JP2002264110A - Synthetic wood - Google Patents

Abstract

(57) [Problem] The present invention relates to synthetic wood, which improves antifouling properties and generates a smell that repels unpleasant pests such as cockroaches, or a scent that is favorable to users. It provides synthetic wood that is generated. SOLUTION: A resin component 6, a filler 1, an additive 2 having a surface free energy smaller than the surface free energy of the resin component 6, a substance 3 that evaporates odor, an inorganic antibacterial agent 4, and an organic antibacterial agent 5. And synthetic wood containing
Thereby, the antifouling property of the synthetic wood is improved, and a hygienic and comfortable synthetic wood having pest repellent performance is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention is excellent in stain resistance,
Further, the present invention relates to synthetic wood that emits an odor that repels unpleasant pests such as cockroaches, or synthetic wood that emits a scent favorable to a user.

[0002]

2. Description of the Related Art Wood has long been used as a building material in various parts. Although it is easy to process and lightweight, it has strength, and the unique texture of natural wood has been especially valued in Japan. However, in recent years, the massive logging of rainforest timber and the development of forests have been linked to the serious fact that the habitat of living organisms has been destroyed and the living environment of the earth has been rapidly degraded, and in particular Japan's timber consumption must be reduced There is a growing demand. In line with such social demands, effective use of resources has been achieved by blending and molding wood powder, which is discharged in large quantities as waste from wood processing factories, into synthetic wood molded products. . Furthermore, scraps generated when using composite materials typified by such synthetic wood molded products, and the collected products obtained by collecting these materials after use are crushed or crushed, and the obtained chip-shaped Thorough and effective use has been made, for example, by compounding a resin component with a resin component and molding it into a synthetic wood molded product again.

[0003] Synthetic wood is relatively inexpensive, lightweight, strong and workable, so it is used for exterior products, verandas, solariums, window frames, doors and building walls, flooring, electrical and electronic equipment. It is used for other product cases. In recent years, it has been widely used as a component of water products in the home, especially in the kitchen. Depending on their use, they can easily become dirty, causing bacteria and mold to multiply on the dirt and produce odors. A source,
They may be damaged by cockroaches and other invasive pests. For this reason, it is a cause of impairing the cleanliness of the water area around the kitchen, which should be clean.

[0004]

In recent years, along with the diversification of lifestyles, the consciousness of cleanliness has spread among young people, especially among young people. However, products made of synthetic wood, such as storage boxes used in places around water such as kitchens, washrooms, and bathrooms, are particularly prone to cockroaches and other unpleasant pests due to their abundant food and water. Is easily attracted. In addition, these products are liable to be stained, and bacteria and mold grow on the dirt as a feed, which is a source of foul odor, and there are problems in appearance and hygiene.

[0005]

In order to solve the above-mentioned problems, the present invention provides a resin component, a filler, an additive having a surface free energy smaller than the surface free energy of the resin component, and a substance that evaporates odor. It is a synthetic wood containing.

According to the above invention, the surface of synthetic wood is reduced in surface free energy by the effect of adding a substance having a small surface free energy, the water repellency is improved, and the interaction with dirt components is reduced, thereby preventing the surface of the synthetic wood. Significantly improved fouling. Bacteria and mold also have a small amount of adhered dirt components serving as their baits, so that their growth is also suppressed. Furthermore, by incorporating a substance that emits an odor into synthetic wood, it is possible to obtain synthetic wood that emits a fragrance favorable to the user. In addition, by incorporating a substance that emits an odor that has pest repellency into synthetic wood, synthetic wood having cockroaches and other unpleasant pest repellent properties can be obtained. In addition, by incorporating in the synthetic wood both a substance that emits odors and a substance that evaporates gas that has repellent pest repellency, a user-friendly scent is generated, and repellent to cockroaches and other unpleasant pests A clean and comfortable synthetic wood having properties can be obtained.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention may be applied to interior products such as exterior products, door materials, floor materials, and plumbing products such as kitchens, washrooms, and bathrooms in the form described in each claim. Can be.

