JP2020055950A - Thermoplastic resin composition, mollusk repellent using the same, and resin molded article for repelling mollusks - Google Patents

Abstract

To provide: a thermoplastic resin composition containing a repellent component for mollusks, which has excellent water resistance and good compatibility with a soil surface and the like and which has preferable molding processing ability; a mollusk repellent using the same; and a resin molded article for repelling mollusks.SOLUTION: A thermoplastic resin composition of the invention comprises an ethylene-ethyl acrylate copolymer resin and alkyl para-hydroxybenzoate. The thermoplastic resin composition of the invention exhibits an excellent repellent effect for mollusks such as snail, slug, and the like, and can prevent or decrease damages by the mollusks in open field cultivation or greenhouse cultivation of plants for eating and appreciation.SELECTED DRAWING: None

Description

  The present invention relates to a thermoplastic composition resin composition and a mollusk repellent material using the same and a resin molded body for repelling mollusks, and more particularly, to a mollusk excellent while maintaining moldability. The present invention relates to a thermoplastic resin composition capable of exhibiting a repellent effect, a mollusk repellent material using the same, and a resin molded product for repelling mollusks.

  Many edible or ornamental plants such as vegetables, edible mushrooms, fruit trees, and flowering trees are cultivated in alley cultivation, house cultivation, and the like. In these cultivations, large amounts of mollusks such as snails and slugs may adhere to sites such as shoots, fruits, buds, and flowers. It is feared that the mass outbreak of such mollusks will cause problems such as feeding damage of plants to be cultivated and infectious diseases caused by parasites, and the damage by mollusks is serious. Particularly, in the case of cultivation in a warm and humid environment, such damage may be serious.

  BACKGROUND ART In order to prevent cultivated plants from being damaged by mollusks, synthetic agents containing paraformaldehyde and methaldehyde as active ingredients have been conventionally known. However, the drug is intended for controlling pests and killing insects, and although it has a strong effect, it may damage the plant itself when attached to a cultivated plant. In particular, when the cultivated plant is edible, it is necessary to consider the effect of the drug attached to the plant surface on the human body. At the time of spraying, consideration must be given to humans, livestock, and pets.

  To improve the disadvantages of such synthetic agents, mollusk repellents obtained by granulating oil residue from seeds of Camellia plant have been proposed (Patent Document 1). However, it is assumed that the medicinal effect of such an oil scum is reduced due to scattering by the wind or sinking or burial in the soil, and the dispensing of the medicine is likely to be uneven. In addition, it has been pointed out that even after administration, the medicinal effect is significantly reduced over time or due to rainfall or watering.

  A tape for attaching a saponin to a synthetic resin tape or sheet having a surface coated with an adhesive or for repelling slugs has been proposed (Patent Document 2). Saponin is a substance that can be extracted from a Camellia plant, and can function as a repellent for molluscs such as slugs in that it has a foaming property, a hemolytic action, and a property as a slow surfactant. However, it has been pointed out that the efficacy of this repellent tape is significantly reduced over time or due to rainfall or water spray.

  Furthermore, a coating liquid containing an extract obtained from oiled cake of seeds of a Camellia plant in an aqueous resin such as a water-soluble acrylic resin is applied to a sheet material, and dried and / or heat-treated. A repellent sheet for mollusks in which strength and water resistance are improved by dropping or curing an aqueous resin through crosslinking has been disclosed (Patent Document 3). However, the repellent sheet of Patent Literature 3 requires a complicated manufacturing process, and the cured resin has not only high rigidity and poor handling properties, but also poor adaptability to uneven ground, so that the medicinal effect can always be sufficiently exerted. Not something. In addition, since the water-based resin evaporates moisture due to heating during the curing process, fine pores are generated on the surface of the resin sheet. For this reason, it is pointed out that although the initial medicinal effect is exerted, the effect after rainfall or watering is greatly reduced.

