WO2020194956A1

WO2020194956A1 - Coating composition for wood and woody materials, and use thereof

Info

Publication number: WO2020194956A1
Application number: PCT/JP2019/050897
Authority: WO
Inventors: 健一土澤; 橋本　三昌; 麻衣子原
Original assignee: 日東紡績株式会社
Priority date: 2019-03-27
Filing date: 2019-12-25
Publication date: 2020-10-01
Also published as: JPWO2020194956A1; TW202041625A

Abstract

Provided is a coating composition that is curable at room temperature and contains a boron compound and an organic silane compound having an amino group and that exhibits excellent permeability into wood and woody materials while various characteristics such as high hardness are maintained. This coating composition for wood and woody materials contains: (a) a silane compound including an amino group represented by formula R_4-n-Si-(OR')_n (in the formula, R represents an organic group containing an amino group and, when more than one R exist, each R may be the same or different from each other, R' represents a methyl group, an ethyl group, or a propyl group and, when more than one R' exist, each R' may be the same or different from each other, and n represents an integer selected from 1-3); (b) at least one boron compound selected from the group consisting of H₃BO₃ and B₂O₃; and (c) an organic solvent containing not less than 10 mass% of a lower alcohol.

Description

Coating compositions for wood and wood-based materials and their uses

The present invention is a coating composition for wood and wood materials, which contains an organic silane compound having an amino group, a boron compound, and an organic solvent having a specific composition, and has excellent coatability and permeability to wood and / or wood materials. , A method for producing a coated wood or wood-based material using the same, and its use.

The polymer substance obtained by reacting an organic silane compound with a boron compound can have both the advantages of an inorganic material and the advantages of an organic material, and more specifically, it has high hardness, crack prevention, and transparency. Since it is possible to design to appropriately provide properties, heat resistance, chemical resistance, etc. according to the application, it is applied to various applications such as coating agents, paints, adhesives, glass substrates, and fillers.

In particular, a polymer substance obtained by reacting an organic silane compound having an amino group with a specific boron compound does not require complicated steps such as hydrolysis required in a sol-gel method and the like, and is relatively relatively. It can be formed in a short time and has excellent properties such as being applicable to a one-component room temperature curable material.
As a coating agent, by further combining the organic silane compound having an amino group and a specific boron compound with a metal alkoxide and lithium, the hard coat property is good even when dried under normal temperature and humidity, and the metal can be coated. It has been reported that a film having good adhesion is obtained, and that it can be used as a coating agent for metals, glass, ceramics, plastics and the like (see, for example, Patent Document 1).

From the viewpoint of scratch prevention, waterproofing, antifouling, etc., wood and wood-based materials are strongly required to have a coating that can be cured at room temperature and has excellent hardness. In the study of the material using the organic silane compound having an amino group and the boron compound, application to wood is also suggested (see, for example, Patent Document 2).
However, the results of actual use in coatings for wood or wood-based materials have not been reported, and therefore the formulation of compositions suitable for coatings for wood or wood-based materials and their design guidelines have not been reported.
In addition, since wood and wood-based materials are porous, when applying the coating agent, from the viewpoint of maintaining antifouling properties and texture (especially the texture of solid wood), the wood and / or wood-based material of the coating agent should be used. Must be highly permeable. However, it is a coating agent that can be cured at room temperature and has excellent hardness, such as the above-mentioned coating composition based on an organic silane compound having an amino group and a specific boron compound, and has permeability to wood and / or wood-based materials. No excellent coating agent has been reported so far.

Japanese Unexamined Patent Publication No. 2011-26473 International Publication No. 2006/129695

In view of the strong demand for permeability to wood and / or wood-based materials in coatings for wood or wood-based materials from the viewpoint of maintaining texture, especially solid texture, and the limitations of the prior art described above, the present invention is amino. A coating composition that can be cured at room temperature and contains an organic silane compound having a group and a boron compound, and has excellent permeability to wood and / or wood-based materials while maintaining excellent properties such as high hardness. It is an object of the present invention to provide a coating composition.

As a result of diligent studies, the present inventors have found that in a coating composition based on a material system in which an organic silane compound having an amino group and a specific boron compound are combined, in an organic solvent having a specific composition, more specifically, in an organic solvent. The present invention has been found that by keeping the content of the lower alcohol in the above range within a predetermined range, the permeability to wood and / or wood-based materials can be significantly improved while maintaining the excellent properties of the material system. It came to be completed.
That is, the present invention
[1]
(A) Silane compound containing an amino group represented by the following formula R _4-n- Si- (OR') _n
(In the formula, R represents an amino group-containing organic group, and when a plurality of them are present, they may be the same or different from each other, and R'represents a methyl group, an ethyl group or a propyl group, and there are a plurality of them. In some cases, they may be the same or different from each other, and n represents an integer selected from 1 to 3);
(B) At least one boron compound selected from the group consisting of H ₃ BO ₃ and B ₂ O ₃ ; and (c) an organic solvent containing 10% by mass or more of a lower alcohol;
Containing, a coating composition for wood and wood-based materials.
The term "coating composition for wood and wood-based materials" as used herein means that it is sufficient if it can be used for either a coating for wood or a coating for wood-based materials, and a coating composition that can be used only for coating for wood. Both the material and the coating composition that can be used only for the coating for wood materials are included in the scope of the present invention.

