WO2014114850A1 - Novel use of wood specimen - Google Patents
Novel use of wood specimen Download PDFInfo
- Publication number
- WO2014114850A1 WO2014114850A1 PCT/FI2014/050059 FI2014050059W WO2014114850A1 WO 2014114850 A1 WO2014114850 A1 WO 2014114850A1 FI 2014050059 W FI2014050059 W FI 2014050059W WO 2014114850 A1 WO2014114850 A1 WO 2014114850A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wood
- agent
- use according
- hydrophobicity
- increases
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/346—Grafting onto wood fibres
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G9/00—Forming or shuttering elements for general use
- E04G9/02—Forming boards or similar elements
- E04G9/04—Forming boards or similar elements the form surface being of wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/384—Treating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H8/00—Macromolecular compounds derived from lignocellulosic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
- B05D7/08—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood using synthetic lacquers or varnishes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2200/00—Wooden materials to be treated
- B27K2200/30—Multilayer articles comprising wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/70—Hydrophobation treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
Definitions
- the present invention relates to surface treatment of wood objects.
- the present invention relates to the use of surface-treated wood objects as casting beds for concrete and similar hardening masses
- Wood panels and solid wood are commonly used as casting surfaces, for example when concrete casting is carried out An untreated wood surface adheres tightly to the material that is cast Because of th is adherence, it is very difficult to release the wood, which is used n the casting forms, from the concrete surface, without damaging the casting surface or the wood material that is used as the casting form The adherence significantly increases the work- required for detaching the casting surfaces, causing material loss and repair work on the casting surfaces
- the present invention relates to treatment of a wood surface with a highly water-repellent and moisture-insulating substance in a way that makes it easy to detach the wood from the casting surface
- the present invention relates to the substance in question (a "release agent " ), and to a wood product that is treated with the substance in question
- the wood used as the casting surface is surface-treated with distillates of fossi l-derived crude oil, and mixtures thereof
- wood surfaces are treated, for example, with a mixture of two different commercial products: Nynas Nytex 81 0
- US Patent Specification No 3,497,375 describes a method of treating a wooden form which is used in concrete casting, by coating the surface of the wood.
- the coating is formed of two layers, in which case, first, a mixture is applied which is comprised of wax and ethylene- vinyl acetate copolymer, and this mixture forms a layer hav ing a thickness of 0 5 to 5 mm
- the wax and paraffin oil components of the compositions do not migrate into the wood.
- the detaching properties are either based on oiling the wood surface or based on a similar treatment, in order to improve the detaching properties.
- the treatment does not render the wood surface itself hydrophobic or otherwise highly water-repellent. It is possible that the detaching is based on the slippery surface of the wood fibre, or the fact that oils are usually not soluble in water.
- Wood products which are used in casting for example on a construction site are exposed to rain and to the water that passes from the mass to the wood product.
- release agents which are based on fossil-derived oil, migrate with the water to the
- the treated wood products have an unpleasant smell and are unpleasant to handle.
- the smell clings to your skin, hair and clothing. People who use the substance and the wood products find this disagreeable.
- the purpose of the present invention is to eliminate at least some of the problems associated with the known technology and to provide a new solution for treating wood surfaces which act as casting surfaces for concrete and other hardening masses (referred to below as "casting material").
- the present invention is based on the idea that agents which render the wood surface hydrophobic are used as release agents, which effectively seal the surface of the wood.
- Reactive hydrophobing agents are such substances. They adhere to the surface of wood by reacting with functional groups in the wood. They thus form a slippery surface. Therefore, during casting, the casting material cannot penetrate into the wood fibre and thereby adhere to it.
- the present invention relates to substances that act as release agents, at least as well as, and in most cases far better than, previously known solutions.
- the substances used in the present invention or at least part of them react with the wood, thereby adhering to the wood cells, and are not flushed out into the environment, for example when it rains. This is a significant advantage.
- the substances which the present invention relates to have no known environment-loading effects.
- Another advantage is that the solutions are inexpensive.
- the use of AKD in an optimal case results in a reduction of costs of at least 50 % compared to the known solutions.
