Method and system to seal special wood substrate edges

FIELD: process engineering.

SUBSTANCE: invention relates to woodwork, particularly, to production of oriented chip boards that feature higher swelling resistance and better look-down. Wood substrate edges are protected by applying two-component sealing composition on at least the surface of one edge. First component comprises coagulant while second component comprises aqueous composition of edge sealant. Invention covers also system for sealing of edges and substrate by coating with described composition.

EFFECT: better coating properties to improve water resistance.

31 cl, 5 dwg, 6 tbl, 10 ex

 

The technical FIELD

The present invention relates to a method that can be used in the production of specialized wood products, such as, for example, oriented strand Board (OS-plate) with high resistance to swelling and improved appearance.

BACKGROUND of INVENTION

Specialized products of wood, such as oriented strand Board, fibreboard and glued products from veneer, widely used in housing construction and construction of commercial and popular in industrial materials processing and manufacturing of upholstered furniture. These products are available in a variety of forms, such as panels of oriented strand boards, fibreboard medium density products laminated veneer etc.

Specialized products from wood are usually made of small fragments of wood and adhesives, curable when heated. Oriented strand Board is made from adhesives, curable when heated, and rectangular Strahov (chips), which are mutually perpendicular layers. They are usually positioned as specialized structural panel and are used for covering roofs, walls and floorings is ri the construction of houses. The production process allows manufacturers plates to give them new properties, such as texture, reducing the possibility of slippage for panels intended for covering roofs, and can be supplied metric panels and panels of large size.

Under the influence of moisture specialized products of wood, such as panels of OS-plates, are subjected to irreversible swelling in thickness. The most frustrating this swelling appears at the edges of the panel. For specialized panels of wood is characterized by the greatest swelling in the center of the edges exposed to moisture. For example, OS-plate, having a thickness of 720 mils (determined as 0.720 inch/1,829 cm) can really swell at the edges to a thickness in excess of 1000 mils (1 inch/2.54 cm). After drying the thickness of these plates is not recovered and may be about 900 mils (2.3 cm).

There are solutions to the problem of swelling of the edges. Most manufacturers of specialized products from wood, such as, for example, OS-plate, trying to improve the stability of the plates to deformation by applying a sealant compositions, such as the coating of paint on all four edges of the OS-plate. Usually the sealing material after drying becomes hydrophobic film that sticks to the OS-plate and reduces the absorption of water at the edges. So about the time, the sealing material may reduce the degree of swelling of the edges, when the plate is subjected to the action of moisture.

The sealing material is usually applied to the edge of the specialized products of wood at the place of production of such products. Standard practice for liquid sealing composition is applied to the plate soon after the production of plates. Typically, the composition dries quickly once applied on the plate without the use of heating or ventilating devices. Applying sealants is already the industry standard because it represents the aesthetic value for overall marketing and provides improved characteristics, which consists in protecting the panels from moisture and rain when building a house.

Most of the sealant compositions painted, and their application will give a specialized product from solid wood, finished and attractive appearance. After the sealant is applied on the edge of a specialized product from wood and dried, it provides a reduction in the degree of swelling, which usually occurs when the product is exposed to the water. Thus, the sealant must be dried to form a film that adheres to the product of the tree and is relatively elastic to be stretched when rabbu is assured product from the tree.

There is a need for improved methods of protection specialized products of wood, in particular their surfaces and edges that may be exposed to the environment, e.g. water, in the process of delivery of goods to the customers.

The INVENTION

In the present invention proposes a method of protecting the edges of specialized products from wood. The method comprises applying a two-component composition of the sealing edges, in which the first component contains a coagulant, and the second component contains the aqueous composition of the sealing edges caused by at least one edge of a wood substrate (product). In one of the embodiments of the invention the first and second components may be applied to the substrate sequentially. The method provides improved resistance to swelling and increased durability and resistance to deformation of the edges of specialized products of wood when exposed to water. The use of the invention also enables you to provide excellent hiding power of the coating and smooth surface, which may initially be rough and porous, giving it a more attractive appearance. The method can provide a film that does not stick and is not glued.

In another embodiment of the invention the first and the second component is mixed with the dispersion to be applied on the surface of the substrate or directly during application. Mixing of two-component system to be applied on the surface of the substrate can reduce the required amount of the composition of the sealing edges. The method can provide a film that does not stick and is not glued.

In another embodiment, the invention features a system for sealing edges for specialized wood substrate, in which a sealing system contains a two-component sealant composition for coating the edges of specialized products from wood. The edges of the sealing system includes a first component, which includes the coagulant, and the second component, which includes water composition sealing the edges. The edges of the sealing system can be applied, as described above, and provides a film which is not sticky and not glued.

