Method of producing composite laminar material (versions)

FIELD: process engineering.

SUBSTANCE: invention relates to production of glued laminates. Proposed method consists in gluing together consecutive layer. Glue or adhesive is applied on first layer surface for, at least, one next layer to be glued thereon and coated by second surface layer. Pressure is applied to the latter and layers of glue or adhesive are dried unless their polymerisation. Mesh of web of fiber glass is applied on the first surface layer after application of glue or adhesive. Inner layer is composed of placing the ring- or cylinder-shape bamboo fragments on said web or mesh the fragments. Then, layer of glue or adhesive is applied thereon and covered by another mesh or wed of fiber glass for attachment of second surface layer.

EFFECT: higher efficiency.

4 cl, 7 dwg

 

The invention relates to the production of glued laminated constructions and can be used for manufacturing small wall materials, small prefabricated structures, structural members and the designs themselves, as well as items of flooring and roof, suspended or false ceilings, joinery and furniture boards.

The invention regards a method of obtaining a composite laminate or a sandwich construction in which the term "composite" refers to the so-called composite material or composite artificially created heterogeneous solid material consisting of two or more components with different physical and chemical properties which remain separate on a macroscopic level within the finished structure. Mechanical behavior of the composite is determined by the ratio of the properties of the reinforcing elements and the matrix (only the value of the binder in the composite material), as well as the bonding strength between them. The effectiveness and efficiency of the material is dependent on the correct choice of initial components and technologies combine to ensure a strong bond between the components while maintaining their original characteristics.

On the modern market of composite materials there is a need for light is, durable warm panels containing organic materials, contributing to the rapid erection of structures for any purpose, including buildings, furniture, floors for example. In this regard, the panel made from natural bamboo, considered as an alternative business wood. Manufacturers quickly realized the hardness of bamboo (the indicator on Brinnell - 4,5-4,8), resistance to moisture and point loads. Bamboo is not a tree, and growing high herbaceous plant with small thickness of the hollow stem. If we compare the robustness of two rods of the same cross-section of wood and bamboo, you can be sure that the bamboo about two times more durable and flexible. For a long time these features were used in the manufacture of various products. The use of bamboo in the form of replacement of wood reduces the weight of solid wood and composite materialov based on wood by about 40%, reaching densities of up to 250 kg/m3, and can significantly reduce such layered materials internal stress, often leading to deformation of the panels in violation of the technology or the impact of load and atmospheric conditions.

A known method of manufacturing a composite laminate, which consists in the successive bonding of the layers to one another through nanese the Oia on the first surface a layer of glue or adhesive, imposing on him the following at least one layer which is the inner layer, which put a layer of glue or adhesive and cover the top of the second surface layer with application of pressure over the entire surface of the latter and drying layers of glue or adhesive prior to their polymerization (AU 2011213905, AS 2/10, AS 2/24, publ. 22.03.12).

This decision was made as a prototype for all of the stated objects.

The disadvantage of the prototype, as well as all known solutions related to the manufacture of laminates, is that originally laid that merge layers should be prepared as the size of area and thickness (for example, by milling), so that all the layers were pre-adjusted for flatness and thickness. In this case, a simple overlay each other with glue made the panel a predetermined thickness equal to the sum of the thicknesses of the bonding layer (plus the thickness of the adhesive promatch). In this regard, in panels, where bamboo is used, its fragments are processed and made of him a plate or panel, in which colledani conditions flatness and sustained its thickness. Such layers or plates used as veneer for the exterior of the composite or of fragments of bamboo pressed plate to be embedded in an inner layer in the composite. In any is the best known methods for producing composites with addition of a bamboo always imply the existence of preparatory operations for layers which then will stick together. An example of this, parquet surface layer of veneer bamboo or panel with an inner filler in the form of pressed pieces of bamboo.

Using the known methods fail to reduce the weight of the composite with increasing it layers while increasing the strength of the bearing capacity of such a layered material.

