WO2009125235A1

WO2009125235A1 - Plaster for creating magnetable decorative surfaces, as well as procedure of making thereof

Info

Publication number: WO2009125235A1
Application number: PCT/HU2009/000030
Authority: WO
Inventors: Tamás BARNA; Zsolt Dobozy; Imre Kovács
Original assignee: Barna Tamas; Zsolt Dobozy; Kovacs Imre
Priority date: 2008-04-11
Filing date: 2009-04-09
Publication date: 2009-10-15
Also published as: HU0800236D0; HUP0800236A2

Abstract

The subject of the invention is a plaster for creating magnetable decorative surfaces, as well as procedure of making thereof, with the help of which fixing of objects and devices for decorative purpose is possible on solid surfaces with the help of different type and size magnets. The plaster according to the invention consists of an aqueous, ductile bearing material, as well as a magnetable additive added to the bearing material, which is characterized by that, it consists of aqueous, acrylic-dispersion basis, one-component sealing compound, flexible in a ductile way, of 7.5 ± 0.375 mass% of ion-exchanged water, of 3 ± 0.15 mass% of conserving agent, of 1.17 ± 0.0585 mass% aqueous anti-corrosion agent, and of one or several, altogether 1.17 ± 0.0585 mass% magnetable additive of iron content, on the mass of the sealing compound considered 100%. The invention is further a method for application of plaster for creating magnetable decorative surfaces, which is characterized by that, the plaster layer is spread on building construction surfaces, preferably on walls with usual surface forming technology, and there a magnetable layer of 0.05-15 mm thickness is formed. The invention is furthermore a method for application of plaster for creating magnetable decorative surfaces, which is characterized by that, the plaster layer is spread in the thickness of 0.05-3mm on rigid plate or sheet, preferably on coating plate, or sheet, used in building industry, in given case on plasterboard, or metal, wood, paper, stone, plastic, glass sheet. The invention is furthermore a method for application of plaster for creating magnetable decorative surfaces, which is characterized by that, the plaster layer is spread in the thickness of 0.1 -2mm between two flexible, or rigid plates or sheets and the plates or sheets are stuck together with the plaster.

Description

Plaster for creating magnetable decorative surfaces, as well as procedure of making thereof

The subject of the invention is a plaster for creating magnetable decorative surfaces, as well as procedure of making thereof, with the help of which fixing of objects and devices for decorative purpose is possible on solid surfaces with the help of different type and size magnets.

In our quickly changing world there is an ever increasing demand for solutions making possible easy and quick coating, decorating surfaces surrounding us, exchanging decoration, respectively in given case fixing of comparatively heavy objects on a surface with the least possible preparatory work. It is also expected, that fixing things on the surface should take place in an environmentally friendly way, without using synthetic adhesives. Due to the frequent exchange of decorations, fixed objects, it is important, that the surface to be decorated should not be damaged by the fixing of the object of decoration, as it happens during fixing with screws, nails, strong adhesives.

In the state of the art the HU 218 013 Hungarian patent description makes known a method for producing latex systems by ethylene aqueous emulsive polymerization of at least single unsaturated monomers. Here a water soluble protecting colloid of less than 75.000 molecular mass is used, and in given case, calculated on the total, ethylene unsaturated monomer content, an amount of 0.01 - 4.0 mass% of surface-active materials of anion, cation, non-ionic, or amphoteric character or their mixture. The process is extended to the latex system containing the above components, as well as to paint-, papercoating, respectively adhesive-, furthermore to binding materials.

Procedure for producing surface-coating materials of aqueous system, such as fire retardant paints and decoration, correcting material, as well as adhesives are described in the HU 180 292 Hungarian patent description. This method is furthermore suitable for making a compound producing a homogenous and stable blend with a binding material to make a filling material composition for coloring-, increasing water-tightness and rubbing fastness. The method is characterized by that, calculated on the dry material content of the composition, 5-99% aluminium oxide and aluminium sylicate mixture of such proportion, where the mixture contains at least 10% of both components is added to 1-95% different mineral filling material(s) known in themselves, so preferably to calcium carbonate, gypsum, dolomite, beryllonite in such a way, that the solid filling materials are suspended in water, and to this composition for coloring and improving rubbing fastness, in given case, they add organic and/or inorganic coloring materials, pH control reagent, moistener, anti-foam agent, organic filling material, thickening material, settling material, plasticizer, organic solvent, preservative material, fungicide, bactericidal material, or aqeuous solution of the above in any phase of the process.