In addition, the following [2] to [12] are all preferred embodiments or embodiments of the present invention.
[2]
(C) The coating composition for wood and wood-based materials according to [1], wherein the organic solvent containing 10% by mass or more of the lower alcohol contains 30 to 90% by mass of the lower alcohol.
[3]
The coating composition for wood and wood-based materials according to [1] or [2], wherein the lower alcohol has 2 to 5 carbon atoms.
[4]
The coating composition for wood and wood-based materials according to any one of [1] to [3], wherein the organic solvent containing 10% by mass or more of the lower alcohol (c) further contains glycol ether.
[5]
The coating composition for wood and wood-based materials according to any one of [1] to [4], wherein the component (a) and the component (b) can form a reaction product having a polymer structure. ..
[6]
The coating composition for wood and wood-based materials according to any one of [1] to [5], further containing (d) a metal alkoxide (excluding those corresponding to the component (a) above).
[7]
The coating composition for wood and wood-based materials according to any one of [1] to [6], which further contains (e) a surfactant.
[8]
The coating composition for wood and wood-based materials according to [7], wherein the (e) surfactant contains at least one fluorine-based surfactant.
[9]
The coating composition for wood and wood-based materials according to any one of [1] to [8], which further contains (f) an epoxy resin.

[10]
A coating obtained by curing the coating composition for wood and wood-based materials according to any one of [1] to [9].
[11]
A coated wood or wood-based material having the coating according to [10] and wood and / or wood-based material.
[12]
The coated wood or wood-based material according to [11], wherein the wood and / or wood-based material includes solid wood.
[13]
A method for producing a coated wood or wood-based material, which comprises a step of applying the coating composition for wood and wood-based material according to any one of [1] to [9] to wood or wood-based material.
[14]
The method for producing a coated wood or wood-based material according to [13], wherein the wood or wood-based material is solid wood.
[15]
Furniture, architectural elements, stationery, tableware, or sporting goods having the coated wood or wood-based material according to [11] or [12].
[16]
A method for manufacturing furniture, architectural elements, stationery, tableware, or sporting goods, which comprises a step of manufacturing coated wood or wood-based material by the method according to [13] or [14].

According to the present invention, a coating composition for wood and wood materials, and a coating composition for wood materials, which can significantly improve the permeability of the coating composition to wood and / or wood materials while maintaining excellent properties such as high hardness. A coated wood or wood-based material having suitable properties based on an appropriate coating amount is provided.
The coating composition is an appropriate coating based on excellent properties such as high hardness derived from a polymer substance obtained by reacting an organic silane compound and a boron compound, and high permeability which is particularly important in wood and wood materials. Since it can be compatible with the amount, it can be particularly preferably used in the coating of wood-based materials used for furniture, building materials, stationery, tableware and the like.

The present invention is a coating composition for wood and wood-based materials containing the following components (a), (b), and (c).
(A) Silane compound containing an amino group represented by the following formula R _4-n- Si- (OR') _n
(In the formula, R represents an amino group-containing organic group, and when a plurality of them are present, they may be the same or different from each other, and R'represents a methyl group, an ethyl group or a propyl group, and there are a plurality of them. In some cases, they may be the same or different from each other, and n represents an integer selected from 1 to 3);
(B) At least one boron compound selected from the group consisting of H ₃ BO ₃ and B ₂ O ₃ ; and (c) an organic solvent containing 10% by mass or more of a lower alcohol.

Therefore, in the coating composition for wood and wood-based materials of the present invention, the component (a) (silane compound containing an amino group) and the component (b) (boron compound) usually contain 10% by mass of (c) lower alcohol. It is a composition dissolved or dispersed in the organic solvent contained above. The coating layer for wood and wood materials obtained by curing the coating composition for wood and wood materials of the present invention usually has at least a part of the chemical structure obtained by reacting the above components (a) and (b). Contains the containing compound. Further, in the coating composition for wood and wood-based materials of the present invention, the component (a) and the component (b) may partially react even before curing, and therefore the component (a) and the component (b) It may contain a part of the reaction product of.
In many cases, the chemical structure obtained by reacting the above-mentioned component (a) (silane compound containing an amino group) and component (b) (boron compound) forms a polymer structure. Typically, the (b) boron compound acts as a cross-linking agent via the amino groups in the (a) silane compound containing an amino group, and these components are polymerized to contain (a) an amino group. A polymer structure having a structural unit derived from a silane compound and (b) a structural unit derived from a boron compound is formed.
That is, in the coating composition for wood and wood-based materials of this preferred embodiment, the reaction product in which the component (a) and the component (b) have a polymer structure typically under the condition of 10 to 50 ° C. It is a combination that can form. That is, the reaction product has a polymer structure having a structural unit derived from the component (a) and a structural unit derived from the component (b). In this polymer structure, the ratio of the structural unit derived from the component (a) to the structural unit derived from the component (b) is derived from the component (b) with respect to 1 mol of the structural unit derived from the component (a). The derived structural unit is preferably 0.02 mol or more.