In the known practice, you can rely on the attempt to reduce the weight of three-ply composite made up of the outer layers and placed between the reinforced inner layer, made of pieces of bamboo in the form of cylinders or cardboard or plastic between the layers of the inner filler placed layers of sheet material in the form of panels of bamboo, plywood, cardboard or paper, and between the layers of sheet material and the honeycomb cells in the form of a cylinder of bamboo placed reinforcing fiberglass mesh or plastic or metal and put layers of glue or adhesive bonding sheet material from rolls of bamboo, cardboard or plastic (RU # 103548, AS 2/00, publ. 20.04.2011). However, in this panel fragments of bamboo in layered composite are used as filler space between the two surface layers which have the function of forming a predetermined thickness of the panel and investment in the su this product. In this regard, as a placeholder and shaper cell design uses cylinders of bamboo. With such design and to compliance with requirements, monitoring the thickness and flatness of the upper surface of the layer towards the bottom it is necessary to strictly comply with the condition, according to which the cylinders of bamboo must have the same height despite the fact that the surface on which they are placed must be aligned. If these conditions are sufficient complexity can be performed for a three-layer design, with increasing layer cellular layer, the alignment process becomes complicated and becomes directly dependent on the dimensions of the cylinders of bamboo. The task of continuously monitoring the flatness of the position of each subsequent layer in the known patent solved through the use of mesh, including plastic and metal. This indicates that these grids are hard and do not change their spatial shape. Due to this and due to the conduction between the layers of adhesive are aligned overlay surface against the tiled layer. But the introduction of metal mesh affects the weight of the product and does not allow the finished product to cut and fit on site. In addition, the presence of the panels in the internal structure as load-bearing elements between on what anitalaj increases the weight of the product.

The present invention is directed to the achievement of the technical result consists in simplifying the manufacture of composites with fragments of bamboo while providing reduced weight by increasing the number of internal layers in the composite layered material in relation to the prototype.

This technical result for the first variant execution is achieved in that in the method of manufacturing a composite laminate, which consists in the successive bonding of the layers to one another by applying to the first surface a layer of glue or adhesive, imposing on him the following at least one layer which is the inner layer, which put a layer of glue or adhesive and cover the top of the second surface layer with application of pressure over the entire surface of the latter and drying layers of glue or adhesive prior to their polymerization, after applying a layer of glue or adhesive on the first surface layer stack a mesh or fabric of glass fiber, the inner layer formed by the pickup on the net or the cloth from fiberglass fragments of bamboo in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem, and then put a layer of glue or adhesive is closed on top of the other mesh or cloth made of glass fiber for subsequent attachment of the second surface layer.

This technical result for the second type of performance is achieved in that in the method of manufacturing a composite laminate, which consists in the successive bonding of the layers to one another by applying to the first surface a layer of glue or adhesive, imposing on him the following at least one layer which is the inner layer, which put a layer of glue or adhesive and cover the top of the second surface layer with application of pressure over the entire surface of the latter and drying layers of glue or adhesive prior to their polymerization, characterized in that after applying a layer of glue or adhesive on the first surface layer stack a grid or canvas from fiberglass inner layer is formed by laying on the mesh or fabric of glass fiber in the form of a first layer of fragments of bamboo in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem, and then put a layer of glue or adhesive and cover top of another mesh or cloth made of glass, on which is applied a layer of glue or adhesive to form at least one next layer of these fragments of bamboo, which after applying a layer of glue or adhesive to close the top other mesh or cloth made of glass fiber for subsequent attachment of the second surface layer.

This technical result for the third variant is achieved in that in the method of manufacturing a composite laminate, which consists in the successive bonding of the layers to one another by applying to the first surface a layer of glue or adhesive, imposing on him at least one layer which is the inner layer, which put a layer of glue or adhesive and cover the top of the second surface layer with application of pressure over the entire surface of the latter and drying layers of glue or adhesive prior to their polymerization, characterized in that the surface layers use a mesh or fabric of glass fiber, and the inner layer is formed by the pickup on the net or the cloth from fiberglass fragments of bamboo in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem, followed by the application of these sections of the layer of glue or adhesive to attach the second surface of the layer.