The HU 210 414 Hungarian patent description makes known a method for producing a prefabricated element of decorating, coating and such like functions. During the method the rigid carrier surface is covered with the basic and colorful plaster of ornamental patterns and artistic ornaments, fresco, secco, graphitization stucco are made on this plaster, and the decorating element produced this way is put on the surface to be coated. According to the invention the carrier surface is a rigid, burnt bearing structure of raw ceramics, or a rigid smooth plate with a rabitz net of ceramic binding. The bearing structure, or the smooth plate reinforced by the rabitz net of ceramic binding is prepared by sprinkling with lime-cement-slurry, then a filling basic plaster is put into the grid hollows of the bearing structure, or into the openings of the rabitz net. After the sprinkling with a correcting-smoothing procedure a layer of pre-mixed laminar plaster of maximum 3mm thickness producing a simultaneous set is spread on the surface. In given case the surplus of lime-layer is removed by rubbing, then the patterns are transferred, drawn or engraved or fixed with a screening cylinder on the binded surface, resistable to touching.

The P 00 04180 Hungarian patent application published on 28 April 2001 refers to anti- corrosive compounds suitable for coating the back of mirrors, furthermore to products of metal surface coated with such compounds as well as to method for preventing the corrosion of thin metal layers on mirrors. According to the invention, a leadless inhibitor composition containing a compound with two or three nitrile groups - preferably imido-diaceto-nitrile or nitrilo-triacetonitrile - functioning as anti-corrosion agent - are applied as coating on the thin metal layers on the back of mirrors to protect them and prevent their corrosion.

The HU 172 926 Hungarian patent description refers to making lacquers of air bubble content, containing white pigments or filling materials. During production of lacquers white pigments with minimum 10%, preferably 20-50% smaller particle size, than the optimum average particle size and/or filling materials are dispersed, and the filling materials have at least 10%, preferably 20-80% smaller particle size, than the optimum average particle size at the binding materials free of air-bubbles, then the system is converted into lacquer of air-bubble content by drying. The white pigment or filling material contains 0.3-400 mass%, preferably 5-100 mass% titanium dioxide, zinc sulphite, zinc oxide, basic lead carbonate, basic lead sulphate, antimon trioxide, barium sulphate, calcium carbonate, calcium silicate, calcium sulphate, kaolin, dolomite, mica, chalk, quartz sand or talc calculated on the overall mass of the lacquer. The coating and dispersive capacity of the white coating systems made according to the method of the application is better, than the coating systems of optimum pigment particle size, or the coating systems of optimum particle size filling materials.

In the state of the art, the P 03 00456 Hungarian patent application published on 28 October 2004 describes a method for producing magnetable paint emulsion, correcting material and plaster, as well as the wall and decorative surface made by the same method. With the help of the method depicted in the application the aesthetic indoor painting, wall-papering of houses can be executed within a short time absolutely dust- free.

During the method according to the application the paint applied on the building construction elements is provided with additives before applying it. The characteristic of the method is that a magnetable additive of 50...70% proportion is put into the paint applied on the inner surface of the building construction elements by constant manual or mechanical mixing. The additive is preferably a magnetic powder and/or mild iron powder. The emulsion made this way is put onto the wall surface to be coated in the usual way, preferably at room temperature.

The solution according to the application is furthermore a method for producing magnetable correcting material, when the correcting material put on the building construction elements is provided with additive material before the application. The characteristic of the method is, that a magnetable additive, preferably a magnetic powder and/or mild iron powder of 50-70% proportion is put into the correcting material put on the inner surface of the building construction elements by constant manual or mechanical mixing, and the emulsion made this way is put onto the wall surface to be coated in the usual way, preferably at room temperature.

The solution according to the application is furthermore a method for producing magnetable plaster when the plaster put on the building construction elements is provided with additive material before the application. The characteristic of the method is, that a magnetable additive, preferably a magnetic powder and/or mild iron powder of 50-70% proportion is put into the plaster put on the inner surface of the building construction elements by constant manual or mechanical mixing, and the emulsion made this way is put onto the wall surface to be coated in the usual way, preferably at room temperature.

The subject matter of the application is furthermore wall and decorative surface, preferably with the application of the method according to the invention, where the said surface has a part for placing decorative elements. Its characteristic is, that surface decorative elements and/or figurative elements of magnetic foil are placed on the wall surface or on the building construction element provided with magnetable material.

The P 05 00405 Hungarian patent application published on 28 December 2006 makes known a method for magnetable emulsion for surface decoration, as well as the surface forming system made by this method.