- Figure 1 is a photograph of untreated softwood plywood
- Figure 2 is a photograph of a plywood sample which is treated, according to known technology, with a fossil oil-based substance, Nytex 810 + engine fuel oil;
- Figure 3 is a photograph of a sample which is treated with a 10 % aqueous dispersion of AKD (Ashland Aquapel 320);
- Figure 4 is a photograph of a sample which is treated with a polymer adhesive (Basoplast 285 S).
- Figure 5 is a photograph of a sample which is treated with a tall pitch-based processed product (BT Water Repellent).
- the present solution relates to casting bed use of a wood object which is obtained by treating a wood object with an agent that increases the hydrophobicity of wood, and which agent is capable of reacting with the wood.
- the wood object is treated with an agent that increases the hydrophobicity of wood, and which agent is capable of reacting with the hydroxyl groups or similar functional groups in the wood.
- the substance tightly adheres to the wood and possibly at least partially adheres to the wood cells.
- the wood object is treated with a hydrophobic agent, by spreading, that is, by application of the agent onto the surface of the wood object at a temperature at which the agent that increases the hydrophobicity is in a fluid state, for example in a molten state.
- a wood object is treated with a liquid mixture which comprises an agent that increases the hydrophobicity, which agent, for example, has been added into the mixture in question, in the form of a liquid dispersion.
- a hydrophobic agent or the agent can be applied to the surface as discrete patterns, that is, patterns which are separate from each other, such as spots, streaks or stripes.
- at least 50 %, most suitably at least 75 %, especially 90-100 % of the casting surface is treated.
- the corresponding part of the surface will then be covered.
- the hydrophobic agent is applied onto the surface as patterns, it is preferable to arrange the pattern in such a way that it covers the surface uniformly.
- approximately 10-200 g/m 2 particularly approximately 50-120 g/m 2 , most suitably approximately 70-100 g/m 2 of the hydrophobic treatment agent is applied onto the surface of a wood object.
- the release agent to be used may be a synthetic or a natural substance, such as a monomeric molecule, a dimer, oligomer or polymer, or a mixture thereof
- the agent that increases the hydrophobicity is alkyl ketene dimer or alkenyl ketene dimer, i.e. AKD, or a mixture which comprises such a material.
- the agent that increases the hydrophobicity is resin adhesive, tall oil, especially crude tall oil (CTO) or a processed product of it, tall oil pitch or a processed product of it, other wax, paraffin or an oily material, or another agent that increases the
- tall oil and tall oil pitch and processed products of them typically comprise acid compounds, for example fatty acids and/or resin acids that are capable of reacting with the functional groups, such as hydroxyl groups, in the wood.
- the reactivity of the treatment agent with the surface of the wood can be increased by including catalysts in the agent.
- catalysts in the agent for example the reactivity of crude tall oil can be increased by using iron catalysts, in particular iron(III) catalysts.
- the substance that is used in the present solution may be, for example, a non-organic hydrophobing agent, such as clay or silica or nanoclay or nanosilica.
- the agent may be in a solid state at room temperature during storage, and in a molten state, after having been heated, during application (such as AKD granulate).
- the agent may be a combination of the above substances, either with each other or together with another substance.
- a wood object is treated either with a molten form of alky I ketene dimer or alkenyl diketene dimer. or with a liquid mixture which mixture comprises alkyl ketene dimer or alkenyl diketene dimer 1-20 % by weight, particularly approximately 5-10 % by weight.
- AKD is applied onto the surface of the wood object approximately 1 -30 g/nr, particularly approximately 5-12 g/m 2 , which corresponds, as an aqueous dispersion, to approximately 50- 120 g/m 2 (of the dry matter). It is also possible to treat the wood object with at least one such active substance, which acts to protect against the unwanted effects of fire and/or micro-organisms or insects.
- Such an active substance or active substances can be applied onto the wood simultaneously with the agent that increases the hydrophobicity.
- the procedure is that, before the application, the active substance or the active substances are mixed into a liquid intermediate substance, which comprises an agent that increases the hydrophobicity.
- the wood preservative can be a biocide, such as IPBC (3-iodo-2-propynylbutyl-carbamate), propiconazole, tebuconazole or cypermethrin.
- the wood preservative can be a non-biocide, such as tall oil and its derivatives, and tall oil pitch and derivatives and processed products of it.