This technical result for the fourth variant is achieved in that in the method of manufacturing a composite laminate, which consists in the successive bonding of the layers to one another by applying n the first superficial layer of glue or adhesive, imposing on him the first inner layer, which is put a layer of glue or adhesive and are laid on top of the second inner layer, which put a layer of glue and adhesive to at least one of the next inner layer before forming unit parallelepipedal or cubic shape, which put a layer of glue or adhesive to attach the second surface layer with application of pressure over the entire surface of the latter and drying layers of glue or adhesive prior to their polymerization, characterized in that the surface layers use a mesh or fabric of glass fiber between each surface and located adjacent the inner layer and between every adjacent spaced inner layers are placed mesh or cloth from fiberglass with adhesive or abrasive, and each inner layer is formed by laying on a grid or a canvas of glass fragments of bamboo in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem.

These characteristics are essential and interrelated with the formation of a stable set of essential features, sufficient to obtain the desired technical result.

Present from Britanie illustrated with specific examples of implementation, which, however, are not only possible, but clearly demonstrate the possibility of achieving the desired technical result.

Figure 1 is a first example of execution of the method;

figure 2 - composite material obtained by the method of figure 1;

figure 3 is a second example of execution of the method;

4 is a composite material obtained by the method according to figure 3;

5 is a third example of the execution of the method;

6 is a composite material obtained by the method according to figure 5;

Fig.7 is an example of the execution of the composite material.

According to the present invention discusses how the production of laminated composite materials that can be used for the manufacture of panels or structural elements of the broad purposes. Feature of the composite material is its low weight with high strength properties and high load bearing capacity, which is due to the fact that as the source material is natural bamboo, which is in the form of fragments (a separate part in the form of rings, cylinders, plates of walls) fills the cavity of the panel. Fragments of bamboo well withstand high loads as along the fiber and across the grain.

A method of manufacturing a composite laminate is consistent bonding of the layers to one another through the Yesenia on the first surface layer 1 of glue or adhesive 2 (as a layer), imposing on him the following at least one layer which is the inner layer, which put a layer of glue or adhesive 2 and close the top of the second surface layer 3 with the application of pressure P over the entire surface of the latter and drying layers of glue or adhesive prior to their polymerization. In this respect, the method follows the well-known techniques used in the production of laminated panels, as is the case in the prototype.

In the method according to the present invention as a surface layer using a mesh or fabric of glass fiber, and the inner layer is formed by laying on a grid or a canvas of glass fragments 4 bamboo in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem, followed by the application of these sections of the layer of glue or adhesive to attach the second surface of the layer.

Thus, the new panel is obtained by placing and fastening between two layers of flexible mesh or fabric, made of fiberglass. Forming flatness is realized by application of the desired pressure (press) on the entire surface of the formed panel, in which the top is located a grid or webs adjacent in h the values of the fragments of bamboo or under pressure or because of sagging. Thus, all the pieces of bamboo are coupling with two layers of mesh or cloth. This panel is the base for forming decorative panels, that is equipped with outer layers that are adhered to the layers of mesh or cloth in places of contact with them (cavity, which does not contact, be filled with glue or adhesive and form a zone of increased adhesive substance, creating a drying support under the outer decorative layers).

In the method according to the present invention to obtain a panel with external dekorativnye or reinforcing layers 5 after applying a layer of glue or adhesive on the first surface layer stack a mesh or fabric of glass fiber, the inner layer is formed by laying on a grid or a canvas of glass fragments of bamboo in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem, and then put a layer of glue or adhesive and cover top of another mesh or cloth made of glass fiber for subsequent attachment of the second surface layer.

Obtained by the described method composite layered material has a multilayer structure and in the example shown in Fig., consists of three layers: two outer layers 4, which is the surface and reinforcing, and one internal layer is made in the form of a cellular honeycomb structure from fragments of bamboo in the form of rings or cylinders 1, obtained by cutting transversely of bamboo stalks, or in the form of plates 2 or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem. For this example, execution, and for all subsequent examples of execution, regardless of the number of layers for reinforcing the cell of the honeycomb structure used fiberglass mesh or cloth from fiberglass. Cellular honeycomb structure placed on a grid or a canvas on which is deposited a layer of glue or adhesive, and the top is closed the other mesh or canvas, on whose side facing the cell of the honeycomb structure as a layer of glue or adhesive. Thus, in the example of figure 2 the outer layers 4 made of fibreglass mesh or fabric of glass fiber are both reinforcing layers.