  Further, a sheet is disclosed in which saponin is blended with a polybutylene succinate-based or polylactic acid-based biodegradable plastic, melt-kneaded and molded (Patent Document 4). However, the biodegradable plastic in the sheet is still highly rigid to be used in a cultivation site after being formed into a sheet or film, but in that the water resistance of saponin is insufficient. The above problems have not been sufficiently solved.

JP-A-8-175925 JP-A-2002-171892 JP 2013-155116 A JP-A-2017-137261

  The present invention has been made to solve the above problems, and the object thereof is to contain a repellent component that is excellent in water resistance and is familiar to soil surfaces and the like for mollusks, and has a favorable property. An object of the present invention is to provide a thermoplastic resin composition having moldability, a mollusk repellent material using the same, and a resin molded body for repelling mollusks.

  The present invention is a thermoplastic resin composition containing an ethylene-ethyl acrylate copolymer resin and an alkyl paraoxybenzoate.

  In one embodiment, the content of the alkyl paraxybenzoate is 5 parts by weight to 60 parts by weight based on 100 parts by weight of the ethylene-ethyl acrylate copolymer resin.

  In one embodiment, the alkyl parahydroxybenzoate includes a linear or branched alkyl group having 1 to 8 carbon atoms.

  In one embodiment, the alkyl paraoxybenzoate is at least one compound selected from the group consisting of butyl paraoxybenzoate and hexyl paraoxybenzoate.

  In one embodiment, the ethylene-ethyl acrylate copolymer resin comprises from 10% to 45% by weight of the ethyl acrylate monomer component based on the weight of the ethylene-ethyl acrylate copolymer resin.

  The present invention is also a mollusk repellent comprising the thermoplastic resin composition as an active ingredient.

  The present invention is also a resin molded product for repelling mollusks, comprising the above thermoplastic resin composition.

  In one embodiment, the resin molding has a form of a film or a sheet.

  In one embodiment, it has a form of a laminate including a repellent layer composed of the resin composition and an adhesive layer.

  ADVANTAGE OF THE INVENTION According to this invention, the medicinal effect of a repellent component is prevented or reduced remarkably by rainfall or water sprinkling, and a mollusc can be stably repelled to a cultivated plant with time. Furthermore, since the thermoplastic resin composition of the present invention can be formed into a desired form while appropriately maintaining such a repellent effect, the thermoplastic resin composition has an arbitrary form according to the type or cultivation method of the plant to be cultivated. A mollusk repellent can be provided.

  Hereinafter, the present invention will be described in detail.

(Thermoplastic resin composition)
The thermoplastic resin composition of the present invention contains an ethylene-ethyl acrylate copolymer resin and an alkyl paraoxybenzoate.

  The ethylene-ethyl acrylate (EEA) copolymer resin contains, as a main component, a copolymer of an ethylene component and an ethyl acrylate monomer component. It is known that ethylene-ethyl acrylate (EEA) copolymer resin is generally more flexible than low density polyethylene (LDPE), and the melting point decreases as the content of the ethyl acrylate monomer component increases. . The ethylene-ethyl acrylate copolymer resin constituting the thermoplastic resin of the present invention has a melting point of, for example, 65C to 110C.

  The content of the ethyl acrylate monomer component of the ethylene-ethyl acrylate copolymer contained in the ethylene-ethyl acrylate copolymer resin is not particularly limited, but is preferably 10% by weight based on the weight of the copolymer resin. -45 wt%, more preferably 15-40 wt%, even more preferably 15-35 wt% ethyl acrylate monomer component. When the content of the ethyl acrylate monomer component of the ethylene-ethyl acrylate copolymer resin is less than 10% by weight, the molding processability of the obtained resin compound is reduced, and the pelletized state of the alkyl paraoxybenzoate is formed on the pellet surface. Powder blowing may occur.

  Examples of such an ethylene-ethyl acrylate copolymer resin include, for example, EUC for extrusion coating (NUC-6220, NUC-6170, EERN-023, DPDJ-9165, NUC-6510, NUC-6520, NUC manufactured by NUC Corporation). -6570, NUC-6070, NUC-6940, etc.) and Lexpearl A1100, A3100, A1150, A4200, A6200, A4250, etc. manufactured by Nippon Polyethylene Co., Ltd. are commercially available.

