the joining surface Deaktivierung MDI reaction. Regardless, in accordance with any of paragraphs (i) or (ii) perform drying, surface-deactivated solid, finely dispersed polyisocyanates after drying are present in essentially anhydrous polymer in intact and unreacted state, respectively distributed in anhydrous layer or powder and implemented in their state. Dispersion, suspension or solution of the polymer and the suspended surface-deactivated isocyanate moving in the wrong is on-going phase unstitched polymer, in which suspended unreacted surface deactivated, fine isocyanates.

In case (i) are formed waterless dry film or waterless dry powder with latent reactivity, suitable for storage at room or slightly higher temperature. In such case, provide the ability of surface-deactivated isocyanate to interact with the functional groups of the polymer.

In case (ii) after evaporation of the water formed by the fused system. An example of such technology is the manufacture of the laminated material by bonding films. When this surface-deactivated isocyanate also remain unchanged and retain their reactivity. The bonding in the first place due to thermoplastic properties of the polymer.

In both cases, the binding system, in which it becomes infusible and insoluble, occurs only at temperatures exceeding the temperature of the joining surface Deaktivierung isocyanate in the reaction. Crosslinking occurs after a specified period of time.

In some cases, to initiate the crosslinking reaction is sufficient to briefly exceed the temperature of the joining surface Deaktivierung of the cyanate reaction. The temperature enters the deactivated polyisocyanates in the reaction or increase their viscosity should be in the range from 30 to 180°C., preferably from 40 to 150°C.

The temperature increase of the viscosity or the entry deactivated polyisocyanates in the reaction means the temperature at which the surface-deactivated layer of isocyanate dissolved in the polymer or destroyed otherwise. When this occurs, the release of MDI and its dissolution in the polymer. Final curing occurs due to diffusion of MDI and its interaction with the functional groups of the polymer, followed by increased viscosity and crosslinking. Depending on the type of surface Deaktivierung MDI temperature increasing the viscosity or the entry of isocyanate in the reaction is above or below the softening temperature of the polymer.

The stability of unreacted system, as well as temperature and reaction are determined by the type MDI, type, and quantity of surface stabilizer, the solubility parameters of the polymer with functional groups, as well as catalysts, plasticizers and other auxiliary materials. These products are discussed in detail in the references cited at the beginning of the present description publications.

In addition, what bhakta of the present invention is the processing of the substrate, implemented after applying a layer or powder. We are talking about the final processing of the substrate, for example, by punching, cutting, bending, jointing, laminating, or other methods. At this unexpected circumstance was also proposed processing in the invention of film or powder in a plastic condition. After days or even months layer or the powder can be heated to a temperature exceeding the softening temperature of the polymer, without interaction of the functional groups of the last surface with empty isocyanates. Recycling in the plastic state of the layer or powder can be made after repeated heating and cooling.

In accordance with a preferred embodiment of the invention, films or powders are having latent reactivity and stability during storage of the adhesive systems.

Drawing on electronic items such self-adhesive film with latent reactivity enough to hold them with the relevant identification documents. With the invention of the adhesive layers are not the weak point in the structure of the past, because the water vapor and air can diffuse through the edge and cause delamination of the documents. PR is this attached to the document electronic element cannot be separated from it without failure.

For carrying out the invention method as polyisocyanates you can use any of the diisocyanates, polyisocyanates or mixtures thereof, provided that the temperature of their melting point greater than 40°C and that they can be well-known methods translated in powder form with a particle size less than 200 microns. Suitable are aliphatic, cycloaliphatic, heterocyclic or aromatic polyisocyanates. Examples of such compounds are difenilmetana-4,4'-diisocyanate, naphthalene-1,5-diisocyanate, 3,3'-dimethylbiphenyl-4,4'-diisocyanate, dimeric 1-methyl-2,4-delete the entry, 3,3'-diisocyanato-4,4'-dimethyl-N,N'-diphenylacetone, the product of the merger of two moles of 1-methyl-2,4-phenylenediamine to one pray 1,2-ethanediol, 1,4-butanediol, 1,4-cyclohexanedimethanol or ethanolamine, and isocyanurate isophorondiisocyanate.

The above mentioned addition products allow you to achieve the benefits in case of their use for carrying out the invention method not only in the form of aqueous dispersions. The addition products of 1-methyl-2,4-phenylene-diisocyanate to 1,4-butanediol or 1,2-ethanediol also have very favorable properties when used in solid and liquid systems, whether or not containing solvent. Such systems are primarily distinguished low is the temperature of curing, accordingly stitching, which corresponds to the temperature region below 90°C. In this regard, highly preferred is the use of such a mixture mainly water or polyol as one basis for use on temperature-sensitive substrates and bonding.

Response surface stabilization can be realized by the following methods.

By dispersing powder of isocyanate in the solution of deactivator.

By introducing a molten low-melting MDI in solution deactivator in nerastvorim the polyisocyanate liquid dispersant.

By adding deactivator or his solution to the dispersion of solid fine isocyanates.

The concentration of deactivator should be from 0.1 to 25% EQ., preferably from 0.5 to 8% EQ. in terms of the total number of isocyanate groups.

For implemented according to the invention using powder polyisocyanates it is often necessary to set the size of the particles in the range from 0.5 to 20 μm, for which the polyisocyanates after synthesis is subjected to fine dispersion or grinding in the wet state. For this purpose, suitable dissolvers, dispersal device type rotor-stator, ball mills with a stirrer, a bead mill, a mill for grinding sand, ball grounding the Itza and kraskoterke, operating at temperatures below 40°C. depending on the type of MDI and its use grinding Deaktivierung MDI perform in the presence of deactivator, directionspanel the dispersant or water with subsequent deactivation. Ground and surface stabilized polyisocyanate you can also select from the resulting grinding dispersion and subjected to drying.

For the regulation of surface deactivate and the crosslinking reaction can also use catalysts. Preferred are catalysts resistant to hydrolysis in aqueous solution or dispersion and, therefore, able to accelerate subsequent thermally activated reaction. Examples of suitable urethane catalysts synthesis are organic compounds of tin, iron, lead, cobalt, bismuth, antimony, or zinc, and mixtures thereof. Due to the increased resistance to hydrolysis preferred catalysts are allylmercaptan connection dibutylamine.

