WO2020070836A1 - Resin composition, wrapping film, and wrapping film housing body - Google Patents

Abstract

One aspect of the present invention is a resin composition containing a thermoplastic resin and a compound having an epoxy group and a partial structure represented by formula (1). In formula (1), R¹ represents an alkylene group.

Description

Resin composition, wrap film and wrap film container

The present invention relates to a resin composition, a wrap film, and a wrap film container.

ラ ッ プ Conventionally, wrap films have been widely used for business use in hotels, restaurants, and the like, or at home for storing food, cooking, and the like. To the wrap film, additives such as a plasticizer, an antifogging agent, and a stabilizer are generally added for the purpose of imparting a function such as flexibility to the film or facilitating the production of the film. For example, as a plasticizer used in a wrap film, a polyester compound (polyester plasticizer) is known (for example, see Patent Document 1).

JP 2013-119624 A

According to the study of the present inventors, when a conventional polyester-based plasticizer is used, when a thermoplastic resin and a resin composition containing the plasticizer are formed into a film to obtain a wrap film, the resin is used. It has been found that the thermal stability of the composition is impaired, and a desired wrap film may not be obtained.

Therefore, an object of the present invention is to provide a resin composition having excellent thermal stability, a wrap film formed from the resin composition, and a wrap film container provided with the wrap film.

The present inventors have found that the thermal stability of a resin composition can be improved by adding a specific compound as a plasticizer to a thermoplastic resin.

One aspect of the present invention is a resin composition containing a thermoplastic resin and a compound having a partial structure and an epoxy group represented by the following formula (1).

In the formula (1), R ¹ represents an alkylene group.

The partial structure may be a partial structure represented by the following formula (2).

In the formula (2), R ¹ represents an alkylene group.

分子 The molecular weight of the compound may be 500 or more and 5000 or less.

The compound may be a compound represented by the following formula (3).

In the formula (3), R ¹ to R ⁵ each independently represent an alkylene group; R ⁶ to R ⁹ each independently represent an alkyl group; m1 and m2 each independently represent an integer of 1 or more; n2 each independently represents an integer of 0 or more.

M1 and m2 in the equation (3) may be 1. N1 and n2 in the equation (3) may be 0. R ² and R ⁵ in the formula (3) may be an alkylene group having 5 to 9 carbon atoms or a heptylene group. R ⁶ and R ⁹ in the formula (3) may be an alkyl group having 6 to 10 carbon atoms, and may be an octyl group. R ⁷ and R ⁸ in the formula (3) may be an alkyl group having 1 to 4 carbon atoms, and may be a methyl group. R ¹ in the formula (3) may be an alkylene group having 2 to 6 carbon atoms, or may be a butylene group.

The compound may be a compound represented by the following formula (5).

The resin composition may further contain acetylated monoglyceride. The resin composition may further contain a polycarboxylic acid ester. The polycarboxylic acid ester may include a hydroxy polycarboxylic acid ester. The hydroxy polycarboxylic acid ester may include an acetylated citrate alkyl ester. The polycarboxylic acid ester may include a cyclohexanedicarboxylic acid dialkyl ester. The resin composition may further contain an epoxidized vegetable oil. The epoxidized vegetable oil may include epoxidized soybean oil and may include epoxidized linseed oil.

Another aspect of the present invention is a resin composition containing a thermoplastic resin and a compound having a partial structure represented by the following formula (2).

In the formula (2), R ¹ represents an alkylene group.

の 他 Another aspect of the present invention is a wrap film including a layer made of the above resin composition. The wrap film may be used for packaging food products.

側面 Another aspect of the present invention is a wrap film container including a core, the wrap film wound around the core, and a box housing the core and the film.

According to the present invention, it is possible to provide a resin composition having excellent thermal stability, a wrap film formed from the resin composition, and a wrap film container provided with the wrap film.