  Alkyl parahydroxybenzoate is an esterification reaction product of paraoxybenzoic acid and an alkyl alcohol.

  The alkyl paraoxybenzoate preferably contains an alkyl group having 1 to 8 carbon atoms, more preferably 4 to 7 carbon atoms, in its molecular structure. The alkyl group may be linear or branched. Examples of the alkyl group constituting the alkyl paraoxybenzoate include a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group, an n-octyl group, Examples include an isopropyl group, an isobutyl group, an s-butyl group, a t-butyl group, an isopentyl group, an s-pentyl group, a 3-pentyl group, and a t-pentyl group.

  Specific examples of the alkyl paraoxybenzoate in the present invention include butyl paraoxybenzoate (for example, n-butyl paraoxybenzoate) and hexyl paraoxybenzoate (for example, n-hexyl paraoxybenzoate), and a combination thereof. No. Butyl paraoxybenzoate has excellent antibacterial properties and is also used as a preservative in the production of sake and soy sauce. It is known that hexyl paraoxybenzoate itself has an excellent repellent effect on mollusks such as slugs and snails. Both such butyl paraoxybenzoate and hexyl paraoxybenzoate are commercially available.

  In the present invention, the presence or absence of affinity between the ethylene-ethyl acrylate copolymer resin and the alkyl parahydroxybenzoate may be noted. For example, when other components are added as a compound to the molding resin, it is desirable to select and use one having good affinity for the molding resin. For example, if the plasticizer for the resin does not have a good affinity, the plasticizer may ooze out on the surface of the molded product, and the surface may become sticky. On the other hand, if the affinity between the drug component and the resin component is too good, the drug component is confined inside the resin molded article and cannot exert its full effect, and most of the drug component is wasted. This is because there are times.

  However, such concerns are not particularly required in the thermoplastic resin composition of the present invention.

  In the present invention, the ethylene-ethyl acrylate copolymer resin, which is a constituent component, and the alkyl parahydroxybenzoate have an appropriate affinity for each other. As a result, even when the alkyl paraoxybenzoate is kneaded with the ethylene-ethyl acrylate copolymer resin, the pharmacological effect thereof can be efficiently exhibited without hindering its efficacy.

  The contents of the ethylene-ethyl acrylate copolymer resin and the alkyl paraoxybenzoate in the thermoplastic resin composition of the present invention are not necessarily limited, but, for example, paraoxybenzoic acid is relative to 100 parts by weight of the ethylene-ethyl acrylate copolymer resin. Preferably, the alkyl is 5 to 60 parts by weight, more preferably 15 to 35 parts by weight. If the content of the alkyl paraoxybenzoate is less than 5 parts by weight based on 100 parts by weight of the ethylene-ethyl acrylate copolymer resin, the repellent effect on mollusks may be insufficient. When the content of the alkyl paraoxybenzoate exceeds 60 parts by weight with respect to 100 parts by weight of the ethylene-ethyl acrylate copolymer resin, the content of the ethylene-ethyl acrylate copolymer resin is relatively reduced, thereby obtaining When the obtained resin composition is molded into a desired molded body, the surface of the molded body may become sticky.

  Thermoplastic resin composition of the present invention, the affinity of the ethylene-ethyl acrylate copolymer resin and both based on alkyl paraoxybenzoate, and other resins and other additives in a range that does not inhibit the medicinal properties, moldability. May be contained.

  Examples of other resins that can constitute the thermoplastic resin composition of the present invention include, but are not necessarily limited to, polyolefin resins and modified products thereof, and ethylene ionomers. Examples of the polyolefin-based resin include a homopolymer of ethylene, a copolymer of ethylene and an α-olefin other than ethylene containing more than 50% by weight of an ethylene component, a homopolymer of propylene, and 50% by weight of a propylene component. % Of propylene and an α-olefin other than propylene, a homopolymer of butene, and a homopolymer or copolymer of a conjugated diene such as butadiene or isoprene. In the thermoplastic resin composition of the present invention, the other resin may contain, for example, up to 30% by weight based on the weight of the thermoplastic resin composition.