Further, in this embodiment, the polymer structure having the structural unit derived from the component (a) and the structural unit derived from the component (b) is the other component, for example, (d) metal alkoxide or (f) described later. ) It may have a structure modified by an epoxy resin. Further, the reaction product has a structure other than that, for example, the structural unit derived from the metal alkoxide of the component (d) has a structural unit derived from the component (a) and a structural unit derived from the component (b). It may have a structure incorporated into a polymer structure.

(A) Silane compound containing an amino group The component (a) is a silane compound containing an amino group having a specific structure represented by the following formula.
R _4-n -Si- (OR') _n
(In the formula, R represents an amino group-containing organic group, R'represents a methyl group, an ethyl group or a propyl group, and n represents an integer selected from 1 to 3.)

Here, R represents an organic group containing an amino group, for example, monoaminomethyl, diaminomethyl, triaminomethyl, monoaminoethyl, diaminoethyl, triaminoethyl, monoaminopropyl, diaminopropyl, triaminopropyl, Examples include, but are not limited to, monoaminobutyl, diaminobutyl, triaminobutyl, and organic groups having an alkyl or aryl group having a higher number of carbon atoms. γ-Aminopropyl and aminoethylaminopropyl are particularly preferable, and γ-aminopropyl is most preferable. When a plurality of R's exist, they may be the same as each other or may be different from each other.

(A) R'in the component represents a methyl group, an ethyl group or a propyl group. Among them, a methyl group and an ethyl group are preferable. When there are a plurality of R's, they may be the same as each other or different from each other.

(A) n in the component represents an integer selected from 1 to 3. Among them, n is preferably 2 to 3, and n is particularly preferably 3.
That is, as the component (a), γ-aminopropyltriethoxysilane and N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane are particularly preferable.

(B) Boron compound The component (b) is at least one boron compound selected from the group consisting of H ₃ BO ₃ and B ₂ O ₃ . The component (b) is preferably H ₃ BO ₃ .

The amount of both components used in the reaction between the component (a) and the component (b) is preferably at a ratio of 0.02 mol or more of the component (b) to 1 mol of the component (a), and more preferably. The ratio of (a) component to 1 mol of (b) component is 0.02 mol to 8 mol, more preferably 0.02 mol to 5 mol.
By having 0.02 mol or more of the component (b) with respect to 1 mol of the component (a), problems such as excessively long time required for solidification or insufficient solidification can be effectively suppressed. it can. Further, when the component (b) is 8 mol or less with respect to 1 mol of the component (a), problems such as the component (b) not being dissolved in the component (a) and remaining can be effectively suppressed.

The mixing conditions (temperature, mixing time, mixing method, etc.) for reacting the (a) silane compound containing an amino group with the (b) boron compound can be appropriately selected. Under normal room temperature conditions, it becomes a clear, viscous liquid in minutes to tens of minutes and solidifies. Since the solidification time and the viscosity and rigidity of the obtained reaction product differ depending on the proportion of the boron compound, it is preferable to appropriately adjust these conditions according to the physical properties of the reaction product to be obtained and the purpose of use.

The boron compound (b) can be preferably used in the form of a boron compound alcohol solution dissolved in an alcohol having 1 to 7 carbon atoms. Examples of the alcohol having 1 to 7 carbon atoms include methyl alcohol, ethyl alcohol, various propyl alcohols, various butyl alcohols, and glycerin, but methyl alcohol, ethyl alcohol, and isopropyl alcohol are preferable. By using the alcohol solution, the time for dissolving the component (b) in the component (a) can be shortened. In terms of handling, it is preferable that the concentration of the boron compound in the alcohol is high.

The reaction product is preferably a reaction product obtained by reacting the component (a) and the component (b) without going through the step of adding water and hydrolyzing. At this time, since the step of adding water and hydrolyzing is not required, the above reaction product can be produced without requiring a complicated step such as sol / gel formation and without requiring a long time. it can.

(C) Organic Solvent The coating composition for wood and wood-based materials of the present invention contains an organic solvent from the viewpoints of reaction speed and uniformity, ease of coating coating and the like.
The organic solvent constituting the coating composition for wood and wood-based materials of the present invention contains an organic solvent having a specific composition, and more specifically (c) containing 10% by mass or more of a lower alcohol. In the coating composition for wood and wood-based materials of the present invention, the component (a) (silane compound containing an amino group) and the component (b) (boron compound) contain (c) 10% by mass or more of a lower alcohol. It is preferable to have a composition dissolved or dispersed in an organic solvent.
Here, the "lower alcohol" means an alcohol having 5 or less carbon atoms. Preferred examples of lower alcohols include methanol, ethanol, isopropanol, normal propanol, and normal butanol. Among the lower alcohols, those having 2 to 5 carbon atoms are preferable, and ethanol and normal propanol can be particularly preferably used.
In addition to the lower alcohol, the components constituting the organic solvent are not particularly limited, are liquid at room temperature, can be mixed with the lower alcohol, and have the above components (a) and (b), and if present, the above components. An organic solvent capable of dissolving or dispersing each of the other components described below can be appropriately used. For example, glycol ethers such as 3-methoxy-3-methyl-1-butanol, preferably glycol ethers having 6 or more carbon atoms can be used. The amount of glycol ether used is not particularly limited, but for example, when 3-methoxy-3-methyl-1-butanol is used, (c) 30 to 70% of the organic solvent may be mixed.