During the method according to the application magnetable material of uniform particle size, preferably steel particles are mixed into the raw material of water or solvent base, preferably into acryl or silicone to make the magnetable surface decorating emulsion. In given case pearlite as filling material is mixed to it, or as an additional additive, in given case copper particles of uniform size are mixed. Glass fibre can be used as well as additional additive. The ready-made suspension can be colored during mixing, or at the end of mixing with a suitable coloring material as required.

In case of the surface forming system depicted in the application the emulsion produced by the method is put on the wall surface in itself, or with a carrier and is applied as a decorative element, preferably as wall-paper, respectively as an element for placing the decoration. According to the invention disclosed in the CN 105 2104 Chinese patent description published on 12 June 1991, graphite, cement, filling material and water are used as raw materials, these are mixed together, shaped in a form or under pressure by stamping, then it is taken out of the form and the material sets in a natural way, so the graphite- cement product is made this way. The specific volume resistance of the product can be regulated from 10 to - 3 strength, upto +5ohm.cm, and the compressive strength can be increased above 15MPa as well. The product can be used as an electrical earthing and magnetic shielding.

The US 504 7375 American patent description published on 11 September 1991 makes known a method for filling pigment for paper of high coating capacity, which contains enriched kaolin of iron stain and titane dioxide content produced by bubbling and magnetic separation of high intensity. During the method the foamy or magnetic waste is recovered, then dehydrated and dried. Resulting from it kaolin rich in titane dioxide is produced, which is burnt then between 1500-2200F temperature.

The US 584 3329 American patent description published on 1 December 1998 makes known a magnetic paint-, and ink additive consisting of ferromagnetic particles, preferably of iron powder - with particle size of abt. 0.01-297μm, preferably abt. 250M or bigger, preferably of the mixture of 0.01-37-44μm size particles, 6-20μm size particles are used for a latex-based realization. The beneficial additive is made by mixing the particles with a quantity of coating material, a coating material-mixture, or mixture of a coating material and alcohol sufficient for the suspension of the particles, with one of the realizations polyvinil acetate polymer is used. The additives can be mixed with any paint and ink or coating material creating magnetic paint of oil, latex or lacquer base, or with such a coating material, the viscosity of which is essentially similar to that of the paint or ink not containing particles and/or additive. The surfaces like paper, textile, wood, plywood, stone plate, foam, foam plate, sheet of veneer, plastic, fibre-board and the like coated this way, can be cut by conventional woodworking tools, scissors or knives.

The US 2003 152 731 American patent description published on 14 August 2003 makes known a coating surface receiving magnet, which consists of a layer not containing iron and another layer fixed on it, consisting of ferromagnetic particles. An adhesive layer is fixed on the layer containing no iron. The adhesive layer is covered with a plate until the other surface receiving the magnet is fixed onto another surface, for instance to a wall.

The US 2004 009 326 American patent description published on 15 January 2004 makes known an agent receiving magnet, which consists of such a plate, which has a part enclosed by two surfaces. One, or more routes go through at least one of the surfaces and the part enclosed by the surfaces. In these routes there are a determined number of magnetic particles, with size capable of going through the routes. The particles are bound to the part between the two surfaces by binding material. The deficiency of the solutions known in the state of the art is, that their vertical and horizontal load-bearing capacity is relatively small. Resulting from this they can carry light decorations, but it is not possible to fix heavier ornaments on them by magnets.

The other deficiency of the solutions known in the state of the art is, that they can not prevent properly the cracking of the surfaces they are on.

A further deficiency of the solutions known in the state of the art is, that - as they do not contain conserving agents - they have to be used right after producing them, otherwise they deteriorate.

When working out the solution according to the invention we aimed to create a magnetable plaster, which is stable, easy to spread on a wide range of solid surfaces, prevents statical cracks of the surface with good efficiency and the heavier magnetic objects for decoration remain reliably on the surface coated with a single, or maximum two layers of the plaster.

When working out the solution we realized, that in case an aqueous, acrylic-dispersion base, one-component, sealing compound flexible in a ductile way is diluted with ion- exchanged water until the required concentration of acrylic emulsion is achieved, then a conserving agent, and aqueous anti-corrosion material and additive containing magnetable iron are added, then the set aim can be achieved.

The invention is a plaster for creating magnetable decorative surfaces, said plaster consists of an aqueous, ductile bearing material, as well as a magnetable additive added to the bearing material. The plaster according to the invention is characterized by that, it consists of aqueous, acrylic-dispersion basis, one-component sealing compound, flexible in a ductile way, of 7.5 ± 0.375 mass% of ion-exchanged water, of 3 ± 0.15 mass% of conserving agent, of 1.17 ± 0.0585 mass% aqueous anti-corrosion agent, and of one or several, altogether 1.17 ± 0.0585 mass% magnetable additive of iron content, on the mass of the sealing compound considered 100%.

