Solid multilayer magnetic pigments and foil

FIELD: chemistry.

SUBSTANCE: invention can be applied in paintwork and other industries. It claims multilayer magnetic pigment flakes and paint compositions containing thereof. Magnetic pigment flakes include central magnetic layer with first base surface, opposite second base surface, and at least one side surface; first insulation layer applied to the first base surface of magnetic layer; second insulation layer applied to the second base surface of magnetic layer; first reflector layer over the first insulation layer; and second reflector layer over the second insulation layer. Effective thickness of the insulation layers capable of preventing corrosion of a pigment flake. Magnetic pigment flakes can also include central magnetic layer; insulation layer practically surrounding the magnetic layer; and reflector layer practically surrounding the insulation layer.

EFFECT: prevention of pigment flake corrosion in aggressive environment and increased magnetic pigment colour saturation and brightness.

2 ex, 1 tbl, 5 dwg

 

The technical field to which the invention relates.

The present invention relates to pigments and foils. In particular, the present invention relates to a durable multi-layer pigmented plates (layers, scales, plates and foil, which contain magnetic layers and can have varying optical characteristics, as well as to pigment compositions comprising a multilayer magnetic pigment lamina.

The level of technology

Developed various pigments, dyes and foil, which finds diverse applications. So, for example, developed a magnetic pigments used for decoration of kitchen utensils, create template surfaces and personal protective equipment. Were also developed svetoizluchayuschie pigments designed for use in cosmetics, inks, coating materials, decorations, ceramic materials, automotive paints, stamps and inks used in order to combat counterfeiting and to protect documents and currency.

Svetoizluchayuschie pigments, dyes and foil have the ability to change color when the angle of the lighting or angle. Svetoizluchayuschie properties of pigments and foils can be adjusted through appropriate design of optical thin films or at a certain orientation of the molecules used in ishemic for the formation of a plate or foil photosensitive patterns. Desired effects can be achieved by changing parameters such as the thickness of the layers of which are formed of plates and foil, and refractive index of each layer. Changes in the perception of color occurring when changing the viewing angle or angle of incident light, are the result of a combination of selective light absorption material layers and interference effect that is dependent on the wavelength of the incident light. The interference effects associated with the imposition of the repeatedly reflected light waves responsible for changing the color perceived from different angles. The position and intensity of the maximum reflectance change when the viewing angle changes due to the change of the interference effects associated with differences in the length of the trajectory of the incident light in different layers of material that are selectively amplified with specific wavelengths.

To achieve svetoizluchayuschih effects, different approaches were used. So, for example, a small multi-layer plates, usually consisting of multiple layers in the form of thin films, dispersively in this environment, as paint or ink, which can then be deposited on the surface of the object. To achieve the desired color and optical effects such plates can be coated. Another approach is the encapsulation m is lcih metal or silica substrates with different number of layers with subsequent distribution of the encapsulated substrates in such an environment, as paint or ink. In addition, there was obtained a foil consisting of multiple thin-film layers deposited on a substrate.

One way of obtaining a multilayer thin-film structure provides for the forming of a flexible mesh material with a release layer. The various layers are applied to the grid of well-known methods of forming structures with thin coatings such as PVD, sputtering, etc. After that, a multilayer thin-film structure is removed from the mesh material in the form of a thin film svetoizluchayuschih plates that can be placed in a polymer medium, for example in different pigment of the media used in ink or paint. To achieve the desired results of the color change in ink or paint in addition to svetoizluchayuschih records can be entered other additives.

Svetoizluchayuschie pigments or foil formed of a multilayer thin-film structure, including the same basic layers. Such structures include an absorbent layer (s), dielectric layer (s) and, optionally, a reflective layer located in an arbitrary order. As a result, the coating containing a symmetrical multilayer thin-film structure, for example:

the absorber/dielectric/reflector/dielectric/absorber; or

the absorber/dielectr is to/sink.

Can also be formed by coating containing an asymmetric multilayer thin-film structure, for example: absorber/dielectric/reflector.

In US Patent No. 4838648, issued in the name of Phillips et al. (hereinafter "Phillips '648")relating to magnetic pigments, described thin-film magnetic svetosimunska structure, in which the reflective or absorptive layer can be used magnetic material. One of the described magnetic materials served as an alloy of cobalt and Nickel. In Phillips '648 describes the plate, and foil the following structure:

painted substrate/absorber/dielectric/a magnetic layer/a substrate; a painted substrate/absorber/dielectric /a magnetic layer /dielectric/absorber/painted substrate; and

the adhesive/magnetic layer/dielectric/absorber/removable hard coating/substrate.

Attempt introducing a magnetic layer in a multilayer plate is disclosed in European Patent Publication EP 686675 B1, issued in the name of Schmid et al (hereinafter "Schmid"), and this document describes laminar svetoizluchayuschie structure including a magnetic layer located between the dielectric layer and the Central aluminum layer:

oxide/absorber/dielectric/magnet/AI/magnet/dielectric/absorber/oxide.

In the patent Schmid used aluminum plates that cover the magnetic material is mi. However, the upper magnetic material reduces the reflective properties of the pigment, since aluminum is the second most striking metal (after silver) and any magnetic material has a lower reflectivity. In addition, in the method of Schmid used aluminum plate, obtained by grinding in a ball mill, which introduces limitations associated with the smoothness of the formed layer.

In accordance with the above, there is a need for an improved magnetic pigment plates and foil, not having the disadvantages of the known plates and foils.

The invention

The present invention relates to a multilayer pigment plates and foil, with magnetic properties. Pigmented plates can have a batch (stacking) layer structure located on opposite sides of the magnetic core, or can be formed as a sealed structure with encapsulated layers around the magnetic core. The magnetic core in a stacked layer structure includes a magnetic layer located between the layers of insulator, which in turn is located between the reflecting layers. Similarly, the magnetic core in a sealed structure includes a magnetic layer, surrounded by a layer of insulator which, in turn, is surrounded by a reflective layer. And aeroasia layers of pigmented plates prevent corrosion of the plates under severe environmental conditions.

Some embodiments of the magnetic pigment plates and foil demonstrates how to change color at different angles of incident light and review. Embodiment with changing colors provide a discrete color shift associated with the presence of the first color at the first angle or review and a second color, different from the first, the second angle or view.

Pigmented plates can be made in such a liquid, such as paint or ink, with the formation of the coloring compositions for later use on objects or documents. The foil can be applied in layers to different objects or formed on the substrate of the substrate.

These and other distinguishing features of the present invention will become clearer from the following description and appended claims, or may be understood from the practical implementation of the invention, examples of which are given below.

Brief description of drawings

To illustrate the above and other distinctions of the invention, a more particular description of the invention will be presented with reference to the accompanying drawings. It should be borne in mind that the drawings represent only typical embodiments of the invention and do not limit the scope of the invention. The present invention will be specifically and in detail described and explained using the use of the accompanying drawings, on which:

Figure 1 - scheme of the covering structure of the magnetic pigment of the plate in accordance with one of the embodiments of the invention;

Figure 2 - scheme of the covering structure of the magnetic pigment of the plate in accordance with another embodiment of the invention;

Figure 3 - scheme of the covering structure of the magnetic pigment of the plate in accordance with another embodiment of the invention;

Figure 4 - scheme of the covering structure of the magnetic pigment of the plate in accordance with an alternative embodiment of the invention; and

Figure 5 - diagram of the covering structure of the magnetic foil of the present invention.

Detailed description of the invention

The present invention relates to a multilayer pigment plates and foil with the magnetic layers and pigment compositions comprising a magnetic plate. Such plates and foil can be used to create visually imperceptible protective signs, create illusory or similar to three-dimensional images for security systems or provide the product with decorative features. Unlike most traditional magnetic plates plates of the present invention consists of not only the magnetized materials, but include, as of the magnetized and non-magnetized materials. For example, the invention covers the pigment is haunted plate, and foil in which an insulating layer is located between the magnetic and reflective layers. An insulating layer in pigmented plates and foil substantially prevents corrosion of the plates and foil under severe environmental conditions.

It was found that the magnetic pigment with a magnetic layer adjacent to the layer of reflective metal, for example aluminum, is best suited for the environment with controlled temperature and humidity. Under severe impact the environment, such as outdoors in conditions of high humidity, salt fog or solution of such a magnetic pigment decomposes due to galvanic corrosion is the most electronegative metal, for example aluminum.