That is, the invention according to claim 1 is a synthetic wood containing a resin component, a filler, an additive of a substance whose surface free energy is smaller than the surface free energy of the resin component, and a substance that evaporates odor. Things. Since the synthetic wood according to the embodiment of the present invention includes an additive whose surface free energy is smaller than the surface free energy of the resin component, the surface of the synthetic wood has improved water repellency, and thus has a stain. The activity becomes low with respect to the components, and the dirt components do not easily adhere. Furthermore, bacteria and mold also have a small amount of adhered dirt components serving as baits thereof, so that their growth is suppressed. And since the substance which evaporates an odor is a volatile aromatic substance, it becomes synthetic wood which generates a fragrance favorable to a user. In addition, since the substance that evaporates the odor is a volatile substance that masks a bad smell, the synthetic wood is comfortable for the user. In addition, since the substance that evaporates the odor is a volatile pest repellent, synthetic wood having repellency against cockroaches and other unpleasant pests is obtained.

According to a second aspect of the present invention, there is provided a synthetic wood containing a resin component, a filler, an additive of a substance having a surface free energy smaller than the surface free energy of the resin component, a substance that evaporates odor, and an antibacterial agent. It is what it was. Synthetic wood according to the embodiment of the present invention according to the second aspect of the present invention has a surface free energy of synergistic effect of the effect of adding a smaller substance to prevent stains and the effect of adding an antibacterial agent, so that both stain components, bacteria and mold are positively active. Sanitary synthetic wood that does not proliferate naturally can be obtained.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the additive of the substance having a smaller surface free energy of the resin component is at least one selected from the group of organic silicon compounds. Due to the extremely low surface free energy effect of the organosilicon compound, the water repellency of the synthetic wood surface can be significantly improved with a smaller amount of addition.

According to a fourth aspect of the present invention, in the first or the second aspect of the present invention, the additive of a substance having a smaller surface free energy of the resin component is at least one selected from the group of organic fluorine compounds. Due to the extremely low surface free energy effect of the organic fluorine compound, the water repellency of the synthetic wood surface can be greatly improved with a smaller amount of addition.

According to a fifth aspect of the present invention, in the second aspect, at least one of an inorganic antibacterial agent and at least one of an organic antibacterial agent are added as the antibacterial agent. By the action of, mainly the growth of bacteria is effectively suppressed, and furthermore, the generation of offensive odor due to the growth of bacteria is also suppressed. In addition, the action of the organic antibacterial agent effectively suppresses the growth of mold mainly. As described above, the generation of mold, bacteria, and odors is suppressed, and a fragrance is generated which is favorable to the user, and a hygienic and comfortable synthetic wood having repellency against unpleasant pests such as cockroaches is obtained.

According to a sixth aspect of the present invention, in the first or second aspect, the filler is selected from the group consisting of cellulosic crushed materials such as wood flour, organic fibers, inorganic fibers, chips, and calcium silicate. By adding at least one of these, a synthetic wood excellent in texture, lightweight, and strong in practicability due to these fillers is obtained.

The invention according to claim 7 is the invention according to claim 1 or 6, wherein the substance that evaporates the odor is at least one selected from the group consisting of a natural essential oil having pest repellency and a pyrethroid-based substance. Thereby, it becomes a synthetic wood which has effectively pest repellency such as cockroaches.

According to an eighth aspect of the present invention, in accordance with the first or second aspect of the present invention, since the substance that evaporates the odor is a fragrance, it is a comfortable synthetic wood that generates a fragrance favorable to the user.

According to a ninth aspect of the present invention, in the first or the second aspect of the invention, the resin component is at least one of a thermoplastic resin and a thermosetting resin, so that the texture and mechanical strength can be adjusted according to the intended use. And it becomes practical synthetic wood having thermal strength and the like.