It is a perspective view showing the wrap film container concerning one embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

樹脂 The resin composition according to one embodiment contains a thermoplastic resin. Thermoplastic resins include polyester resins such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate; polyamide resins such as 6-nylon, 6,6-nylon and 12-nylon; butadiene-styrene copolymer, acrylonitrile-styrene Polystyrene resins such as copolymer, polystyrene, styrene-butadiene-styrene copolymer, styrene-isoprene-styrene copolymer, styrene-acrylic acid copolymer; polyethylene, polypropylene, saponified ethylene-vinyl acetate copolymer And the like. Polyolefin resins such as polyvinyl chloride resins such as polyvinyl chloride; and polyvinylidene chloride resins such as polyvinylidene chloride. From the viewpoint of excellent handleability, the thermoplastic resin is preferably a polyvinyl chloride resin, a polyvinylidene chloride resin or a polyolefin resin, more preferably a polyvinyl chloride resin, a polyvinylidene chloride resin or polyethylene. It is a system resin.

(4) As the polyvinyl chloride resin, a polyvinyl chloride resin having an average degree of polymerization of 700 to 1300 is preferable from the viewpoint of excellent moldability, heat resistance and fluidity when forming a wrap film. The average degree of polymerization in the present specification means an average degree of polymerization measured according to JIS K6720-2.

The polyvinyl chloride resin may be a vinyl chloride homopolymer (polyvinyl chloride resin) from the viewpoint of excellent mechanical properties, and for the purpose of imparting other properties, other resins copolymerizable with vinyl chloride. It may be a copolymer with a monomer. The copolymer may be a graft copolymer, a block copolymer or a random copolymer. Examples of other monomers include olefins such as ethylene, propylene and butene; vinyl esters of saturated acids such as vinyl acetate and vinyl laurate; alkyl esters of unsaturated acids such as methyl acrylate and methyl methacrylate; lauryl Alkyl vinyl ethers such as vinyl ether; maleic acid, acrylonitrile, styrene, methyl styrene, and vinylidene fluoride; When the polyvinyl chloride resin is a copolymer, the content of vinyl chloride units in the copolymer may be 10% by mass or more based on the total amount of monomer units, and is preferably 30% by mass from the viewpoint of excellent mechanical properties. % By mass or more, more preferably 50% by mass or more. The upper limit of the content of the vinyl chloride unit in the copolymer is not particularly limited, and may be, for example, 99% by mass or less based on the total amount of the monomer units.

The polyvinyl chloride resin may be, for example, a polymer blend with a three-dimensional polymer of acrylonitrile-butadiene-styrene, a post-treated product with an alcohol or the like, or a post-treated product with a chlorine-containing compound. In these cases, the content of the vinyl chloride unit in the polyvinyl chloride resin may be 10% by mass or more based on the total amount of the resin.

The polyvinylidene chloride-based resin may be a vinylidene chloride homopolymer (polyvinylidene chloride resin), for example, a copolymer containing vinylidene chloride and another monomer copolymerizable with vinylidene chloride as a monomer unit. May be. Other monomers include vinyl chloride, acrylic acid esters of acrylic acid and alcohols having 1 to 8 carbon atoms, methacrylic acid esters of methacrylic acid and alcohols having 1 to 8 carbon atoms, vinyl esters of aliphatic carboxylic acids, and unsaturated monomers. It may be an aliphatic carboxylic acid, olefin, vinyl ether or the like. Note that the copolymer of vinylidene chloride and vinyl chloride belongs to a polyvinylidene chloride resin.

The content of the vinylidene chloride unit in the polyvinylidene chloride-based resin is, for example, 60% by mass or more, 70% by mass or more, or 80% by mass, based on the total amount of the monomer units, from the viewpoint of moldability and heat resistance during wrap film molding. That is all. The upper limit of the content of the vinylidene chloride unit in the polyvinylidene chloride-based resin is not particularly limited, and may be, for example, 99% by mass or less based on the total amount of the monomer units. The content of vinylidene chloride units can be measured by a nuclear magnetic resonance (NMR) device.

重量 The weight average molecular weight of the polyvinylidene chloride resin may be, for example, 40,000 to 180,000, 60,000 to 160,000, or 80,000 to 140,000. The weight average molecular weight of the polyvinylidene chloride resin can be measured by a GPC method using polystyrene having a known molecular weight as a standard substance.