Galvanic corrosion (also called corrosion of dissimilar metals) is a process in which the material oxidizes or corrodes in contact under certain conditions with other material. For the occurrence of galvanic corrosion requires three specific conditions. Firstly, there should be two electrochemically dissimilar metal. Secondly, these metals have to be in contact with each other to provide electrical conductivity between them. Thirdly, you must have a conductive path that ensures the movement of metal ions from h is the most electronegative metal (anode) to the more electrobiological metal (cathode). In the event of failure of any of the three conditions galvanic corrosion does not occur.

In order to reduce corrosion of the magnetic pigments containing adjacent dissimilar metals, it is enough to exclude one of the three above conditions, the occurrence of galvanic corrosion. The easiest way to eliminate the condition, consisting in the presence of an electric contact between dissimilar metals, placing between them is very thin insulating layers. Various pigmented designs and foil with insulating layers are described in detail below.

In various embodiments of the present invention pigmented plates and foil demonstrate a significant change in the saturation of the color shade when the angle of the incident color or angle. This optical effect, known as goniochromism or "color shift", allows us to perceive color change when changing the angle of the lighting or review. Accordingly such pigmented plates and foil show a first color at a first angle or review and a second color different from the first, the second angle or review. Pigmented plates can be made in such a fluid environment, such as paints or inks, with the formation of various coloring compositions with color shift, intended for use on objects or documents. Foil m which may be laminated to different objects or may be formed on the carrier substrate.

Pigmented plates of the present invention with a color shift can contain symmetric covering the stacked structure on opposite sides of the Central magnetic layer, asymmetric covering the structure of multiple layers on one side of the magnetic layer or can be formed using one or more encapsulated coatings surrounding the magnetic core. The structure of the coating svetoizluchayuschih plates and foil typically includes a magnetic core, which contains magnetic or layer capable of magnetization and other optional layers, an insulating layer, on a magnetic core, a reflective layer on the insulating layer, the dielectric layer on the reflective layer and the absorbing layer on the dielectric layer. The term "on"used in the context of the relationship between layers, refers to both the contact layer and the non-contiguous layers.

The present invention provides a dramatic improvement over the traditional magnetic pigments in terms of achieving a significantly higher saturation and brightness of color. In the premises matting magnetic material inside the reflector in the present invention are achieved two goals: 1) is the reflectivity of the reflective layer and the apparent magnetic characteristics based on the relative the positive magnetism magnetic sdoa; and 2) svetoizluchayuschie pigments without the inner core of magnetic material cannot be distinguished by an observer from the same pigment with a core of magnetic material. For example, in joint consideration by observer two objects with a coating containing magnetic material and without it, both look the same. However, magnetic svetasreni pigment provides a hidden sign of security in addition to the color shift. Using magnetic detector system hidden magnetic signature in the pigment can be read, for example, using a rotating detector Faraday.

As a result, the impact on pigment plate of the invention the external magnetic force, orienting the plane of some of the plates perpendicular to the surface of the coating containing records can be created illusory effects or effects that are similar to the three-dimensional image. Pigmented plates, not oriented by the magnetic field, usually its flat surface parallel to the surface of the coating. The effect of three-dimensional image associated with this arrangement of the particles when their aspect ratio is oriented by the magnetic field, i.e. when the longest part of the pigment of the plate is aligned along the magnetic field lines. How to create illusory and t is Echternach images which can be used are described magnetic pigments are described in detail in co-filed patent application, U.S. Patent application serial No. 09/850421) from may 7, 2001, entitled "Methods for producing imaged coated articles by using magnetic pigments", the contents of which are referred to in the present description.

Svetoizluchayuschie plate and foil of the present invention can be obtained using traditional methods of depositing thin films, which are well known in the field of thin-film structures. Not limiting the scope of the invention examples of such methods of depositing thin films can serve as physical deposition from the gas phase (PVD), chemical deposition from the gas phase (CVD), reinforced by the action of plasma (D) variants of these methods, such as PECVD or downward PECVD, sputtering, electrolytic deposition, and other methods of application, leading to the formation of discrete and homogeneous layers of thin film.

Svetoizluchayuschie pigment plate of the present invention can be formed in various ways. So, for example, pigmented plates can be formed by a method of applying a coating on the mesh, in which the various layers are sequentially applied to the mesh material of the traditional methods with the formation of the thin-film structure, which is then destroyed and removed from the grid, e.g. the, using a solvent with formation of multiple thin-film plates.

According to another method, one or more layers of a thin film including at least one magnetic layer, applied to the grid with the formation of the film, which is then broken down and removed from the grid with the formation of many predecessors plates. If necessary, these precursors can undergo further fragmentation as a result of crushing. Further predecessors put the remaining layer or layers using the method of serial encapsulation with the formation of multiple pigmented plates.

According to another method, the magnetic particles can be applied in the serial encapsulation with the formation of multiple pigmented plates. In the case when the process is serial encapsulation is used to form the outer layers of the plates, it should be noted that each encapsulating layer is a continuous layer consisting of a single material surrounding lamellar structure.

In the drawings, where similar structures are indicated by the same symbols, figure 1 depicts the reflective magnetic plate (RMF) 20 in accordance with one of the embodiments of the present invention. RMF 20 may be a symmetric thin-layer structure, terzidou magnetic layer 22, the first insulating layer 25 above the main surface of the magnetic layer 22 and the second insulating layer 26 on the opposite second main surface of the magnetic layer 22. The first reflective layer 27 is located on the first insulating layer 25, and the second reflecting layer 28 is located on the second insulating layer 26.

In the space insulating layer between the reflective layer and the magnetic layer prevents galvanic corrosion of the plate. In addition, as shown in figure 1, when placed in a magnetic layer between the outer reflective layer of the optical properties of the reflective layers are not violated and the plate retains a high reflectivity.

Plate, corresponding RMF 20, can be formed using the above-described process of applying on the net, in which the various layers are sequentially applied to the mesh material to form a thin-film structure, which is destroyed and removed from the grid with the formation of multiple plates. On the other hand, the first and second reflective layers 27 and 28 can be formed as part of the adjacent reflection layer 29 (shown in dashed lines), the ambient magnetic layer 22 and the insulating layers 25 and 26, which were pre-formed using a deposition process on the net.

RMF 20 can be used as a pigmented plate or the Central section coated with additional layers, as is the case in svetoznamem pigment. If svetosimunska pigment maintaining the high reflectivity of the reflective layer is an important factor for the brightness and the hue of the pigment. Below detail the nature of each layer structure of the coating RMF 20.

The magnetic layer 22 may be composed of any magnetic or magnetized material, such as Nickel, cobalt, gadolinium, terbium, dysprosium, erbium, and their alloys or oxides. So, for example, can be used cobalt-Nickel alloy containing cobalt and Nickel in the amount of 80% and 20%, respectively. When adjusting this ratio in the alloy between cobalt and Nickel by +10% is still achieved the desired results. Thus, the cobalt may be present in the alloy in an amount of 70-90 wt.%, and Nickel in the amount of 10-30 wt.%. Other examples of alloys can serve Fe/Si, Ni/Fe (e.g., permalloy), Fe/Ni, Fe/Co, Fe/Ni/Mo, and combinations thereof. Can also be used such strong magnets, as SmCo5, NdCo5Sm2Co17Nd2Fe14B, Sr6Fe2About3, TbFe2AI-Ni-Co, and combinations thereof, as well as spinel ferrites of the type Fe3O4, NiFe2O4, MnFe2O4, CoFe2O4or grenade type YIG (yttrium iron garnet) or GdIG (gadolinium iron garnet), and their combinations.

Although n is something that can be used in such a wide range of magnetic materials, in some embodiments of the invention, it is preferable to use a soft magnets. Used the term "soft magnetic" refers to any material having ferromagnetic properties, but with residual magnetization is close to zero after exposure to the magnetic force. Soft magnets show a rapid response to the applied magnetic field, but have a very low coercive field (Hc)=0.05 to 300 OE(e)) or zero magnetic characteristic or retain a very low magnetic lines of the applied force after removal of the magnetic field. Used the term "strong magnets (also called permanent magnets) refers to any material having ferromagnetic properties and demonstrating long-term magnetization after exposure to the magnetic force. The ferromagnetic material may be any material that has a permeability greater than 1 and showing the effect of magnetic hysteresis.