From the viewpoint of achieving high permeability to wood and / or wood-based materials, (c) the ratio of lower alcohol in the organic solvent is preferably 10% by mass or more, preferably 30% by mass or more in total. Is particularly preferred.
(C) There is no particular upper limit to the proportion of lower alcohol in the organic solvent, and the lower alcohol may occupy 100% by mass, but other solvents are appropriately mixed and the proportion of lower alcohol is, for example, 90 in total. It can be mass% or less, or 70 mass% or less.
For example, the above 3-methoxy-3-methyl-1-butanol has low volatility, so by replacing a part of the lower alcohol with this, workability is improved, pot life is extended, and it is released into the working environment. It is possible to reduce volatile substances.

The mechanism by which the permeability of the coating composition to wood and / or wood materials is improved when the proportion of the lower alcohol in the organic solvent is 10% by mass or more is not always clear, but the low viscosity brought about by the lower alcohol. , It is presumed that it has some relation with low surface tension.

(C) The amount of the organic solvent used is not particularly limited, and the reaction efficiency between the components (a) and (b) and other components, the efficiency and workability in coating, and the coating obtained can be obtained. It may be set appropriately while considering the quality of the solvent.
Assuming the general usage pattern of the coating for wood and wood-based materials, (c) the amount of the organic solvent used is preferably 30 to 90% by mass, preferably 50 to 90% by mass of the coating composition for wood and wood-based materials. More preferably, it is 75% by mass. In any amount, (c) the content of the lower alcohol in the organic solvent is 10% by mass or more, so that the coating for wood and wood materials of the present invention has permeability to wood and / or wood materials. Excellent for.

(D) Metal Alkoxide The coating composition for wood and wood-based materials of the present invention can preferably further contain (d) metal alkoxide (excluding those corresponding to the component (a)). Further, the polymer substance that can be formed by the reaction of the coating composition for wood and wood-based materials of the present embodiment has a polymer structure that is a reaction product of the above components (a) and (b), and further (d). ) It may have a structure modified with a metal alkoxide.
That is, the metal alkoxide (component (d)) can be added during or after the reaction of the components (a) and (b). By adding the component (d), the content of the metal salt in the obtained reaction product can be increased, the mechanical properties, chemical properties, etc. can be further improved, and the component (d) is not used. Since it can be in a viscous liquid state similar to the case, the properties and physical properties of the coating can be appropriately adjusted according to the application.

From the metal alkoxide of the component (d), the compound corresponding to the component (a) above (a silane compound having a specific structure and containing an amino group) is excluded. Other restrictions do not apply to the metal alkoxide of component (d), and unless the above component (a) applies, compounds generally classified as metal alkoxides, that is, at least one metal atom and at least one alkoxy. A compound having a group can be used as the metal alkoxide of the component (d).

Examples of the metal of the metal alkoxide of the component (d) include Si, Ta, Nb, Ti, Zr, Al, Ge, B, Na, Ga, Ce, V, Ta, P, Sb, and the like. Not limited to these. Si, Ti, and Zr are preferable because of the ease of forming an alkoxide, and Si and Ti are particularly preferable because the component (d) is preferably a liquid. Examples of the alkoxide (alkoxy group) of the metal alkoxide of the component (d) include an alkoxy group having methoxy, ethoxy, propoxy, butoxy, and more carbon atoms. Methoxy, ethoxy, propoxy, and butoxy are preferred, with methoxy and ethoxy more preferred. Particularly preferable component (d) includes tetramethoxysilane and tetraethoxysilane.
The component (d) may be a multimer, and for example, a pentamer of tetraethoxysilane can be preferably used. A monomer and a pentamer may be used in combination.

The amount of the component (d) used is not particularly limited and can be appropriately set according to the intended use of the coating to be obtained, desired properties, etc. For example, the ratio of 10 mol or less to 1 mol of the component (a). It is preferable to use in. More preferably, the ratio is 0.1 mol to 5 mol with respect to 1 mol of the component (a). By setting the component (d) to 0.1 mol or more with respect to 1 mol of the component (a), the effect of adding the component (d) as described above can be sufficiently exhibited. Further, by setting the component (d) to 10 mol or less, the occurrence of cloudiness and the like can be effectively suppressed.

(E) Surfactant A surfactant may be further added to the coating composition for wood and wood-based materials of the present invention for the purpose of improving wettability with a base material and improving leveling property. Further, by using a surfactant, the permeability to wood and / or wood-based materials can be further improved.
In the present invention, it is particularly beneficial to add a surfactant to improve the leveling property, since the smoothness of the coating layer surface may decrease due to permeation into wood and / or wood-based materials. The type of the surfactant is not particularly limited, and can be appropriately selected depending on the coating form of the coating and the affinity with other components, particularly (c) an organic solvent. The surfactant may be any of an anionic surfactant, a cationic surfactant, an amphoteric surfactant, and a nonionic surfactant.