  Examples of other additives that can constitute the thermoplastic resin composition of the present invention include, but are not necessarily limited to, agents having other medicinal effects (eg, acaricide, insect repellent); antioxidants (eg, phenol) UV absorbers (for example, benzophenone UV absorbers and / or benzotriazole UV absorbers); Antistatic agents (for example, anions), antioxidants, sulfur antioxidants, and / or phosphorus antioxidants. Surfactants, cationic surfactants, nonionic surfactants, and / or amphoteric surfactants); clarifying agents (for example, metal salts of carboxylic acids, sorbitols, and / or metal salts of phosphate esters); Hydrocarbon-based lubricant, fatty acid-based lubricant, higher alcohol-based lubricant, fatty acid amide-based lubricant, metal soap-based lubricant, and / or ester-based lubricant); (E.g., organic flame retardant and / or inorganic flame retardants); and a plasticizer (e.g., epoxidized vegetable oils, phthalic acid esters, and / or polyester plasticizer); and combinations thereof; and the like. The content of the other additives that can be contained in the present invention is not particularly limited, and an arbitrary amount can be selected by those skilled in the art.

  The thermoplastic resin composition of the present invention can be molded into various forms as a mollusk repellent material having excellent flexibility by using an ethylene-ethyl acrylate copolymer resin as a component, and can be used.

(Resin molding to avoid mollusks)
The resin molded article of the present invention contains the above-mentioned thermoplastic resin composition as an active ingredient, and can be used to repel mollusks (namely, slugs and snails). That is, the resin molded article of the present invention is obtained by molding the above-mentioned thermoplastic resin composition into a sheet or a film so as to have a predetermined film thickness using, for example, means known to those skilled in the art. The thickness of the sheet or film is not particularly limited, and can be appropriately selected by those skilled in the art.

  The resin molded article of the present invention in the form of a sheet or film is used as an agricultural or horticultural sheet or film at a cultivation site such as an alley cultivation or a house cultivation for an edible plant or an ornamental plant in the agricultural or horticultural field. In addition, the alkyl paraoxybenzoate contained in the thermoplastic resin composition can prevent or reduce the occurrence of a large amount of molluscs in the edible plant and the ornamental plant.

  The resin molded article of the present invention also has a laminate in which the thermoplastic resin composition is thinly spread to form a repellent layer, and an adhesive layer is laminated on one surface thereof using a well-known adhesive (for example, an adhesive). May be provided. The thickness of each of the repellent layer and the adhesive layer in the laminate is not particularly limited, and an appropriate thickness can be selected by those skilled in the art.

  When the resin molded article of the present invention has the form of a laminate by a combination of such a repellent layer and an adhesive layer, the resin molded article is known in the art for repelling mollusks. It can be used by attaching it to agricultural or horticultural sheets.

  In addition, although the case where the laminated body which is one embodiment of the resin molded body of the present invention is composed of two layers of the repellent layer and the adhesive layer has been described above, the laminated body of the present invention has such a structure. It is not limited only to a simple configuration. For example, a release layer such as release paper may be provided on the side of the adhesive layer opposite to the side facing the repellent layer.

  INDUSTRIAL APPLICABILITY The resin molded article of the present invention is useful for repelling mollusks to edible plants and / or ornamental plants cultivated through alley cultivation or house cultivation. Such edible plants are not necessarily limited, for example, Chinese cabbage, cabbage, lettuce, turnip, radish, taasai, komatsuna, mizuna, radish, watercress, arugula, bok choy, broccoli, strawberry, cucumber, eggplant and the like Can be The ornamental plants are not necessarily limited, but include, for example, roses, hydrangeas, morning glories, mosses, succulents, cacti, and the like.

  Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.

(Example 1)
100 parts by weight of an ethylene-ethyl acrylate copolymer resin (EEA resin DPDJ-9169 manufactured by NUC; ethyl acrylate monomer component content 35% by weight) was added to a melt extruder (Miracle KCK manufactured by Asada Tekko Co., Ltd.) 25 parts by weight of n-hexyl benzoate (manufactured by Ueno Pharmaceutical Co., Ltd.) was charged, melt-kneaded and pelletized. Next, a film (1-A) having a thickness of 25 μm was prepared from the obtained pellets using a T-die extruder.

(Example 2)
A pellet was prepared in the same manner as in Example 1 except that the charged amount of n-hexyl paraoxybenzoate was changed to 17.6 parts by weight, and a film (1-B) having a thickness of 25 μm was obtained from the obtained pellet. Was prepared.

(Example 3)
A pellet was prepared in the same manner as in Example 1 except that the charged amount of n-hexyl paraoxybenzoate was changed to 11.1 parts by weight, and a film (1-C) having a thickness of 25 μm was obtained from the obtained pellet. Was prepared.

(Example 4)
100 parts by weight of an ethylene-ethyl acrylate copolymer resin (EEA resin NUC-6940, manufactured by NUC; ethyl acrylate monomer component content: 20% by weight) was added to a melt extruder (Miracle KCK, manufactured by Asada Tekko Co., Ltd.) 42.9 parts by weight of n-hexyl benzoate (manufactured by Ueno Pharmaceutical Co., Ltd.) was charged, melt-kneaded and pelletized. Next, a film (2-A) having a thickness of 25 μm was prepared from the obtained pellets using a T-die extruder.

(Example 5)
A pellet was produced in the same manner as in Example 4 except that the charged amount of n-hexyl paraoxybenzoate was changed to 33.3 parts by weight, and a film (2-B) having a thickness of 25 μm was obtained from the obtained pellet. Was prepared.

(Example 6)
A pellet was prepared in the same manner as in Example 4 except that the charged amount of n-hexyl paraoxybenzoate was changed to 25 parts by weight, and a film (2-C) having a thickness of 25 μm was prepared from the obtained pellet. did.

(Example 7)
A pellet was prepared in the same manner as in Example 4 except that the charged amount of n-hexyl paraoxybenzoate was changed to 17.6 parts by weight, and a film (2-D) having a thickness of 25 μm was obtained from the obtained pellet. Was prepared.

(Example 8)
A pellet was produced in the same manner as in Example 4 except that the charged amount of n-hexyl paraoxybenzoate was changed to 11.1 parts by weight, and a film (2-E) having a thickness of 25 μm was obtained from the obtained pellet. Was prepared.

(Example 9)
100 parts by weight of an ethylene-ethyl acrylate copolymer resin (EEA resin NUC-6940 manufactured by NUC; ethyl acrylate monomer component content 35% by weight) was added to a melt extruder (Miracle KCK manufactured by Asada Tekko Co., Ltd.) and paraoxyl. 17.6 parts by weight of n-butyl benzoate (manufactured by Ueno Pharmaceutical Co., Ltd.) was charged, melt-kneaded and pelletized. Next, a film (3-A) having a thickness of 25 μm was prepared from the obtained pellets using a T-die extruder.

(Comparative Example 1)
A pellet was prepared in the same manner as in Example 1 except that the amount of n-hexyl paraoxybenzoate was changed to 0 parts by weight, and a 25 μm-thick film (CTL) was prepared from the obtained pellet as a control. did.

(Test method for evaluation of repellent effect on mollusks)
Using each of the films prepared in Examples 1 to 8, an evaluation test of the repellent effect on mollusks was performed as follows.

  First, films (1-A) to (1-C), (2-A) to (2-E), and (3-A) produced in Examples 1 to 9 and Comparative Example 1, and a film (CTL) Were cut into 30 cm × 30 cm, respectively, to obtain samples.