Magnetic materials used for forming the magnetic layers in the plates and foil of the present invention, preferably have a coercivity of less than 2000 uh, more preferably less than 300 E. the Term "coercivity" refers to the ability of the material to demagnetization under the action of an external magnetic field. The higher the value of the coercivity, the higher is the magician who itogo field, want to demagnetization of the material after removal of the field. In some embodiments of the present invention, it is preferable to use magnetic layers of soft (easily rismanchian) magnetic materials in contrast to "strong" (hard rismanchian) magnetic materials having high coercitivity. Coercivity foil, pigments or dyes magnetic svetoizluchayuschih structures of the present invention preferably comprise from about 50 to about 300 E. Such coercivity lower than the corresponding values in the standard recording materials. Thus, embodiments of the present invention, involving the use of soft magnets in magnetic svetoizluchayuschih pigments and magnetic pigments without color changes represent an improvement of traditional technologies. The use of magnetic materials in pigmented plates provides superior dispersibility without clumping.

The magnetic layer 22 can be formed so that its suitable physical thickness ranged from about 20 to about 3000 nm, preferably from about 50 to about 150 nm.

The insulating layers 25 and 26 may consist of any suitable electrical insulating material such as a dielectric material or some of poluprovodn the same materials. For example, the insulating layers may be composed of magnesium fluoride, aluminum oxide, Nickel oxide or combinations thereof, as well as any other insulating material, suitable for use in the process of obtaining thin films and appropriately electrically insulating properties.

The insulating layers have an effective thickness that is substantially prevents corrosion of the pigment of the plate, breaking the electrical conduit between the metal reflective layer (discussed above) and a magnetic pigment layer of the plate. For example, each of the insulating layers may have a physical thickness of at least about 10 nm, preferably from about 20 to about 40 nm.

Reflective layers 27 and 28 can consist of various reflective materials. The preferred materials can serve one or more metals, one or more alloys, or combinations thereof, which is associated with high reflectivity and ease of obtaining them, but can also be used non-metallic reflective materials. Examples of suitable metallic materials for the reflecting layer, not limiting the scope of the invention, can serve as aluminum, silver, copper, gold, platinum, tin, titanium, palladium, Nickel, cobalt, rhodium, niobium, chromium, iridium, and combinations thereof or their alloys. Reflective layers 24, 26 could the t formed so so they had suitable physical thickness constituting from about 20 to about 1000 nm, preferably from about 50 to about 100 nm.

According to an alternative embodiment of the plate 20 may be provided asymmetric thin-film plate including a thin-film stacked structure of the same layers that are located on one side of the magnetic layer 22, as shown in figure 1. According to this embodiment of the asymmetric plate includes a magnetic layer 22, the insulating layer 25 covering the magnetic layer 22 and the reflective layer 27 covering the insulating layer 25. Each of these layers may consist of the same materials and have the same thickness as specified above for the respective layers of the plate 20.

In accordance with another embodiment of the reflecting layers 27 and 28 of the plate 20 can optionally be applied opposite the dielectric layers. Such dielectric layers contribute to the increase of the service life of the plate 20, increase its strength and resistance to corrosion. On the other hand, may be formed with a sealing dielectric layer surrounding the reflective layers 27, 28 and the magnetic layer 22. The dielectric layers can be transparent or capable of selective absorption, causing a color effect pigment of the plate. Below, with reference to the embodiment of Brienne in figure 2, examples of suitable dielectric materials for such dielectric layers.

Figure 2 depicts the magnetic svetozarevo pigment plate 40 on the basis of RMF corresponding to another embodiment of the present invention. The plate 40 is typically a symmetrical multilayer thin-film structure with covering layers on opposite sides RMF42, representing a five-layer system similar to that shown for RMF on figure 1. As shown in figure 2, the first dielectric layer 44 and the second dielectric layer 46 deposited on the opposite side RMF42. The first absorbent layer 48 and the second absorbing layer 50 are respectively on each of the dielectric layers 44 and 46. RMF42 may be formed of the same materials as discussed above for RMF figure 1, whereas the dielectric and absorbing layers of the plate 40 are discussed more fully below.

Plates similar to the plate 40 may be formed using the previously described process of coating a grid in which the various layers of the plate 40 is sequentially applied to the mesh material to form thin film patterns, which is then destroyed and removed from the grid with the formation of multiple records.

The dielectric layers 44 and 46 function as spacers tonkoplenochnoi the stacked structure of the plate 40. Forming the dielectric layer has an effective optical thickness to provide an interference color and the desired svetoizluchayuschih properties. Consider the dielectric layers can be transparent or selectively absorbing, causing the pigment color effect. The optical thickness is a well-known optical parameter defined by work - ηd, where η represents the refractive index of the layer, and d is the physical thickness of the layer. Typically, the optical thickness of the layer expressed by a quarter wave optical thickness (QWOT), which is equal to 4ηd/λwhere λ represents the wavelength at which conditions are implemented QWOT. The optical thickness of the dielectric layers may have a value in the range from about 2 QWOT at a target wavelength of 400 nm to about 9 QWOT at a target wavelength of 700 nm, preferably about 2-6 QWOT at 400-700 nm depending on the desired color shift. The dielectric layers may have a physical thickness from about 100 to about 800 nm, preferably from about 140 to about 650 nm, depending on the desired color characteristics.

Suitable materials for the dielectric layers 44 and 46 include materials with high refractive index, measured by more than 1.65, and materials from the "low" indicator is recomline, determined by the value of about of 1.65 or less. Each of the dielectric layers may be formed from a single material or multiple materials of different configurations. For example, the dielectric layers can be formed only from a material with low refractive index, or only from a material with high refractive index, of a mixture or multiple sublayers of two or more viscoplasic materials, mixtures or multiple sublayers of two or more with high refraction material or of a mixture or set of sub-layers of materials with high and low refractive indices. In addition, the dielectric layers may be fully or partially formed of high/low dielectric stacks, which are discussed more fully below. In the case when the dielectric layer is partially formed of dielectric optical stack, the remaining portion of the dielectric layer, as noted above, may be formed from a single material or combinations of materials with different configurations.

Examples of suitable materials with high refractive index for forming the dielectric layers 44 and 46 may include zinc sulfide (ZnS), zinc oxide (ZnO), zirconium oxide (ZrO2), titanium dioxide (TiO2), diamond-like carbon, indium oxide (In2 About3), indium-tin oxides (ITO), pathiakis tantalum (TA2About5), cerium oxide (CeO2), yttrium oxide (Y2About3), europium oxide (Eu2About3such oxides of iron as oxide (II)dagelet(III) (Fe3O4) and iron oxide (Fe2About3), hafnium nitride (HfN), hafnium carbide (HfC), hafnium oxide (HfO2), lanthanum oxide (La2O3), magnesium oxide (MgO), neodymium oxide (Nd2About3)oxide, praseodymium (Pr6O11)oxide, samarium (Sm2About3), antimony trioxide (Sb2O3), silicon monoxide (SiO), selenium trioxide (Se2About3), tin oxide (SnO2), tungsten trioxide (WO3), combinations thereof, etc.

Examples of suitable materials with low refractive index for forming the dielectric layers 44 and 46 may be silicon dioxide (SiO2), aluminum oxide (AI2About3), fluorides such as magnesium fluoride (MgF2), aluminum fluoride (AIF3)fluoride cerium (CeF3), lanthanum fluoride (LaF3), sodium aluminum fluorides (e.g., Na3AIF6, Na5AI3F14), neodymium fluoride (NdF3), samarium fluoride (SmF3), barium fluoride (BaF2), calcium fluoride (CaF2), lithium fluoride (LiF), combinations thereof or any other material with a low refractive index having a value of approximately of 1.65 or less. So, for example, as nicopilo the Commissioner of materials can be used organic monomers and polymers, including diene or alkenes such as acrylates (e.g., methacrylate), perforamcne, polytetrafluoroethylene (Teflon), fluorinated ethylene propylene (FEP), combinations thereof, etc.