For special purposes or in combination with catalysts based on metals it is possible to use tertiary amines, such as dimethylbenzylamine or databaseconnect, as well as non-volatile catalysts foaming of polyurethanes based on tertiary amines, but it may mean the ing to the loss of catalytic activity due to the interaction with airborne carbon dioxide.

The concentration of catalyst is in the range from 0.001 to 3%, preferably from 0.01 to 1% in terms of the reactive system.

Water dispersion to offer in the invention compositions contain (preferably in the form of reactive towards isocyanates dispersed polymer) polyurethane, respectively polycarbamide dispersion with crystalline plasticizer segments complicated polyester. Especially preferred are dispersions of reactive towards isocyanate polyurethanes with crystal, respectively semi-crystalline polymer chains that are at least partially loses defined thermomechanical method crystallinity in the temperature interval from 50 to 120°C.

If necessary, you can also enter dispersions of polyacrylates, however, it is preferable to use polyurethane, respectively polycarbamide dispersions with crystal plasticizing segments complicated polyester.

As proposed in the invention of reagents that interact with polyisocyanates, use water-soluble or water-dispersible emulsion or dispersion polymers with functional groups which are reactive towards isocyanates. On the one polymers get known from the prior art methods of polymerization refinancing monomers in solution, emulsion or suspension. Film-forming polymers contain from 0.2 to 15%, preferably from 1 to 8% of monomer units with reactive towards isocyanate groups, such as hydroxyl group, amino group, carboxyl group or urea group.

Examples of these monomers with functional groups are allyl alcohol, hydroxyethylacrylate, hydroxypropylmethacrylate, hydroxyethylmethacrylate, hydroxypropylmethacrylate, potentialtheorie, ethoxylated or propoxycarbonyl acrylates or methacrylates, N-methylolacrylamide, tert-butylmethacrylate, acrylic acid, methacrylic acid, maleic acid and esters of maleic acid. As co monomer can also be used glycidylmethacrylate or allylglycidyl ether. The latter contain an epoxy group, which is implemented by additional stages of interaction with amines or aminoalcohols, for example, ethylamine, ethylhexylamine, isononylphenol, aniline, toluidine, xylidine, benzylamine, ethanolamine, 3-amino-1-propanol, 1-amino-2-propane, 5-amino-1-pentanol, 6-amino-1-hexanol or 2-(2-aminoethoxy)ethanol can be converted into the secondary amino group.

The specified transformation increases the reactivity of the functional groups of the polymer with respect to sociality groups, reducing the likelihood of adverse reactions with water.

Suitable are water-soluble binder with a hydroxyl functional groups, such as polyvinyl alcohol, partially saponified polyvinyl acetate, hydroxyethyl cellulose, hydroxypropylcellulose, and water-dispersible polyesters and culpability with hydroxyl functional groups of the polyurethane dispersion and dispersion polyamidoamine containing carboxyl groups, hydroxyl groups and primary or secondary amino group.

In addition, you can use get in a colloidal mill aqueous colloidal dispersions or colloidal solutions of thermoplastic polymers with reactive towards isocyanate groups. An example of such products are high molecular weight solid epoxy resin, a copolymer of ethylene with vinyl alcohol and a copolymer of ethylene and acrylic acid with a particle size in the range from 1 to 100 nm.

By mixing or dispersing in the resulting viscous paste or low viscosity mixture, you can enter additional inert or functional additives. Such functional additives include powdered or liquid, low-molecular or high-molecular compounds with functional hydroxyl or amino groups, which is the contrasted to interact with the solid polyisocyanates at temperatures above the temperature of the last entry in the response. Such functional additives should be used in the appropriate stoichiometric number. Under low-molecular functional additives include compounds with a molecular weight in the range from 40 to 500 g/mol, while the molecular weight of high molecular weight functional additives corresponds to the interval from 500 to 10000 g/mol. The concern of low-molecular or high-molecular liquid polyols and/or polyamines, and solid polyfunctional polyols and/or aromatic polyamines. Examples of suitable functional additives are triethanolamine, butanediol, trimethylolpropane, ethoxylated bisphenol-a, polypropylenglycol with ethoxylated terminal groups, 3,5-diethyltoluene-2,4-diamine, 3,5-diethyltoluene-2-6-diamine, polytetramethylene-di(p-aminobenzoate), trihydroxide-isocyanurate, bishydroxyethyl ether of hydroquinone, pentaerythritol, 4,4'-diaminobenzanilide and 4,4'-Methylenebis(2,6-diethylaniline).

To inert additives include, for example, wetting agents, organic or inorganic thickeners, plasticizers, fillers, polymer powders, pigments, dyes, light stabilizers, antioxidants, anti-corrosion, fire-proof means, the pore-formers, resins to improve adhesion, organovo clonally silanes, staple fiber, and optionally minor quantities of inert solvents.

The advantages of the present invention are the ability to separate the operation of applying a water dispersion and reaction of crosslinking, i.e. the final curing. Because of this, for example, in a certain place can be applied to wood, glass or other substrates or base adhesive film, and then store the corresponding pre-manufactured semi-finished products and/or send them to another location for curing to the final product.

Another advantage of the invention method and application of relevant products is the use of water as a dispersion medium. Preparation of aqueous dispersions requires little power consumption. They contain the minimum amount of organic solvent, which is a prerequisite for favorable impact on the environment processing.

The original aqueous polymer dispersion allows to achieve additional advantages, which is the ability to smooth the introduction of the mixture is also surface-deactivated polyisocyanates, melting point which is in the range from 40 to 150°C. the temperature of the stitching can be from to 90°C. Due to the low temperature crosslinking given the opportunity bonding of such one-component system under the action of heat is also temperature sensitive substrates.

Made from an aqueous suspension, dispersion or solution layer or the powder can be stored for months. However, the length of storage at room or slightly higher temperature may vary depending on the ability of a solid film dissolving the polyisocyanate. Storage duration proposed in the invention system in anhydrous and unstitched condition, at least three times, usually more than 10 times higher compared to a similar mixture containing the same polyisocyanates, however, are not subjected to surface deactivation. Storage proposed in the invention of layers or powders at +2°C, they retain their stability and suitability for implemented according to the invention, the processing for at least six months, whereas in the case of storage at room temperature for a period of preservation of source properties is at least one month. The term "latent reactivity" is used to denote a condition predominantly anhydrous layer or powder in which the surface-deactivated the polyisocyanate and reactive in respect of which the isocyanate polymer are mainly in unstitched form.

