JPH06270107A - Wooden door for outdoor use and manufacture thereof - Google Patents

Abstract

PURPOSE:To eliminate defects such as warp, distortion and crack to be generated with the elapse of time in a wooden door for outdoor use. CONSTITUTION:A wooden door for outdoor use is made of a wooden door member which is coated with a chemical consisting of a cyclic ester compound such as beta-propiolactone, beta-valerolactone, and epsilon-caprolactone, having a coated film of a weather resistant coating consisting of acrylic urethane, acrylic silicone, and urethane modified fluorine resin formed thereon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is directed to warpage that occurs over time,
The present invention relates to an outdoor wooden door that is excellent in durability and prevents rolling and cracking, and a manufacturing method thereof.

Wooden doors conventionally used for outdoor use are
Depending on the environment in which it is used, there are cases in which warping, carving, cracking, etc. occur over time. As one means for preventing these problems, a solution has been attempted by coating or impregnating polyethylene glycol or an acrylic modified product thereof. However, due to their large molecular weight, these are not suitable for treating the inside of wood. There were problems such as difficulty and leaching after processing.

As a method for solving the above problems, the inventors of the present invention applied a cyclic ester compound to the surface of an unpainted door to cause esterification or etherification with wood and at the same time polymerize in wood. It was found that, as a result, the warp, wheel, crack, etc. that occur over time in the door are significantly suppressed as a result.

In the presence of water or a suitable catalyst, the cyclic ester compound causes a ring-opening reaction and a polymerization reaction at the same time as in the formula 1 shown below to form a polyester.

[Formula 1]

Also, when the reaction is carried out in wood,
Easily reacts with hydroxyl groups in wood, causing esterification and etherification.

This reaction occurs not only in the monomer state but also with the polymer represented by the formula (1). Doors that have been modified by such reactions have significantly suppressed warpage, wheeling, cracking, etc. that occur over time.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, according to the present invention, a wooden door member is coated with a chemical agent composed of a cyclic ester compound such as β-propiolactone, δ-valerolactone, ε-caprolactone, and the like. , A weather-resistant coating film made of urethane-modified fluororesin or the like is formed, and in obtaining an outdoor wooden door, the following (1) to
It is characterized by including the step (3).
(1) A step of applying a chemical comprising a cyclic ester compound such as β-propiolactone, δ-valerolactone, ε-caprolactone to a wooden door member, (2) a step of treating the coated surface at room temperature or under heating. (3) A step of coating the treated surface with a weather-resistant paint made of acrylic urethane, acrylic silicone, urethane-modified fluororesin, or the like.

As the wooden door member used in the present invention, a member to be used for outdoor wooden doors or a base material after assembly can be applied.

The drug used in the present invention is, for example, β
Cyclic ester compounds such as -propiolactone, δ-valerolactone, ε-caprolactone, coumarin, tetronic acid, pyrone and phthalide, and derivatives thereof.
A catalyst, a solvent, etc. are appropriately added. Considering cost and reactivity, β-propiolactone and ε-caprolaton are preferable, but not limited thereto.

The above-mentioned compounds react sufficiently without using a catalyst, but a small amount of catalyst may be added in order to carry out the reaction more rapidly and efficiently. As the type of catalyst, the following anionic polymerization catalysts, cationic polymerization catalysts, coordination anionic polymerization catalysts, and the like can be used, but are not particularly limited thereto.

As the anionic polymerization catalyst, for example,
Alkali metals, or hydrides of alkali metals, hydroxides, carbonates, acetates, alkyl metals, aliphatic amines, and the like, specifically, lithium, sodium, potassium, lithium hydride, sodium hydride, Examples thereof include potassium hydride, sodium hydride, potassium hydroxide, potassium carbonate, sodium acetate, alkyl lithium, alkyl sodium, methylamine, ethylamine, and α-naphthyl sodium.

Examples of the cationic polymerization catalyst include, for example,
Examples thereof include acids and metal halides, and specific examples thereof include hydrochloric acid, sulfuric acid, phosphoric acid, toluenesulfonic acid, oxalic acid, and aluminum chloride.

The coordination anion type polymerization catalyst includes, for example, a compound of a metal such as zinc and magnesium and an alkyl, a halogenated alkyl metal, an alkoxide and the like. Specific examples thereof include alkylzinc, alkylmagnesium and halogen. Examples thereof include alkyl magnesium halides, alkyl aluminum halides, sodium alkoxides, lithium alkoxides, aluminum alkoxides, and magnesium alkoxides.

In consideration of cost, the chemical may be diluted with various solvents to control the amount of wood impregnated. At this time, it is better that the solvent has low reactivity with the drug, and specifically, it is an aliphatic hydrocarbon such as hexane and heptane octane, an aromatic hydrocarbon such as benzene, toluene and xylene, diethyl ether, diisopropyl ether, tetrahydrofuran and dioxane. Examples include ethers such as ethyl acetate, esters such as ethyl acetate and butyl acetate, and ketones such as acetone, methyl ethyl ketone, and methylisobutyl ketone, but the reactivity of water and alcohols with drugs is not so high at room temperature. Therefore, these can also be used, but the invention is not particularly limited thereto.