In another embodiment, the invention is a two-component system, which uses the components are mixed at the spray to be applied on the surface of the substrate can increase efficiency and improve performance of the composition of the sealing edges. Two-component system sealing edges can provide a film that does not stick and is not glued.

In another embodiment, the invention provides products which are manufactured from specialized is consistent product from a tree, and at least one edge of the substrate caused two component system for sealing the edges. Two-component system sealing edges contains the first component, which includes the coagulant, and the second component, which includes water composition sealing the edges. The edges of the sealing system includes one or more compositions of the coatings applied to at least one edge of the product.

The above brief description of the invention is not intended to review each open or possible variants of implementation of the present invention. Other characteristics and advantages of the invention will become clear from the description and drawings and from the claims. In the following description in more detail the options that illustrate the invention. In some places the descriptions in the list of examples given instructions as to what examples can be used in various combinations. In each case, the specified list is a group of typical options and should not be construed as the only possible list.

The details of one or more embodiments of the invention shown in the accompanying drawings and discussed in the description.

BRIEF DESCRIPTION of DRAWINGS

Figure 1 - illustration of improved characteristics in respect razboieni the OS-plate thickness 23/32 inch coated edges when applying the pre-treatment composition in accordance with the invention prior to application of the primary coating.

Figure 2 - illustration of improved characteristics in respect swelling OS-plate thickness of 7/16 inch coated edges when applying the pre-treatment composition in accordance with the invention prior to application of the primary coating.

Figure 3 - illustration of improved characteristics in respect swelling OS-plate thickness of 7/16 inch coated edges when applying the pre-treatment composition in accordance with the invention prior to application of the primary coating.

4 is a view of the hydrophobic composition of the coating near the surface of the test edges ("apron") on the perimeter of the test panels.

5 is a view of the test panels are placed in a large tub when testing the swelling of the edges.

DETAILED description of the INVENTION

The terms "preferred" and "preferably" refer to variants of the invention, which under certain conditions can have certain advantages. However, when the same or other conditions preferred can be other options. In addition, an indication of one or more preferred embodiments of the invention does not mean that can not be used and other options, then there are other options not excluded from the scope of the invention.

The defining characteristics in the singular or indicate"at least one" and "one or more" are used interchangeably. Thus, for example, an indication of the composition of the coating containing the "Amin", can be interpreted as an indication that the composition contains one or more amines.

The terms "latex polymer resin", "latex resin", "latex emulsion" or "latex" refers to a dispersion of polymer particles in water and are interchangeable. Latex polymer resins typically contain one or more dispersing components (e.g., surfactant) to create a dispersion or emulsion of polymer particles in water.

The numeric ranges boundary values includes all numbers included in this range (for example, range 1-5 includes 1; 1,5; 2, 2,75; 3; 3,80; 4; 5 etc).

In the present invention proposes a method of protecting the edges of specialized products from wood, which includes applying a two-component protective coating composition on at least one edge of the substrate, and the first component contains a coagulant, and the second component contains water composition, sealing the edges. In another embodiment of the invention the first component may contain a filler.

The present invention also proposes a system for sealing the edges to the substrate, such as a specialized product from wood. The sealing system preferably contains the first components is t, which includes a coagulant, and the second component, which includes water composition sealing the edges. The sealing system includes one or more layers of two-component composition sealing the edges caused by at least one edge of the substrate. In case of applying different layers of coating composition for each layer may be the same or they may vary. Disclosed in the description of the sealing system is particularly suitable for coating the edges of the specialized products of wood, such as, for example, OS-plate.

Without going into theory, it should be noted that the first component of a two-component sealing system can improve the performance of the composition sealing the edges by slowing down its absorption into the fibers of the wood or improve coagulation of the composition of the sealing edges on the surface of the substrate, which minimizes the penetration of the composition of the coating into the substrate. Minimizing the penetration of the coating composition into the porous fibers of the wood allows for a uniform dry film and, accordingly, more attractive appearance. When used on the edges of the specialized product made of wood, such as OS-plate, marked excellent durability edges to the swelling.