- the fire retardant can be, for example, a salt of an acid, such as formic acid, citric acid, phosphoric acid, phosphonic acid or boric acid
- the product which comprises the active substance or active substances includes one or more wood preservatives (wood protection products), or one or more fire retardants (fire protection products).
- the product may also comprise both wood preservatives and fire retardants.
- the hydrophobic agent is applied by paint-brushing, rolling, other brushing or by spraying or immersion treatment.
- the shape of the wood object is, for example, a board or a beam, and it can be a single piece, or the wood object can be a combination of several layers (laminate or composite).
- wood objects are the following: single-piece wood boards and wood beams, wood veneer, fibre board, chipboard, lumber, glue-laminated wood, plywood, LVL (laminated veneer lumber) board or beam, or OSB (oriented strand board). Of particular interest are planar pieces, such as boards.
- the treated wood surfaces can be directly used two-dimensionally, that is, for example directly as (base)plates for cast-in-situ concrete or as a surface of a casting form. However, it is possible to use them to produce desired three-dimensional structures for casting of concrete elements of various types and shapes.
- the material to be cast comprises a mixture of a hydraulically hardening binder and a filler (aggregate).
- the binder may be, for example, clinker-based or pozzolan-based. It is known that typical binders of concrete masses are for example. Portland cement, Portland blended cement, blast furnace slag cement, pozzolan cement and blended cement, particular examples of which cements are also sulphate resistant Portland cement, Portland limestone cement and Portland blast furnace slag cement.
- the wood surfaces can also be used as casting surfaces for other masses that are mineral-bearing and which harden, as well as for polymer masses and composite masses.
- the following non-limiting examples clarify the present invention.
- aqueous dispersion of AKD is mixed into water at a ratio of 1 : 1 , in which case the resulting release agent solution comprises AKD approximately 10 % by weight.
- This solution is applied onto the surface of spruce plywood on an industrial surface treatment line.
- the AKD When the AKD dries, it reacts with the hydroxyl groups in the wood and makes the wood surface highly water-repellent and, at the same time, generates a waxy layer on the surface of the wood.
- Concrete casting forms are prepared using the wood board which is treated in this way.
- the wet concrete is poured into the forms and allowed to dry.
- the form structures are dismantled, that is, the plywood parts are detached from the concrete.
- the plywood parts which are treated according to the present invention, can be easily detached from the surface of the concrete, without damaging the boards or the concrete, thus the need for any repair of the concrete surface is reduced and the recycling of the boards is improved. In addition, the working safety and comfort are improved.
- This test examines the adhesion of the wood surface to the concrete.
- the test demonstrates well the detaching properties of the release agents.
- "concrete cakes” are cast onto a treated softwood-plywood surface, which cakes are detached from the surface, after drying.
- the detachability, the quality of the casting surface, and the amount of concrete remaining on the wood board are compared in the analysis of the results.
- the most significant property with regard to the application is the detachability, that is, how easily the wood surface is detached from the casting surface.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Biochemistry (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The use as a casting bed of a wood object which is prepared by treating the wood object with an agent that increases the hydrophobicity of wood, and which agent is capable of reacting with the hydroxyl groups of wood. The agent that increases the hydrophobicity is particularly alkyl ketene dimer or alkenyl diketene dimer, which is brought onto the surface of the wood object in a molten state or in the form of a dispersion. When the agent reacts with the wood it also adheres to the cells of the wood, and is not flushed out into the environment.