The conditions of the GPC method used for measuring the weight average molecular weight of the polyvinylidene chloride resin are as follows. As a measuring apparatus, a gel chromatograph Alliance @ GPC2000 manufactured by Waters Co., Ltd. is used. A sample in which a polyvinylidene chloride-based resin is dissolved in tetrahydrofuran so as to have a concentration of 0.5% by mass is used.

Column: Tosoh Corporation TSKgel GMHHR-H (S) HT 30 cm × 2, TSKgel GMH6-HTL 30 cm × 2
Mobile phase: tetrahydrofuran Detector: differential refractometer Flow rate: 1.0 mL / min Column temperature: 20 ° C
Injection volume: 500 μL
Examples of the polyolefin-based resin include a polyethylene-based resin, and the polyethylene-based resin includes a low-density polyethylene, a linear low-density polyethylene, a linear ultra-low-density polyethylene, a medium-density polyethylene, a high-density polyethylene, and a monomer unit including ethylene. May be used. Specifically, polyethylene-based resins include ethylene and propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, 1-octene and the like having 3 to 10 carbon atoms. vinyl esters such as α-olefins, vinyl acetate and vinyl propionate; unsaturated carboxylic esters such as methyl acrylate, ethyl acrylate, methyl methacrylate and ethyl methacrylate; unsaturated compounds such as conjugated dienes and non-conjugated dienes; It may be a copolymer with one or more selected from the above. The content of the ethylene unit in the polyethylene resin may be 50% by mass or more based on the total amount of the monomer units.

The content of the thermoplastic resin may be 70% by mass or more, or 75% by mass or more, and 85% by mass or less or 80% by mass or less, based on the total amount of the resin composition, from the viewpoint of excellent productivity during wrap film molding. It may be.

The resin composition contains, in addition to the thermoplastic resin, a compound having a partial structure represented by the following formula (1) (hereinafter, also referred to as “compound A”). When the resin composition contains this compound, the stability of the resin composition is improved.

In the formula (1), R ¹ represents an alkylene group. The alkylene group represented by R ¹ may be linear or branched. The alkylene group represented by R ¹ may have 2 or more, 3 or more, or 4 or more, and may have 8 or less, 7 or less, 6 or less, 5 or less, or 4 or less. , 2-7, 2-6, 2-5, 2-4, 3-8, 3-7, 3-6, 3-5, 3-4, 4-8, 4-7, 4-6, or It may be 4-5. The alkylene group may be a C4 alkylene group (butylene group) or a C4 linear alkylene group (n-butylene group).

The above partial structure may be a partial structure represented by the following formula (2).

In formula (2), ^{R 1} has the same meaning as ^{R 1} in the formula (1).

In one embodiment, the compound A further has an epoxy group in addition to the above partial structure. The epoxy group is a group represented by the following formula (X).

Compound A is preferably a compound represented by the following formula (3).

In the formula (3), ^{R 1} has the same meaning as ^{R 1} in the formula ^{(1), R 2 ~ R} 5 each independently represents an alkylene ^group, R 6 ~ ^{R 9} each independently represents an alkyl group, m1 and m2 each independently represent an integer of 1 or more, and n1 and n2 each independently represent an integer of 0 or more. The alkylene groups represented by R ² to R ⁵ may be each independently linear or branched. The alkyl groups represented by R ⁶ to R ⁹ may be each independently linear or branched.