It should be noted that some of the listed materials are usually present in non-stoichiometric forms, often depending on the specific method used for depositing dielectric material in the form of the coating layer, and the above title compounds reflect the approximate stoichiometry. So, for example, silicon monoxide and silicon dioxide respond to nominal ratios of silicon : oxygen is 1:1 and 1:2 respectively, while the actual ratio of silicon : oxygen in a specific dielectric covering layer is slightly different from the nominal values. Such non-stoichiometric dielectric materials are also covered by the scope of the present invention.

As noted above, the dielectric layers can be formed of high/low dielectric optical stacks containing alternating layers of materials with low (L) and high (H) refractive indices. In the case when the dielectric layer is formed of high/low refractive dielectric stacks, the color shift will depend on the overall refractive index of the layers in the stack. Examples of suitable staff is selected configurations of dielectric layers include LH, HL, LHL, HLH, HLHL, LHLH, or in General (LHL)nor (HLH)nwhere n=1-100, as well as different sets and combinations thereof. So, for example, in the stacked LH indicates the presence of discrete layers of material with low refractive index and a material with a high refractive index.

According to an alternative embodiment form high/low refractive dielectric stacks with a gradient refractive index. For example, the stack may be formed from layers with a gradient change of the indicator from low to high, from high to low, from low to high to low]n, [from high to low to high]nwhere n=1-100, and combinations of these systems and their sets. The scaling exponent is the result of a gradual change in the index of refraction of adjacent layers, for example from low to high or from high to low. Graded refractive index layers can be obtained by using different gases during deposition or co-deposition of two materials (for example, L and N) in different ratios. Various optical stacks with high/low refractive index can be used to enhance svetoizluchayuschih characteristics, providing the antireflective properties of the dielectric layer and change the color dia is Altanbulag pigments of the present invention.

Each of the dielectric layers 44 and 46 may consist of one or different materials and may have the same or different optical or physical thickness. It should be noted that in the case when the dielectric layers consist of different materials or have different thicknesses, each side plate has a different color and the resulting mixture plates in the pigment or the dye will have a new color that is the combination of two color shades. The resulting color will be based on additive color theory, two color shades of the two sides of the plate. In the case of multiple plates, the resulting color will be the additive sum of the two colors in a random distribution plates, various side which is oriented in the direction of the review.

Absorbing layers 48 and 50 of the plate 40 can consist of any absorbing material having the desired adsorption properties, including material that is homogeneous or heterogeneous absorb in the visible part of the electromagnetic spectrum. Depending on the desired color characteristics can be used selectively absorbing (heterogeneous absorbent materials or selectivity absorbing (uniformly absorbent materials. For example, the absorbing layers can be formed from electing absorbing metallic material, inflicted with such a thickness of the coating, when the absorbing layer is at least partially absorbing or polymerasechain.

Not limiting the scope of the invention examples of absorbing materials can be such metal materials as chromium, aluminum, Nickel, silver, copper, palladium, platinum, titanium, vanadium, cobalt, iron, tin, tungsten, molybdenum, rhodium, niobium, as well as the corresponding oxides, sulfides and carbides. Other absorbing materials include carbon, graphite, silicon, germanium, kermet, iron oxide or other metal oxides, metals, mixed with a dielectric matrix, and other substances capable of performing the functions of non-selective or selective absorbers in the visible part of the spectrum. For the formation of the absorbing layers of the plate 40 can be used in various combinations, mixtures, compounds or alloys of the above absorbing materials.

Examples of suitable alloys of the above absorbing materials can serve as Inconel (Ni-Cr-Fe), stainless steel, Hastelloy (hastalloys) (for example, Ni-Mo-Fe; Ni-Mo-Fe-Cr Ni-Si-Cu) and alloys based on titanium, such as titanium alloy with carbon(Ti/C), titanium mixed with tungsten (Ti/W), titanium mixed with niobium (Ti/Nb), titanium mixed with silicon (Ti/Si), and combinations thereof.

As noted above, the absorbing layers can also consist is made of an absorbing metal oxide, sulfide, metal carbide, metal or combinations thereof. For example, one of the preferred sulfide absorbing material is a sulfide of silver. Other examples of suitable compounds for absorbing layer can serve such such compounds as titanium nitride (TiN), oxynitride titanium (TiNxOy), titanium carbide (TiC), tungsten carbide titanium nitride (TiNxCz), the carbide oxynitride titanium (TiNxOyCz), titanium silicide (TiSi2), Boyd titanium (TiB2), and combinations thereof. If TiNxOyand TiNxOyCzpreferably, x=0-1, y=0-1, a z=0-l, and in TiNxOyx+y=1, and in TiNxOyCzx+y+z=1. If TiNxCzpreferably, x=0-1, a z=0-1, when x+z=1. On the other hand, the absorbing layers can consist of alloys based on titanium in the matrix of Ti or can be composed of Ti in the matrix of titanium alloy.

For the specialist in this area should be clear that the absorbing layers can also be formed from magnetic materials such as cobaltocene alloy, or other above-described magnetic materials. This results in a simpler manufacture of the magnetic svetoizluchayuschih pigments, reducing the number of required materials.

Generated absorbing layers have a physical thickness in the range of 3-50 nm, preferably 5-15 nm depending on the optical constants of the material of the absorbing layer and the desired maximum color shift. Each of the absorbing layers may consist of identical or different materials and may have the same or different physical thickness.

According to an alternative embodiment of the plate 40 can be obtained asymmetric svetosimunska plate including a thin-film stacked structure with the same layers that are located on one side of the RMF 42, as shown in figure 2. Accordingly asymmetric svetosimunska plate includes RMF 42, dielectric layer 44 deposited on the RMF 42, and an absorbent layer 48 deposited on the dielectric layer 44. Each of these layers may consist of the same materials and have the same thickness, as described above for the respective layers of the plate 40. In addition, asymmetric svetoizluchayuschie plate can be obtained by using the above-described coating process on a grid, in which the various layers are sequentially applied to the mesh material to form thin film patterns, which are further broken down and removed from the grid with many records.

According to another embodiment of the plate 40 can be formed without absorbing layers. In accordance with this voploscheni the m opposite the dielectric layers 44 and 46 can be arranged in such a way, the plate 40 will have the following structure covering: (HL)n/RMF/(LH)n, (LH)n/RMF/(HL)n, (LHL)n/RMF/(LHL)n, (HLH)n/RMF/(HLH)nor other similar configuration, where n=1-100, a L and H layers are 1 quarter-wave (QW) at the corresponding wavelength.

As a rule, galvanic corrosion between the two metals occurs when the algebraic difference of their nuclear potentials in the Table of noble metals above ±to 0.3 volts. Potential pair aluminium/Nickel is 1,41, indicating that the driving force for galvanic corrosion of aluminium in this seven-layer pigment, as Cr/MgF2/AI/Ni/AI/MgF2/Cr in the case where the pigment is immersed in the electrolytic solution or exposed to wet environments. This seven-layer pigment is particularly sensitive to the effects of alkali or other basic solutions. To reduce corrosion of aluminium in this pigment electrical contact between dissimilar metals AI and Ni eliminated by placing between them the above-described insulating layers. Under this scheme the design of the seven-layer pigment change with the formation of devyatichastnogo pigment shown in figure 2, in which, as shown below, between the layer of aluminum and a layer of magnetic material placed two insulating with the OYA:

Cr/MgF2/AI/MgF220 nm/magnetic composite/ MgF220 nm/AI/ MgF2/Cr

To facilitate the receipt of such a system two insulating layer in this embodiment may be made of magnesium fluoride, which is a component of the dielectric layers of pigment. Manufacturer of pigment with an insulating layer of MgF2requires the use of two additional stages, including fast polyester roll (grid) partially covered with a multilayer stack and application of insulating layers on magnesium fluoride. According to an alternative scheme, aluminum and magnetic layers can be separated from each other by applying a film of AI2O3thickness of 20 nm in the reaction evaporation of aluminum in the presence of oxygen.