From the viewpoint of improving leveling property and permeability, it is particularly preferable to use a fluorine-based surfactant, a silicone-based surfactant, an alkyl ether-based surfactant, or the like. Above all, it is preferable to use a fluorine-based surfactant from the viewpoint of improving permeability.
Specific examples of the preferable fluorine-based surfactant include "Surflon" series manufactured by AGC Seimi Chemical Co., Ltd., "Megafuck" series manufactured by DIC Corporation, and "Futergent" series manufactured by Neos Co., Ltd.

(E) The amount of the surfactant added is not particularly limited, and can be appropriately set according to the coating form of the coating, the physical properties required after curing, and the like.
Assuming the general usage pattern of the coating for wood and wood materials, (e) the amount of the surfactant used shall be 0.01 to 5.0% by mass of the coating composition for wood and wood materials. Is preferable, and 0.1 to 1.0% by mass is particularly preferable.

Synthetic Resin The coating composition for wood and wood-based materials of the present invention may further contain a synthetic resin in place of or in addition to the (d) metal alkoxide described above. That is, the synthetic resin can be added during or after the reaction of the components (a) and (b). By adding a synthetic resin, crack prevention and the like can be imparted to the obtained coating, and the coating composition of the present invention can be used, for example, as a resin hard coating agent.

The synthetic resin that can be used in the present invention is not particularly limited, and examples thereof include acrylic resin, epoxy resin, polyester resin, amino resin, urethane resin, and furan resin, and synthetic resins having various degrees of polymerization (molecular weight). Resin can be used. Further, vinyl ester resin, epoxy acrylate, dipentaerythritol hexaacrylate and the like can also be preferably used. Among them, (f) epoxy resin is preferably used from the viewpoint of properties as a resin such as strength, reactivity with other components, stability and the like.

(F) Epoxy resin The coating composition for wood and wood-based materials of the present invention may contain (f) epoxy resin in addition to the above components (a) to (c).
(F) The epoxy resin may be incorporated into a polymer structure composed of the above-mentioned components (a) and (b) to form a part of the polymer structure during curing, or the polymer structure may be formed. The chemical structure and physical properties of the reaction products of the components (a) and (b) can be changed by cross-linking the components (a) and (b). By containing (f) an epoxy resin in the coating composition for wood and wood-based materials of this embodiment, the chemical structure and physical properties of the reaction products constituting the coating after curing are affected, and the reaction of the coating It is possible to control physical properties and mechanical properties.

The (f) epoxy resin that can be preferably used in this embodiment is not particularly limited, and is cured by forming a crosslinked network with a resin classified as an epoxy resin in the art, that is, an epoxy group in a polymer structure. Any thermosetting resin that can be used may be used, and epoxy resins having various degrees of polymerization (molecular weight) can be used. Among them, at least selected from the group consisting of glycidyl ether type epoxy resin of bisphenol A or bisphenol F, hydrogenated bisphenol A type epoxy resin, glycidyl ester type epoxy resin, alicyclic epoxy resin, and polyglycol type epoxy resin. One kind of epoxy resin or the like can be preferably used.

(F) The amount of the epoxy resin added is not particularly limited, and can be appropriately set according to the coating form of the coating, the physical properties required after curing, and the like.
Assuming the general usage pattern of coatings for wood and wood-based materials, the amount of (f) epoxy resin used is preferably 1 to 30 g with respect to 1 g of the component (a), preferably 4 to 10 g. It is more preferable to have it. That is, if the amount of the component (f) added is not excessive, the decrease in hardness tends to be suppressed, and conversely, if it is not too small, the chemical durability tends to be easily maintained.

Silicone oil The coating composition for wood and wood-based materials of the present invention is used instead of the synthetic resin such as (d) metal alkoxide or (f) epoxy resin, or synthetic of (d) metal alkoxide or (f) epoxy resin or the like. In addition to the resin, silicone oil can be further included. That is, silicone oil can be added at the time of the reaction between the component (a) and the component (b), or after the reaction, in place of the component (d) or the like, or in addition to the component (d) or the like. By adding silicone oil, physical properties such as flexibility and hardness of the obtained coating can be appropriately adjusted.

Examples of the silicone oil used for the above purpose include methylpolysiloxane, methylphenylsilicone, etc., which are polymer substances having a siloxane bond and have various degrees of polymerization (molecular weight), and dimethylpolysiloxane (dimethylsilicone). ) Is preferable.

The amount of the silicone oil used for the above purpose is preferably 10 mol or less as the siloxane repetition unit of the silicone oil with respect to 1 mol of the component (a). More preferably, the ratio is 0.1 mol to 5 mol. When the siloxane repeating unit is 0.1 mol or more with respect to 1 mol of the component (a), the effect of adding the silicone oil as described above is easily obtained, and when the siloxane repeating unit is 5 mol or less, ( The effect of the reaction product of the component (a) and the component (b) on the function is limited.