  Next, a drainage groove was provided at the bottom of a wooden box of 40 cm × 40 cm × (height) 30 cm, and a 30 cm × 30 cm sample film (one of the above prepared films) was placed at the center. In the center of the box was placed about 10 g of rapeseed oil scum as a mollusc attractant.

  Thereafter, ten slugs (collected in a house field) were placed around the sample in the box, and left as it was at a temperature of 25 ° C. and a relative humidity of 65% for 6 hours. Three hours after the start of the test, water was sprayed on the sample with a gardening jar. Then, the number of slugs that had moved to the attractant 12 hours after the start of the test was counted, and the repellent rate (%) was calculated according to the following formula.

  The above operation and calculation of the repellent rate were performed using the films (1-A) to (1-C), (2-A) to (2-E), and (3-A) produced in Examples 1 to 9 and Comparative Example 1. ) And the sample obtained from the film (CTL) were performed twice except for the film (CTL), and the average value thereof was taken as the repellent rate in this evaluation. Table 1 shows the obtained results.

  As shown in Table 1, all of the films (1-A) to (1-C), (2-A) to (2-E), and (3-A) obtained in Examples 1 to 9 were: It can be seen that the slug could be effectively repelled by the attractant as compared with the film (CTL) of Comparative Example 1 which is a control. For example, as is evident from the results of Examples 4 to 8, the repellent effect was enhanced as the charged amount of n-hexyl paraoxybenzoate was increased. However, for example, as is clear from the comparison between Examples 1 and 6, even if the charged amounts of n-hexyl paraoxybenzoate were the same, the ethylene acrylate component contained in the ethylene-ethyl acrylate copolymer resin was It can be seen that there was a difference in the repellent rate depending on the content.

(Comparative Example 2)
A melt extruder (Miracle KCK manufactured by Asada Iron Works Co., Ltd.) was charged with 100 parts by weight of a low-density polyethylene resin (NUC-8809 manufactured by NUC Corporation) and 5 parts by weight of n-hexyl paraoxybenzoate (manufactured by Ueno Pharmaceutical Co., Ltd.) Pelletization was attempted by melt-kneading. However, prior to pelletization, n-hexyl paraoxybenzoate was thermally decomposed, smoked, foamed, and the pellets themselves could not be obtained.

(Comparative Example 3)
Pelletization was attempted in the same manner as in Comparative Example 2, except that the charged amount of n-hexyl paraoxybenzoate was changed to 25 parts by weight. However, prior to pelletization, n-hexyl paraoxybenzoate was thermally decomposed, smoked, foamed, and the pellets themselves could not be obtained.

(Comparative Example 4)
Pelletization was attempted in the same manner as in Comparative Example 2, except that 100 parts by weight of a polypropylene resin (F109V manufactured by Prime Polymer Co., Ltd.) was used instead of the low-density polyethylene resin. However, prior to pelletization, n-hexyl paraoxybenzoate was thermally decomposed, smoked, foamed, and the pellets themselves could not be obtained.

(Comparative Example 5)
Pelletization was attempted in the same manner as in Comparative Example 2 except that 100 parts by weight of an ethylene-vinyl acetate copolymer resin (Evaflex P1207 manufactured by DuPont Mitsui Chemicals, Inc.) was used instead of the low-density polyethylene resin. However, prior to pelletization, n-hexyl paraoxybenzoate was thermally decomposed, smoked, foamed, and the pellets themselves could not be obtained.

(Comparative Example 6)
100 parts by weight of an ethylene-vinyl acetate copolymer resin (Evaflex P1207 manufactured by Mitsui DuPont Chemical Co., Ltd.) was used instead of the low-density polyethylene resin, and the charge amount of n-hexyl paraoxybenzoate was changed to 25 parts by weight. Except for the above, pelletization was attempted in the same manner as in Comparative Example 2. However, prior to pelletization, n-hexyl paraoxybenzoate was thermally decomposed, smoked, foamed, and the pellets themselves could not be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the point which can improve the cultivation efficiency of an edible plant and an ornamental plant is useful in technical fields, such as an agricultural field and a horticultural field, for example.