Description
I
New use of wood specimen
The present invention relates to surface treatment of wood objects. In particular, the present invention relates to the use of surface-treated wood objects as casting beds for concrete and similar hardening masses
Wood panels and solid wood are commonly used as casting surfaces, for example when concrete casting is carried out An untreated wood surface adheres tightly to the material that is cast Because of th is adherence, it is very difficult to release the wood, which is used n the casting forms, from the concrete surface, without damaging the casting surface or the wood material that is used as the casting form The adherence significantly increases the work- required for detaching the casting surfaces, causing material loss and repair work on the casting surfaces The present invention relates to treatment of a wood surface with a highly water-repellent and moisture-insulating substance in a way that makes it easy to detach the wood from the casting surface The present invention relates to the substance in question (a "release agent"), and to a wood product that is treated with the substance in question In previous solutions, the wood used as the casting surface is surface-treated with distillates of fossi l-derived crude oil, and mixtures thereof In known solutions, wood surfaces are treated, for example, with a mixture of two different commercial products: Nynas Nytex 81 0
(Distil lates petroleum, hydrotreated heavy naphthenic) and Neste engine fuel oil -5 - 1 5. Published Patent Application WO 20081 5442 1 describes a coating composition, which comprises a fluorine-containing compound and a polycarbodiimide The composition is applied onto the surface of a substrate such as wood
US Patent Specification No 3,497,375 describes a method of treating a wooden form which is used in concrete casting, by coating the surface of the wood. The coating is formed of two layers, in which case, first, a mixture is applied which is comprised of wax and ethylene- vinyl acetate copolymer, and this mixture forms a layer hav ing a thickness of 0 5 to 5 mm The wax
and paraffin oil components of the compositions do not migrate into the wood.
US Published Patent Application No. 2009304939 and Published Patent Application WO 20090041 10 describe the application of an aqueous dispersion or aqueous solution of AKD onto a wood surface, thereby improving the hydrophobicity of the wood.
In previous solutions the detaching properties are either based on oiling the wood surface or based on a similar treatment, in order to improve the detaching properties. The treatment does not render the wood surface itself hydrophobic or otherwise highly water-repellent. It is possible that the detaching is based on the slippery surface of the wood fibre, or the fact that oils are usually not soluble in water.
Wood products which are used in casting for example on a construction site are exposed to rain and to the water that passes from the mass to the wood product. In these conditions, release agents, which are based on fossil-derived oil, migrate with the water to the
environment and are of concern regarding environmental damage.
When the release agent described above is applied onto wood in construction site conditions, it is not possible to completely prevent it from entering the environment, for example as splashes.
In addition, the treated wood products have an unpleasant smell and are unpleasant to handle. The smell clings to your skin, hair and clothing. People who use the substance and the wood products find this disagreeable.
The purpose of the present invention is to eliminate at least some of the problems associated with the known technology and to provide a new solution for treating wood surfaces which act as casting surfaces for concrete and other hardening masses (referred to below as "casting material").
The present invention is based on the idea that agents which render the wood surface hydrophobic are used as release agents, which effectively seal the surface of the wood.
Reactive hydrophobing agents are such substances. They adhere to the surface of wood by reacting with functional groups in the wood. They thus form a slippery surface. Therefore, during casting, the casting material cannot penetrate into the wood fibre and thereby adhere to it.
More specifically, the use according to the present invention is mainly characterized by what is stated in the characterizing part of Claim 1.
Considerable advantages are achieved with the present invention. Thus, unlike previous solutions, raw materials that are based on fossil oils are not used in the invention. Solutions that are based on coating films, such as thermosetting resins which are impregnated into paper, or plastic films which can be laminated, are not used either.
The present invention relates to substances that act as release agents, at least as well as, and in most cases far better than, previously known solutions. In addition, the substances used in the present invention or at least part of them react with the wood, thereby adhering to the wood cells, and are not flushed out into the environment, for example when it rains. This is a significant advantage. The substances which the present invention relates to have no known environment-loading effects.
Another advantage is that the solutions are inexpensive. For example, the use of AKD in an optimal case results in a reduction of costs of at least 50 % compared to the known solutions.
The substances which the present invention relates to are not known to be used in casting. In fact, their suitability for said application is very surprising. When wood is used for casting beds or casting forms, for example in the casting of concrete, the wood object is exposed to a very intense and long-term contact with water and the hardening concrete. Wood treatment tests and the use of wood in concrete casting tests, according to the present invention, gave surprisingly good results, and the reference publications mentioned in the introduction, do not refer to the fact that wood which is treated as described above could be suitable as a casting bed.
The accompanying drawings show photographs of samples described in the application examples.