In accordance with yet another alternative circuit surface of the first reflecting layer, for example, of aluminum, is subjected to the oxidation of a surface of a magnetic layer deposited on oxidized reflecting layer, is subjected to oxidation to form oxide films between the different nature of the metals. According to this method is slightly below the source of aluminium and above the source of the magnetic material include ion cannon. In the first aluminum layer applied from a source of aluminum on the first dielectric layer, which is deposited on the first the second absorbent layer, passes through the oxidation zone, where the surface is subjected to oxidation with formation of a dense insulating film of aluminum oxide. Parameters for determining the film thickness of the AI2O3are the oxygen pressure, the capacity of the ion gun and the rewinding speed of polyester roll. In the next stage of magnetic material (e.g., Nickel) is applied on top of the insulating film from AI2O3,. In the zone of oxidation on the surface of the magnetic material is formed by a dense layer of NiO, resulting in the magnetic layer is isolated from the subsequent second aluminum layer. The NiO layer is a semiconductor p-type electrically separating layer of Nickel and a second aluminum layer. After applying the second aluminum layer to form the second dielectric layer, for example, in the form of a strip of magnesium fluoride, followed by the second absorbing layer, for example of chromium, the final formation of the optical stack that has the following structure:

Substrate/Cr/MgF2/AI/AI2O3/Ni/NiO/AI/MgF2/Cr

The thickness of the insulating layer in the method using ion cannons should be less than 20 nm, because these layers have a higher density than films deposited by thermal or reactive evaporation. The advantage of this process is that analogice process, which is used for forming a layered stack, in regard to the number of passes polyester roll through the device for applying the coating, however, in the method using the ion gun produces strong deviationa design, resistant to corrosion in wet conditions and in the electrolytic solution.

Figure 3 depicts the reflective magnetic encapsulated (RME) plate 60 according to another embodiment of the invention, in which two insulating layers on both sides of the Central magnetic layer 64 in contact with each other and cover the side surface of the magnetic layer 64 and wrap the Central magnetic layer 64 and form a surrounding insulating layer 63 and in which the reflective layers form a reflective layer 62, which covers and wraps surrounding the insulating layer 63. RMF plate 60 has a three-layer structure of the coating, in which a reflective layer 62 is surrounded and encapsulated in an insulating layer 63 which surrounds the Central magnetic layer 64. The insulating layer 63 between the reflective layer 62 and the magnetic layer 64 prevents galvanic corrosion of the plate 60. In addition, as shown in figure 3, in the presence of a magnetic layer inside the outer reflective layer of the optical properties of the reflective layer is not particularly limited and this layer maintains high neg is athelney capability.

RMF plate 60 can be used as pigment particles or as a Central particle, which is applied to the additional layers. A reflective layer 62, an insulating layer 63 and the magnetic layer 64 may be composed of the same materials and can have the same thickness, as described for the respective layers of the plate 20.

According to another embodiment of the plate 60 of the dielectric layer can be optionally deposited on the reflecting layer 62, which increases the service life, durability and corrosion resistance of the plate 60. The dielectric layer may be transparent or selectively absorbing, which contributes to the color effect of the plate.

Figure 4 depicts an alternate cover patterns (dashed lines) for the magnetic svetosimunska pigment plate 80 in the form of incapsulate based on RMF or RME records, discussed with reference to figures 1 and 3. The plate 80 has a magnetic core 82, representing the RMF or RME record, which may be covered with an encapsulating dielectric layer 84, surrounding the Central magnetic portion 82. An absorbent layer 86, which covers the dielectric layer 84, an external sealing plate 80. Hemispherical dashed line on one side of the plate 80 in figure 4 show that the dielectric layer 84 and an absorbent layer 86 mouthbut formed in adjacent layers around a Central magnetic portion 82.

On the other side of the Central magnetic section 82 and the dielectric layer can take the form of a Central thin-plate layer structure in which the opposing dielectric layers a and 84b pre-formed on the upper and lower surfaces, but, at least, neither on one side surface of the magnetic Central section 82, representing the RMF, and an absorbent layer 86 seals the thin-film layered structure. The sealing process can also be used for forming additional layers on the plate 80, such as a protective layer (not shown). Pigment plate 80 shows a discrete color shift such that the pigment plate has a first color at a first angle or review and the second color shift other than the first, the second angle or view.

According to another embodiment of the plate 80 can be formed without the absorbing layer. In accordance with this embodiment the dielectric layer 84 are formed from adjacent high/low refractive (H/L) dielectric optical coatings, similar to the discussed above dielectric optical stacks. For example, the dielectric layer 84 may have a covering structure type (HL)n, (LH)n, (LHL)n, (HLH)nor other configurations, the de n=1-100, a L and H layers are 1 QW at a certain wavelength.

For the formation of dielectric and absorbing layers of encapsulation can be used in various traditional ways of application of coatings. For example, suitable methods of forming the dielectric layer include vacuum deposition from the gas phase, Sol-gel hydrolysis, CVD in a fluidized bed, the downward impact of the plasma on the vibrating trays filled with particles and electrochemical deposition. Suitable methods of forming the absorbing layer include vacuum deposition from the gas phase and deposition on the layer of particles subjected to mechanical vibration, as described in US Patent No. 6241858 B1, referenced in the present description. On the other hand, absorbing coating can be applied pyrolytic decomposition of ORGANOMETALLIC compounds or by using a CVD process carried out in the fluidized bed. If not there will be an additional grinding, using such methods receive encapsulated magnetic core, on which is deposited a dielectric and absorbing layers. To obtain a pigment plates with lots of encapsulating coatings can be used in combination of the above methods of application.

Various modifications and combinations of the above-described embodiments are also included in on the region of the present invention. For example, each of the above structures can be formed by additional dielectric, absorbing and/or other optical coatings, which make it very desirable optical properties. Such additional coatings can provide additional color effect pigments.

In addition, on the outer surfaces of each of the above-described pigment structures can be formed not necessarily transparent top coating, which increases the service life of such structures. For example, figure 2 depicts a first transparent coating 52 on the absorbing layer 50 and the second transparent coating 54 on the absorbing layer 48. Figure 4 depicts an optional overlay coating 90, surrounding an absorbent layer 86. Considering the coating may be composed of any suitable transparent material, providing protection, for example from the above dielectric materials with high and low refractive indices, as well as from such polymers as acrylates and styrene, vitreous materials, such as silicate or borosilicate glass, or combinations thereof. Formed transparent top coating may have a suitable physical thickness in the range from about 5 nm to about 10 microns, preferably from about 100 nm to about 1 μm.

Additional embodiments of records, which is s can be modified by the inclusion of an insulating layer between the magnetic and reflective layers, described in co-filed patent application No. 09/844261 from April 27, 2001, entitled "Multi-layered magnetic pigments and foils", the contents of which are referenced in this description.

Pigmented plates of the present invention can be introduced into the environment pigment with obtaining a coloring composition, which can be used on a variety of objects or documents. Added on Wednesday pigmented plates provide a specific optical response when illuminated surface utverzhdenii environment. Preferred pigment environment contains a resin or mixture of resins that can be dried or overiden with such heat, as the crosslinking under the action of heat setting under the action of heat, thermal evaporation of the solvent or photochemical crosslinking.

Suitable pigment environment includes various polymer compositions or organic binder components, such as alkyd resin, polyester resin, acrylic resin, urethane comprising polyurethane resin, vinyl resin, epoxy, styrene, etc. are Examples of suitable resins may include melamine acrylates such as methyl acrylate, ABS resin plant) resins, formulations, inks and paints based on alkyd resins and various mixtures of these substances. Preferred pigment environment contains Rast is oritel resins, for example, an organic solvent or water. Plates, combined with the pigment medium, form a coloring composition, which can directly be used as a paint, ink or moldable plastic material. The dye composition can also be used as an additive in traditional paint, ink, or plastic materials.

In addition, the plate may optionally be mixed with various additives, such as a typical pigmented plates, particles or dyes of different colors, different saturation and brightness, to ensure the desired color characteristics. So, for example, plates can be mixed with other conventional pigments interpereting or reinterpreting types of getting another color range. Pre-mixed composition can be distributed in such a polymer medium as paint, ink, plastic, or other polymeric pigment binder, for use in the traditional way. Examples of suitable additives are given in the above-cited jointly filed application No. 09/844261.