Required for thermoplastic processing, as well as for stitching the heat can be summed preferably in the form of heat convection or heat radiation. Storable aqueous suspension, dispersion or solution of surface fine deactivated polyisocyanates and dispersed or water-soluble polymers containing reactive towards isocyanate groups, can be applied to the surface of the glue or supplied adhesive substrate primarily by smearing brush, spraying, splashing through squeegee, filling, watering, dipping, extruding, by the roll or by the method of printing.

Substrates suitable for making proposed in the invention of layered materials are thermoplastic polymers, such as polycarbonates or copolycarbonates based diphenols, polyacrylates, copolymers of acrylates, polymethacrylates or copolymers of methacrylates, for example, preferably polymethylmethacrylate, polymers or copolymers of styrene, for example, preferably transparent polystyrene or copolymer of styrene with Acrylonitrile, transparent thermoplastic polyurethanes, polyolefins, for example, preferably transparent grades of polypropylene or polyolefins based on cyclic olefins (e.g., TOPAS® company Topas Advanced Polymers, polycondensation products or copolycondensation terephthalic acid, for example, preferably polyethylene terephthalate, spriterenderer modified with glycol terephthalate or polietilenglikolsuktsinata and transparent polysulfones.

The bonding of the substrates can be accomplished in one of the following methods.

1. The bonding pressing, providing for the connection of the mating surfaces at room temperature, heated to a temperature higher than the softening temperature of the polymer, but lower than reaction temperature, and then cooled to room temperature. Receive a composite material with latent reactivity. This material can be subjected to further processing and molding, including, if the polymer is plastic, respectively thermoplastic condition. The final cross-linked state provide heated to a temperature higher than the temperature increase of the viscosity or the temperature of the reaction.

2. The bonding pressing, providing for the connection of the mating surfaces at room temperature, heated to a temperature higher than the softening temperature of the polymer, forming a homogeneous adhesive film which wets the mating surface is knosti and stick to it, heated to a temperature higher than the temperature increase of the viscosity or the temperature of the reaction, and the final stitching.

3. Translation of the mating surfaces in thermoplastic state, implemented by heating to a temperature exceeding the softening temperature of the polymer, the connection with the second substrate and the pressing is carried out by heating to a temperature exceeding the temperature increase of the viscosity or the temperature of the reaction. If necessary, in a thermoplastic state of a system can be subjected to further processing.

In accordance with a second embodiment of the method is stable when stored water dispersion of surface-deactivated finely dispersed polyisocyanates and dispersed or water-soluble polymers with reactive towards isocyanate groups shape the adhesive film, adhesive tape, adhesive non-woven material or adhesive fabric with latent reactivity, which may be double-sided adhesion. With the aim of producing systems without substrate, such as an adhesive film or adhesive tapes offered in the invention dispersion is applied on neuzgesinama substrate in the form of a tape or on the separating paper and at room temperature or at temperatures below the softening temperature poly the EPA evaporated water. After cooling, the adhesive film can be separated from the substrate, without which it can be stored until use. In another embodiment, the adhesive film can be stored together with a paper backing.

In the case of adhesive non-woven material or adhesive fabric reactive dispersion is applied by spraying, sprinkling, by squeegee, spray, dipping, add on, by the roll or by the method of printing, at room temperature or at temperatures below the softening temperature of the polymer evaporated water with or impregnated with an adhesive layer with a latent reactive adhesive non-woven material or adhesive fabric store to use.

Adhesive tapes, adhesive tapes, adhesive non-woven material or adhesive fabric used as located between the substrates, the adhesive layer. In addition, adhesive film, adhesive non-woven material or adhesive fabric can be applied to the surface which is in plastic condition of the substrate or sintering with him. Such laminated material can be stored at room temperature before the final bonding surface of the second substrate.

In accordance with a third embodiment of the method is stable when stored water dispersion of surface-deactivated finely dispersed polyisocyanates and dispergirovany the or water-soluble polymers with reactive towards isocyanate groups shape having latent reactivity of the powder. Such powders can be used as adhesives with latent reactivity or for the manufacture of coatings, such as powder lacquer coating.

For the manufacture of powders of the invention dispersions of the latter can be sprayed in the spray dryer. The temperature of feed in the lower part of the spray drier air should be below the softening temperature of the polymer and the temperature of the joining surface is blocked MDI in response.

In another embodiment of the proposed invention in the dispersion can be sprayed or applied with a method of printing on neuzgesinama surface rotating in a continuous loop tape. After the water evaporates dry particles are separated from the specified tape, if necessary, sieved and sorted, and stored until use.

Powders with latent reactivity can be produced by crushing films or tapes without substrate, which optionally implement at low temperatures. Such powders are used as thermally activated stitched powdered adhesives or as powder coatings. Appropriate devices and application methods known in the art, and technology.

Pre-manufactured proposed in the invention by way of layers with latents the Oh reactivity is preferably used as susceptible to temperature effects of adhesive joints for flexible or rigid substrates, for example, such as metals, polymeric materials, glass, wood, wood composite materials, cardboard, film materials, synthetic products flat shape or textile materials.

Manufactured according to the invention the reactive powders for coatings can be processed also by the methods used for applying powder coating. Stitching should be done in dependent type MDI low temperature, thus avoiding thermal damage temperature sensitive substrates, such as polymeric materials, textiles and wood. Proposed in the invention method also allows to perform only the sintering of powders for coatings on the surface of the substrate or melting, ensuring the formation of a continuous layer. In this case, complete crosslinking is carried out at the subsequent heat treatment, if necessary after addition of the realized operation of mechanical or thermal processing.

Examples

A) Used trade products

Dispercoll®U 53

Polyurethane dispersion from Bayer MaterialScience AG 51368 Leverkusen) with a solids content of about 40% of the mass. (reactive towards isocyanates unbranched polyurethane). After drying the dispersion and cooling the film to 23 which the polymer is in the crystalline state. According to the study of film thermomechanical method at temperatures below +65°C it basically decrystallization.