Figure 1 is a photograph of untreated softwood plywood;
Figure 2 is a photograph of a plywood sample which is treated, according to known technology, with a fossil oil-based substance, Nytex 810 + engine fuel oil;
Figure 3 is a photograph of a sample which is treated with a 10 % aqueous dispersion of AKD (Ashland Aquapel 320);
Figure 4 is a photograph of a sample which is treated with a polymer adhesive (Basoplast 285 S); and
Figure 5 is a photograph of a sample which is treated with a tall pitch-based processed product (BT Water Repellent).
As will appear from the above, the present solution relates to casting bed use of a wood object which is obtained by treating a wood object with an agent that increases the hydrophobicity of wood, and which agent is capable of reacting with the wood.
In particular, the wood object is treated with an agent that increases the hydrophobicity of wood, and which agent is capable of reacting with the hydroxyl groups or similar functional groups in the wood.
In the present solution, the substance tightly adheres to the wood and possibly at least partially adheres to the wood cells. In one embodiment, the wood object is treated with a hydrophobic agent, by spreading, that is, by application of the agent onto the surface of the wood object at a temperature at which the agent that increases the hydrophobicity is in a fluid state, for example in a molten state.
In another embodiment, a wood object is treated with a liquid mixture which comprises an agent that increases the hydrophobicity, which agent, for example, has been added into the mixture in question, in the form of a liquid dispersion.
It is possible to treat the whole surface with a hydrophobic agent, or the agent can be applied to the surface as discrete patterns, that is, patterns which are separate from each other, such as spots, streaks or stripes. In particular, however, at least 50 %, most suitably at least 75 %, especially 90-100 % of the casting surface is treated. The corresponding part of the surface will then be covered. If the hydrophobic agent is applied onto the surface as patterns, it is preferable to arrange the pattern in such a way that it covers the surface uniformly.
In general, approximately 10-200 g/m2, particularly approximately 50-120 g/m2, most suitably approximately 70-100 g/m2 of the hydrophobic treatment agent is applied onto the surface of a wood object.
The release agent to be used may be a synthetic or a natural substance, such as a monomeric molecule, a dimer, oligomer or polymer, or a mixture thereof
In one embodiment, the agent that increases the hydrophobicity is alkyl ketene dimer or alkenyl ketene dimer, i.e. AKD, or a mixture which comprises such a material.
In another embodiment, the agent that increases the hydrophobicity is resin adhesive, tall oil, especially crude tall oil (CTO) or a processed product of it, tall oil pitch or a processed product of it, other wax, paraffin or an oily material, or another agent that increases the
hydrophobicity. For example, tall oil and tall oil pitch and processed products of them, as well as paraffinic and oily substances and waxes, typically comprise acid compounds, for example fatty acids and/or resin acids that are capable of reacting with the functional groups, such as hydroxyl groups, in the wood.
If necessary, the reactivity of the treatment agent with the surface of the wood can be increased by including catalysts in the agent. Thus, for example the reactivity of crude tall oil can be increased by using iron catalysts, in particular iron(III) catalysts.
In addition to the preceding organic substances, the substance that is used in the present solution may be, for example, a non-organic hydrophobing agent, such as clay or silica or nanoclay or nanosilica.
The agent may be in a solid state at room temperature during storage, and in a molten state, after having been heated, during application (such as AKD granulate). In addition, the agent may be a combination of the above substances, either with each other or together with another substance.
In one embodiment, a wood object is treated either with a molten form of alky I ketene dimer or alkenyl diketene dimer. or with a liquid mixture which mixture comprises alkyl ketene dimer or alkenyl diketene dimer 1-20 % by weight, particularly approximately 5-10 % by weight.
AKD is applied onto the surface of the wood object approximately 1 -30 g/nr, particularly approximately 5-12 g/m2, which corresponds, as an aqueous dispersion, to approximately 50- 120 g/m2 (of the dry matter). It is also possible to treat the wood object with at least one such active substance, which acts to protect against the unwanted effects of fire and/or micro-organisms or insects.
Such an active substance or active substances can be applied onto the wood simultaneously with the agent that increases the hydrophobicity. For example, the procedure is that, before the application, the active substance or the active substances are mixed into a liquid intermediate substance, which comprises an agent that increases the hydrophobicity.