Magnetic svetoizluchayuschie plate of the present invention is particularly useful for use in cases where it is desirable to obtain a solid dye high color saturated the spine. The use of magnetic svetoizluchayuschih records in coloring compositions can be obtained paints or inks high color saturation with a long service life, various color effects which are noticeable to the human eye. Svetoizluchayuschie plate of the present invention have a variety of svetosimunska properties, including strong changes color saturation (degree of color purity) and a significant change of tone (relative color) at different angles. So, objects, painted with paint containing svetoizluchayuschie plate of the invention, will change color depending on changes in the viewing angle or angle of the object relative to the observer's eye.

Pigmented plates of the present invention can easily and economically be used in paints and inks that can be applied to various objects or documents, such as motorized vehicles, banknotes and security documents, home appliances, architectural design, flooring, fabrics, sporting goods, packaging/housing electronic devices, packaging products, etc. in Addition, svetoizluchayuschie plates can also be used when forming the colored plastic materials, coating compositions, stamps, elect the static coatings, glass and ceramic materials.

Foil of the present invention has an asymmetric thin film covering the structure, which may correspond to the layer structures on one side of the RMF in any of the described embodiments relating to thin-film stacked plates. The foil can be laminated to various objects or formed on the host substrate. The foil of the invention can also be used in the configuration of the hot stamping, where a thin-film stack foil is removed from the detachable layer of the substrate using thermoactivation adhesive and is applied on the opposite surface. The adhesive may be applied to the surface of the foil opposite to the substrate, or applied in the form of a UV-activated adhesive on the surface to which you attach the foil.

Figure 5 depicts the covering structure svetosimunska foil 100 formed on the substrate 102, which may be any suitable material such as flexible PET mesh carrying substrate or other plastic material. Foil 100 includes a magnetic layer 104 deposited on the substrate 102, an insulating layer 106 on the magnetic layer 104, a reflective layer 108 on the insulating layer 106, the dielectric layer 110 in the reflective layer 108, and an absorbent layer 112 on the dielectric layer 110. Magnetic, isolated the store, reflecting, dielectric and absorbing layers can consist of the same materials and have the same thickness, as described previously for the corresponding layers in plates 20-40.

Foil 100 can be formed using a deposition process on a grid, in which the above various layers are sequentially applied to the grid of the traditional ways of drawing with the formation of the thin film foil. Foil 100 may be formed on the detachable grid layer, whereupon it can be removed and attached to the object. In addition, foil 100 may be formed on the host substrate, representing the net without detachable layer.

To increase the lifetime of the foil of the invention may be formed by an optional transparent coating. For example, in figure 5 the dotted line shows a transparent top coat 114 deposited on the absorbing layer 112. A transparent cover covering 114 may consist of any suitable transparent material, providing protection, such as the above-mentioned materials used in transparent top coating pigment structures of the invention, and may have the same thickness.

An additional embodiment of the foil, which can be modified so that they include an insulating layer located mezhdunarodnym and reflective layers, described in the above-cited jointly filed application No. 09/844261. The magnetic pigment of the plate and the foil of the present invention can be used in other embodiments, such as various optical products with a paired optically variable structures. Such optical products described in application No. 09/844261. In the application No. 09/844261 also described the use of magnetic pigments and foils.

The following examples are given to illustrate the present invention and not limit its scope.

Example 1

Various samples of pigmented plates with varying bright color with the same thickness MgF2and Cr, but with different thickness of the insulating layer was obtained by coating thin film layers on the grid. Thin-film layers removed from the receiving plates reduced size of about 20 nm (average size of a single plate).

The first sample of the pigment lamina had a traditional five-layer structure of Cr/MgF2/AI/MgF2/Cr. The second pigment sample plate was magnetic and had a seven-layer structure of Cr/MgF2/AI/Ni/AI/MgF2/Cr. The third pigment sample plate was also magnetic and had deviational structure of Cr/MgF2/AI/MgF2/Ni/MgF2/AI/MgF2/Cr. Insulating layers of the MgF2between layers AI and Ni had a thickness of 16 nm. The fourth sample of the pigment is lestingi had a design coating of nine layers, similar to the third sample, except that the insulating layers of the MgF2between layers AI and Ni had a thickness of 23 nm. The fifth sample pigmented plates had the same design cover of nine layers, similar to the third sample, except that the insulating layers of the MgF2between layers AI and Ni had a thickness of 25 nm. The sixth sample of the pigment lamina possessed magnetic properties and had deviational construction coating Cr/MgF2/AI/AI2O3/Ni/AI2O3/AI/MgF2/Cr. Insulating layers of AI2About3between the layers of AI and Ni had a thickness of 20 nm.

Example 2

The media paints and background pigments samples from Example 1 were mixed in the ratio of 9:1 to obtain samples of the paint. Samples of paint were distributed on polyester plates with a spatula. Dry pieces of dyed polyester size 1"×3" was immersed for 10 minutes in 2 wt.% an aqueous solution of NaOH. The color of each sample was determined before and after immersion. For comparison, the test samples used values of the color differences Δthat is, the Color difference ΔE in L*a*b* color space determines the degree of color change, but not the direction is determined by the equation:

ΔE=[(ΔL*)2+(Δa*)2+([Δb*)2]1/2

where ΔL*, Δ*, Δb* denote differences in the values of L*, a* and b* is responsible for. Great value ΔE. indicate large color differences caused by the degradation of thin-film layers in pigmented plates. In this example, ΔE represents a color change due to exposure to NaOH. Table 1 shows the color differences for all subjects painted samples.

Table 1
SampleThe design of the pigmentΔE after exposure to NaOH
15-layer stack of dissimilar metals34,20
27-layer stack insulating layer54,77
39-layer stack with an insulating layer of MgF2the thickness of 16 nm59,93
49-layer stack with an insulating layer of MgF2thickness of 23 nm39,32
59-layer stack with an insulating layer of MgF2the thickness of 25 nm31,34
69-layer stack with an insulating layer of AI2About3thickness of 20 nm34,00

As follows from the results presented in Table 1, samples 2 and 3 are characterized by a significantly large value ΔE. after immersion in NaOH than samples 4-6,including a thicker insulating layers. Samples 4-6 shows the color differences are comparable with the values for sample 1, not containing dissimilar metals.

1. Magnetic pigment plate including a Central magnetic layer having a first major surface opposite a second major surface and at least one side surface;

the first insulating layer deposited on the first main surface of the magnetic layer;

a second insulating layer deposited on the second main surface of the magnetic layer;

the first reflecting layer on the first insulating layer; and

the second reflecting layer on the second insulating layer,

moreover, the insulating layers have an effective thickness to substantially prevent corrosion of the pigment lamina.

2. Magnetic pigment plate according to claim 1, in which the first and second insulating layers in contact with each other and cover the side surface of the Central magnetic layer and wrap the Central magnetic layer and in which the first and second reflective layers cover and wrap insulating layer that wraps the Central magnetic layer.

3. Magnetic pigment plate according to claim 1 or 2, in which the pigment plate has a reflectivity corresponding to the reflectivity of reflecting the love, and has magnetic characteristics based on the relative magnetism of the magnetic layer.

4. Magnetic pigment plate according to claim 1, in which the first and second insulating layers deposited on the first and second main surfaces, and not on at least one side surface of the magnetic layer.

5. Magnetic pigment plate according to claim 1, in which the first and second reflective layers form part of the adjacent reflective layer surrounding the magnetic and insulating layers.

6. Magnetic pigment plate according to claim 1 or 2, in which the magnetic layer comprises a soft magnetic material.

7. Magnetic pigment plate according to claim 1 or 2, in which the magnetic layer includes a material with a coercivity of less than 2000 E.

8. Magnetic pigment plate according to claim 1 or 2, in which the magnetic layer includes a material with a coercivity of less than 300 E.

9. Magnetic pigment plate according to claim 1 or 2, in which the magnetic layer includes a material selected from the group consisting of iron, Nickel, cobalt, gadolinium, terbium, dysprosium, erbium, their alloys and oxides.

10. Magnetic pigment plate according to claim 1 or 2, in which the magnetic layer includes a material selected from the group consisting of Fe/Si, Fe/Ni, Fe/Co, Fe/Ni/Mo, and combinations thereof.

11. Magnetic pigment plate according to claim 1 or 2, in which the magnetic layer includes a hard magnetic m is a material predetermined.