In one of the embodiments of the invention the first comp the element composition contains a coagulant or a occulant. The term "coagulant", "coagulating agent", "occulant" or "flockhouse reagent are vzaimozavisimy and means substances that contribute to the unification of molecules or dispersed particles, resulting in the formation of flakes. As examples of coagulating reagents you can specify, in particular, sulphates, chlorides, phosphates, carbonates (magnesium sulfate, aluminum sulfate, ammonium aluminum sulfate, ferric sulfate, calcium sulfate, sulfate, ferrous iron, ferric sulfate, zinc sulfate, aluminum chloride, Al(OH)Cl2, magnesium chloride, ferric chloride, calcium chloride, tin chloride, tin tetrachloride, zinc chloride, iron dichloride, ferric chloride, zinc carbonate-ammonium, aluminum carbonate, aluminum phosphate, zinc phosphate, iron phosphate esters, such as, for example, phosphate esters, acids, such as sulfurous acid, hydrochloric acid, phosphoric acid, acetic acid, citric acid, para-toluensulfonate and others; policestations Amin, alkylamine-epichlorohydrin, polyacrylamide, etc. as examples of such coagulating reagents available on the market, you can specify MARFLOCTM5242, MARFLOC 2150, MILFLOC V-27, ALUM, TRAMFLOC 860-899, TRAMFLOC 100, TRAMFLOC 29, TRAMFLOC 540-559, TRAMFLOC 540-560, CRODAZOLINE "O"ZELEC "UN" and ARQUAD T-50. The group preferred coagulants contains magnesium sulfate, aluminum sulfate, ammonium aluminum Sul is phat, aluminum chloride, magnesium chloride, calcium sulfate, calcium chloride or mixtures thereof. The most preferred coagulating reagent is aluminum sulfate.

The amount of coagulant in the first component of two-component composition sealing edges may be from about 1 wt%. to about 60 wt%, preferably from about 2 wt%. to about 35% weight. and more preferably from about 2 wt%. up to about 10% weight. the total weight of the components of two-component sealant composition.

In another embodiment of the invention the first component sealing composition further comprises a filler. The filler can reduce the cost or to provide the required characteristics of the composition before curing or after him. Non-limiting examples of fillers include clay, glass beads, calcium carbonate, talc, silica, organic fillers.

Compositions, sealing edges may contain, for example, water, aqueous dispersion of one or more waxes and the aqueous polymer resin. The polymer resin may include a latex resin. Non-limiting examples of coating compositions described in U.S. patent No. 6,608,131 and No. 4,897,291. Non-limiting examples of commercially available aqueous coating compositions edges of products of wood, such as OS-plates include ULTRA SEALThe m or EDGE SEALTMcompany The Valspar Corporation, as well as sealants CBSTMand WIL-SEALTMfor composite plates, supplied by the company Willamette Valley Company.

Composition for sealing edges may include an emulsion of waxes and polymer resin. A typical emulsion of waxes contain from about 20 wt%. to about 90% weight. dry matter waxes of the total weight of the first component of the composition of the sealing edges. Preferably the compositions contain from about 40 wt%. to about 80 wt%. dry matter of the wax. More preferably the compositions contain from about 60 wt%. to about 80 wt%. dry matter of wax.

The polymer resin in the composition of the sealing edges contains almost no reactive olefinic groups. The polymer resin contains almost no reactive olefinic groups when reacted with at least 95% of the olefinic monomers forming the polymer resin is not more than 5% of unreacted monomers), preferably at least 97% of olefinic monomers forming the polymer resin is not more than 3% of unreacted monomers and more preferably at least 99% of olefinic monomers forming the polymer resin is not more than 1% of unreacted monomers).

Typical latex polymer resins include polyurethanes, polyamides, gloriou is installed polyolefins, acrylic resin, vinilplastic, polymers, modified oil, polyol mixture and their copolymers. Non-limiting examples of latex resins are vinyl resins such as acrylic resins, styrene resins, rubber, vinyl halide resins, acetate resins, and mixtures thereof. Latex polymers can be obtained by polymerization chain growth using one or more olefinic monomers.

Substrate or product, which can be applied coatings using offer in the invention method include specialized substrates of wood, having edges that may be exposed to the external environment. The term "specialty products made of wood" usually refers to products or substrates, which are obtained from any parts of the wood, such as, for example, thin sheets, plates, flakes, fibers, strange (for example, wooden strange rectangular shape), sawdust, etc. These parts can be connected to each other, often using an adhesive material. Non-limiting examples of specialized products from wood include plates oriented chips (OS-plate), fibre boards, laminated veneer products from, such as, for example, plywood.