Examples of suitable substances are the following. The wood preservative can be a biocide, such as IPBC (3-iodo-2-propynylbutyl-carbamate), propiconazole, tebuconazole or cypermethrin. Alternatively, the wood preservative can be a non-biocide, such as tall oil and its derivatives, and tall oil pitch and derivatives and processed products of it. The fire retardant can be, for example, a salt of an acid, such as formic acid, citric acid, phosphoric acid, phosphonic acid or boric acid
The product which comprises the active substance or active substances, includes one or more wood preservatives (wood protection products), or one or more fire retardants (fire protection products). The product may also comprise both wood preservatives and fire retardants. In one embodiment, the hydrophobic agent is applied by paint-brushing, rolling, other brushing or by spraying or immersion treatment.
In the present solution, the shape of the wood object is, for example, a board or a beam, and it can be a single piece, or the wood object can be a combination of several layers (laminate or composite).
Examples of wood objects are the following: single-piece wood boards and wood beams, wood veneer, fibre board, chipboard, lumber, glue-laminated wood, plywood, LVL (laminated veneer lumber) board or beam, or OSB (oriented strand board). Of particular interest are planar pieces, such as boards.
The treated wood surfaces can be directly used two-dimensionally, that is, for example directly as (base)plates for cast-in-situ concrete or as a surface of a casting form. However, it is possible to use them to produce desired three-dimensional structures for casting of concrete elements of various types and shapes.
Typically, the material to be cast comprises a mixture of a hydraulically hardening binder and a filler (aggregate). The binder may be, for example, clinker-based or pozzolan-based. It is known that typical binders of concrete masses are for example. Portland cement, Portland blended cement, blast furnace slag cement, pozzolan cement and blended cement, particular examples of which cements are also sulphate resistant Portland cement, Portland limestone cement and Portland blast furnace slag cement.
Due to their good detaching properties, the wood surfaces can also be used as casting surfaces for other masses that are mineral-bearing and which harden, as well as for polymer masses and composite masses.
The following non-limiting examples clarify the present invention.
Example: Treatment of wood with a hydrophobing agent that reacts with the hydroxy! groups in the wood
An aqueous dispersion of AKD is mixed into water at a ratio of 1 : 1 , in which case the resulting release agent solution comprises AKD approximately 10 % by weight. This solution is applied onto the surface of spruce plywood on an industrial surface treatment line.
When the AKD dries, it reacts with the hydroxyl groups in the wood and makes the wood surface highly water-repellent and, at the same time, generates a waxy layer on the surface of the wood.
Concrete casting forms are prepared using the wood board which is treated in this way. The wet concrete is poured into the forms and allowed to dry. When the concrete has dried, the form structures are dismantled, that is, the plywood parts are detached from the concrete. The plywood parts, which are treated according to the present invention, can be easily detached from the surface of the concrete, without damaging the boards or the concrete, thus the need for any repair of the concrete surface is reduced and the recycling of the boards is improved. In addition, the working safety and comfort are improved.
Casting experiments have been carried out with the spruce plywood that is treated with the AKD dispersion described above. The tests also involved other solutions which the present invention relates to, and which solutions are suitable for this example. The procedure and the results of the test are described in the following casting test.
Casting test
This test examines the adhesion of the wood surface to the concrete. The test demonstrates well the detaching properties of the release agents. In this test, "concrete cakes" are cast onto a treated softwood-plywood surface, which cakes are detached from the surface, after drying. The detachability, the quality of the casting surface, and the amount of concrete remaining on
the wood board are compared in the analysis of the results.
The most significant property with regard to the application is the detachability, that is, how easily the wood surface is detached from the casting surface.
The table below describes the results. The figures show the board surface and the concrete surface after the drying of the casting.
Table
List of References
Patent Publications
WO 2008154421
US 3,497,375
US 2009304939
WO 2009004110
Claims
1 . The use as casting bed of a wood object which is obtained by treating the surface of the wood object with an agent that increases the hydrophobicity of wood, and which agent is capable of reacting with the wood.
2. The use according to Claim 1 , characterized in that the wood object has been treated with an agent that increases the hydrophobicity of wood, and which agent is capable of reacting with the hydroxy I groups of wood.