Desmodur®DN

Does not contain solvents hydrophilic modified crosslinking isocyanate-based trimer of hexamethylenediisocyanate. The content of NCO-groups of about 20%, viscosity at 23°C to about 1200 mPas.

Dispercoll®BLXP 2514

The suspension surface Deaktivierung toluylenediisocyanate-uretdione (toluylene diisocyanate dimer) in water with a solids content of about 40%.

Dispercoll®U VP KA 8755

Polyurethane dispersion from Bayer MaterialScience AG 51368 Leverkusen) with a solids content of about 40% of the mass.(reactive towards isocyanates unbranched polyurethane). After drying the dispersion and film cooling to 23°C. the polymer is in the crystalline state. According to the study of film thermomechanical method at temperatures below +65°C it basically decrystallization.

Borchi®Gel L 75 N

Non-ionic liquid aliphatic thickener based on polyurethane with a viscosity at 23°C less than 9000 MPa·s and a content of non-volatile components of about 50 wt%.

Aqua Press®ME

Trading milky-white dispersion of firm Pröll.

Borchi®Gel ALA

An aqueous solution of anionic thickener on acrylate basis with Vascos the d at 20°C from 25,000 to 60,000 MPa·s (o'hare Chicago MARRIOTT, LVT, hydrometer IV, 6 rpm) and the content of non-volatile components about 10% of the mass.

Dispercoll KRAU 2756 K-1 (laboratory product)

Polyurethane dispersion from Bayer MaterialScience AG 51368 Leverkusen) with a solids content of about 45% of the mass. (reactive towards isocyanates linear polyurethane).

After drying the dispersion and film cooling to 23°C. the polymer is in a partially crystalline state. According to the study of film thermomechanical method at temperatures below +65°C it basically decrystallization.

Study of thermo-mechanical method was performed according to ISO 11359, part 3, "temperature Determination of penetration".

C) storage Options

Option a

Application of the dispersion at room temperature, the maximum removal of water by evaporation at room temperature (measured on the film), the laminating adhesive surfaces to a maximum of 3 hours at 90°or 120 ° C (object temperature), followed by crosslinking reaction. Cooling and storage of material within 24 hours under normal conditions.

Option

Application of the dispersion at room temperature, the maximum removal of water by evaporation at room temperature (measured on the film), storage under normal conditions for one day, followed by laminating at 90 or 120°C (object temperature) followed by crosslinking reaction. Cooling and storage of material within 24 hours under normal conditions.

Option

Application of the dispersion at room temperature, the maximum removal of water by evaporation at room temperature (measured on the film), storage under normal conditions for at least 7 days, followed by laminating at 90 or 120°C (object temperature), followed by crosslinking reaction. Cooling and storage of material within 24 hours under normal conditions.

Option D

Application of the dispersion at room temperature, the maximum removal of water by evaporation at room temperature. Excerpt provided with adhesive surfaces on the air for 21 days. Subsequent lamination at 90 or 120°C (object temperature), followed by crosslinking reaction. Cooling and storage of material within 24 hours under normal conditions.

C) Preparation of specimens and test methods

The resistance to delamination of the two glued films was determined according to DIN 53357.

The sample size of 200×50×0.15 mm3produced by bonding two films overlap by pressing. Leave free the plots of films with a length of about 40 mm was secured in the clamps of the machine for tensile test. The bonding area was about 160 x 50 mm2. Resistance to delamination was measured at 120°C.

Below on the other test conditions and their deviation from the standard.

D) Application and testing of dispersions of reactive glue

Used dispersion glue

General method of preparation of dispersions of adhesive

First, by adding a thickener to increase the viscosity of the dispersion Dispercoll U.

Mass
Dispercoll®U 53100
Borchigel®ALA2

Then under stirring to 100 mass Dispercoll U 53 add from 5 to 10 mass Deaktivierung MDI, receiving water suspension of the following composition.

Through dissolver carried out the preparation of the reactive dispersion adhesive with the following the following polyisocyanates:

Example 1 (comparative, not according to invention)Mass
Dispercoll®U 53100
Borchigel®ALA2

Example 2 (according to the invention)Mass
Dispercoll® U 53100
Borchigell®ALA2
Desmodur®DN5

Example 3 (according to the invention)Mass
Dispercoll®U 53100
Borchigel®ALA2
Dispercoll®BL XP 251410

Example 4Mass
Dispercoll®U 53100
Borchigell®ALA2
The trimer of isophorondiisocyanate (3% EQ. the amino groups of the product of Jeffamine T-403)20

Example 5 (comparative, not according to invention)

Commercial aqueous one-component adhesion promoter Aqua Press®(firm Pröll KG, Weisenburg).

Example 6

The adhesive mixture from examples 1-5 by spiral doctor blade inflicted on structured on both sides special polycarbonate film for identification is ocuments Makrofol ®ID 6-2 Bayer Material-Science AG with a thickness of 150 μm (6-I page: roughness R3z about 9 μm; 2-I page: R3z about 4 microns) layer of a thickness of 100 μm (wet). The film was dried under normal conditions.

Each of the supplied adhesive films once implemented in accordance with the options a-C storage was eliminirovali film Makrofol®ID 6-2 thickness of 150 μm without the adhesive layer, and then performing tests of the material as specified in section C). Lamination (bonding pressing) was performed at 90 and 120°C With a compressing force of 2 kgf/cm2.

Then determined the mechanical strength of the bonding depending on the storage option And-S (storage duration) and temperature lamination.

ExampleStorage optionTemperature laminationThe average resistance to delamination, N/cm
Example 1In accordance with the inventionAnd901,03
Example 1In accordance with the inventionIn90 0,46
Example 1In accordance with the invention901,38
Example 1In accordance with the inventionAnd1200,80
Example 1In accordance with the inventionIn1200,88
Example 1In accordance with the invention1200,66
Example 2According to the inventionAnd908,67
Example 2According to the inventionIn906,54

ExampleStorage optionTemperature laminationCf is dnee resistance to delamination, N/cm
Example 2According to the invention902,64
Example 2According to the inventionAnd1204,95
Example 2According to the inventionIn1203,21
Example 2According to the invention120of 2.51
Example 3According to the inventionAnd9011,57
Example 3According to the inventionIn9013,24
Example 3According to the invention9013,42
Example 3According to the invention And12010,48
Example 3According to the inventionIn12017,90
Example 3According to the invention12014,77
Example 4According to the inventionAnd903,52
Example 4According to the inventionIn90of 5.84
Example 4According to the invention905,99
Example 4According to the inventionAnd1203,28
Example 4According to the inventionIn1204.26 deaths
Example 4 According to the invention1202,59
Example 5In accordance with the inventionA*901,54
Example 5In accordance with the inventionA*1200,93
* Refusal of further storage in the absence of primary strength

The determination of the stability of the films with the adhesive during storage continued for the best of the above systems (from example 3).