The present invention relates to a thermoplastic resin composition and a mollusk repellent material using the same and a resin molded body for repelling mollusks, and more particularly, to an excellent repellent to mollusks while maintaining moldability. The present invention relates to a thermoplastic resin composition capable of exerting an effect, a mollusk repellent material using the same, and a resin molded product for repelling mollusks.

The present invention has been made to solve the above problems, and the object thereof is to contain a repellent component that is excellent in water resistance and is familiar to soil surfaces and the like for mollusks, and has a favorable property. An object of the present invention is to provide a thermoplastic resin composition having moldability, a mollusk repellent material using the same, and a resin molded body for repelling mollusks.

In one embodiment, the content of the alkyl parahydroxybenzoate is 5 parts by weight to 60 parts by weight based on 100 parts by weight of the ethylene-ethyl acrylate copolymer resin.

(Resin molding to avoid mollusks)
The resin molded article of the present invention contains the above thermoplastic resin composition as an active ingredient, and can be used to repel mollusks ( eg , slugs and snails). That is, the resin molded article of the present invention is obtained by molding the above-mentioned thermoplastic resin composition into a sheet or a film so as to have a predetermined film thickness using, for example, means known to those skilled in the art. The thickness of the sheet or film is not particularly limited, and can be appropriately selected by those skilled in the art.

(Comparative Example 5)
Pelletization was attempted in the same manner as in Comparative Example 2, except that 100 parts by weight of an ethylene-vinyl acetate copolymer resin (Evaflex P1207 manufactured by Du Pont-Mitsui Polychemicals Co., Ltd. ) was used instead of the low-density polyethylene resin. However, prior to pelletization, n-hexyl paraoxybenzoate was thermally decomposed, smoked, foamed, and the pellets themselves could not be obtained.

(Comparative Example 6)
Instead of the low-density polyethylene resin, 100 parts by weight of an ethylene-vinyl acetate copolymer resin (Evaflex P1207 manufactured by Mitsui DuPont Polychemicals Co., Ltd. ) was used, and the charge amount of n-hexyl paraoxybenzoate was changed to 25 parts by weight. Except for this, pelletization was attempted in the same manner as in Comparative Example 2. However, prior to pelletization, n-hexyl paraoxybenzoate was thermally decomposed, smoked, foamed, and the pellets themselves could not be obtained.

Claims (9)

  A thermoplastic resin composition containing an ethylene-ethyl acrylate copolymer resin and an alkyl paraoxybenzoate.   The thermoplastic resin composition according to claim 1, wherein the content of the alkyl paraxybenzoate is 5 to 60 parts by weight based on 100 parts by weight of the ethylene-ethyl acrylate copolymer resin. .   The thermoplastic resin composition according to claim 1, wherein the alkyl paraoxybenzoate contains a linear or branched alkyl group having 1 to 8 carbon atoms. 4.   The thermoplastic resin composition according to claim 3, wherein the alkyl paraoxybenzoate is at least one compound selected from the group consisting of butyl paraoxybenzoate and hexyl paraoxybenzoate.   5. The ethylene-ethyl acrylate copolymer resin according to claim 1, wherein the ethylene-ethyl acrylate copolymer resin contains 15 to 35 wt% of an ethyl acrylate monomer component based on the weight of the ethylene-ethyl acrylate copolymer resin. 5. The thermoplastic resin composition according to item 1.   A mollusk repellent comprising the thermoplastic resin composition according to any one of claims 1 to 5 as an active ingredient.   A resin molded product for repelling mollusks, comprising the thermoplastic resin composition according to claim 1.   The resin molded product for repelling a mollusk according to claim 7, which has a form of a film or a sheet.   The resin molded product for repelling a mollusk according to claim 7, which has a form of a laminate including a repellent layer composed of the resin composition and an adhesive layer.