The resin component in the present invention includes:
Examples of the thermoplastic resin include, but are not limited to, polyethylene, polystyrene, polyvinyl chloride, and polypropylene. In addition, examples of the thermosetting resin include a phenol resin, a urea resin, a melamine resin, an unsaturated polyester resin, an epoxy resin, a urethane resin, and a thermosetting acrylic resin, but are not limited thereto. Also, phenolic resin as thermosetting resin,
Examples include, but are not limited to, urea resins, melamine resins, unsaturated polyester resins, epoxy resins, urethane resins, thermosetting acrylic resins, and the like.

Examples of the filler in the present invention include cellulosic crushed substances such as wood flour and chip-like substances generated during processing of a composite material represented by natural wood or synthetic wood. Further, there may be mentioned scrap materials generated when the above-mentioned natural wood or composite material is used, and substances obtained by crushing or pulverizing a collected product obtained by collecting these materials after use. Further, organic fibers, inorganic fibers, calcium silicate, and the like can also be used.

The organic silicon compound in the present invention includes
Silicone compounds such as dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, and methylhydrogenpolysiloxane; These silicone compounds are alkyd-modified, polyester-modified,
Examples include, but are not limited to, acrylic-modified and epoxy-modified silicone compounds.
Examples of the alkylsilane compound include trimethylmethoxysilane, trimethylethoxysilane (hereinafter, methoxy may be ethoxy or chloro), dimethyldimethoxysilane, methyltrimethoxysilane, methyldimethoxysilane, dimethylmethoxysilane, diphenyldimethoxysilane, Examples include, but are not limited to, phenyltrimethoxysilane.

Examples of the organic fluorine compound include polytetrafluoroethylene, tetrafluoroethylene / perfluoroalkylvinyl ether copolymer, tetrafluoroethylene / hexafluoropropylene copolymer, tetrafluoroethylene / ethylene copolymer, and polychlorotrifluoro. Ethylene, polyvinylidene fluoride, tetrafluoroethylene / hexafluoropropylene / perfluoroalkylvinyl fluoride, vinylidene fluoride / tetrafluoroethylene copolymer, polyvinyl ether fluoride, vinyl fluoride / tetrafluoroethylene copolymer, vinylidene fluoride・ Tetrafluoroethylene ・
Hexafluoropropylene copolymer, vinylidene fluoride-hexafluoropropylene copolymer. Fluorine oils such as perfluoropolyethers, perfluoroalkyl polyethers, and ethylene trifluoride polymers. In addition, a fluorine-based surfactant may be used, but the present invention is not limited thereto. Further, the perfluoroalkylsilane compound is a compound in which some of the alkyl groups of the above-mentioned alkylsilane compound are substituted with a fluorocarbon group. For example, CF ₃ (CH ₂ ) ₂ Si (OCH ₃ ) ₃ , CF _Three
(CF ₂ ) ₅ (CH ₂ ) ₂ Si (OCH ₃ ) ₃ , CF ₃ (C
F ₂ ) ₇ (CH ₂ ) ₂ Si (OCH ₃ ) ₃ , CF ₃ (CF ₂ ) ₇
(CH ₂ ) ₂ SiCH ₃ (OCH ₃ ) ₂ , CF ₃ (CF ₂ )
₃ (CH ₂ ) ₂ Si (OCH ₃ ) ₃ , CF ₃ (CF ₂ ) ₇ (CH
₂ ) ₂ Silanes having 1 to 20 carbon atoms, such as SiCl _3, are exemplified, but not limited thereto.