The carbon number of the alkylene group represented by R ² , R ³ , R ⁴ or R ⁵ may be 2 or more, 3 or more, 4 or more, 5 or more, 6 or more, or 7 or more, and 12 or less, 11 or less , 10 or less, 9 or less, 8 or less, or 7 or less, 2 to 12, 2 to 11, 2 to 10, 2 to 9, 2 to 8, 2 to 7, 3 to 12, 3 to 11, 3 to 10, 3 to 9, 3 to 8, 3 to 7, 4 to 12, 4 to 11, 4 to 10, 4 to 9, 4 to 8, 4 to 7, 5 to 12, 5 to 11, 5 to 10, 5-9, 5-8, 5-7, 6-12, 6-11, 6-10, 6-9, 6-8, 6-7, 7-12, 7-11, 7-10, 7-9, or 7-8. The alkylene group may be an alkylene group having 7 carbon atoms (heptylene group) or a linear alkylene group having 7 carbon atoms (n-heptylene group).

m1 and m2 each independently may be an integer of 2 or more, 3 or more, or 4 or more, and may be an integer of 4 or less, 3 or less, or 2 or less; It may be an integer of ２2, 2 ～ 4, or 2 ～ 3. m1 and m2 may be 1.

n1 and n2 each independently may be an integer of 1 or more, 2 or more, or 3 or more, and may be an integer of 3 or less, 2 or less, or 1 or less, and 0 to 3, 0 to 2, 0 It may be an integer of 1 to 1, 1 to 3, or 1 to 2. n1 and n2 may be 0.

When m1, n1, m2, and n2 are each an integer of 2 or more, a plurality of R ² may be the same or different, a plurality of R ³ may be the same or different, and a plurality of R ^{4 May} be the same or different from each other, and a plurality of R ^{5 's} may be the same or different from each other.

The alkyl group represented by R ⁶ or R ⁹ may have 4 or more, 5 or more, 6 or more, 7 or more, or 8 or more, and 12 or less, 11 or less, 10 or less, 9 or less, or 8 or more. 4-12, 4-11, 4-10, 4-9, 4-8, 5-12, 5-11, 5-10, 5-9, 5-8, 6-12, 6-11, 6-10, 6-9, 6-8, 6-7, 7-12, 7-11, 7-10, 7-9, or 7-8. The alkylene group may be an alkyl group having 8 carbon atoms (octyl group) or a linear alkyl group having 8 carbon atoms (n-octyl group).

The alkyl group represented by R ⁷ or R ⁸ may have 1 to 8, 1 to 7, 1 to 6, 1 to 5, 1 to 4, 1 to 3, or 1 to 2 carbon atoms. The alkyl group may be an alkyl group having 1 carbon atom (methyl group).

In one embodiment, the compound A may be a compound represented by the following formula (4) (a compound in which m1 and m2 are 1 and n1 and n2 are 0 in formula (3)).

Wherein ^(2), R 1, ^{R 2} and ^R 5 ~ ^{R 9} have the same meanings as ^R 1, ^{R 2} and ^R 5 ~ ^{R 9} in each formula (3).

Compound A, in one embodiment, a compound represented by the following formula (5) in (Equation (3), m1 and m2 are 1, n1 and n2 are 0, ^{R 1} is n- butylene, ^{R 2} and R ⁵ is an n-heptylene group, R ⁶ and R ⁹ are n-octyl groups, and R ⁷ and R ⁸ are methyl groups).

The molecular weight of the compound A may be 500 or more, 600 or more, 700 or more, 800 or more, or 900 or more from the viewpoint of more excellent thermal stability, and may be 5000 or less, 3000 or less, 2500 or less, 2000 or less, or 1500 or less. It may be.

The content of the compound A is preferably 2% by mass, from the viewpoint of further improving the thermal stability of the resin composition and appropriately suppressing the amount of the additive eluted from the wrap film, based on the total amount of the resin composition. It is 5% by mass or more, 8% by mass or more, 9% by mass or more, or 10% by mass or more, and preferably 20% by mass or less, 15% by mass or less, from the viewpoint of excellent film forming properties of the wrap film. % By mass, 12% by mass or less, or 11% by mass or less.

Compound A can be synthesized, for example, by the following method.
First, glycerol-3-phosphate is acylated with an unsaturated fatty acid, and the obtained product is dephosphorylated to synthesize diacylglycerol. Thereafter, diacetylglycerol is epoxidized, and the obtained product is dehydrated by reacting with dicarboxylic acid.