In one preferred embodiment of the plaster according to the invention the applied aqueous, acrylic-dispersion basis, one-component sealing compound, flexible in a ductile way is preferably 'Mester Esoallό AkriF sealing paste.

In another preferred embodiment of the plaster according to the invention the applied conserving agent is preferably citric acid, or ascorbic acid, or sodium-benzoate dissolved in ion-exchanged water.

In a further preferred embodiment of the plaster according to the invention the applied aqueous anti-corrosion agent is preferably Korro 60-90 anti-corrosion agent.

In a further preferred embodiment of the plaster according to the invention the one or several applied magnetable additive of iron content is soft-iron shot, and/or iron- pigment and/or iron-oxide powder. In a further preferred embodiment of the plaster according to the invention the mass of the soft-iron shot applied as magnetable additive of iron content is 100 ± 5 mass% on the mass of the sealing compound, and its diameter is dK).07mm-0.15mm, preferably d=0.10mm.

In a further preferred embodiment of the plaster according to the invention the mass of the iron pigment applied as magnetable additive of iron content is 10 ± 0.5 mass% on the mass of the sealing compound, and its diameter is d=0.001-0.002.

In a further preferred embodiment of the plaster according to the invention the mass of the iron-oxide powder applied as magnetable additive of iron content is 25 ± 1.25 mass% on the mass of the sealing compound, and its type is 318, or 318M, preferably 318M iron-oxide powder.

The invention is further a method for application of plaster for creating magnetable decorative surfaces, which is characterized by that, the plaster layer is spread on building construction surfaces, preferably on walls with usual surface forming technology, and there a magnetable layer of 0.05-15 mm thickness is formed.

The invention is furthermore a method for application of plaster for creating magnetable decorative surfaces, which is characterized by that, the plaster layer is spread in the thickness of 0.05-3mm on rigid plate or sheet, preferably on coating plate, or sheet, used in building industry, in given case on plasterboard, or metal, wood, paper, stone, plastic, glass sheet.

The invention is furthermore a method for application of plaster for creating magnetable decorative surfaces, which is characterized by that, the plaster layer is spread in the thickness of 0.1 -2mm between two flexible, or rigid plates or sheets and the plates or sheets are stuck together with the plaster.

In one preferred application of the method according to the invention the material of the plate or sheet applied is preferably plexi or glass and the spreading thickness applied is 0.5-lmm, preferably 0.8mm.

In another preferred application of the method according to the invention the material of the plate or sheet applied is preferably paper of one or several layers, and the spreading thickness applied is 0.2-0.5mm, preferably 0.3mm.

The plaster according to the invention is set forth on basis of the following composition formulas:

Composition 1 :

- base: 10kg aqueous, acrylic-dispersion basis, one-component, sealing compound flexible in a ductile way; - for dilution: 0.75kg ± 5 mass% ion-exchanged water (the whole quantity of ion- exchanged water for diluting the base and dissolving the conserving agent), conserving agent: 30dkg ± 5 mass% citric acid (dissolved in 0.1kg ± 5 mass% , ion-exchanged water, which is taken out of the ion-exchanged water used for dilution), anti-corrosion agent: 0.117kg ± 5 mass% aqueous anti-corrosion agent named Korro 60-90,

- additive with iron content: 13.5kg ± 5 mass% soft-iron-shot S70-S150 (d=0.07- 0.15mm)

Composition 2:

- base: 10kg aqueous, acrylic-dispersion basis, one-component, sealing compound flexible in a ductile way;

- for dilution: 0.75kg ± 5% ion-exchanged water (the whole quantity of ion- exchanged water for diluting the base and dissolving the conserving agent), conserving agent: 30dkg ± 5 mass% ascorbic acid ( dissolved in 0.1kg ± 5 mass% ion-exchanged water, which is taken out of the ion-exchanged water used for dilution), anti-corrosion agent: 0.117kg ± 5 mass% aqueous anti-corrosion agent named

Korro 60-90, additive with iron content: 13.5kg ± 5 mass% iron pigment (dK).001 -0.002mm).