Example 7
Mass
Dispercoll®VP KA 8755700
Borchigel®L 75 N7
Dispercoll®BL XP 251470

Example 8
Mass
KRAU 2756 K-1700
Borchigel®L 75 N7
Dispercoll®BL XP 251470

The adhesive mixtures of examples 7-8 through a spiral doctor blade inflicted on smooth on both sides special polycarbonate film for identification documents Makrofol®ID 1-1 Bayer MaterialScience AG with a thickness of 250 μm layer thickness of 50 μm (wet). The film was dried in a vacuum drying Cabinet at 50°C.

Each of the supplied adhesive films once implemented in accordance with options a and D storage was eliminirovali film Makrofol®ID 1-1 thickness of 250 μm without the adhesive layer, and then performed tests, as specified in section C). Lamination (bonding pressing) was performed at 120 and 135°With the compressing force of 2 kgf/cm2.

Then determined the mechanical strength of the bonding depending on the storage option a or D (storage duration) and temperature lamination.

ExampleStorage optionTemperature laminationThe average resistance to delamination, N/cm
Example 7According to the inventionAnd12031,30
Example 7According to the inventionD12071,04

ExampleStorage optionTemperature laminationThe average resistance to delamination, N/cm
Example 7According to the inventionAnd13573,59
Example 7According to the inventionD135140,41
Example 8According to the inventionAnd12055,82
Example 8 According to the inventionD12063,36
Example 8According to the inventionAnd13538,87
Example 8According to the inventionD13595,02

Laminated materials with the adhesive compositions of examples 7 and 8 even after storage for 21 days remain suitable for the formation of extremely durable adhesive bonding. At a temperature activated adhesive 135°To achieve higher bonding strength than 120°C.

After determination of the resistance of the glued film exfoliation their surfaces are so badly damaged that the possibility of their further use is excluded. Therefore, achieved the main use of identification documents with protection from forgery: elimination of thermal stratification films, glued by the glue and made according to the invention of examples, without damage.

1. Identification document comprising the layers A), b) and C)and the layer (a) is a thermoplastic layer) made of stabilin the th during storage of the adhesive with latent reactivity and the layer (C) is a thermoplastic, moreover, the adhesive consists of an aqueous dispersion containing a diisocyanate or polyisocyanate with a melting point or softening above +30°C, and reactive towards isocyanate polymer which is a polyurethane, comprising crystallizing polymer chains, which, according to the results of the study thermomechanical method, at temperatures below +110°C partially or fully decrystallized.

2. The identification document according to claim 1, characterized in that the reactive towards isocyanate polymer is a polyurethane, comprising crystallizing polymer chains, which, according to the results of the study thermomechanical method, at temperatures below +90°C partially or fully decrystallized.

3. The identification document according to claim 1, characterized in that the diisocyanate or polyisocyanate is selected from the group comprising a product of the dimerization, trimerization product and urea derivatives diisocyanate, or respectively isophorondiisocyanate.

4. The identification document according to claim 1, characterized in that thermoplastic layer a) and layer (C) independently from each other selected from the group including polycarbonate, polymethyl methacrylate, polystyrene, copolymers of styrene, for example, preferably transparent polystyrene or copolymer of styrene with Smoot is onitrile, transparent thermoplastic polyurethanes, polyolefins, for example, preferably transparent grades of polypropylene or polyolefins based on cyclic olefins, for example, TOPAS®company Topas Advanced Polymers, polycondensation products or copolycondensation terephthalic acid, for example, preferably polyethylene terephthalate, spriterenderer or modified glycol terephthalate, polietilenglikolsuktsinata and transparent polysulfones.

5. The identification document according to claim 1, characterized in that thermoplastic layer a) and layer (C) independently from each other selected from the group comprising polycarbonate and polycondensation products or copolycondensation terephthalic acid, for example, preferably polyethylene terephthalate, spriterenderer or modified glycol terephthalate.

6. The identification document according to claim 1, characterized in that it contains an electronic element.

7. The identification document according to claim 1, wherein the electronic element is an integrated circuit chip.

8. A method of manufacturing an identification document according to claim 1, comprising the following stages:
i) mixing a predominantly aqueous dispersion or solution containing(s)reactive toward isocyanates, the polymer is suspended in water with a surfactant, Deactive ofanim a diisocyanate or polyisocyanate, moreover, the diisocyanate or polyisocyanate has a melting point or softening above +30°C, and reactive towards isocyanate polymer is a polyurethane, comprising crystallizing polymer chains, which, according to the results of the study thermomechanical method, at temperatures below +110°C partially or fully decrystallized.
ii) application received at stage i) of the mixture on the layer (A),
iii) removing water from the obtained in stage i) mixture at a temperature below the entry of the diisocyanate or MDI in the reaction, followed by formation of a layer),
iv) applying a layer (C) formed in stage (iii) layer).

9. The method according to claim 8, characterized in that water is removed at a temperature below the entry of isocyanate in the reaction, and therefore formed, mainly dry and solid layers at temperatures below the temperature of the MDI interaction with polymers, possess latent reactivity.

10. The method according to claim 8, characterized in that between the layers (A) and (C) carry out adhesive bonding due to the fact that the dried stage iii) layer) is subjected to testing by briefly heating, the duration of which is preferably less than 5 minutes, to a temperature above +65°C, preferred is compulsory in the interval above +80°C but below +110°C, and, in decrystallization condition, combined with the layer (C).

11. The use of stable storage of the adhesive with latent reactivity as a layer of the identification document according to claim 1.



 

Same patents:

FIELD: transport.