3. A use according to Claim 1 or 2, characterized in that the wood object is treated with a hydrophobic agent by applying the agent onto the surface of the wood object at a temperature at which the agent that increases the hydrophobicity is in a fluid state, for example in a molten state.
4. A use according to Claim 1 or 2, characterized in that the wood object is treated with a liquid mixture which comprises an agent that increases the hydrophobicity.
5. The use according to Claim 4, characterized in that the agent that increases the hydrophobicity is added, in the form of a dispersion, into the mixture.
6. A use according to any of the preceding claims, characterized in that the agent that increases the hydrophobicity of wood is alky 1 ketene dimer or alkenyl diketene dimer, resin adhesive, tall oil or a processed product of it, tall oil pitch or a processed product of it, other wax. paraffin or an oily material, or a non-organic hydrophobing agent, such as clay or silica or nanoclay or nanosilica.
7. A use according to any of the preceding claims, characterized in that the wood object is treated either with a molten form of alkyl ketene dimer or alkenyl diketene dimer, or with a liquid mixture which mixture comprises alkyl ketene dimer or alkenyl diketene dimer 1 -20 % by weight, particularly approximately 5-10 % by weight.
8. A use according to any of the preceding claims, characterized in that the wood object is treated with at least one active substance which acts to protect against the unwanted effects of fire and/or micro-organisms or insects.
9. The use according to Claim 8, characterized in that the active substance or the active substances have been applied onto the wood simultaneously with the agent that increases the hydrophobicity of wood, for example by mixing, before the application, the active substance or the active substances into a liquid intermediate substance which comprises an agent that increases the hydrophobicity.
10. A use according to any of the preceding claims, characterized in that the treatment is carried out by paint-brushing, rolling, other brushing or spraying or immersion treatment.
1 1. A use according to any of the preceding claims, characterized in that the shape of the wood object is for example a board or a beam, and that the wood object is a single piece or that the wood ob ject is a combination of several layers.
12. A use according to any of the preceding claims, characterized in that the wood object is a single-piece wood board or wood beam, or wood veneer, fibre board, chipboard, lumber, glue- laminated wood, plywood, LVL (laminated veneer lumber) board or beam, or OSB (oriented strand board).
13. A use according to any of the preceding claims, characterized in that approximately 1 -30 g/m2, particularly approximately 5-12 g/m2 of AKD (of the dry matter) has been applied onto the surface of the wood object.
14 A use according to any of the preceding claims, characterized in that the wood object is used as a casting bed for concrete or a similar mass that is mineral-bearing and which hardens.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14708925.4A EP2948282A1 (en) | 2013-01-24 | 2014-01-24 | Novel use of wood specimen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20135069 | 2013-01-24 | ||
FI20135069A FI20135069L (en) | 2013-01-24 | 2013-01-24 | New use of piece of wood |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014114850A1 true WO2014114850A1 (en) | 2014-07-31 |
Family
ID=50239667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2014/050059 WO2014114850A1 (en) | 2013-01-24 | 2014-01-24 | Novel use of wood specimen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2948282A1 (en) |
FI (1) | FI20135069L (en) |
WO (1) | WO2014114850A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015086902A1 (en) * | 2013-12-13 | 2015-06-18 | Honkarakenne Oyj | Method for treating wood, wood product and use field of the invention |
WO2016022951A1 (en) * | 2014-08-07 | 2016-02-11 | Georgia-Pacific Chemicals Llc | Lignocellulose composite products |
EP2934834A4 (en) * | 2012-12-21 | 2016-04-27 | Metsäliitto Osuuskunta | Method of treating a wood object and an object thus obtained |
WO2016102777A1 (en) * | 2014-12-22 | 2016-06-30 | Aalto University Foundation | Treatment method for wood and wooden surface obtained by such method |