12. Magnetic pigment plate according to claim 1 or 2, in which the magnetic layer includes a material selected from the group consisting of SmCo5, NdCo5Sm2Co17Nd2Fe14B, TbFe2and their combinations.

13. Magnetic pigment plate according to claim 1 or 2, in which the magnetic layer includes a material selected from the group consisting of Fe3O4, NiFe2O4, MnFe2O4, CoFe2O4, YIG, GdIG, and combinations thereof.

14. Magnetic pigment plate according to claim 1 or 2, in which the magnetic layer has a physical thickness of from about 20 to about 300 nm.

15. Magnetic pigment plate according to claim 1 or 2, in which the insulating layers include a dielectric material.

16. Magnetic pigment plate according to claim 1 or 2, in which the insulating layers include at least one material selected from the group consisting of aluminum oxide, magnesium fluoride, Nickel oxide and combinations thereof.

17. Magnetic pigment plate according to claim 1 or 2, in which the insulating layers have a physical thickness of at least 10 nm.

18. Magnetic pigment plate according to claim 1 or 2, in which the reflective layers include reflective material selected from the group consisting of aluminum, silver, copper, gold, platinum, tin, titanium, palladium, Nickel, cobalt, rhodium, niobium, chromium, iridium, and combinations or alloys.

19. The magnet is th pigmented plate according to claim 1 or 2, in which the reflective layers have a physical thickness from about 20 to about 1000 nm.

20. Magnetic coloring composition, including:

pigment environment; and

a lot of the pigment platelets dispersed in the pigment medium, and the pigment plates are basically the same multilayer structure as the pigment plates made according to claim 1 or 2.

21. Magnetic coloring composition according to claim 20, in which the pigment includes a material selected from the group consisting of acrylic melamine, urethanes, polyesters, vinyl resins, acrylates, methylmethacrylate, ABS resins, epoxides, styrene, ink and dye formulations based on alkyd resins and mixtures thereof.

22. Magnetic pigment plate according to claim 1, further including:

the first absorbing layer on the first dielectric layer; and

the second absorbing layer on the second dielectric layer,

moreover, pigmented vinyl shows this discrete color shift that it shows the first color at the first angle or review and a second color different from the first color, the second angle of incident light or view.

23. Magnetic pigment plate on p.22, in which the first and second dielectric layers include a dielectric material with a refractive index of about of 1.65 or less is.

24. Magnetic pigment plate on p.22, in which the first and second dielectric layers include a dielectric material with a refractive index greater 1,65.

25. Magnetic pigment plate on p.22, in which the first and second reflective layers form part of the adjacent reflection layer surrounding the magnetic layer and the insulating layers, the first and second dielectric layers form part of the adjacent dielectric layer, essentially surrounding the adjacent reflecting layer, and the first and second absorbing layers form part of the adjacent absorbing layer surrounding the adjacent dielectric layer.

26. Magnetic pigment plate on article 22, further comprising a first transparent covering layer on the first absorbing layer and the second transparent covering layer applied to the second absorbent layer.

27. Magnetic svetosimunska coloring composition, including:

pigment environment; and

many svetoizluchayuschih pigmented plates having virtually the same multilayer structure as the pigment plate made according to article 22.

28. Magnetic pigment plate, including:

the Central magnetic layer;

an insulating layer, almost surrounding the magnetic layer; and a reflective layer, almost surrounding the insulating layer,

while the insulating layer has an effective thickness, prevents corrosion pigment lamina.

29. Magnetic pigment record p, in which the insulating layer includes a dielectric material.

30. Magnetic pigment plate on item 21, in which the insulating layer includes a material selected from the group consisting of aluminum oxide, magnesium fluoride, Nickel oxide and combinations thereof.

31. Magnetic pigment plate on item 21, in which the insulating layers have a physical thickness from about 20 to about 40 nm.



 

Same patents:

FIELD: pigment preparation.

SUBSTANCE: invention can be applied in production of multilayer pigments for laser marking of papers and plastics, said pigments being based on glass scales used in paints, lacquers, plastics, foil, ceramic materials, and cosmetic compositions. In these pigments, glass scales are coated with at least three alternate layers having high and low refraction index values. Pigments include at least one sequence of layers, which comprises: (A) coating with refraction index n≥1.8, (B) coating with refraction index n≤1.8, and (C) coating with refraction index n≥1.8. and, if necessary, (D) outer protective layer, provided that layer packet (A)+(B) can be present in standard layer-by layer assembly (A)+(B)+(C) up to four times.

EFFECT: intensified interferential color of multilayer pigments.

11 cl, 9 ex

FIELD: chemical industry; printing industry; powder metallurgy industry; cosmetic industry; other industries; production and application of the highly anticorrosive metallic pigments.

SUBSTANCE: the invention is pertaining to production of the of the highly anticorrosive metallic pigments similar to laminas, which may be used in production of the printing ink, plastic materials, cosmetics, the powder coatings and in other branches of industry. The pigments have on their surfaces: the metallic substrates similar to the laminas and treated with the compounds of the phosphoric acid and-or the compounds of the boric acid; one or more layers of the coatings consisting of one or more hydrated oxides of the metals of one or more metals selected from the group, which includes silicon, aluminum, zirconium, titanium and tin. On the basis of the highly corrosive metallic pigments similar to laminas it is possible to produce the interferential colored pigments. The invention allows to increase the anticorrosive resistance of the metallic pigments at the expense of saving without the faults of the initial surface smoothness of the similar to the laminas metallic substrates, to increase the homogeneity and density of the layers of the hydrated oxides of the metals.

EFFECT: the invention ensures the increased anticorrosive resistance of the metallic pigments, saving the initial surface smoothness of the similar to the laminas metallic substrates, the increased homogeneity and density of the layers of the hydrated metals oxides.

40 cl, 9 ex, 4 tbl, 8 dwg

FIELD: paint and varnish materials.

SUBSTANCE: invention describes a composition used in decorative finishing and comprising the following components, wt.-%: 20% solution of polymethylmethacrylate in dichloroethane as a film-forming agent, 20.5-23.25; aromatic solvent, 70.5-74.5, and aluminum powder modified with an organic dye by grinding, 4.25-5.0, taken in the ratio = 1:(0.005-0.008). The proposed composition provides decorative effect of cover mimic to mother-of-pearl with good adhesion of the composition on plastics of different chemical nature. Invention can be used in coloring plastics with imitation of mother-of-pearl, in particular, for national consumption goods.

EFFECT: improved and valuable properties of composition.

2 tbl, 2 ex

FIELD: chemical industry; printing industry; other industries; methods of production of the composition of the paint including the optically changeable pigments.

SUBSTANCE: the invention may be used in production of the optically changeable pigments. The optically changeable pigment includes the stratified set composed of the different materials, in which, at least, one of the layers represents the reflecting layer and, at least, one of the other layers represents the dielectric layer. At least, one of the surfaces of the indicated layers is subjected to the chemical action. The indicated materials also include, at least, one of the layers, which represents the semitransparent metallic layer made out of chromium and also one or more metals and-or their inorganic compounds. At that the metal and-or its inorganic compound are subject to corrosion. The subjected to the chemical action surface of the reflecting and dielectric layer along the edge of the layering block of the edge structure of the pigment is coated with the passivating agent, which is selected from the group consisting of the organic esters and the fluorinated organic esters of the phosphoric acid, having the following structural formula: (Rf-CH2-CH2-O)xP(O)(OH)y, where Rf=F-(CF2-CF2)z, х=1 or 2, у=2 or 1, х+у=3, z=l-7. The composition of the printing paint includes the binding system, water and the optically changeable pigment. The invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

EFFECT: the invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

22 cl, 7 ex

The invention relates to multicolor paints, water-based, which is used to produce coatings with good characteristics and different color combinations

The invention relates to analytical chemistry, and in particular to compositions of water-sensitive pastes, and can be used to determine the boundary between the oil or oil and water reservoirs, tanks, tankers, settling treatment facilities of factories, where it is necessary to regularly monitor the level of oil products, oil and water

The invention relates to color coatings on glass and can be used in the production of the mirror light sources used in illuminated plants

FIELD: chemical industry; printing industry; powder metallurgy industry; cosmetic industry; other industries; production and application of the highly anticorrosive metallic pigments.