As a glue or adhesive applied adhesives that are typically used in the production of parquet boards or gluing veneer on the furniture surface. Due to the variety of such tools in the framework of this proposal, specification of the type of glue or adhesive is not performed. More detail is such adhesive and adhesive compositions described in the article "Glue-all" (http://eurostil.su/klei_na_vse_sluchai).

Such a composite material is a panel of a given size, internal structure, made from pieces of bamboo, determines the mechanical properties of this product. The panel accepts the load in the direction coinciding with the direction of bamboo fiber and across the fibers, and this just loads transverse to the panel that allows this panel to consider as a building sheet of layered material with high load capacity. This panel has a reduced weight, which is determined, in fact, the weight of the bamboo (bamboo has a low density of about 500 kg/m3, the weight of the glass fiber mesh - 135 grams per square meter, and the weight of the cloth from fiberglass - 473 grams per square meter). As the mesh or fabric of glass fiber, having the flexibility to interact with glue or binder, is practically not exposed to aggressive environments and is not elastic, then after drying or polymerization of adhesive is consolidation of the entire layered structure.

The mechanical properties, i.e. the carrying capacity of the panel of composite material can fold increase in almost a slight increase in weight due to the increased number of cell layers of the structure. For the formation of two layers of a first form pan is l, as described with respect to the product of figure 2, and then form the second layer. In the second layer of mesh or canvas covering fragments of bamboo in the first layer, cover with a layer of glue or adhesive. Then pieces of bamboo are placed on a grid or canvas covering fragments of bamboo in the first layer, and the top cover additional mesh or canvas, the back side of which bears a layer of glue or adhesive. Similarly, you can increase the number of layers. After sealing under pressure and polymerization of the binder components panel with two or more internal layers becomes monolithic design.

In such multilayer panels layers with fragments of bamboo can be located by matching the direction of their fibers, or in the same layer slices of bamboo can be located with the direction of their fibers, different from the direction of the grain fragments of bamboo in another layer or other layers (Fig.7). While the inner layer is at least some fragments of bamboo can be located with the direction of their fibers, different from the direction of the fibers of the other parts of fragments of bamboo in this layer (illustrative example not shown).

When increasing the number of homogeneous layers described with reference to the example in figure 1, we can ensure that the material will take the form of a composite unit in the form of the e parallelepiped or a cube (6). These blocks are convenient, as they allow then use the saw to saw it on a separate panel in any direction of the block. For the formation of the block is formed from a first basic three-layer fragment: honeycomb mesh design from pieces of bamboo are placed on a mesh or fabric of glass fibers and from above close to another of the same mesh or fabric, and each following layer slices of bamboo are placed on a grid or canvas covering fragments of bamboo in the previous layer, and the top cover additional mesh or canvas for the formation of the composite block. This illustrative method shown in figure 5. Each operation of this method iterates of the method of figure 1. Naturally, bond grids or panels of fragments of bamboo carry out at the expense of glue or adhesive, which is in the form of a layer applied to the grid or canvas.

The feature of using flexible mesh or flexible non-woven cloth made of glass fibers, is that when polymerization of the glue or adhesive mesh is laid on a layer of slices of bamboo and eliminates uneven cell structure.

The use of mesh or nonwoven fabric of glass fiber helps to ensure breathability as a separate sandwich panel, sandwich panels, and a building block of such layers. This allows the returns vented on the one hand, and sound and sound design with the other hand. Noise and soundproofing provided that the sound waves. Ponika into the internal structure of the panel are in a large number of chambers or cavities and are crushed and extinguished. In this panel there is no resonance effect.

Cellular cellular structures can be used as fragments of bamboo portion in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem. While variations of the location of these fragments in the cell of the honeycomb structures are diverse. For example, the second inner layer slices of bamboo in the form of rings or cylinders can be arranged with an offset from the fragments of bamboo in the form of rings or cylinders in the first inner layer. In the inner layer the slices of bamboo in the form of rings or cylinders can be arranged adjacent to each other by walls or located relative to each other with a gap between the walls. Or in the inner layer at least part of the fragments of bamboo in the form of rings or cylinders are adjacent to each other by walls.