Composition 3 :

- for dilution: 0.75kg ± 5% ion-exchanged water (the whole quantity of ion- exchanged water for diluting the base and dissolving the conserving agent), conserving agent: 30dkg ± 5 mass% ascorbic acid (dissolved in 0.1kg ± 5 mass% ion-exchanged water, which is taken out of the ion-exchanged water used for dilution), anti-corrosion agent: 0.117kg ± 5 mass% aqueous anti-corrosion agent named

Korro 60-90, additive with iron content: 13.5kg ± 5 mass% iron-oxide powder of 318 or 318M

Composition 4:

- for dilution: 0.75kg ± 5 mass% ion-exchanged water (the whole quantity of ion- exchanged water for diluting the base and dissolving the conserving agent), conserving agent: 30dkg ± 5 mass% citric acid ( dissolved in 0.1kg ± 5 mass% ion-exchanged water, which is taken out of the ion-exchanged water used for dilution),

- anti-corrosion agent: 0.117kg ± 5 mass% aqueous anti-corrosion agent named Korro 60-90,

- additive with iron content: 10kg ± 5 mass% soft-iron-shot S70-S150 (d=0.07- 0.15mm) and 3.5kg ± 5 mass% iron pigment (d=0.001 -0.002mm). Composition 5:

- for dilution: 0.75kg ± 5 mass% ion-exchanged water (the whole quantity of ion- exchanged water for diluting the base and dissolving the conserving agent),

- conserving agent: 30dkg ± 5 mass% ascorbic acid (dissolved in 0.1kg ± 5 mass% ion-exchanged water, which is taken out of the ion-exchanged water used for dilution),

- additive with iron content: 10kg ± 5 mass% soft-iron-shot S70-S150 (d=0.07- 0.15mm) and 3.5kg ± 5 mass% iron oxide powder marked 318 or 318M

Composition 6:

- conserving agent: 30dkg ± 5 mass% sodium-benzoate ( dissolved in 0.1kg ± 5 mass% ion-exchanged water, which is taken out of the ion-exchanged water used for dilution), anti-corrosion agent: 0.117kg ± 5mass% aqueous anti-corrosion agent named Korro 60-90,

- additive with iron content: 6.5kg ± 5 mass% iron pigment (d=0.001 -0.002mm) and 7kg ± 5 mass% iron oxide powder marked 318 or 318M

Composition 7:

- base: 10kg aqueous, acrylic-dispersion basis, one-component, sealing compound flexible in a ductile way; for dilution: 0.75kg ± 5% ion-exchanged water (the whole quantity of ion- exchanged water for diluting the base and dissolving the conserving agent), conserving agent: 30dkg ± 5 mass% citric acid ( dissolved in 0.1kg ± 5 mass% ion-exchanged water, which is taken out of the ion-exchanged water used for dilution),

- additives with iron content: 10kg ± 5 mass% soft-iron-shot S70-S150 (d=0.07- 0.15mm) and lkg ± 5 mass% iron pigment (d=0.001 -0.002mm) and 2.5kg ± 5 mass% iron oxide powder marked 318 or 318M.

Composition 8:

- for dilution: 0.75kg ± 5mass% ion-exchanged water (the whole quantity of ion- exchanged water for diluting the base and dissolving the conserving agent), - conserving agent: 30dkg ± 5 mass% ascorbic acid ( dissolved in 0.1kg ± 5 mass% ion-exchanged water, which is taken out of the ion-exchanged water used for dilution), anti-corrosion agent: 0.117kg ± 5 mass% aqueous anti-corrosion agent named Korro 60-90,

- additives with iron content: 10kg ± 5 mass% soft-iron-shot S70-S150 (d=0.07- 0.15mm) and lkg ± 5 mass% iron pigment (d=0.001-0.002mm) and 2.5kg ± 5 mass% iron oxide powder marked 318 or 318M.

Composition 9: base: 10kg aqueous, acrylic-dispersion basis, one-component, sealing compound flexible in a ductile way;

- for dilution: 0.75kg ± 5mass% ion-exchanged water (the whole quantity of ion- exchanged water for diluting the base and dissolving the conserving agent),

- conserving agent: 30dkg ± 5 mass% sodium benzoate ( dissolved in 0.1kg ± 5 mass% ion-exchanged water, which is taken out of the ion-exchanged water used for dilution),

The plaster according to the invention is furthermore set forth on basis of the following examples of realization:

Example 1

In case of a preferable concrete realization of the magnetic plaster according to the invention 10kg aqueous acrylic-dispersion basis, one-component, sealing compound flexible in a ductile way; in given case 'Mester Esδallό AkriP sealing paste is used. The aqueous acrylic-dispersion basis, one-component, sealing compound flexible in a ductile way is diluted by 0.65kg ion-exchanged water. As conserving agent 30dkg citric acid dissolved previously in 0.1kg ion-exchanged water, and 0.117kg aqueous anti-corrosion agent named Korro 60-90, as well as magnetable additives with iron content of 10kg soft-iron-shot SI lO, 1 kg iron pigment of d=0.001mm and 2.5kg iron oxide powder 318M are mixed into the acrylic emulsion created this way and is mixed in a mechanical way until the mixture becomes of uniform consistency. The mixture prepared this way is either spread instantly on the surface or in given case stored in airtight bags till the actual application.