The substance that evaporates odors in the present invention includes phytontide, which is an aromatic substance released or secreted from trees and plants as natural essential oils, and α-
Terpenes such as pinene, β-pinene, myrcene, camphene, limonene and the like can be mentioned. Further, pyrethroid-based substances include ethophene block (1- (p-ethoxyphenyl) -2-methylpropyl-3-phenoxybenzyl ether) and cyphenothrin ((RS) -alpha-cyano-3-phenoxybenzyl (1R)). -Cis / trans-chrysanthemate), permethrin (3-phenoxybenzyl-di-cis / trans-3 (2,2-
Dichlorovinyl) -2,2-dimethyl-1-cyclopropanecarboxylate), allethrin (3-allyl-2)
-Methylcyclopenta-2-en-4-one-1-ylchrysanthemate) and the like, but is not limited thereto. Examples of fragrances that generate a favorable scent for the user include 6-acetyl-1,1,2,4,4,7-hexamethyltetrahydronaphthalene, γ-ound decalactone, ethyl caproate, ethyl caprylate, cinnamon alcohol, Examples include, but are not limited to, geranyl acetate, isoamyl acetate, and the like.

The antibacterial agent in the present invention includes silver nitrate, silver sulfate, silver chloride and the like as inorganic antibacterial agents. Silver, copper ,,
Zeolite carrying zinc or tin, and silver,
Examples include, but are not limited to, silica gel supporting copper, zinc, or tin.

Examples of the organic antibacterial agent include phenyl ether derivatives such as 10,10'-oxybisphenoxaarsine, N-haloalkylthio compounds such as cyclofluanide, and 2- (4-thiazolyl) benzimidazole (TB).
Z), and quaternary ammonium salts such as 2,3,5,6 tetracolor-4- (methylsulfolyl) pyridine, but are not limited thereto.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments.

Example 1 100 parts by weight of an unsaturated polyester resin comprising a mixture of an isophthalic unsaturated polyester and styrene, 3 parts by weight of a curing catalyst (50% benzoyl peroxide), and a curing accelerator (dimethylaniline) 0.
03 parts by weight, 200 parts by weight of wood flour, 1 part by weight of methacryl-modified organopolysiloxane, and 1 part by weight of permethrin (a pest repellent) were sufficiently stirred and mixed with a kneader. The mixture was inserted into a mold and cured to obtain a synthetic wood molded body.

Example 2 100 parts by weight of an unsaturated polyester resin comprising a mixture of an unsaturated polyester of an isophthalic acid type and styrene, 3 parts by weight of a curing catalyst (50% benzoyl peroxide), and a curing accelerator (dimethylaniline) 0.
03 parts by weight, wood flour 200 parts by weight, perfluoroalkyl acrylate 1 part by weight, and hinokitiol 1 part by weight were sufficiently stirred and mixed with a kneader. The mixture was inserted into a mold and cured to obtain a synthetic wood molded product.

Example 3 100 parts by weight of an unsaturated polyester resin composed of a mixture of an isophthalic unsaturated polyester and styrene, 3 parts by weight of a curing catalyst (50% benzoyl peroxide), and a curing accelerator (dimethylaniline) 0.
03 parts by weight, wood flour 200 parts by weight, methacryl-modified organopolysiloxane 1 part by weight, ethyl caprylate 1 part by weight
The parts by weight were sufficiently stirred and mixed with a kneader. The mixture was inserted into a mold and cured to obtain a synthetic wood molded product.

Example 4 100 parts by weight of an unsaturated polyester resin consisting of a mixture of an isophthalic unsaturated polyester and styrene, 3 parts by weight of a curing catalyst (50% benzoyl peroxide), and a curing accelerator (dimethylaniline) 0.
03 parts by weight, wood powder 200 parts by weight, methacryl-modified organopolysiloxane 1 part by weight, permethrin 1 part by weight, silver zeolite 2 parts by weight and TBZ 2 parts by weight were sufficiently stirred and mixed with a kneader. The mixture was inserted into a mold and cured to obtain a synthetic wood molded body.