The term "wood-fiber Board" refers to the products of the der is a, derived from wood fiber. Usually fibreboard provide a building material consisting of wood chips or vegetable fibers, bonded with each other and compressed into rigid sheets. Types of wood-fiber plates in order of increasing density include chipboard, fibreboard medium density and solid fibreboard, also known as hardboard high density. Wood-fiber plates are sometimes used as a synonym chipboard. However, the term "chipboard" usually refers to wood-fiber plates of low density. Wood-fiber plates, in particular fibreboard medium density is very widely used in the furniture industry. On the outer surface of the product that will be seen, can be glued veneer to make the surfaces of the product type of natural wood.

The substrate is covered by one or more boundary surfaces of the two-component system, sealing the edges. The sealing system includes a first component, which includes the coagulant, and the second component, which includes water composition sealing the edges. The sealing system can be applied in one or several who are layers.

Two-component sealant composition has good hiding power and the necessary covering ability. The term "opacity" refers to the ability of the composition coating coating or paint evenly and indistinguishable to do any colors covered the surface of the substrate. As a rule, to provide reasonable uniformity of dyeing of the finished surface sealing system with good hiding power is required to apply a thinner layer. The term "covering power" refers to the ability of a coating to resist excessive penetration into the pores of the coated surface of the substrate. To ensure reasonable uniformity of the finished surface of the substrate does not require a large flow of coating systems with good covering power. Proposed in the invention method can provide a decrease in the amount of the composition of the sealing edges required to obtain coatings with good hiding power and hiding power.

Disclosed in the description of the method of coating the edges and pressurization systems can be improved characteristics of volatile organic compounds (POC), namely a lower concentration of such components. The preferred system sealing edges contain less than about 5% of POC, more preferably less than che is about 2% and most preferably less than about 0.5% of the total weight of two-component composition sealing the edges.

The composition of the sealing edges can be applied in one layer or in multiple layers using one or more compositions of the sealing edges (for example, the first layer is one of a sealing composition and the second layer of the other sealing compositions). Specialist in the field of production and application of sealing compounds can easily select a specific composition and to determine the order of their application to land. Such a typical aqueous coating systems have been described above. Accordingly, the two-component composition sealing edges may be deposited on the substrate once (one layer) or may be applied several layers of such compositions. The composition of the sealing edges preferably applied at a content of about 5% weight. to about 65% weight. dry matter, more preferably from about 20 wt%. to about 55 wt%. and most preferably from about 35 wt%. up to about 50% weight. Preferred compositions sealing edges contain less than 5% volatile organic compounds (POC), more preferably less than about 2% and most preferably less than about 0.5% of the total weight of the coating system.

Two-component composition sealing edges preferably applied using any coating technologies, known in the field of those who IKI, including using a brush, brush, roller, reverse roller coating by immersion, using a vacuum unit for applying a coating installation for coating irrigation or various spray devices. As examples of such spray devices, you can specify an installation with two spray guns, installation with two spray heads, guns with multiple spray heads, etc. Both components can be applied using one of the combined plant, which can cause components independently (that is, the components are not mixed inside the unit), or both components can be applied at the same time independent of the spray devices, such as independent spray guns. Non-limiting examples of combined installations are multi-component spray gun Mach 1 PCX company Binks, spray guns described in patent applications U.S. No. 6,264,113, No. 5,639,027 and No. 5,400,971 and other Various coating technology have specific advantages and disadvantages depending on the profile of the substrate structure and acceptable performance of the coating.

The film thickness can be regulated by the speed of the coating. The dry film thickness compo is icii sealing edges at the specialized wood substrate may be in the range of from about 1 mil to about 10 mils (0,0025-of 0.025 cm), more preferably from about 2 mils to about 8 mils (0,0051-0,203 cm) and most preferably from about 2 mils to about 6 mils (0,0051-of 0.015 cm).

Typical dry film thickness of two-component composition sealing the edges of specialized wood substrates is in the range from about 2 mils to about 20 mils, more preferably from about 4 mils to about 15 mils and most preferably from about 4 mils to about 8 mils.

The cover substrate is described by a system of sealing at least one edge. More preferably the substrate is covered by four edges. In addition, directly on the sealing system can be applied in surface treatment.

In the disclosed compositions sealing edges can be used such typical pigments (optional), such as titanium oxide, carbon black, lamp black, black iron oxide pigment, red oxide pigment, yellow iron oxide pigment, brown iron oxide pigment (a mixture of red and yellow iron oxide pigments with black), green phtalocyanine pigment, blue phtalocyanine pigment, organic red pigments (red naphthol red chinagreen and toluidine red pigment), Magenta chinagreen, purple chinagreen, orange DNA cresitello organic yellow pigments (for example, Hansa yellow pigment). The composition may also contain additives, regulatory Shine, or commercially available optical Brightener, such as UVITEX S of the company Ciba-Geigy.