Example 2

In case of another preferable concrete realization of the magnetic plaster according to the invention 10kg aqueous acrylic-dispersion basis, one-component, sealing compound flexible in a ductile way is used. The aqueous acrylic-dispersion basis, one-component, sealing compound flexible in a ductile way is diluted by 0.62 kg ion-exchanged water. As conserving agent 28.5dkg ascorbic acid dissolved previously in 0.1kg ion-exchanged water, and 0.112kg aqueous anti-corrosion agent named Korro 60-90, as well as magnetable additives with iron content of 9.5kg soft-iron-shot S70, 1 kg iron pigment of d=0.002mm and 2.4kg iron oxide powder 318 are mixed into the acrylic emulsion created this way and is mixed in a mechanical way until the mixture becomes of uniform consistency. The mixture prepared this way is either spread instantly on the surface or in given case stored in airtight bags till the actual application.

Example 3

In case of a further preferable concrete realization of the magnetic plaster according to the invention 10kg aqueous acrylic-dispersion basis, one-component, sealing compound flexible in a ductile way is used. The aqueous acrylic-dispersion basis, one-component, sealing compound flexible in a ductile way is diluted by 0.68kg ion-exchanged water. As conserving agent 31.5dkg sodium benzoate dissolved previously in 0.1kg ion- exchanged water, and 0.122kg aqueous anti-corrosion agent named Korro 60-90, as well as magnetable additives with iron content of 10.5kg soft-iron-shot S 150, 1 kg iron pigment of d=0.001mm and 2.6kg iron oxide powder 318 are mixed into the acrylic emulsion created this way and is mixed in a mechanical way until the mixture becomes of uniform consistency. The mixture prepared this way is either spread instantly on the surface or in given case stored in airtight bags till the actual application.

The material named 'Mester Esόallό AkriF applied in given case is an aqueous acrylic- dispersion basis, one-component, sealing compound flexible in a ductile way. It has abt. 20% higher elongation than ,,normal acrylic", therefore it has a very good efficiency in preventing cracks. It resists rain-water and different weather conditions even in its fresh state. Besides it has anti-ageing properties and it is UV-resistant as well. Due to the above it is especially recommended to use outdoors. It is white, but after set it can be painted. It sticks well on most building materials, even on porous surfaces. During the production of the plaster according to the invention - including solving of the applied conserving agent beforehand - altogether 0.75kg ± 5 mass% ion-exchanged water is used.

The material named Korro 60-90 applied in given case is an aqueous anti-corrosion agent, consisting of boric acid ester, glycol and additives.

A few possible applications of the plaster according to the invention are set forth with the help of enclosed drawings.

The Figure 1 shows a possible application of the magnetable plaster according to the invention, it shows a solid building construction surface provided with a magnetable plaster layer with magnetic decorative element placed on it, in section.

The Figure 2 shows another possible application of the magnetable plaster according to the invention, a bearing element placed with the help of a magnet on a solid building construction surface provided with magnetable plaster layer is depicted, in half-view, half-section.

The Figure 3 shows a further possible application of the magnetable plaster according to the invention, a magnet and a magnetic decorative element placed on a rigid plate provided with a magnetable plaster layer is depicted, in half-view, half-section. The Figure 4 shows a further possible application of the magnetable plaster according to the invention, a magnetable plaster layer spread between flexible or rigid plates, and a magnet and magnetic decorative element placed on the outer surface of the flexible or rigid plates is depicted in half-view, half-section.

The Figure 1 shows a possible application of the magnetable plaster according to the invention, it shows a solid building construction surface provided with a magnetable plaster layer with magnetic decorative element placed on it, in section. The magnetable plaster layer (2) is spread on the solid building construction surface (1) to be seen in the figure, and the magnetic decorative element (3) is placed on the magnetable plaster layer (2).

The Figure 2 shows another possible application of the magnetable plaster according to the invention, a bearing element placed with the help of a magnet on a solid building construction surface provided with magnetable plaster layer is depicted, in half-view, half-section. The figure shows a bearing element (5) placed with the help of one or more magnets (4) on the solid building construction surface (1) provided with magnetable plaster layer (2).

The Figure 3 shows a further possible application of the magnetable plaster according to the invention, a magnet and a magnetic decorative element placed on a rigid plate provided with a magnetable plaster layer is depicted, in half-view, half-section. The figure shows a magnet (4) and magnetic decorative element (3) placed on a rigid plate (6) provided with magnetable plaster layer (2). In this case the magnetable plaster layer (2) is spread on the rigid plate (6) and it is used as a structural element. At this realization only one side of the rigid plate (6) is provided with the magnetable plaster layer (2).