Other Ingredients The coating composition for wood and wood-based materials of the present invention has at least one selected from the group consisting of corrosion inhibitors, inorganic nanoparticles, pigments, organic acids and mixtures thereof, in addition to the above-mentioned components. Ingredients may be added. Examples of the corrosion inhibitor include phosphoric acid, phosphorous acid, phosphonic acid, tannic acid and mixtures thereof. The use of corrosion inhibitors is also beneficial from the perspective of preventing corrosion of wood and / or wood-based materials.
The coating composition for wood and wood-based materials of the present invention can exhibit a function as a paint by adding a color-developing component such as a pigment.

Wood and wood materials The wood and wood materials to which the coating composition for wood and wood materials of the present invention is applied are not particularly limited and may be sawn (solid wood) or processed wood obtained by processing wood chips or fibers. Alternatively, it may be recycled wood obtained by solidifying wood powder with resin. The processed wood and recycled wood may be any of plywood, laminated wood, laminated wood, particle board, MDF and the like.
The tree species are not particularly limited, and either one type of wood such as cypress wood, cedar wood, hiba wood, oak wood, millet wood, zelkova wood, and Spanish mackerel wood, or a combination of two or more kinds of wood can be used. You may. Further, the site is not particularly limited, and the coating composition of the present invention can be applied to various sites such as straight grain, chasing grain, white thick, lean meat, and plate grain.
Since the coating composition for wood and wood-based materials of the present invention has excellent permeability to wood and / or wood-based materials, it can be used for compressed wood in which it is generally difficult for the coating agent to penetrate, and is desired on compressed wood. It is possible to realize a remarkable technical effect having high practical value that the coating layer of the above can be formed relatively easily.

Coated wood or wood-based material By applying the coating composition for wood and wood-based material of the present invention on wood or wood-based material and curing it, a coating (layer) is formed on the wood or wood-based material, and the coated wood. Alternatively, wood-based materials can be produced. Heating is not essential for curing, but the curing time can be shortened by heating.
More specifically, the coating composition for wood and wood-based materials of the present invention can be applied to the surface of wood or wood-based materials by methods such as dipping, spray coating, roll coating, and brush coating. A coating (layer) may be formed by one application, or a coating (layer) may be formed by repeating the application two or more times. When a coating (layer) is formed by repeating the coating two or more times, the coating composition may be cured after the coating and then further coated, or the coating is repeated without curing to all the coatings. The coating composition may be cured after the completion of.
The amount of the coating composition for wood and wood-based materials is not particularly limited, but is preferably 0.3 g to 10 g, preferably 0.5 g to 2.0 g, per 100 cm ² of the area of wood or wood-based material. Is particularly preferable, and 1.0 g or more is particularly preferable. The fact that the coating amount is 0.3 g or more per 100 cm ² of the area of the wood or wood material indicates that the coating composition has high permeability to the wood or wood material.

The thickness of the coating (layer) after curing is not particularly limited, and can be appropriately set according to the purpose of coating, required physical properties, usage mode of coated wood or wood-based material, etc., but is 5 μm or less. It is preferably 2 μm or less, and particularly preferably 2 μm or less.
The penetration depth of the coating layer into the wood or wood-based material is not particularly limited, but from the viewpoint of the stability and adhesion of the coating (layer), it is preferably 10 to 300 μm, preferably 50 to 200 μm. Is particularly preferred.

The coating composition for wood and wood-based materials of the present invention has high permeability as compared with the prior art, and a coating layer having a sufficient coating amount can be formed on wood and / or wood-based materials. As the coated wood or wood-based material according to one embodiment, wood or wood-based material is widely used from the viewpoint of aesthetics, texture, etc., and protection by coating is required, for example, furniture, architectural materials, stationery, tableware, sporting goods. Etc., it can be used particularly preferably.

Hereinafter, the present invention will be described in more detail with reference to Examples / Comparative Examples, but the present invention is not limited thereto.

In the following Examples / Comparative Examples, the physical properties / characteristics were evaluated by the following method.
Penetration (coating amount)
The coating compositions obtained in each Example and Comparative Example were applied onto a 10 × 10 × 1 cm size MDF (medium density fiber) board or solid wood to the extent that liquid did not collect, and dried at room temperature for 24 hours. did. Further, the same operation as the next day and the day after next was performed, and a total of 3 times of application and drying were performed.
The weight of the coated MDF board or solid wood after the third drying was measured, and the increase (g) from the initial weight was taken as the coating amount.
Magic penetration The coated surface of the coated MDF board or solid wood after the third drying is marked with oil-based magic, wiped with ethanol, and wiped off without leaving any visible contamination. Was evaluated as 〇 (pass).
Appearance (wooden texture)
The coated surface of the coated MDF board or solid wood after the third drying is visually judged for the texture of wood, and the one that maintains the texture of wood is 〇 (pass), and the one that loses the texture of wood (coated surface). (Whitening, etc.) was evaluated as × (failed).