The composition of the sealing edges may also contain a filler (optional). Typical fillers and inert ingredients for use in the described covering compositions are, for example, clay, glass beads, calcium carbonate, talc, silica, organic fillers and other

Describes the composition of the sealing edges may also contain other ingredients that modify the properties of the composition associated with its storage, transport or application. Additional optional components or additives for use in the compositions of the sealing edges include surfactants, pigments, dyes, inhibitors of the precipitation, the absorbers of UV radiation, optical brighteners, thickeners, heat stabilizers, leveling additives, indicators hardening, plasticizers, biocides, fungicides, dispersing additives, antifoams, etc. Matting tools, tools that makes them resistant to abrasion, and other additives that improve the characteristics of the compositions can be used in such amounts as may be necessary to improve x is the new of the cured coating and sealing compositions. These characteristics of the compositions include chemical resistance, abrasion resistance, hardness, gloss, reflectivity, appearance, or combinations of these characteristics, and other similar characteristics. Non-limiting examples of additives that can be used in the compositions described sealing edges, described in the publication "Industry dyes and coatings", Koleske and others, April, 2003, p.12-86.

The invention is described further by the following non-limiting Examples.

Example 1: General test to assess swelling edges

The test panel was obtained by cutting the OS panels with a sharp circular saw on plate dimensions 12×4 inches. Before applying sealant to the edges of the test plate was folded in the package and placed for two hours in a furnace at a temperature of 150°F.

Each coating material (material pre-treatment and coating composition) was loaded in a separate airless spray Kremlin with the fluid pressure of 600 psi. At a distance of approximately 5 inches from the surface region of the OS-plate installed one for all materials, the spray tip 1299 with limiter 0,33 (Spray Systems Co.). Composition for pre-treatment, obtained by dissolving in water 49,7 g/l aluminum ammonium alum, applied the spray pattern is observed at the edges of the package before applying the covering composition. The composition of the coating contained 40% solids by weight aminooctanoic aqueous dispersion of wax and styrolene-acrylato latex polymer.

The samples were removed from the furnace and was coated on a folded package on the device airless spray gun. Inflicted material pre-treatment and immediately after this was applied the coating composition. The samples were sustained for at least 24 h at ambient temperature for drying or curing the coating edges.

After drying the batch test wafers were cut off near the edges, covered with a sealing composition was applied by brush in a strip of width 1 inch protective hydrophobic coating ("apron") around the perimeter to protect against water penetration through the surface not protected by the test composition. After that, the test plate was kept for three days before testing for water absorption (see figure 4).

Thickness measurements were made using a Mitutoyo digital meter installed on the test stand and calibrated for your test bench. Thickness measurements were performed at intervals of 1 inch, starting 1 1/2 inches from the ends of the test plates. For each plate was run nine measurements. The measurements were averaged to obtain the greates who are thickness for each sample.

After the initial measurements, all samples were placed in a large tub for testing water absorption (see figure 5). Under the test plates in the tub was placed a sheet of foam rubber (item #000853440 company Hancock Fabrics) with a thickness of 2 inches. The amount of tap water in the bath was maintained at 1/8 inch below the surface of the polyethylene or similar foam by injecting at least once a day during the test period.

The test plates were removed from the bath after 72 hours and performed measurements for monitoring and evaluation. The swelling percentage for each group of test samples was determined by subtraction of the average final thickness of the average initial thickness and dividing by the average initial thickness. Efficiency in percent for each group of test samples was determined by subtracting the average amount of swelling for a group of samples from the magnitude of swelling OS panels uncoated (control samples) and dividing by the amount of swelling OS panels without coating. The results are shown in figures 1, 2 and 3.

Example 2: Applying the composition of the sealing edge OS-panel thickness 23/32 inch

Were made of the test plate (3 groups of 12 plates) thickness of 23/32 inch, as described in Example 1. Test plates of the first group had no coverage. Test the nutrient plates of the second group were covered only by the composition of the sealing edges, the layer thickness is 8 mils (wet film). Test plates of the third group were covered with a layer of a composition pre-processing thickness of 2 mils (wet)layer, and then layer composition sealing the edges with a thickness of 5 mils (wet film). After drying near the test surface was applied the "apron". After this was accomplished by the measurement of the thickness of the plates. After the measurement, the plate was placed in the bath for testing the absorption within 72 hours. After the specified time is again measured the thickness of the plates. The results are shown in figure 1 and in Table 1.