The resin composition may further contain acetylated monoglyceride. The acetylated monoglyceride may be, for example, a compound in which two of the hydroxyl groups of glycerin are acetylated and the other one is esterified with a fatty acid. The fatty acid may be, for example, a fatty acid having 3 to 8 carbon atoms.

The content of the acetylated monoglyceride may be 0.5% by mass or more, 1.5% by mass or more, 3% by mass or more, 4% by mass or more, or 5% by mass or more based on the total amount of the resin composition. It may be up to 9% by weight, up to 9% by weight, or up to 8% by weight.

The resin composition may further contain a polycarboxylic acid ester. The polycarboxylic acid ester is an ester of a polycarboxylic acid and an alcohol. The polycarboxylic acid may be, for example, a divalent to tetravalent carboxylic acid. The alcohol may be, for example, an aliphatic alcohol having 1 to 10 carbon atoms.

(4) The polycarboxylic acid may be, for example, an aliphatic polycarboxylic acid. That is, the polycarboxylic acid ester may be an aliphatic polycarboxylic acid ester which is an ester of an aliphatic polycarboxylic acid and an alcohol. The aliphatic polycarboxylic acid may be, for example, adipic acid. That is, the aliphatic polycarboxylic acid ester may be, for example, a diester of adipic acid and an alcohol, a diester of adipic acid and an aliphatic alcohol having 1 to 10 carbon atoms, or dioctyl adipate. May be.

The polycarboxylic acid may be, for example, a hydroxy polycarboxylic acid that is a polycarboxylic acid having a hydroxyl group. That is, the polycarboxylic acid ester may be a hydroxypolycarboxylic acid ester which is an ester of a hydroxypolycarboxylic acid and an alcohol. The hydroxy polycarboxylic acid may be, for example, citric acid. That is, the hydroxy polycarboxylic acid ester may be a triester of citric acid and an alcohol. The hydroxyl group of the hydroxy polycarboxylic acid ester may be acetylated. The hydroxy polycarboxylic acid ester may be an acetylated hydroxy polycarboxylic acid ester, may be an acetylated citrate triester, or may be an acetylated citrate trialkyl ester. The acetylated trialkyl citrate may be, for example, acetylated tributyl citrate.

(4) The polycarboxylic acid may be, for example, cyclohexane polycarboxylic acid which is a polycarboxylic acid having a cyclohexane ring. That is, the polycarboxylic acid ester may be a cyclohexane polycarboxylic acid ester which is an ester of a cyclohexane polycarboxylic acid and an alcohol. The cyclohexane polycarboxylic acid may be, for example, cyclohexanedicarboxylic acid. That is, the cyclohexane polycarboxylic acid ester may be a diester of cyclohexane dicarboxylic acid and an alcohol, and may be a dialkyl cyclohexane dicarboxylic acid ester. The dialkyl cyclohexanedicarboxylate may be, for example, diisononyl 1,2-cyclohexanedicarboxylate.

The content of the polycarboxylic acid ester may be 1% by mass or more, 2% by mass or more, 3% by mass or more, 4% by mass or more, or 5% by mass or more based on the total amount of the resin composition, and may be 15% by mass or more. Hereinafter, it may be 13% by mass or less, 10% by mass or less, 9% by mass or less, or 8% by mass or less.

The resin composition may further contain an epoxidized vegetable oil. The epoxidized vegetable oil may be epoxidized soybean oil, epoxidized linseed oil, and the like. The content of the epoxidized vegetable oil may be 3% by mass or more, 4% by mass or more, or 5% by mass or more based on the total amount of the resin composition, and may be 10% by mass or less, 9% by mass or less, or 8% by mass or less. It may be.

The resin composition may further contain other additives in addition to the thermoplastic resin, the compound A and each of the above-mentioned additives. Other additives include anti-fogging agents, heat stabilizers, light stabilizers, coloring agents, plasticizers, lubricants, fillers, plate-out inhibitors, antioxidants, release agents, viscosity reducing agents, surfactants , A fluorescent agent, a surface treatment agent, a cross-linking agent, a processing aid, an adhesive, an antistatic agent, an ultraviolet absorber, an anti-blocking agent, and the like. When the resin composition contains other additives, the content (total content) of the other additives may be, for example, 1% by mass or more and 30% by mass or less.