(Example 1)
To 40 parts by mass of the γ-aminopropyltriethoxysilane solution as the component (a), 10 parts by mass of H ₃ BO ₃ powder as the component (b) was added, and after stirring for 5 minutes, tetraethoxysilane was added as the component (d). 70 parts by mass and 70 parts by mass of tetraethoxysilane pentamer as the component (d), further stirred for 5 minutes and left to stand, and then bisphenol A resin (CY232 manufactured by Nagase Chemtech Co., Ltd.) as the component (f). ) By 20 parts by mass, methanol as a component (c) by 420 parts by mass, and component (e) by 2 parts by mass of SZ-1919 (silicone-based surfactant, manufactured by Toray Dow Corning Co., Ltd.) and mixed. , The coating composition of Example 1 was prepared.
Using the obtained coating composition, a coating film is formed on an MDF board having a size of 10 × 10 × 1 cm according to the above method, and the permeability (coating amount), magic penetration, and appearance (woody texture) are evaluated. did.
The results are shown in Table 1.

(Example 2)
The coating composition of Example 2 was prepared and used in the same manner as in Example 1 except that 420 parts by mass of ethanol was added as the component (c) instead of methanol as the component (c). A coating film was formed on the MDF board, and the permeability (coating amount), magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

(Example 3)
The coating composition of Example 3 was prepared in the same manner as in Example 1 except that 420 parts by mass of normal propanol was added as the component (c) instead of methanol as the component (c). A coating film was formed on the MDF board and the permeability (coating amount), magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

(Example 4)
The coating composition of Example 4 was prepared and used in the same manner as in Example 1 except that 420 parts by mass of isopropanol was added as the component (c) instead of methanol as the component (c). A coating film was formed on the MDF board, and the permeability (coating amount), magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

(Example 5)
The coating composition of Example 5 was prepared in the same manner as in Example 1 except that 420 parts by mass of normal butanol was added as the component (c) instead of methanol as the component (c). A coating film was formed on the MDF board and the permeability (coating amount), magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

(Comparative Example 1)
The coating composition of Comparative Example 1 was prepared in the same manner as in Example 1 except that 420 parts by mass of MMB (3-methoxy-3-methyl-1-butanol) was added instead of methanol as a component (c). It was prepared, and a coating film was formed on the MDF board using the coating film, and the permeability (coating amount), magic penetration property, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

(Example 6)
The coating composition of Example 6 was prepared in the same manner as in Example 1 except that 210 parts by mass of ethanol and 210 parts by mass of MMB were added as the component (c) instead of methanol as the component (c). It was prepared, and a coating film was formed on the MDF board using the coating film, and the permeability (coating amount), magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

(Example 7)
The coating composition of Example 7 was prepared in the same manner as in Example 6 except that SZ-1919 as a component (e) was not added, and a coating film was formed on the MDF board using the coating composition. , Permeability (coating amount), magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

(Example 8)
Example 6 except that 2 parts by mass of Surflon S-611 (fluorine-based surfactant, manufactured by AGC Seimi Chemical Co., Ltd.) was added as the component (e) instead of SZ-1919 as the component (e). In the same manner as in the above, the coating composition of Example 8 is prepared, a coating film is formed on the MDF board using the coating composition, and the permeability (coating amount), magic penetration, and appearance (woody texture) are evaluated. did.
The results are shown in Table 1.

(Example 9)
Except for the addition of 2 parts by mass of Megafuck F-559 (fluorine-based surfactant, manufactured by DIC Corporation) as the component (e) in place of SZ-1919 as the component (e), as in Example 6. Similarly, the coating composition of Example 9 was prepared, and a coating film was formed on the MDF board using the coating composition, and the permeability (coating amount), magic penetration, and appearance (woody texture) were evaluated. ..
The results are shown in Table 1.

(Example 10)
Except for the addition of 2 parts by mass of Megafuck F-563 (fluorine-based surfactant, manufactured by DIC Corporation) as the component (e) in place of SZ-1919 as the component (e), as in Example 6. Similarly, the coating composition of Example 10 was prepared, and a coating film was formed on the MDF board using the coating composition, and the permeability (coating amount), magic penetration, and appearance (woody texture) were evaluated. ..
The results are shown in Table 1.

(Example 11)
In the same manner as in Example 6 except that 2 parts by mass of TFS4440 (polyether-modified siloxane, manufactured by Momentive Performance Materials Inc.) was added as the component (e) in place of SZ-1919 as the component (e). , The coating composition of Example 11 was prepared, and a coating film was formed on the MDF board using the coating composition, and the permeability (coating amount), magic penetration property, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

(Example 12)
In the same manner as in Example 6 except that 2 parts by mass of KP-431 (silicone mixture, manufactured by Shin-Etsu Chemical Co., Ltd.) was added as the component (e) in place of SZ-1919 as the component (e). , The coating composition of Example 12 was prepared, and a coating film was formed on the MDF board using the coating composition, and the permeability (coating amount), magic penetration property, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

(Example 13)
In the same manner as in Example 6 except that 2 parts by mass of Emargen 106 (polyoxyethylene lauryl ether, manufactured by Kao Corporation) was added as the component (e) instead of SZ-1919 as the component (e). , The coating composition of Example 13 was prepared, and a coating film was formed on the MDF board using the coating composition, and the permeability (coating amount), magic penetration property, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

(Example 14)
(E) The coating composition of Example 14 was prepared in the same manner as in Example 6 except that the amount of SZ-1919 added as a component was changed to 8 parts by mass, and the coating composition was used to coat the MDF board. A film was formed, and the permeability (coating amount), magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 1.