Possible variant, according to which the middle layer may be made of cylinders of bamboo is about the principle of "one another", i.e. smaller than the other. In the cylinder or ring of bamboo is inserted into the same cylinder or ring of bamboo, but of smaller diameter. This option allows the cylinders (rings) bamboo large diameter, it is easier to choose" volume products. And to increase the strength inside of this cylinder is inserted small. In this embodiment, the arrangement of the cylinders in the middle layer can be as orderly and chaotic.

The proposed design of the building and finishing of composite material allows to obtain panels of any thickness and design and low weight, while the structure becomes rigid enough for use as bearing plates, obespechivaushyi protect the interior from temperature fluctuations and external noise, and thereby improve heat and sound insulation.

Specialist in the art should be obvious that the present invention there are a variety of modifications and changes. Accordingly, it is assumed that the present invention covers these modifications and changes, and equivalents without departure from the essence and scope of the invention disclosed in the accompanying claims.

1. A method of manufacturing a composite laminate, which consists in the successive bonding of the layers to one another at the expense of grease is on the first surface a layer of glue or adhesive, imposing on him the following at least one layer which is the inner layer, which put a layer of glue or adhesive and cover the top of the second surface layer with application of pressure over the entire surface of the latter and drying layers of glue or adhesive prior to their polymerization, characterized in that after applying a layer of glue or adhesive on the first surface layer stack a mesh or fabric of glass fiber, the inner layer is formed by laying on a grid or a canvas of glass fragments of bamboo in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem, and then put a layer of glue or adhesive and cover top of another mesh or cloth made of glass fiber for subsequent attachment of the second surface layer.

2. A method of manufacturing a composite laminate, which consists in the successive bonding of the layers to one another by applying to the first surface a layer of glue or adhesive, imposing on him the following at least one layer which is the inner layer, which put a layer of glue or adhesive and cover the top of the second surface layer with application of pressure over the entire surface of poslednego and drying layers of glue or adhesive prior to their polymerization, characterized in that after applying a layer of glue or adhesive on the first surface layer stack a mesh or fabric of glass fiber, the inner layer is formed by laying on the mesh or fabric of glass fiber in the form of a first layer of fragments of bamboo in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem, and then put a layer of glue or adhesive and cover top of another mesh or cloth made of glass, on which is applied a layer of glue or adhesive to form at least one of the next layer of these fragments of bamboo, which after applying a layer of glue or adhesive cover on top of the other mesh or cloth made of glass fiber for subsequent attachment of the second surface layer.

3. A method of manufacturing a composite laminate, which consists in the successive bonding of the layers to one another by applying to the first surface a layer of glue or adhesive, imposing on him at least one layer which is the inner layer, which put a layer of glue or adhesive and cover the top of the second surface layer with application of pressure over the entire surface of the latter and drying layers of glue or adhesive to their p is liberizatsii, characterized in that the surface layers use a mesh or fabric of glass fiber, and the inner layer is formed by laying on a grid or a canvas of glass fragments of bamboo in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem, followed by the application of these sections of the layer of glue or adhesive to attach the second surface of the layer.

4. A method of manufacturing a composite laminate, which consists in the successive bonding of the layers to one another by applying to the first surface a layer of glue or adhesive, imposing on him the first inner layer, which is put a layer of glue or adhesive and are laid on top of the second inner layer, which put a layer of glue and adhesive to at least one of the next inner layer before forming unit parallelepipedal or cubic shape, which put a layer of glue or adhesive to attach the second surface layer with application of pressure over the entire surface of the latter and drying layers of glue or adhesive prior to their polymerization, characterized in that as the surface layers use a mesh or fabric of glass fiber between each paragraph the surface layer and located adjacent the inner layer and between each adjacent spaced inner layers are placed mesh or cloth from fiberglass with adhesive or abrasive, and each inner layer is formed by laying on a grid or a canvas of glass fragments of bamboo in the form of rings or cylinders, obtained by cutting transversely of bamboo stalks, or in the form of wafers or chips from the walls of bamboo, obtained by cutting the stalk of the bamboo along the walls and across the stem.



 

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EFFECT: simple and efficiency process.