The resin composition is suitably used for a wrap film. That is, one embodiment of the present invention is a wrap film including a layer made of the above resin composition. This wrap film is particularly suitably used for packaging food because it can reduce the amount of additive eluted into food.

The wrap film may be composed of only one layer containing the thermoplastic resin and the compound A, or may be composed of a plurality of layers. When the wrap film includes a plurality of layers, the wrap film may include, for example, a first surface layer, an intermediate layer, and a second surface layer in this order. In this case, for example, the first and second surface layers contain a thermoplastic resin, a compound A, and an optional additive, and the intermediate layer includes a thermoplastic resin and an optional additive. An agent may be contained. The wrap film may further include an adhesive layer containing an acid-modified polyolefin resin or the like, for example, in order to improve the adhesion between the respective layers, and in order to improve the heat resistance of the wrap film, a polyamide resin is used. A heat-resistant layer may be further provided.

The thickness of the wrap film is preferably 5 μm or more, more preferably 6 μm or more, from the viewpoint of efficiently shielding the food from the outside air, and from the viewpoint of excellent handleability, preferably 25 μm or less, more preferably It may be 12 μm or less.

全 The total light transmittance of the wrap film is preferably 75% or more, more preferably 80% or more, for example, 90% or less, from the viewpoint of excellent visibility. The total light transmittance can be calculated by measuring the amount of incident light and the total amount of transmitted light according to JIS K7361-1, and calculating the total light transmittance = (total amount of transmitted light) / (incident amount of light) × 100.

The wrap film is prepared, for example, by mixing a thermoplastic resin, a compound A, and the above-mentioned additives, if necessary, with a mixer such as a V-type blender, a ribbon blender, a Henschel mixer, or a super mixer, and further mixing if necessary. The composition is obtained by kneading with a kneading machine such as a roll, a Banbury mixer, a kneader or the like, and then, for example, extrusion molding. Specifically, the composition is supplied to a hopper of an extruder, and an intended wrap film is obtained by an inflation method, a T-die method, or the like.

When the wrap film is composed of a plurality of layers, the wrap film is obtained by putting the constituent materials of each layer into separate extruders, melt-extruding the layers, co-extruding the layers by an inflation method, a T-die method, etc., and laminating the layers. Can be At this time, it is preferable to form a wrap film by taking out the melt extruded from the T-die as it is while rapidly cooling it with a casting roll or the like.

Depending on the purpose of reducing the heat shrinkage, the natural shrinkage, etc .; suppressing the occurrence of width shrinkage; longitudinal stretching between heating rolls, various types of heat setting for the wrap film thus obtained. Heat treatment such as aging and the like, and for the purpose of improving antifogging property, antistatic property, adhesiveness, etc., corona treatment; aging treatment; surface treatment such as printing and coating; Good.

The wrap film, for example, is formed on a long length and wound up, and then further re-wound (rolled) at a desired length such as 20 m, 50 m, etc., and packed into a box to form a product. You. That is, the wrap film in the present embodiment may be in the form of a wrap film wound around a core or may be in the form of a wrap film housed in a box.

FIG. 1 is a perspective view showing a wrap film container according to one embodiment. As shown in FIG. 1, a wrap film container 1 according to one embodiment includes a wrap film 2, a core 3 around which the wrap film is wound, and a box 4 accommodating the wrap film 2 and the core 3. It has. The box 4 may be provided with a blade portion 5 for cutting the wrap film 2. The materials of the core 3 and the box 4 are not particularly limited. From the viewpoint of easily recognizing the color of the wrap film from the outside, at least a part of the box 4 is preferably transparent or has a hole so as not to impair the function of the box, so that the inside can be visually recognized from the outside. It has become.