The Figure 4 shows a further possible application of the magnetable plaster according to the invention, a magnetable plaster layer spread between flexible or rigid plates, and a magnet and magnetic decorative element placed on the outer surface of the flexible or rigid plates is depicted in half-view, half-section. The figure shows the magnetable plaster layer (2) spread between the flexible or rigid sheets (7), as well as one or more magnets (4) and magnetic decorative elements (3) on the outer surface of the flexible or rigid sheets (7). The sheet (7) can be flexible or rigid, the magnetable plaster layer (2) is placed between the two sheets (7) and this way one or more magnets (4) and/or one or more magnetic decorative elements (3) can be placed on both sides of the sheet (7).

The plaster according to the invention can be spread on any solid surface — for example on metal, wood, paper, stone, plaster, plastic, plastic foam, plasterboard, glass, plexiglass - where the acrylic sticks and reticulates.

Preparing the surface before spreading is similar to the requirements of a generally known painting or coating. If the plaster according to the invention is spread on mortar, then it is not necessary to make deep foundation, because the structure of the plaster according to the invention itself makes possible the joining on the surface. Moreover the application of deep foundation definitely deteriorates the sticking of the plaster on the mortar, as during deep foundation the pores of the mortared surface are closed, so the plaster can not penetrate into the pores, so the fixing of the required decorative element becomes more difficult. The plaster according to the invention is suitable for correcting, levelling of the formerly appropriately spread mortar — as well as any other solid surface, for example on metal, wood, paper, stone, mortar, plastic, plasterboard, glass - for shaping horizontal and/or vertical loadbearing surface.

Depending on the required magnetic strength of the surface to be shaped, in given case after 20-40 minutes of the spread of the first layer a second layer can be spread as well. Obviously this way the vertical and horizontal loadbearing capacity will be bigger. The plaster can be spread in the thickness of the material particles, in case of two layers the maximum thickness of the plaster should be 1.2 mm.

Total time of drying of the spread plaster is 14-24 hours depending on the conditions - particle size, temperature, moisture, air-flow - and after this time the plaster in given case can be painted, preferably with latex paint.

The decorative objects provided with magnets can be placed on the set, dry, in given case painted plaster. Suitable size and strength magnet should be placed into or onto the surface of the required decorative objects depending on the size and weight of the objects. These magnets ensure fixing of the object to the plaster according to the invention.

The objects are fixed to the plaster either by neodymium - a rare earthmetal, an iron- boron alloy, which is magnetized and it has ten times more coercive force, than the traditional ferrite magnet - or by ferrite magnet, or by a conventional fridge-magnet. Choosing the concrete type of magnet depends on the quality, size and weight of the concrete decorative object.

A special application form of the plaster - of emulsion consistency - according to the invention is when the emulsion is spread between two paper-, plexi-, glass-, or similar solid layers. In these cases finer particle size additive of iron content is used for producing the emulsion. The products made this way become magnetable, in this case the space between the two solid layers is filled with the plaster according to the invention, then the required decorative objects provided with magnets are placed on the outer surfaces of the two material layers. The spread of the emulsion according to the invention on celluloze base paper products the paper becomes magnetable, replacing this way the steel (iron-paper) used earlier for this purpose. In this case after spreading the emulsion between the two paper layers the product achieved is tempered in such a way, that the paper layers stuck with the plaster are pressed through two warm cylinders.

The advantage of the plaster according to the invention is, that it can be used for producing magnetable surfaces with widespread use, both on building construction elements, walls and on objects having solid surface, on plates used in building or furniture industry, on plastic, glass surfaces, respectively on objects, sheets made of paper. A further advantage of the plaster according to the invention is, that the aqueous acrylic- dispersion basis, one-component, sealing compound flexible in a ductile way can prevent statical cracks of the surface spread with it with good efficiency.

Another advantage of the plaster according to the invention is, that due to the use of iron-oxide helping filling of the pores of the surface, it is more stable and easier to spread on the required surface, than the materials used in the known solutions. Besides on the surface coated with the emulsion according to the present invention - also resulting from the good pore-filling property of the iron-oxide - greater magnetic force can be achieved than in case of the already known solutions. Resulting from this a surface with better horizontal and vertical loadbearing capacity is created, that is even a heavier decorative magnetic object can reliably remain on the coated surface.

A further advantage of the plaster according to the invention - due as well to the use of iron-oxide - is, that after the drying of the plaster the flexibility and physical parameters of the surface coated with the plaster are independent of the thickness of the plaster spread.