6 cl

FIELD: chemistry.

SUBSTANCE: present invention relates to a resin used in coating and/or making shaped articles, which contains a hydroxy-aromatic compound of formula (VIII)

, where R1 R2, R4 and R5 denote H, C1-12 alkyl group, EWG denotes COOC1-12 alkyl group, which is obtained by reacting a hydroxy-aromatic compound of formula (IV) with a compound of formula (VI), if needed, in the presence of a catalyst, formula (IV), representing: , where R1 R2, R4, R3 and R5 denote H, C1-12 alkyl group, and formula (VI): , where R6 and R12 denote C1-12 alkyl group.

EFFECT: invention relates to a method of producing a hydroxy-aromatic resin, use thereof in coatings and making shaped articles, as well as a coating and shaped article containing the hydroxy-aromatic resin.

7 cl, 2 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: composition contains a polymer which contains hydroxyl groups, a polyfunctional cross-linking gent and, optionally, a catalyst. The polymer which contains hydroxyl groups is a polyvinyl alcohol or a mixture of starch and polyvinyl alcohol. The polyvinyl alcohol is hydrolysed. The polyfunctional cross-linking agent is substituted glycosal and is present in concentration of at least 25 wt %. The catalyst is selected from a group comprising ammonium chloride, ammonium sulphate, phosphoric acid, p-toluic acid and mixtures thereof. The composition is used as binder for producing a composite product. The composite product is obtained by depositing a curable aqueous composition onto lignocellulosic materials and then hardening the said composition. Lignocarbohydrate material is plywood, plywood, fibrous wood chipboard, medium-density fiberboard and a board with oriented fibres.

EFFECT: curable aqueous composition contains a large amount of non-volatile substances, is stable, hardens quickly and does not release any poisonous gases during solidification.

11 cl, 2 tbl, 13 ex

The invention relates to the production of glulam structures and can be used for manufacturing small wall materials, small prefabricated structures, structural members and the designs themselves, as well as items of flooring and roof, suspended or false ceilings, joinery and furniture boards

The invention relates to chemical technology, in particular to the field of plastics

The invention relates to the production of sheet structural materials for buildings acoustic systems

The invention relates to a process for the manufacture of wood-based composite materials (DCM) and can be used in the manufacture of structural, thermal, acoustic and decorative facing materials for engineering, industrial and residential construction, furniture, packaging and other consumer goods

FIELD: chemistry.

SUBSTANCE: composition contains a polymer which contains hydroxyl groups, a polyfunctional cross-linking gent and, optionally, a catalyst. The polymer which contains hydroxyl groups is a polyvinyl alcohol or a mixture of starch and polyvinyl alcohol. The polyvinyl alcohol is hydrolysed. The polyfunctional cross-linking agent is substituted glycosal and is present in concentration of at least 25 wt %. The catalyst is selected from a group comprising ammonium chloride, ammonium sulphate, phosphoric acid, p-toluic acid and mixtures thereof. The composition is used as binder for producing a composite product. The composite product is obtained by depositing a curable aqueous composition onto lignocellulosic materials and then hardening the said composition. Lignocarbohydrate material is plywood, plywood, fibrous wood chipboard, medium-density fiberboard and a board with oriented fibres.

EFFECT: curable aqueous composition contains a large amount of non-volatile substances, is stable, hardens quickly and does not release any poisonous gases during solidification.

11 cl, 2 tbl, 13 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a resin used in coating and/or making shaped articles, which contains a hydroxy-aromatic compound of formula (VIII)

, where R1 R2, R4 and R5 denote H, C1-12 alkyl group, EWG denotes COOC1-12 alkyl group, which is obtained by reacting a hydroxy-aromatic compound of formula (IV) with a compound of formula (VI), if needed, in the presence of a catalyst, formula (IV), representing: , where R1 R2, R4, R3 and R5 denote H, C1-12 alkyl group, and formula (VI): , where R6 and R12 denote C1-12 alkyl group.

EFFECT: invention relates to a method of producing a hydroxy-aromatic resin, use thereof in coatings and making shaped articles, as well as a coating and shaped article containing the hydroxy-aromatic resin.

7 cl, 2 dwg, 1 ex

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