EP4269093A1 (en) | 2022-04-20 | 2023-11-01 | UPM Plywood Oy | An article comprising laminated wood and a method for treating laminated wood |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2863364A (en) * | 1954-01-26 | 1958-12-09 | Statens Skogsind Ab | Process for manufacturing form board for casting concrete |
US3497375A (en) * | 1967-10-09 | 1970-02-24 | Chevron Res | Coated wooden concrete mold and a method for making same |
US4076569A (en) * | 1976-04-14 | 1978-02-28 | Arnold Buchbinder | Process for upgrading plywood panels |
WO2009156594A1 (en) * | 2008-06-27 | 2009-12-30 | Dynea Oy | Method for treating a wood board |
-
2013
- 2013-01-24 FI FI20135069A patent/FI20135069L/en unknown
-
2014
- 2014-01-24 WO PCT/FI2014/050059 patent/WO2014114850A1/en active Application Filing
- 2014-01-24 EP EP14708925.4A patent/EP2948282A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2863364A (en) * | 1954-01-26 | 1958-12-09 | Statens Skogsind Ab | Process for manufacturing form board for casting concrete |
US3497375A (en) * | 1967-10-09 | 1970-02-24 | Chevron Res | Coated wooden concrete mold and a method for making same |
US4076569A (en) * | 1976-04-14 | 1978-02-28 | Arnold Buchbinder | Process for upgrading plywood panels |
WO2009156594A1 (en) * | 2008-06-27 | 2009-12-30 | Dynea Oy | Method for treating a wood board |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2934834A4 (en) * | 2012-12-21 | 2016-04-27 | Metsäliitto Osuuskunta | Method of treating a wood object and an object thus obtained |
EP3450124A1 (en) * | 2012-12-21 | 2019-03-06 | Metsäliitto Osuuskunta | Method of treating a wood object |
WO2015086902A1 (en) * | 2013-12-13 | 2015-06-18 | Honkarakenne Oyj | Method for treating wood, wood product and use field of the invention |
WO2016022951A1 (en) * | 2014-08-07 | 2016-02-11 | Georgia-Pacific Chemicals Llc | Lignocellulose composite products |
US10227460B2 (en) | 2014-08-07 | 2019-03-12 | Georgia-Pacific Chemicals Llc | Lignocellulose composite products |
WO2016102777A1 (en) * | 2014-12-22 | 2016-06-30 | Aalto University Foundation | Treatment method for wood and wooden surface obtained by such method |
EP4269093A1 (en) | 2022-04-20 | 2023-11-01 | UPM Plywood Oy | An article comprising laminated wood and a method for treating laminated wood |
Also Published As
Publication number | Publication date |
---|---|
FI20135069L (en) | 2014-07-25 |
EP2948282A1 (en) | 2015-12-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2948282A1 (en) | Novel use of wood specimen | |
FI121917B (en) | Composition and process for processing wood-based material and wood-based material treated with the composition | |
CA2818836C (en) | Environmentally friendly wood treatment process | |
EP2660224A1 (en) | Waterproofing composition | |
Schiopu et al. | Wood preservatives | |
US5200457A (en) | Water repellant for wood | |
FI128757B (en) | Method of treating wood objects, wood objects treated by the method and mixture for use in the method | |
DE1492513A1 (en) | Wood treatment agents | |
FI100981B (en) | Coating composition and method for protecting the surfaces of building materials against undesired reactions of microorganisms | |
KR20110030510A (en) | Compositions for treating materials and methods of treating same | |
JP6454837B2 (en) | Wood protection | |
DE102007002395B4 (en) | Use of a water repellent for tack-free laminated and parquet floor elements | |
WO2013060943A1 (en) | A method for treating wooden material and wooden material produced by the method | |
EP3450124A1 (en) | Method of treating a wood object | |
Karlsson et al. | Thermally modified wood treated with methacrylate | |
JP5058999B2 (en) | Method for hydrophobizing construction material and improving the beading effect of the material | |
US20100196723A1 (en) | Surface Applied Waterproofing Compositions And Methods For Concrete Systems | |
FI20185752A1 (en) | A method for providing wood with a flame retardant and the flame retardant composition | |
US9125403B2 (en) | Waterproofing and preservative compositions for organic material | |
WO2008119867A1 (en) | Product, such as paint, for protecting structure materials | |
WO2001023154A1 (en) | Method of protecting wood | |
CZ32933U1 (en) | Impregnating emulsion for concrete surfaces | |
CA2392656C (en) | Method for preparing modified wooden material | |
CA2996976A1 (en) | Water repellent combinations | |
US8221533B2 (en) | Method to render surfaces water repellent |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14708925 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014708925 Country of ref document: EP |