From the comparison between Examples 1 to 5 and Comparative Example 1, it can be seen that the use of the lower alcohol improves the permeability of the coating composition into the wood material. Further, from the comparison of Example 2, Example 6 and Comparative Example 1, it can be seen that the permeability can be controlled by adjusting the content of the lower alcohol. Furthermore, by referring to Examples 8 and subsequent examples together, the permeability can be controlled (improved in many cases) by adding a surfactant, and in particular, the permeability can be significantly increased by adding a fluorine-based surfactant. It can be seen that it can be improved.

(Example 15)
A coating film was formed on the WRC material and penetrated in the same manner as in Example 6 except that the coating composition of Example 6 was used and a WRC (Western Red Cedar) material was applied instead of the MDF board. The properties (coating amount), magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 2.

(Example 16)
A coating film was formed on the cypress material in the same manner as in Example 6 except that the coating composition of Example 6 was used and the cypress material was applied instead of the MDF board, and the permeability (coating amount) was formed. , Magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 2.

(Example 17)
Using the coating composition of Example 6, a coating film was formed on the pine material in the same manner as in Example 6 except that the pine material was applied instead of the MDF board, and the permeability (coating amount) was formed. ), Magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 2.

(Example 18)
By using the coating composition of Example 6, a coating film was formed on the cedar material in the same manner as in Example 6 except that the cedar material was applied instead of the MDF board, and the permeability (coating amount). ), Magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 2.

(Example 19)
By using the coating composition of Example 6, a coating film was formed on the ipe material in the same manner as in Example 6 except that the ipe material was applied instead of the MDF board, and the permeability (coating amount) was formed. ), Magic penetration, and appearance (woody texture) were evaluated.
The results are shown in Table 2.

It can be seen that the coating composition for wood and wood-based materials of the present invention is a suitable coating composition having excellent permeability, stain resistance and the like even for various solid woods which are typical woods.

The coating compositions for wood and wood-based materials of the present invention, and coated wood or wood-based materials, provide appropriate coating amounts based on appropriate permeability to wood and / or wood-based materials, while organic silane compounds and boron. Since it is possible to realize a coating having high hardness, scratch prevention, waterproofness, antifouling property, etc. derived from a polymer substance obtained by reacting with a compound, it is possible to realize a coating in industries such as construction, construction, and furniture manufacturing. It has high availability in each field.

Claims

(A) Silane compound containing an amino group represented by the following formula R 4-n- Si- (OR') n
(In the formula, R represents an amino group-containing organic group, and when a plurality of them are present, they may be the same or different from each other, and R'represents a methyl group, an ethyl group or a propyl group, and there are a plurality of them. In some cases, they may be the same or different from each other, and n represents an integer selected from 1 to 3);
(B) At least one boron compound selected from the group consisting of H 3 BO 3 and B 2 O 3 ; and (c) an organic solvent containing 10% by mass or more of a lower alcohol;
A coating composition for wood and wood-based materials containing.
The coating composition for wood and wood-based materials according to claim 1, wherein the organic solvent containing 10% by mass or more of the lower alcohol (c) contains 30 to 90% by mass of the lower alcohol.
The coating composition for wood and wood-based materials according to claim 1 or 2, wherein the lower alcohol has 2 to 5 carbon atoms.
The coating composition for wood and wood-based materials according to any one of claims 1 to 3, wherein the organic solvent containing 10% by mass or more of the lower alcohol (c) further contains glycol ether.
The coating composition for wood and wood-based materials according to any one of claims 1 to 4, wherein the component (a) and the component (b) can form a reaction product having a polymer structure.
The coating composition for wood and wood-based materials according to any one of claims 1 to 5, further containing (d) a metal alkoxide (excluding those corresponding to the component (a) above).
The coating composition for wood and wood-based materials according to any one of claims 1 to 6, further containing (e) a surfactant.
The coating composition for wood and wood-based materials according to claim 7, wherein the (e) surfactant contains at least one fluorine-based surfactant.
The coating composition for wood and wood-based materials according to any one of claims 1 to 8, further containing (f) an epoxy resin.
A coating obtained by curing the coating composition for wood and wood-based materials according to any one of claims 1 to 9.
A coated wood or wood-based material having the coating according to claim 10 and wood and / or wood-based material.
The coated wood or wood material according to claim 11, wherein the wood and / or wood material includes solid wood.
A method for producing coated wood or wood-based material, which comprises a step of applying the coating composition for wood and wood-based material according to any one of claims 1 to 9 to wood or wood-based material.
The method for producing a coated wood or wood-based material according to claim 13, wherein the wood or wood-based material is solid wood.
Furniture, architectural elements, stationery, tableware, or sporting goods having the coated wood or wood-based material according to claim 11 or 12.
A method for manufacturing furniture, architectural elements, stationery, tableware, or sporting goods, which comprises a step of manufacturing coated wood or wood-based material by the method according to claim 13 or 14.