Table 1. Determination of swelling of the edges of the OS-wafer thickness 23/32 inch
Sealing floorPreparatory floorThe sample size (n)The average swelling within 72 hours %Efficiency, %
No (control samples)No1215.3-
to 8.0 mils (wet.)No1212,6of 17.0
to 5.0 mils (wet.)a 2.0 mil (wet.)125,663,40

Example 3: Applying the composition of the sealing edge OS-panel thickness of 7/16 inch

Were made of the test plate (3 groups of 12 plates) thickness of 7/16 inch, as described in Example 1. Plates of the first group had no coverage. Test plates of the second group were covered only by the composition of the sealing edges, a thickness of 8 mils (wet film). Test plates of the third group were covered with a layer of a composition pre-processing thickness of 2 mils (wet)layer, and then layer composition sealing the edges with a thickness of 5 mils (wet film). After drying near the test surface was applied the "apron". After this was accomplished by the measurement of the thickness of the plates. After the measurement, the plate was placed in the bath for testing the absorption within 72 hours. After the specified time is again measured the thickness of the plates. The results are shown in figure 2 and in Table 2.

Table 2. Determination of swelling of the edges of the OS-wafer thickness of 7/16 inch
Sealing floorOn godavitarne floor The sample size (n)The average swelling within 72 hours %Efficiency, %
No (control samples)No12of 21.2-
to 8.0 mils (wet.)No12a 12.740,10
to 5.0 mils (wet.)a 2.0 mil (wet.)124,180,70

Example 4: Application of the sealing composition to the edges of the OS-panel thickness of 7/16 inch

Were made of the test plate (7 groups of 12 plates) thickness of 7/16 inch, as described in Example 1. Plates of the first group had no coverage. Test plates of the second group were covered only by the composition of the sealing edges, a thickness of 6 mils (wet film). Test plates of the third group were covered with a layer of a composition pre-processing thickness of 1.5 mils (wet)layer, and then a layer of the composition of the sealing edge thickness of 6 mils (wet film). Test plates of the fourth group were covered with a layer of the composition Pres the preliminary processing of a thickness of 2 mils (wet film), and then a layer of the composition of the sealing edge thickness of 6 mils (wet film). Test plates of the fifth group were covered only by the composition of the sealing edges, a thickness of 8 mils (wet film). The test plate of the sixth group were covered with a layer of a composition pre-processing thickness of 1.5 mils (wet)layer, and then a layer of the composition of the sealing edge thickness of 8 mils (wet film). The test plate of the seventh group were covered with a layer of a composition pre-processing thickness of 2 mils (wet)layer, and then a layer of the composition of the sealing edge thickness of 8 mils (wet film). After drying near the test surface was applied the "apron". Then perform the measurement of the thickness of the plates. After the measurement, the plate was placed in the bath for testing the absorption within 72 hours. After the specified time is again measured the thickness of the plates. The results are shown in figure 3 and in Table 3.

Table 3. Determination of swelling of the edges of the OS-wafer thickness of 7/16 inch
Sealing floorPreparatory floorThe sample size (n)The average swelling within 72 hours % Efficiency, %
No (control samples)No12 Jan.21,7-
6.0 mil (wet.)No12 Febr.15,130,40
6.0 mil (wet.)a 1.5 mil (wet.)12 Mar.7,465,90
6.0 mil (wet.)a 2.0 mil (wet.)12 APR.5,972,80
to 8.0 mils (wet.)Nomay 1212,144,20
to 8.0 mils (wet.)a 1.5 mil (wet.)June 126,171,90
to 8.0 mils (wet.)a 2.0 mil (wet.)July 12577,00

Example 5: Determination of swelling of the edges of the OS-place is in the thickness of 7/16 inch with a sealing coat CBS company Willamette Valley

In accordance with Example 3 were made of the test plate (7 groups of 12 plates) thickness of 7/16 inch, as described in Example 1. Plates of the first group had no coverage. Test plates of the second group were covered only by the composition of the sealing edges, a thickness of 8 mils (wet film). Test plates of the third group were covered with a layer of a composition pre-processing thickness of 1.0 mils (wet)layer, and then layer composition sealing the edges with a thickness of 6.5 mils (wet film). After drying near the test surface was applied the "apron". Then perform the measurement of the thickness of the plates. After the measurement, the plate was placed in the bath for testing the absorption within 72 hours. After the specified time is again measured the thickness of the plates. The results are shown in Table 4.