The wooden door member treated according to the present invention comprises:
First, its water content is adjusted. The water content can be adjusted by air-drying,
It is desirable to set the water content to 5 to 15% (weight%, the same applies below) by heating and drying, and if the water content exceeds 15%, the door after treatment tends to be warped or deformed, and the water content is increased. If it is less than 5%, the cost required for drying becomes high and the cost merit becomes small.

Next, a drug, a drug to which a catalyst is added,
Alternatively, a solution obtained by diluting these with a solvent or the like is applied. At this time, the treatment concentration is 10 to 100%, preferably 20 to 5
It is 0%, and if it is less than 20%, a sufficient treatment effect cannot be obtained, and if it exceeds 50%, the increase of the treatment effect is small.

As a coating means, a coating device such as brush coating, spray coating, dipping, flow coater or roll coater can be used, but brush coating or spray coating is preferable in consideration of workability and coating efficiency. . The coating amount is about 50 to 500 g / m ² , preferably 100 to 3
It is 50 g / m ² , and if it is less than 100 g / m ² , a sufficient treatment effect cannot be obtained, and if it exceeds 350 g / m ² , the treatment effect hardly increases.

After the application, it is cured by heating or at room temperature. When performing the heat treatment, hot air heating, infrared ray or far infrared ray heating, a hot press, a high-frequency heater, or the like can be used as the treatment device, but the treatment device is not particularly limited thereto. The heating temperature is 20 to 200 ° C., and the processing time is 0.
~ 72 hours, but the processing temperature is 20 ~ 1 in order to process efficiently and without damaging the wood.
A range of 00 ° C is desirable. Further, curing is possible at room temperature, and the ambient temperature at this time is preferably 15 to 35 ° C.

After being treated in this way, a coating is applied with a weather resistant paint made of acrylic urethane, acrylic silicone, urethane-modified fluororesin or the like. Further, in order to prevent deterioration of the coating film due to ultraviolet rays, an ultraviolet absorber or the like may be added if necessary. Commercially available products of these weather resistant paints include, for example, acrylic urethane-based weather resistant paints such as Neoure (manufactured by East Japan Paint Co., Ltd.), polyurethane ace (manufactured by Kansai Paint Co., Ltd.), Camustron (camus). Co., Ltd.), Polydule (Mikuni Paint Co., Ltd.), Acrylic silicone type weather resistant paint, wasin rack (Washin Chemical Industry Co., Ltd.), Silicon Top (Nippon Paint Co., Ltd.), Hi-Ten Top (manufactured by Shinto Paint Co., Ltd.), Berthite (Nippon Yushi Co., Ltd.)
As a weather-resistant coating of urethane-modified fluororesin,
New Garmet (manufactured by Toa Paint Co., Ltd.), Aresflon (manufactured by Kansai Paint Co., Ltd.), Lumiflon (manufactured by Asahi Glass Co., Ltd.), Floren (manufactured by Nippon Synthetic Rubber Co., Ltd.), Fluoronate K-700 (Dainippon Ink Co., Ltd.) (Manufactured by K.K.) is recommended, but the invention is not limited to these.

When the weather resistant paint as described above is used for coating, the thickness of the coating film is preferably about 50 to 200 μm.
If it is thinner than 0 μm, sufficient weather resistance cannot be obtained,
When it is thicker than m, the degree of improvement in weather resistance is small.

[0021]

The mechanism for suppressing the occurrence of warp, wrapping and cracking of the outdoor wooden door in the present invention is to introduce a cyclic ester compound having a strong affinity for wood into the wood and then heat or cure the wood at room temperature. After the ring-opening of the cyclic ester compound inside, not only the etherification or ester reaction to the wood but also the polymerization reaction of the cyclic ester compound itself and the graft reaction to the wood are easily performed.

The etherified or esterified product produced by such a reaction, and the polyester or grafting polymer become chemically and physically stable,
It has the effect of suppressing the ingress and egress of bound water in the wood and overcoming the defects of the door such as warpage, wrapping and cracking over time.

Further, it is coated with a paint having weather resistance, damage to the coating film or wood due to rain, wind, infrared rays, ultraviolet rays, etc. is remarkably suppressed, and sufficient weather resistance is given by the synergistic effect of these.

Hereinafter, examples and comparative examples will be described in detail.

【Example】

Example 1 Preparation of Treatment Agent 400 g of β-propiolactone was added to acetone 6 as a solvent.
00 g and 2 g of sodium hydroxide as a catalyst are added,
A treating agent (A) was obtained.