SUBSTANCE: the invention is pertaining to production of the of the highly anticorrosive metallic pigments similar to laminas, which may be used in production of the printing ink, plastic materials, cosmetics, the powder coatings and in other branches of industry. The pigments have on their surfaces: the metallic substrates similar to the laminas and treated with the compounds of the phosphoric acid and-or the compounds of the boric acid; one or more layers of the coatings consisting of one or more hydrated oxides of the metals of one or more metals selected from the group, which includes silicon, aluminum, zirconium, titanium and tin. On the basis of the highly corrosive metallic pigments similar to laminas it is possible to produce the interferential colored pigments. The invention allows to increase the anticorrosive resistance of the metallic pigments at the expense of saving without the faults of the initial surface smoothness of the similar to the laminas metallic substrates, to increase the homogeneity and density of the layers of the hydrated oxides of the metals.

EFFECT: the invention ensures the increased anticorrosive resistance of the metallic pigments, saving the initial surface smoothness of the similar to the laminas metallic substrates, the increased homogeneity and density of the layers of the hydrated metals oxides.

40 cl, 9 ex, 4 tbl, 8 dwg

FIELD: preparation of nickel filler for production of current-conducting composition on base of epoxy diane resin ЭД-20 for shielding and contacting of metal surfaces.

SUBSTANCE: proposed method includes drying of nickel powder ПНК-1Л5 which is immersed in alcohol-nephrase mixture before drying at alcohol-to-nephrase ratio of 1:1 and is mixed for 5-10 minutes at temperature of 25±10°C ; drying is first performed at temperature of 25±10°C continued for an hour and then at temperature of 100±10°C continued for 3-5 hours; then, mixture is cooled down to temperature of 25±10°C.

EFFECT: reduction of specific volume resistance of current-conducting adhesive composition.

FIELD: composite materials.

SUBSTANCE: invention relates to powdered composite filler for elastomer materials suitable for fabrication of articles operated under dry friction or increased wear conditions used in engine, compressor, and pump manufacturing industries. Particles of filler comprise at least one nucleus of inorganic material, in particular quasi-crystalline alloy Al-Cu-Fe or quasi-crystalline alloy Al-Cu-Cr and shell made from thermoplastic polymer with elasticity modulus 0.5 to 5.0 GPa and volume fraction of nuclei in a filler particle 1 to 10%. Process of preparing such composite filler resides in that inorganic material particles are activated in a mechanochemical activator with mechanical energy supply intensity 1 to 5 kW/kg and dose 30 to 1000 kJ/kg in a medium selected from a series: air, nitrogen, argon, and vacuum at pressure from 10-2 to 1 atm until particles with average size not larger than 15 μm are obtained, after which shell polymer is added to activator and inorganic material particles are modified at mechanical energy supply intensity 0,05 to 0.5 kW/kg and dose 3 to 100 kJ/kg in a medium selected from a series: air, nitrogen, argon, and vacuum at pressure from 10-2 to 1 atm.

EFFECT: lowered coefficient of friction under dry friction conditions and substantionally reduced summary rate of wear of friction pair under hydroabrasive wear conditions.

3 cl, 2 dwg, 3 tbl

The invention relates to the environment and prevents pollution of natural waters and soil copper compounds, while receiving valuable commercial production of pigment pastes
The invention relates to the field of ecology and allows not only to prevent contamination of natural waters and soils with heavy metals, in particular salts of chromium and iron, but also to dispose of the products of processing solutions

The invention relates to powder metallurgy, in particular to methods and devices for the manufacture of metal powders scaly form

FIELD: chemical industry and agriculture; production of hydrosol of ferric iron hydroxide.

SUBSTANCE: the invention is intended for a chemical industry, an agriculture and pedology and may be used at production of solutions for soils reclamation. 0.5 l of a ferric chloride solution with concentration of 0.5 l/mole gram-molecule is poured into a pan. Carbon electrodes are put into the solution. Pass a current of 1А. Each 5-60 seconds polarity of the electrodes is changed. In a result of replacement of anions of the salt for ions of the hydroxyl obtain a stable hydrosol of the ferric iron hydroxide. The invention allows to produce such sols using a simple and a production-friendly method commercially.

EFFECT: the invention allows to produce such sols using a simple and a production-friendly method commercially.

6 ex

The invention relates to the field of technology for inorganic pigments and can be used to obtain inorganic iron-containing modified pigment

FIELD: chemistry.

SUBSTANCE: invention can be applied in production of rutile-structured pigment based on titanium dioxide. The method of obtaining the base for pigment rutile titanium dioxide involves obtaining of source solution containing a titanium compound, addition of effective quantity of a salt catalyst to that solution, preferable addition of a chemical control agent to the solution, solution evaporation for obtaining dry amorphous intermediary product containing a mixture of titanium compounds, and baking of the intermediary product at the temperature under 500°C. Another variant of the method of obtaining the base for pigment rutile titanium dioxide uses eutectic mix of two or more NaCl, KCl and LiCl salts as the salt catalyst, melting temperature of the salt catalyst being lower than baking temperature.

EFFECT: reduction of rutile crystallisation temperature.

42 cl, 12 ex, 19 dwg

FIELD: chemistry.

SUBSTANCE: invention can be used for obtaining carbon black from natural gas. The method of obtaining carbon black involves supplying fuel and an oxidising agent to the combustion zone, and a turbulent stream of hydrocarbon gases to the cylindrical reaction chamber, with their subsequent decomposition into soot and hydrogen. Part of the cylindrical reaction chamber is made from high-melting porous material. The soot accumulates on the inner surface of cylinder 2 and partially penetrates into the porous material. In the pore space there is accumulation of soot, resulting in lower permeability of the walls. Mechanical oscillations at the resonance frequency of the porous part of cylinder 2 can be stimulated in the reaction chamber using vibrators 9 and 10. This will reduce cohesion of soot on the surface of the pores. In this way, there is separation of the soot and its deposition into volume 8. Hydrogen passes through the pores to combustion chamber 3 and extra heat energy is released from burning. That energy is used to heat cylinder 2.

EFFECT: lowering of specific energy consumption and specific metal quantity of the basic equipment.

1 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention pertains to use of raw compositions, consisting of oil, coal and petrochemical components for production of technical carbon. The working mixture of raw materials contains a heavy pyrolysis resin, benzol distillation residue, a fraction for recycling coal-tar resin and a product of catalytic cracking of distillation fractions of primary crude oil processing, in the presence of a zeolite-containing catalyst. The catalyst product cracking is in form of a heavy gasoil cut, boiling off in the 270-420 °C range, or a mixture of a heavy gasoil cut and a residue, boiling off at over 420 °C, taken with mass ratio of (65-97):(3-35) %. At 20 °C, the above mentioned product has density of less than 998 kg/m3, coking capacity of not more than 5.5 % and a correlation index of 102-125.

EFFECT: lower coking capacity of the working mixtures; increased output of technical carbon.

1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention pertains to modified silane oxide or silica filler, the method of obtaining it and its use. The modified silane oxide or silica filler consists of a fraction with grain size less than 75 mcm with percentage mass ratio less than 15%, and average particle size from 130 to 500 mcm. The proposed filler is obtained from reaction of at least one micro-grained oxide or silica filler in a liquefied gas with at least one silane. The modified silane oxide or silica filler can be used as lacquer, coating, cosmetic products, synthetic materials and rubber.

EFFECT: obtaining of dust-free modified silane filler, without use of water and organic solvents.

37 cl, 22 tbl, 3 ex

FIELD: organic chemistry.

SUBSTANCE: invention refers to granular carbon black production process. Produced granular carbon black contains mainly large-spherical granules and can be applied as intensifying extender of elastomers, as well as source material for sorbents and catalyst carriers. Method of carbon black granules production implies consecutive mixing of carbon black flow moving horizontally and rotating with line speed 5-12 m/s and solution of various concentration of bonding additive - molasses - in two zones until granules are formed. Then granules are dried. Molasses amount placed into first zone is 77-80% of required granules amount, the rest of molasses solution 20-23% is introduces to second zone. Invention provides granules production of 3-8 mm.

EFFECT: production of large-spherical carbon black granules.

11 ex, 1 tbl, 1 dwg

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