SUBSTANCE: invention relates to method for covering light airplanes with polyester sheathing fabric, as well as to dispersive hot-gluing glue and its application for covering. For covering, polyester sheathing fabric with longitudinal shrinkage of 7% and transversal shrinkage of 5% at 160-180°C is used. In the process of covering light airplanes and/or their parts consisting of frame system, sheathing fabric in the area of its overhangs and frame parts is covered by dispersive hot-gluing glue and wrapped around longeron part of frame so that when connection between sheathing fabric and frame produced by glue is destructed the fabric could be held on frame carcass. Dispersive hot-gluing glue contains 80-88% of adhesive, 12-15% of hardener and 0.15-0.3% thickener, and the glue is polymerised at temperatures >40°C. The hardener contains 54-60% of solvent, 0.35-0.5% of naphthalensulfonic acid sodium salt-based stabiliser, 0.25-0.35% of propoxylated spirit-based emulsifier, 1.7-1.9% of polyetheramines-based hardener, 37-41% of polyisocyanate.

EFFECT: reliability and durability of light airplanes and/or their parts covering.

15 cl, 3 dwg

FIELD: chemistry.

SUBSTANCE: method of gluing involves processing the surfaces to be glued, applying the glue, pressing the components together and solidification of the glue. The glued surfaces are processed through external heating of the glued components until formation of a 0.5-2.0 mm deep coked layer. The glue joint works at temperature conditions at which material of one or both of the components undergoes thermal decomposition.

EFFECT: method improves adhesion characteristics of gluing carbon fibre reinforced plastic, as well as other composites with heat-resistant filler, increases reliability of operation, particularly glued heat shielding of sockets and reduces their weight.

1 tbl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of three-layer panels with cellular filler and may be used in aircraft and space engineering and machine building. Proposed method consists in placing three-layer panel with cellular filler assembly on process plate. Said assembly consists of outer coats, cellular filler and flue layer arranged between cellular filler and coats. Said assembly is locked relative to process plate. Temperature of melting and that flue layer polymerisation are gradually reached to remove glue volatile fractions. Process plate is heated together with said assembly in vertical position and rotated about axis perpendicular to force of gravity. Glue distribution over filler walls at joints with outer coats is adjusted by speed of angular rotation and heating conditions.

EFFECT: higher strength.

7 dwg

FIELD: chemistry.

SUBSTANCE: composition contains epoxy diane resin, oligoether acrylate, curing agent, initiator and solid filler. The filler is silica gel or aerosil. The initiator is in form of benzoin or dimethoxyphenyl acetophenone ethers. Oligoether acrylate is selected from a group of dimethacrylate ethers. The curing agent used is aliphatic or aromatic diamine and aliphatic or aromatic tertiary amine. The photocurable adhesive composition is obtained by mixing all components until their complete dissolution. The obtained mixture is put between glued surfaces and exposed to UV light for not less than 5 min. Further, thermal post-polymerisation is carried out at temperature not higher than 50°C, followed by cooling and holding. The invention is used in production of organic light-emitting diodes to prolong their service life.

EFFECT: good adhesion to glass, weather resistance, low chemical aggressiveness, high water resistance and crack resistance when pressed between glass plates.

8 cl, 3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: aqueous polyurethane dispersion composition contains polyurethane with carbodiimide and/or carboxyl groups, and polyurethane dispersion adhesive which contains polyurethane with carbodiimide and/or carboxyl groups. The polyurethanes are polyester-polyurethane elastomers. The aqueous polyurethane dispersion composition and polyurethane dispersion adhesive also contain at least one carbodiimide which contains at least one carbodiimide group. The aqueous polyurethane dispersion composition and polyurethane dispersion adhesive react with each other through a polyaddition reaction when heated to 50°C or higher. A polymeric film having an undercoating is obtained by depositing and drying the single-component aqueous polyurethane dispersion composition on a polymeric film. A composite is obtained by reacting the polymeric film having an undercoating with a substrate on which polyurethane dispersion adhesive is deposited and dried. The composite can be produced industrially and can be especially used in interior finishing, preferably of a component built into a transportation vehicle or can be used in the furniture industry.

EFFECT: high reliability of the composition.

5 cl, 3 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to mechanical fining of shaped articles by films. Adhesive is applied on shaped article surface and film is applied thereto. Shape article represents a window section. Fining of said section is carried out using polyurethane adhesive PVC film, polyacrylate or poly ether. Note here that said section is heated on applying adhesive on its surface, or adhesive is heated on its application on section surface to at least 40°C. Proposed method allows rejecting pre-processing of section to be fined.

EFFECT: minimised lamination of applied film.

7 cl, 1 ex

FIELD: machine building.

SUBSTANCE: invention refers to fixing devices. Here is disclosed the fixing device with a fixing element consisting of a fixing part with a flat external surface and with thermo-fusible glue melted for binding the fixing element with a holder and joined with the flat external surface of the fixing element and with the holder, thus forming a flat glue binding between them; also the fixing element is equipped with a seat opened in the direction of its flat external surface wherein a pressed part is inserted. A retaining fixture is made in the zone of the seat. According to the first version the retaining fixture corresponds to at least part of a side internal wall of the seat, also the side internal wall of the seat has several ribs protruding radially inside and penetrating or pressed into the pressed part. According to the second version the retaining fixture has several fixing lugs projecting over the bottom of the seat. According to the third version the retaining fixture is formed with a fixing rod transferred in axial direction in the seat; while the pressed part has a hole for this fixing rod inserted into it.

EFFECT: ensuring preliminary assembly of fixing device eliminating melting pressed part out of thermo-fusible glue.

4 cl, 6 dwg

FIELD: construction.

SUBSTANCE: device has working plate with deepenings, lower or bottom surfaces of which are created by upper working surfaces of puncheons, which are pointedly displaced by their sides walls in deepenings in working plate. On working plate, aside from deepenings, there is a displaced reservoir that contains powder glue for filling of deepenings in working plate. As reservoir is being displaced, its side edges slide along working plate flush with its surface. On the other side of deepenings there are sleds arranged in working plate, which serve as support for fastening element placed in them and in which through openings are provided for puncheons extended upwards from working plate. Above deepenings in working plate there is a pressing puncheon with pressing plate lowered onto fastening element. At the distance from sleds there is a position of fastening elements heating prior to their placement into position above deepenings in working plate up to temperature required for sticking or melting of thermomelting glue to them.