An additional advantage of the solution according to the invention is, that the surface can be any solid material where acrylic sticks and can set: for example metal, wood, paper, stone, mortar, plastic, plastic foam, plasterboard, glass.

A further advantage of the solution according to the invention — due as well to the use of iron-oxide — is, that after the drying of the plaster spread on the surface the flexibility and physical parameters of the ready-made surface coated with the plaster are independent of the thickness of the plaster spread.

The advantage of the solution according to the invention is moreover, that in case the emulsion according to the invention is spread on mortar, then no deep foundation is required.

Furthermore the advantage of the solution according to the invention is, that fixing of required objects on the surface can be carried out with a wider range of magnets than before, namely with ferrite-magnet, neodymium or with traditional fridge-magnets as well.

A further advantage of the solution according to the invention is, that due to the citric acid, ascorbic acid or sodium-benzoate used as conserving agents the 'use by' date of the ready emulsion is extended to three years.

Besides the advantage of the solution according to the invention is, that the ion_τ exchanged water used for making the emulsion increases the purity and durability of the mixed emulsion.

A further advantage of the solution according to the invention is, that the material thanks to its structure is decorative in itself, can be better formed, for example it can be spread in a shell shape.

Claims

CLAIMS:

1. Plaster for creating magnetable decorative surfaces, said plaster consists of an aqueous, ductile bearing material, as well as a magnetable additive added to the bearing material, characterized by that, the plaster consists of aqueous, acrylic-dispersion basis, one-component sealing compound, flexible in a ductile way, of 7.5 ± 0.375 mass% of ion-exchanged water, of 3 ± 0.15 mass% of conserving agent, of 1.17 ± 0.0585 mass% aqueous anti-corrosion agent, and of one or several, altogether 1.17 ± 0.0585 mass% magnetable additive of iron content, on the mass of the sealing compound considered 100%.

2. Plaster according to claim 1 characterized by that, the applied aqueous, acrylic- dispersion basis, one-component sealing compound, flexible in a ductile way is preferably 'Mester Esόallό Akril' sealing paste.

3. Plaster according to claim 1 or 2 characterized by that, the applied conserving agent is preferably citric acid, or ascorbic acid, or sodium-benzoate dissolved in ion- exchanged water.

4. Plaster according to any of claims 1-3 characterized by that, the applied aqueous anti-corrosion agent is preferably Korro 60-90 anti-corrosion agent.

5. Plaster according to any of claims 1-4 characterized by that, the one or several applied magnetable additive of iron content is soft-iron shot, and/or iron-pigment and/or iron-oxide powder.

6. Plaster according to any of claims 1-5 characterized by that, the mass of the soft-iron shot applied as magnetable additive of iron content is 100 ± 5 mass% on the mass of the sealing compound, and its diameter is d=0.07mm-0.15mm, preferably d=0.10mm.

7. Plaster according to any of claims 1-6 characterized by that, the mass of the iron pigment applied as magnetable additive of iron content is 10 ± 0.5 mass% on the mass of the sealing compound, and its diameter is d=0.001-0.002.

8. Plaster according to any of claims 1-7 characterized by that, the mass of the iron- oxide powder applied as magnetable additive of iron content is 25 ± 1.25 mass% on the mass of the sealing compound, and its type is 318, or 318M, preferably 318M iron-oxide powder.

9. Method for application of plaster for creating magnetable decorative surfaces, characterized by that, the plaster layer (2) is spread on building construction surfaces (1), preferably on walls with usual surface forming technology, and there a magnetable layer of 0.05-15 mm thickness is formed.

10. Method for application of plaster for creating magnetable decorative surfaces, characterized by that, the plaster layer (2) is spread in the thickness of 0.05-3mm on rigid plate (6) or sheet (7), preferably on coating plate (6), or sheet (7), used in building industry, in given case on plasterboard, or metal, wood, paper, stone, plastic, glass sheet.

11. Method for application of plaster for creating magnetable decorative surfaces, characterized by that, the plaster layer (2) is spread in the thickness of 0.1 -2mm between two flexible, or rigid plates (6) or sheets (7) and the plates (6) or sheets (7) are stuck together with the plaster.

12. Method according to claim 11, characterized by that, the material of the plate (6) or sheet (7) applied is preferably plexi or glass and the spreading thickness applied is 0.5- lmm, preferably 0.8mm.

13. Method according to claim 11, characterized by that, the material of the plate (6) or sheet (7) applied is preferably paper of one or several layers, and the spreading thickness applied is 0.2-0.5mm, preferably 0.3mm.