Table 4. Determination of swelling of the edges of the OS-wafer thickness of 7/16 inch coated CBS company Willamette Valley
The sealing coating CBSPreparatory floorThe sample size (n)The average swelling within 72 hours %Effectiveness
Not the (control samples) No811,4-
to 8.0 mils (wet.)No86,542,90
of 6.5 mils (wet.)a 1.0 mil (wet.)8a 3.965,70

Example 6: Determination of swelling of the edges of the OS-wafer thickness 23/32 inches with a sealing coat CBS company Willamette Valley

In accordance with Example 3 were made of the test plate (7 groups of 12 plates) thickness of 23/32 inch, as described in Example 1. Plates of the first group had no coverage. Test plates of the second group were covered only by the composition of the sealing edges, a thickness of 8 mils (wet film). Test plates of the third group were covered with a layer of a composition pre-processing thickness of 1.0 mils (wet)layer, and then layer composition sealing the edges with a thickness of 6.5 mils (wet film). After drying near the test surface was applied the "apron". Then perform the measurement of the thickness of the plates. After the measurement, the plate was placed in the bath for 72 hours for testing the absorption. After the indicated time and again measured the thickness of the plates. The results are shown in Table 5.

Table 5. Determination of swelling of the edges of the OS-wafer thickness 23/32 inch coated CBS company Willamette Valley
The sealing coating CBSPreparatory floorThe sample size (n)The average swelling within 72 hours %Efficiency, %
No (control samples)No821.7-
to 8.0 mils (wet.)No813.139.60
of 6.5 mils (wet.)a 1.0 mil (wet.)87.963.50

Examples 7-10: Floor and General provisions testing to assess swelling edges

For use as a coagulant received the solution of aluminum sulfate (component a)containing 20% weight. dry matter. For testing was obtained aqueous composition (components is NT) sealing edges, containing the following ingredients: styrene-acrylic resin (20 wt%), organosilicone surfactants (0.5 wt%), emulsions of waxes (50% weight), defoamers (0.2% wt.), dyes (2 wt%), pigments (5 wt%), fungicides (0.1% wt.), viscosity regulators (1.8% wt.), water (20.4% of the weight.).

The test samples were obtained by cutting the OS-panel plate dimensions 12×4 inches. Before applying the sealing system on the edge of the test plate was folded in the package and placed for two hours in a furnace at a temperature of 150°F.

Each system component sealing component (component a - coagulant component In the composition of the sealing edges) was loaded in a modified multi-component spray gun Mach 1 PCX company inks. The spray gun used for applying the mixed flow component And the fluid pressure of 20-60 psi and the air pressure 20-80 psi) and component (fluid pressure of 60-80 psi and the air pressure of 50-60 psi).

The test plates were removed from the furnace and was coated on a folded package on the device dispenser. Coating weight was maintained at the level of 16 g/ft2or 3-4 mils (dry.). Were prepared following the test plate:

Example 7 control (uncoated);

Example 8 is covered only component In;

Example 9 is covered with a first component a and then component b;

Example 10 is covered components And Yves, mixed directly in the application.

In the preparation of test samples can be performed independent enable/disable of components a and B.

Example 7 is a control. Example 8: applied only component (composition sealing the edges). Example 9: first deposited component a and the component B. Example 10: component a and component was applied at the same time.

The samples were sustained for at least 24 h at ambient temperature for drying or curing the coating edges. After drying the batch test wafers were cut off near the edges, covered with a sealing composition was applied by brush in a strip of width 1 inch protective hydrophobic coating ("apron") around the perimeter to protect against water penetration through the surface not protected by the test composition. After that, the test plate was kept for three days before testing the absorption of water.

Measure the swelling was performed using Mitutoyo digital meter installed on the test stand and calibrated for your test bench. Thickness measurements were performed at intervals of 1 inch, starting 1 1/2 inches from the ends of the test plates. For each plate was run nine measurements. Measurement used ALIS to get the value of the thickness for each sample.

After the initial measurements, the samples were placed in a large tub for testing the absorption of water. Under the test plates in the tub was placed a sheet of polyethylene foam with a thickness of 2 inches with open pores. The amount of tap water in the bath was maintained at a level of 1/8 inch below the surface of the foam by adding at least once a day during the test period.

The test plates were removed from the bath after 72 hours and performed measurements for monitoring and evaluation. The swelling percentage for each group of test plates was determined by subtracting the average final thickness of the average initial thickness and dividing by the average initial thickness. Efficiency in percent for each group of test plates was determined by subtracting the average value of the swelling of the plates from the magnitude of swelling plates without coating and dividing by the amount of swelling of the plates without coating. The results are shown in Table 6.