In general, a “film” is a thin flat product whose thickness is extremely small compared to its length and width and whose maximum thickness is arbitrarily limited, and which can be supplied in the form of a roll (necessary In this case, the Japanese Industrial Standard JIS K6900 can be referred to). In general, the term “sheet” refers to a product that is thin in definition according to JIS, and that is generally small and flat in terms of length and width. However, the boundary between the sheet and the film is not clear, and it is not necessary to distinguish between the two in the present embodiment. Therefore, in the present specification, the term “film” includes the term “sheet” and the term “sheet”. The term "film" also includes "film". Further, “film” is a concept including a wrap film among the above definitions.

Hereinafter, the present invention will be described more specifically based on examples, but the present invention is not limited to the examples.

樹脂 Resin compositions having the compositions shown in Tables 1 and 2 were prepared using the following thermoplastic resins and additives. Specifically, after each component was put into a super mixer, the temperature of the material was raised from room temperature to 130 ° C. while stirring, and mixed to obtain a resin composition. In addition, the balance of the content of each component other than the polyvinyl chloride resin (thermoplastic resin) subtracted from 100% by mass is the content of the polyvinyl chloride resin (thermoplastic resin). The content of each component means mass% in terms of solid content.

Thermoplastic resin: polyvinyl chloride resin (manufactured by Taiyo PVC Co., Ltd., "TH-1000", average degree of polymerization: 1000)
Additive A: Compound represented by the following formula (5) (Di (2-acetate, 3-epoxyoleate) glyceryl adipate)

Additive a: polyester plasticizer ("D623", manufactured by J-PLUS Co., Ltd., number average molecular weight: 1800, adipic acid polyester)
Additive B1: Acetylated monoglyceride ("PL-012", manufactured by Riken Vitamin Co., Ltd.)
Additive B2: Dioctyl adipate (Sansoizer DOA, manufactured by Shin Nippon Rika Co., Ltd.)
Additive B3: Epoxidized soybean oil (“Chemisizer SE-100” manufactured by Sanwa Gosei Chemical Co., Ltd.)
Additive B4: Glycerin fatty acid ester ("XO-100" manufactured by Riken Vitamin Co., Ltd.)
Additive B5: Ca / Zn-based stabilizer (“SC-308E” manufactured by ADEKA Corporation)

(Evaluation of thermal stability)
60 g of each of the obtained resin compositions is put into a roller mixer R60 type attached to Labo Plast Mill (“4C150-01” manufactured by Toyo Seiki Seisaku-Sho, Ltd.), and kneaded at 210 ° C. and 60 rpm to obtain a resin composition. The dynamic thermal stability was evaluated. The dynamic thermal stability time was a time required to reach a torque value of 150% from the value of the steady torque. It can be said that the longer the dynamic thermal stability time, the better the thermal stability. The results are shown in Tables 1 and 2.

(Evaluation of film forming properties)
Each resin composition was extruded at a resin temperature of 200 ° C. using a T-die extruder to form a wrap film, and the appearance of the obtained wrap film was observed to evaluate film forming properties. The evaluation criteria are as follows. In addition, if evaluation is A or B, it can be said that it is excellent in film-forming property. The results are shown in Tables 1 and 2.
A: A wrap film having a substantially uniform thickness was obtained, and no scorching occurred after 24 hours of extrusion.
B: Slight unevenness was observed in the thickness of the wrap film, and scorching occurred during extrusion for 24 hours.
C: The thickness unevenness of the wrap film was severe, and burnt was generated by extrusion for 8 hours.

Subsequently, each resin composition was taken out at the time when it was cooled to 70 ° C., and was subjected to a resin composition by a 40 mm diameter single screw extruder (L / D = 20) equipped with a T-die (width: 350 mm, gap: 0.4 mm). The product was extruded at a temperature of 200 ° C. to produce a wrap film having a thickness of 8 μm.

(Evaluation of elution amount of additive (heptane elution amount))
A sample of a fixed area was cut from the wrap film, immersed in ² mL of a heptane solution per 1 cm ^{2 of} the surface area at a temperature of 25 ° C. for 1 hour, the solution was evaporated to dryness, and the weight was measured to convert the film into a heptane solution. The amount of migration was determined. It can be said that the smaller the migration amount is, the more the elution amount of the additive can be suppressed. The results are shown in Tables 1 and 2.