A coating amount of 150 g of the treating agent (A) was applied to a wooden door member made of Niyato material whose water content was adjusted to 10%.
It was applied using a brush so that it would be / m ² . Then, after heat-treating at 80 ° C. for 3 hours using a hot air dryer, a urethane-modified fluororesin-based weather-resistant paint (trade name: Lumiflon, manufactured by Asahi Glass Co., Ltd.) was used to obtain a coating film thickness of 100 μm.
To obtain an outdoor wooden door (A).

Example 2 Preparation of treating agent 200 g of ε-caprolactone was used as a solvent and 80 parts of toluene was used.
0 g and 3 g of 35% hydrochloric acid as a catalyst were added to obtain a treating agent (B).

Example 2 The treatment agent (B) was applied to a wooden door member of the same quality as in Example 1 by spraying so that the coating amount was 300 g / m ² .
Then, after curing at room temperature (25 ° C.) for 24 hours, a urethane-modified fluororesin-based weather resistant coating (trade name: Lumiflon, manufactured by Asahi Glass Co., Ltd.) was used to obtain a coating film thickness of 100 μm.
To obtain an outdoor wooden door (B).

Example 3 The treatment agent (A) was applied to a wooden door member of the same quality as in Example 1 by using a brush so that the coating amount was 200 g / m ² . Then, after heat treatment at 40 ° C. for 5 hours, acrylic silicone
An outdoor wooden door (C) was obtained by applying a weather-resistant paint of the following type to a thickness of 120 μm.

Example 4 The treatment agent (B) was applied to a wooden door member of the same quality as in Example 1 using a brush so that the coating amount was 400 g / m ² . Then, after curing at 30 ° C. for 6 hours, coating was performed using an acrylic urethane type weather resistant coating so that the thickness of the coating film was 120 μm, and an outdoor wooden door (D) was obtained.

Comparative Example 1 A wooden door member of the same quality as in Example 1 was coated with an acrylic urethane weather resistant coating so that the coating film had a thickness of 100 μm to obtain an untreated door (A).

Comparative Example 2 A wooden door member of the same quality as in Example 1 was coated with a urethane-modified fluororesin-based weather-resistant coating (trade name: Lumiflon, manufactured by Asahi Glass Co., Ltd.) so that the coating film had a thickness of 100 μm. To obtain an untreated door (B).

The results are shown in Table 1.

[Table 1]

The evaluation method was as follows. Durability test Outdoor wooden doors (A)-(D), untreated doors (A)-
(B) Each of the 10 sheets was exposed outdoors for 1 year under the condition of the southern surface at 45 degrees, and the occurrence status of defects such as cracking and warping was confirmed. As for the degree of cracking, the number of cracks in the untreated door (A) was set to 100 and the numbers of cracks in the outdoor wooden doors (A) to (D) and the untreated door (B) were compared. The warp represents the degree per 1000 mm in width.

As is clear from the results shown in Table 1, the outdoor wooden doors treated with the chemical agent of the cyclic ester compound have markedly suppressed defects such as cracking and warpage over time as compared with the untreated doors. Not only is there no peeling of the coating film after the exposure, it can be seen that the durability is improved.

[0035]

Industrial Applicability As described above, the outdoor wooden door found by the present invention is coated with a chemical agent consisting of a cyclic ester compound, which reacts in the wood tissue and becomes stable, which makes it difficult to use outdoors. Even when placed underneath, the tree tissue is less likely to expand and contract or deform, and the occurrence of defects such as warpage, wrapping, and cracking has been significantly suppressed.

The outdoor wooden door causes an etherification reaction or esterification reaction with wood, and since polyester is formed in the wood and grafted with the wood, leaching of water, alcohol and the like occurs. It also has the effect of becoming extremely stable both chemically and physically.

Further, by being coated with a coating having weather resistance, deterioration of the surface due to rain, wind, infrared rays, ultraviolet rays, etc. is prevented, and cracking and peeling of the coating film are prevented,
It can be used indoors as well, because the change over time becomes extremely small and the commercial value is not impaired.

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI Technical display area E06B 3/70 Z

Claims (2)

[Claims] 1. A wooden door member is coated with a chemical agent comprising a cyclic ester compound such as β-propiolactone, δ-valerolactone, ε-caprolactone, etc., and is made of acrylic urethane, acrylic silicone, urethane-modified fluororesin, etc. A wooden door for outdoor use, which is characterized by the formation of a paint film of a conductive paint. 2. A method for producing an outdoor wooden door, which comprises the following steps (1) to (3) in obtaining the outdoor wooden door. (1) A step of applying a chemical comprising a cyclic ester compound such as β-propiolactone, δ-valerolactone, ε-caprolactone to a wooden door member, (2) a step of treating the coated surface at room temperature or under heating. (3) A step of coating the treated surface with a weather-resistant paint made of acrylic urethane, acrylic silicone, urethane-modified fluororesin, or the like.