EFFECT: method and device make it possible to evenly apply thermomelting glue, to glue surfaces of complex shape and to fully automate the process.

4 cl, 14 dwg

FIELD: wood-working industry; methods of production of the glued woodwork.

SUBSTANCE: the invention is pertaining to the method of production of the glued woodwork and the wooden components. The invention presents the method of production of the glued woodwork or the wooden components with usage of the glue systems. At that application of the glue on the heated wooden details or the wooden components is exercised by the separate application of the glue resin and the curing agent (the binding), or the glue system representing the mixture of the glue resin and the curing agent. Before application of the glue on the wooden details or components execute the uniform heating along the whole cross-section of the wooden details or the wooden components by means of the microwave radiation. The invention also presents the description of application of the method for production of the profile of the massive wood. The technical result of the invention is reduction of the time of pressing of the wooden details and the wooden components, the increased efficiency of the production of the glued structural wooden details and the wooden components.

EFFECT: the invention ensures reduction of the time of pressing of the wooden details and the wooden components, the increased efficiency of the production of the glued structural wooden details and the wooden components.

10 cl, 2 dwg

FIELD: wood-working industry; other industries; methods of the surfaces adhesive bonding.

SUBSTANCE: the invention is pertaining to the field of wood-working industry ,in particular, to the method of joining the surfaces including application of the adhesive bonding composition (A) on the surface of the first detail made out of the material, drying of the dissolvent by the evaporation (partial or complete),by the forced drying with production of the gluten composition (B) containing the solid substances of Х mass % directly after the stage of the drying, application of the component (C) containing the dissolvent having the content of the solid substances of Z mass % - on the surface of the second detail made out of the material. At that Z < X, joining the two surfaces together, so that the gluten composition (A) was in the contact with the component (C), pressing the two surfaces to each other. The invention also is pertaining to the method of production of the products on the basis of the wood.

EFFECT: the invention ensures the reliable adhesive bonding of surfaces.

19 cl, 1 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: composition contains: (a) an isocyanate component containing an aliphatic isocyanate and an aromatic isocyanate, and (b) a polyol component containing an acrylic polyol and a polyester-polyol, wherein the acrylic polyol contains a mixture of a hard acrylic polyol with glass transition temperature (Tg) higher than 20°C and a soft acrylic polyol with Tg lower than 20°C. Also described is a method of teating an aged polyurethane surface using said composition, as well as a substrate having an aged polyurethane surface and a polyurethane coating from the disclosed composition.

EFFECT: obtaining a polyurethane coating composition which enables to obtain reproducible and reliable interlayer adhesion for a novel coating on an aged surface without carrying out sand blasting or washing with a solvent.

19 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to use of a composition obtained by reaction of polyisocyanate with index 100-250, which is diphenyl methane isocyanate, optionally containing a homologue which contains 3 or more isocyanate groups, and/or a version of such a diisocyanate with monoalkylether of polyoxyalkylene monoamine having average molecular weight of 550-3000 and content of oxyethylene higher than 50% by weight, calculated based on the weight of monoamine and an alkyl group having 1-4 carbon atoms as a plasticiser in thermoplastic and thermosetting materials which contain less than 50% hard units, and containing a certain number of urethane and/or urea groups. The invention also relates to a method of producing a plasticised thermoplastic or thermosetting material with content of hard units of less than 50%, which contains a certain number of urethane and/or urea groups, using said composition, as well as the material itself.

EFFECT: novel composition which is suitable as a plasticiser, is liquid at atmospheric pressure, does not migrate or is not released onto the surface of materials containing a certain number of urethane or urea groups, and is more effective than earlier urethane plasticisers.

11 cl, 4 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to versions of a water-based coating composition which is suitable for use particularly in the aerospace field. The water-based coating composition contains: (a) an essentially anhydrous basic component containing at least one hydrophilic polyol resin and at least one hydrophobic polyol resin, (b) an activating component containing at least one hydrophobic polyisocyanate and (c) water, wherein said composition contains 1-3 wt % of an organic solvent of the total weight of the water-based coating composition and component (a), (b) and (c) are mixed shortly before applying the water-based coating composition. In one version of the composition, the hydrophilic polyol resin can be selected from a group consisting of polyesters, polyethers, polyurethanes, caprolactones, alkyde resins and combinations thereof. Described also is a coating made using the polyurethane compositions disclosed herein.

EFFECT: obtaining water-based coating compositions which are stable during storage and have significantly low content of volatile organic compounds, coatings from which have improved technical characteristics such as impact resistance, specular gloss and longevity.

15 cl, 17 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing polyisocyanates which contain allophanate and silane groups by reacting (A) at least one hydroxy urethane or hydroxy amide, having silane groups, which is obtained by reacting aminosilanes with cyclic carbonates or lactones with molar excess relative to NCO reactive groups of component (A), (B) at least one diisocyanate with aliphatically, cycloaliphatically, araliphatically and/or aromatically bound isocyanate groups, in the presence of a catalyst which speeds up formation of allophanate groups and, optionally, subsequent removal of unreacted excess diisocyanates. Polyisocyanates which contain allophanate and silane groups obtained using said method are also described.

EFFECT: obtaining polyisocyanates which contain allophanate and silane groups which also have high isocyanate functionality in each molecule yet also low viscosity, which improves operating properties of polyisocyanates, especially as cross-linking components in polyurethane lacquer and coatings.

13 cl, 10 ex

Adhesive substances // 2466149

FIELD: chemistry.

SUBSTANCE: invention relates to aqueous compositions for gluing substrates, a method of obtaining such compositions, as well as a method of making latent-reactive coatings, films and powders from said compositions. The aqueous compositions for gluing substrates contain: polymers dispersed in water, having groups capable of reacting with isocyanate, such as urethane groups and urea groups; at least one dispersed solid aliphatic polyisocyanate which is not surface-active, with softening temperature higher than or equal to 40°C; one or more compounds of group (subgroup) 5 and 6 elements, in which the oxidation state of said element is at least +4; and optionally other additives and auxiliary materials.

EFFECT: obtaining novel compositions for gluing substrates and latent-reactive coatings, films and powders based thereon, which are stable during storage and stable with respect to colour.