# 1: wrap film container, 2: wrap film, 3: core, 4: box, 5: blade.

Claims (28)

1. A thermoplastic resin,
   A resin composition comprising: a compound having a partial structure represented by the following formula (1) and an epoxy group.
   

   

   [In the formula (1), R ¹ represents an alkylene group. ]
2. 樹脂 The resin composition according to claim 1, wherein the compound has a molecular weight of 500 or more.
3. The resin composition according to claim 1, wherein the partial structure is a partial structure represented by the following formula (2).
   

   

   [In the formula (2), R ¹ represents an alkylene group. ]
4. 樹脂 The resin composition according to any one of claims 1 to 3, wherein the compound has a molecular weight of 5,000 or less.
5. The resin composition according to any one of claims 1 to 4, wherein the compound is a compound represented by the following formula (3).
   

   

   [In the formula (3), R ¹ to R ⁵ each independently represent an alkylene group, R ⁶ to R ⁹ each independently represent an alkyl group, m1 and m2 each independently represent an integer of 1 or more, and n1 And n2 each independently represent an integer of 0 or more. ]
6. 樹脂 The resin composition according to claim 5, wherein m1 and m2 in the formula (3) are 1.
7. 樹脂 The resin composition according to claim 5, wherein n1 and n2 in the formula (3) are 0.
8. The resin composition according to any one of claims 5 to 7, wherein R ² and R ⁵ in the formula (3) are an alkylene group having 5 to 9 carbon atoms.
9. The resin composition according to any one of claims 5 to 8, wherein R ² and R ⁵ in the formula (3) are a heptylene group.
10. The resin composition according to any one of claims 5 to 9, wherein R ⁶ and R ⁹ in the formula (3) are an alkyl group having 6 to 10 carbon atoms.
11. The resin composition according to any one of claims 5 to 10, wherein R ⁶ and R ⁹ in the formula (3) are an octyl group.
12. The resin composition according to any one of claims 5 to 11, wherein R ⁷ and R ⁸ in the formula (3) are an alkyl group having 1 to 4 carbon atoms.
13. 13. The resin composition according to claim 5, wherein R ⁷ and R ⁸ in the formula (3) are a methyl group.
14. 14. The resin composition according to claim 5, wherein R ¹ in the formula (3) is an alkylene group having 2 to 6 carbon atoms.
15. 15. The resin composition according to claim 5, wherein R ¹ in the formula (3) is a butylene group.
16. 16. The resin composition according to claim 1, wherein the compound is a compound represented by the following formula (5).
    

    
17. The resin composition according to any one of claims 1 to 16, further comprising acetylated monoglyceride.
18. (18) The resin composition according to any one of (1) to (17), further comprising a polycarboxylic acid ester.
19. 19. The resin composition according to claim 18, wherein the polycarboxylic acid ester includes a hydroxy polycarboxylic acid ester.
20. 20. The resin composition according to claim 19, wherein the hydroxy polycarboxylic acid ester includes an acetylated trialkyl citrate.
21. The resin composition according to any one of claims 18 to 20, wherein the polycarboxylic acid ester includes a cyclohexanedicarboxylic acid dialkyl ester.
22. The resin composition according to any one of claims 1 to 21, further comprising an epoxidized vegetable oil.
23. 23. The resin composition according to claim 22, wherein the epoxidized vegetable oil comprises epoxidized soybean oil.
24. 24. The resin composition according to claim 22, wherein the epoxidized vegetable oil comprises epoxidized linseed oil.
25. A resin composition containing a thermoplastic resin and a compound having a partial structure represented by the following formula (2).
    

    

    [In the formula (2), R ¹ represents an alkylene group. ]
26. A wrap film comprising a layer comprising the resin composition according to any one of claims 1 to 25.
27. 27. The wrap film according to claim 26, which is used for packaging food.
28. Core and
    Wrapped around the core, the wrap film according to claim 26 or 27,
    A wrap film container comprising: a core for storing the core and the film.

Images