FIG. 1 is a schematic view showing a cross section of synthetic wood in one embodiment of the present invention. 1 is a filler represented by wood flour, 2 is an additive represented by methacryl-modified organopolysiloxane, and 3 is a substance that evaporates an odor represented by permethrin. 4 is an inorganic antibacterial agent represented by silver zeolite, and 5 is an organic antibacterial agent represented by TBZ. The filler 1, additive 2, inorganic antibacterial agent 4, and organic antibacterial agent 5 are dispersed or dissolved in a resin component 6 represented by an unsaturated polyester resin.

Comparative Example 100 parts by weight of an unsaturated polyester resin composed of a mixture of an isophthalic acid-based unsaturated polyester and styrene, 3 parts by weight of a curing catalyst (50% benzoyl peroxide), and 0 parts of a curing accelerator (dimethylaniline) .
03 parts by weight and 200 parts by weight of wood flour were sufficiently stirred and mixed with a kneader. The mixture was inserted into a mold and cured to obtain a synthetic wood molded product.

The water repellency of each of the synthetic wood moldings obtained in each of the examples and comparative examples was measured with a contact angle measuring device (model CA-Z) manufactured by Kyowa Interface Chemical Co., Ltd. The contact angles of water in the examples and comparative examples were measured, and the measured values are shown in Table 1.
Further, stain resistance was confirmed according to JIS K3370. The stain resistance was compared visually, and the degree of contamination in Comparative Example 1 was evaluated as Δ, poorer than that was evaluated as x, and good as o, as relative evaluation. (Table 1)
Shown in

[0032]

[Table 1]

Next, the repellency of the synthetic wood moldings obtained in Examples 1, 2, 4 and Comparative Example against cockroaches was evaluated. A 200 mm × 200 mm flat plate sample was cut out from the molded body, food and water were placed on the sample, and each was allowed to stand in a room with 30 adult German cockroaches.
Eight hours later, the remaining ratio of the food to the original weight was examined. The results are shown in (Table 2).

[0034]

[Table 2]

Next, the synthetic wood molded products obtained in Examples 2, 3 and Comparative Example were evaluated by an aroma emission sensitivity test. The test was performed by 5 adults and 5 men and women. The results are shown in (Table 3).

[0036]

[Table 3]

Next, the synthetic wood molded articles obtained in Example 4 and Comparative Example were tested for antibacterial performance and mold resistance. A sample of 50 mm × 50 mm was cut out from the molded body, and 1 cc of a bacterial solution (Staphylococcus aureus and Escherichia coli) was dropped into each of the samples and cultured at 37 ° C. for 24 hours. Thereafter, the bacteria were washed out with a sterilized phosphate buffer. The viable cell count in the washed-out liquid was measured by a pour plate method using a cell count medium. The results are shown in (Table 4).

[0038]

[Table 4]

Each of the samples (50 mm × 50 mm) of Example 4 and Comparative Example on an agar medium was sprayed with Aspergillus niger solution and cultured at 25 ° C. for 7 days. The results are shown in (Table 5).

[0040]

[Table 5]

As is clear from Table 1, Example 1,
The synthetic wood molded articles 2, 3, and 4 showed remarkable improvements in water repellency and significantly improved stain resistance as compared with Comparative Examples. From these results, it was clarified that the water repellency and stain resistance of the synthetic wood molded article were significantly improved by the effect of the organic silicon compound or the organic fluorine compound additive.

As is clear from Table 2, Example 1,
The synthetic wood molded products of Nos. 2 and 4 have remarkably good cockroach repellent performance as compared with Comparative Examples.

As is clear from Table 3, Example 2,
It can be seen that the synthetic wood molded product of No. 3 emits fragrance clearly compared with the comparative example.

As is clear from Table 4, the synthetic wood molded product of Example 4 was able to obtain a remarkable antibacterial effect on Staphylococcus aureus and Escherichia coli as compared with Comparative Example.

As is clear from Table 5, the synthetic wood molded article of Example 4 was able to obtain better antifungal performance than the comparative example.