18 cl, 1 dwg, 6 ex

FIELD: construction.

SUBSTANCE: invention represents an emulsion, in which oligomers with terminal isocyanate groups are a dispersion medium, and a disperse phase is a solution or a dispersion produced as a result of mixing a lime solution with calcium hydroxide content of 10-70 wt % with glycerine in the amount of 1-250 wt parts per 100 wt parts of calcium hydroxide, besides, the disperse phase content in the composition makes 1-55 wt %.

EFFECT: development of a cheap and easy to apply composition, coatings from which have high adhesion to moist metal or concrete surfaces, have proper adhesion to concrete applied onto them, are hardened with specified speed at temperature from zero and above, inhibit processes of metal corrosion and have low elasticity module.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a coating composition containing a) polyacrylate polyol obtained via polymerisation of unsaturated olefin monomers, where at least 40 wt % of the monomers include straight or branched alk(en)yl or alk(en)ylene groups, having at least 4 carbon atoms; b) polyether polyol obtained via esterification of component links having functional groups which form an ester, where at least 30 wt % of component links include straight or branched alk(en)yl or alk(en)ylene groups with at least 4 carbon atoms per functional group, which forms an ester, where he polyether polyol has hydroxyl number higher than 280 mg KOH/g and hydroxyl functionality of at least 2, and c) isocyanate-functionalised cross-linking agent. The invention also relates to a set of parts for preparing the coating composition and a method of applying the coating composition. The coating composition can be used as a top coating layer in multilayer paint coats, in finishing or reworking automobiles or large vehicles.

EFFECT: coating has high hardness, scratch resistance, lustre, longevity and wear resistance, chemical resistance and UV radiation resistance.

15 cl, 6 tbl

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention relates to coating composition, applied, for instance, as transparent coatings, base coatings, pigmented coating layers, used, prime coatings, etc. Composition contains polyisocyanate, polyol, metal-based catalyst for carrying out reaction of addition reaction between isocyanate groups and hydroxyl groups, thiol-functioning compound and carboxylic acid, carbonyl group of carboxylic acid being in connection with π-electronic system.

EFFECT: creation of novel coating composition, demonstrating presence of favourable property balance, namely, low level of volatile organic solvent content with operation viscosity, high rate of hardening and long viability, which results in obtaining coatings, which demonstrate good outlook characteristics, in particular, low liability to formation of pinholes, and good hardness.

14 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: polyisocyanate contains biuret groups, has functionality on isocyanate groups of not less than 4 and not more than 10 and is obtained using a method which includes (A) reaction of a polyisocyanate adduct with a secondary monoamine of formula (R1)(R2)NH, with the ratio of the isocyanate equivalent to the amine equivalent ranging from approximately 4:1 to approximately 14:1 to introduce biuret groups into said polyisocyanate, and (B) reaction of the polyisocyanate containing biuret groups with a blocking reagent. The polyisocyanate adduct (a) is obtained from 1,6-hexamethylenediisocyanate, (b) has average functionality on isocyanate groups of not less than 2.5 and not more than 8, and (c) contains isocyanurate groups. The blocking reagent is selected from a group comprising phenol, cresol, amides, oximes, hydrazones, pyrazoles and phenols which are substituted with long aliphatic chains.

EFFECT: obtaining blocked polyisocyanates which combine relatively low viscosity and low molecular weight with high functionality on isocyanate groups and high reactivity relative to binders used in coatings, as well as which are stable during storage with respect to increase in viscosity and are virtually colourless, which is especially important for systems which form transparent coatings.

9 cl, 6 ex, 5 tbl

FIELD: chemistry.

SUBSTANCE: aqueous polyurethane dispersion composition contains polyurethane with carbodiimide and/or carboxyl groups, and polyurethane dispersion adhesive which contains polyurethane with carbodiimide and/or carboxyl groups. The polyurethanes are polyester-polyurethane elastomers. The aqueous polyurethane dispersion composition and polyurethane dispersion adhesive also contain at least one carbodiimide which contains at least one carbodiimide group. The aqueous polyurethane dispersion composition and polyurethane dispersion adhesive react with each other through a polyaddition reaction when heated to 50°C or higher. A polymeric film having an undercoating is obtained by depositing and drying the single-component aqueous polyurethane dispersion composition on a polymeric film. A composite is obtained by reacting the polymeric film having an undercoating with a substrate on which polyurethane dispersion adhesive is deposited and dried. The composite can be produced industrially and can be especially used in interior finishing, preferably of a component built into a transportation vehicle or can be used in the furniture industry.

EFFECT: high reliability of the composition.

5 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing self-curing polyurethane dispersions, use thereof as coating agents, coating agents containing these self-curing aqueous dispersions, a method of coating substrates, as well as substrates treated with coating agents. The method of producing self-curing aqueous polyurethane dispersions involves the following steps: I. reacting al) polyisocyanate with a mixture of, a2) 2,2-bis(hydroxymethyl)alkanecarboxylic acid as an anionic hydrophilisation agent containing a group which is reactive towards isocyanate and, a3) at least one polyol component with average OH-functionality >1, wherein any mixture from a2) and a3), or component a1) k) contains at least one catalyst selected from a group consisting of tertiary amines, tin, zinc or bismuth compounds; II obtaining an OH-functional polyurethane without NCO-groups from step I, which then; III. a4) is mixed with a reactive blocking agent for isocyanate groups, selected from a group consisting of butanone oxime, diisopropylamine or tert-butylbenzylamine, 3,5-dimethylpyrazole, triazole, respectively, mixture thereof; IV. subsequent reaction of that mixture from step III with a5) one or more polyisocyanates selected from group a1), wherein these polyisocyanates are the same as or are different from al), and subsequent V. obtaining a physical mixture of OH-functional polyurethane without NCO-groups and a blocked polyisocyanate from step IV, after which after either; VI. acid groups of OH-functional polyurethane a6) are completely or partially deprotonated by adding a neutralising agent; VII. and the polyurethane obtained at step VI id dispersed in water, or step VII is carried out before step VI.

EFFECT: obtaining self-curing aqueous polyurethane dispersions containing negligible amounts of cosolvent.

14 cl, 1 tbl, 5 ex

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