Table 6. Applying sealant to the edges and tests
ExampleCoating systemCoating weight, g/ft2Swelling edges % Water absorption, %The efficiency of the component, %Appearance
7Control samples (without coating)025-3011No dataVisible void
8Component1615-206No dataVisible void
9Component a and the component122-50.5-1.5100%Most cavities are filled, the continuous film
10Component a and component simultaneously In122-50.5-1.5Need 25-30% componentMost cavities are filled, the continuous film

1. The method of sealing the edges of a wood substrate, comprising: applying for ENISA least one edge of the substrate two-component composition of the sealing edges, in which the first component contains a coagulant, and the second component contains the aqueous composition sealing the edges.

2. The method according to claim 1, wherein the first component and the second component is applied on a substrate in sequence.

3. The method according to claim 1, wherein the first component and the second component is applied using at least one spray and they are mixed with each other in a spray state prior to application to the substrate.

4. The method according to any of the preceding paragraphs, in which the coagulant is selected from the group comprising magnesium sulfate, aluminum sulfate, ammonium aluminum sulfate, ferric sulfate, calcium sulfate, sulfate, ferrous iron, ferric sulfate, zinc sulfate, aluminum chloride, Al(Oh)CL2, magnesium chloride, ferric chloride, calcium chloride, tin chloride, tin tetrachloride, zinc chloride, iron dichloride, ferric chloride, zinc carbonate-ammonium, aluminum carbonate, aluminum phosphate, zinc phosphate, iron phosphate, phosphate esters, sulfurous acid, hydrochloric acid, phosphoric acid, acetic acid, citric acid, para-toluensulfonate or mixtures thereof.

5. The method according to any one of claims 1 to 3, in which the coagulant is selected from the group comprising magnesium sulfate, aluminum sulfate, ammonium aluminum sulfate, aluminum chloride, magnesium chloride, calcium sulfate, calcium chloride or mixtures thereof.

6 the Method according to any one of claims 1 to 3, in which the coagulant is a sulfate of aluminum.

7. The method according to claim 1, in which the content of the coagulant is in the range from about 1% to about 60% of the total weight of components in two-component sealant composition.

8. The method according to claim 7, in which the content of the coagulant is in the range from about 2% to about 35% of the total weight of components in two-component sealant composition.

9. The method according to claim 8, in which the content of the coagulant is in the range from about 2% to about 10% of the total weight of components in two-component sealant composition.

10. The method according to claim 1, in which the composition of the sealing edges contains an emulsion of waxes and polymer resin.

11. The method according to claim 10, in which the composition of the sealing edges contains at least about 20 wt%. dry matter emulsion of wax.

12. The method according to claim 10, in which the composition of the sealing edges contains at least about 40 wt%. dry matter emulsion of wax.

13. The method according to claim 10, in which the composition of the sealing edges contains from about 40 wt.% up to 80 wt.% dry matter emulsion of wax.

14. The method according to claim 10, in which the polymer resin is a latex resin.

15. The method according to 14, in which the latex resin used acrylic resin, styrene-butadiene rubber, an acetate resin or the mixture.

16. The method according to claim 10, in which the polymer resin is a vinyl-latex resin.

17. The method according to claim 10, in which the polymer resin does not contain olefinic groups.

18. The method according to claim 1, wherein the first component additionally contains a filler.

19. The method according to p, in which the filler is clay, glass beads, calcium carbonate, talc, silica, organic fillers or mixtures thereof.

20. The method according to claim 1, in which a two-component composition sealing edges applied to all edges of the substrate.

21. The method according to claim 1, in which a two-component composition sealing the edges is applied on the main surface of the substrate.

22. The method according to claim 1, wherein the wood substrate is a wood-fiber plate or a laminated product of the veneer.

23. The method according to claim 1, wherein the wood substrate is a plate oriented chips.

24. The method according to claim 1, wherein the coating composition provides a film thickness from about 0,0025 cm to approximately 0.025 see

25. The method according to claim 1, wherein the coating composition provides a film thickness from about 0,0051 cm to about 0,0203 see

26. The method according A.25, in which the coating composition provides a film thickness from about 0,0051 cm to approximately 0,015 see

27. System sealing the edges of the wood substrate containing the first component, the content is of ASI coagulant, and the second component containing aqueous composition sealing the edges.

28. The system according to item 27, in which the first component and the second component deposited on a substrate in sequence.

29. The system according to item 27, in which the first component and the second component are deposited using at least one spray, and they are mixed with each other in a spray state prior to application to the substrate.

30. System according to any one of p-29, in which the aqueous composition of the sealing edges consists of an emulsion of waxes and polymer resin.

31. System according to any one of p-29, in which the first component additionally contains a filler.



 

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