[0046]

As described above, according to the synthetic wood of the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the surface of the synthetic wood is improved in water repellency, and the surface free energy of the resin component is reduced by containing an additive whose surface free energy is smaller than the surface free energy of the resin component. It becomes active and it becomes difficult for dirt components to adhere. Furthermore, bacteria and molds are also less likely to adhere to dirt components serving as baits thereof, so that their growth is suppressed. In addition, since the synthetic wood contains a substance that evaporates the odor, it is possible to obtain a synthetic wood that emits a fragrance favorable to the user. In addition, since the substance that evaporates the odor is a volatile substance that masks offensive odor, comfortable synthetic wood that does not cause discomfort to the user can be obtained. In addition, since the substance that evaporates the odor is a volatile pest repellent, synthetic wood having cockroach and other unpleasant pest repellent properties can be obtained.

According to the second aspect of the present invention, both the dirt component, bacteria and fungus are positively exerted by the synergy effect of the dirt prevention effect by the addition of a substance having a smaller surface free energy and the addition effect of the antibacterial agent. Sanitary synthetic wood that does not proliferate becomes possible.

According to the invention of claim 6, synthetic wood is used as the filler from at least one selected from the group consisting of crushed cellulosic materials such as wood flour, organic fibers, inorganic fibers, chip-like substances and calcium silicate. With this configuration, it is possible to obtain synthetic wood that is excellent in texture, lightweight, and has high strength and high utility.

According to the seventh aspect of the present invention, the synthetic wood is composed of at least one substance selected from the group consisting of a natural essential oil having a pest repellent property and a pyrethroid-based substance, wherein the substance evaporating the odor is provided. Synthetic wood can be obtained which effectively has pest repellency such as cockroaches.

According to the eighth aspect of the present invention, since the substance that evaporates the odor is synthetic wood made of a fragrance, it is possible to obtain comfortable synthetic wood that generates a fragrance favorable to the user by the action of the fragrance. Can be.

According to the ninth aspect of the present invention, since the resin component is a synthetic wood made of at least one of a thermoplastic resin and a thermosetting resin, the texture, mechanical strength and thermal strength suitable for the intended use are obtained. Practical synthetic wood having such properties can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a cross section of synthetic wood according to one embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 filler 2 additive 3 substance that evaporates odor 4 inorganic antibacterial agent 5 organic antibacterial agent 6 resin component

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08L 83/04 C08L 101/00 101/00 C08K 5/54 (72) Inventor Mitsuyo Yamatomi Kadoma, Osaka 1006 Oaza Kadoma Matsushita Electric Industrial Co., Ltd.F-term (reference)

Claims (9)

[Claims] 1. Synthetic wood comprising a resin component, a filler, an additive of a substance having a surface free energy smaller than the surface free energy of the resin component, and a substance that evaporates odor. 2. Synthetic wood comprising a resin component, a filler, an additive of a substance having a surface free energy smaller than the surface free energy of the resin component, a substance that evaporates odor, and an antibacterial agent. 3. The synthetic wood according to claim 1, wherein the additive is at least one selected from the group of organic silicon compounds. 4. The synthetic wood according to claim 1, wherein the additive is at least one selected from the group of organic fluorine compounds. 5. The synthetic wood according to claim 2, wherein the antibacterial agent is at least one of inorganic antibacterial agents and at least one of organic antibacterial agents. 6. The synthetic wood according to claim 1, wherein the filler is at least one selected from the group consisting of crushed cellulosic materials such as wood flour, organic fibers, inorganic fibers, chip-like substances, and calcium silicate. 7. The synthetic wood according to claim 1, wherein the substance that evaporates the odor is at least one selected from the group consisting of a natural essential oil having a pest repellent property and a pyrethroid-based substance. 8. The synthetic wood according to claim 1, wherein the substance that evaporates the odor is a fragrance. 9. The synthetic wood according to claim 1, wherein the resin component is at least one of a thermoplastic resin and a thermosetting resin.