Resin composition, compatibilizing agent, molding, film and film production method

Abstract

To provide a resin composition and a compatibilizing agent for obtaining a molding having excellent appearance and strength.SOLUTION: A resin composition contains a polar group-containing polyolefin resin (C), and a polyester-based resin (D), wherein a glass transition temperature of a homopolymer of a polyester unit contained in the polyester-based resin (D) is lower than 0°C.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a resin composition, a compatibilizer, a molded article, a film, and a method for producing the film.

Background Art

[0002] In recent years, from the viewpoints of environmental protection and the like, material recycling of resin products has been promoted. In many cases, the recycling raw materials of resin products contain a plurality of types of resins, such as a combination of a polyolefin resin and a polyester resin and / or a polyamide resin.

[0003] Further, these resins have different advantages in physical properties. In order to realize a resin material having each advantage, polymer alloys in which a plurality of types of resins are mixed have also been studied.

[0004] A polymer alloy in which a plurality of types of resins are mixed may have problems in physical properties due to the low compatibility between the resins. For example, if a plurality of types of resins are not sufficiently compatible, the molded article of the polymer alloy is inferior in mechanical properties and it is difficult to obtain good appearance due to color unevenness or the like. As a method for solving such problems, the use of a compatibilizer has been proposed. For example, Patent Document 1 and Patent Document 2 propose a compatibilizer for a polyolefin resin and a polyester resin using maleic anhydride-modified polyethylene or the like.

[0005] Patent Document 3 discloses a compatibilizer for a polyolefin resin and a polyamide resin, which is a combination of maleic anhydride-modified polypropylene and an ethylene-glycidyl methacrylate copolymer. Further, Patent Document 4 discloses a compatibilizer for a polyolefin resin and a polyester resin, which is a combination of an ethylene-glycidyl methacrylate copolymer and an acid-modified or amine-modified styrene-based elastomer.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0007] Polymer alloys of polyester resins and / or polyamide resins and polyolefin resins are expected to be applied to various uses, and thus are required to have characteristics suitable for each use. However, the compatibilizers described in each of the above patent documents have room for improvement from the viewpoint of obtaining a molded article having excellent appearance properties with the above polymer alloy.

[0008] One aspect of the present invention aims to provide a resin composition for obtaining a molded article having excellent appearance properties and strength, as well as a compatibilizer and the like.

Means for Solving the Problems

[0009] In order to solve the above problems, a resin composition according to one aspect of the present invention contains a polar group-containing polyolefin resin (C) and a polyester resin (D), and the glass transition temperature of the homopolymer of the polyester unit contained in the polyester resin (D) is less than 0°C.

Effects of the Invention

[0010] According to one aspect of the present invention, it is possible to provide a resin composition for obtaining a molded article having excellent appearance properties, as well as a compatibilizer and the like.

Modes for Carrying Out the Invention

[0011] Hereinafter, one aspect of the present invention will be described in detail, but the present invention is not necessarily limited to the following aspects without departing from the object. In this specification, "~" shall include the lower limit and the upper limit. Also, for each preferred range, the upper limit and the lower limit can be arbitrarily combined and used.

[0012] One aspect of the present invention includes a resin composition containing a polar group-containing polyolefin resin (C) and a polyester resin (D), which is effective for improving the compatibility between a polyolefin resin (A) and a thermoplastic resin (B) containing a polyester resin (a) and / or a polyamide resin (b). Further, resin compositions containing these resins and the resin composition (compatibilizer), as well as molded articles and films containing the resin composition (compatibilizer), are also included in one aspect of the present invention.

[0013] The inventors have found that by using a resin composition, which is a mixture of a polar group-containing polyolefin resin (C) and a polyester resin (D), as a compatibilizer, a molded article having excellent appearance and high tensile strength can be provided. Although this mechanism is not clear, it is considered that the polar group-containing polyolefin resin (C) is well compatible with the polyolefin resin (A) and also moderately compatible with the thermoplastic resin (B). Further, since the polyester resin (D) is well compatible with the thermoplastic resin (B), it is considered that the compatibility between the polyolefin resin (A) and the thermoplastic resin (B) is improved by the combination of the polar group-containing polyolefin resin (C) and the polyester resin (D).

[0014] According to the resin composition containing the compatibilizer according to one aspect of the present invention as described above, the dispersion during resin mixing is promoted, so that physical properties having both the toughness of the polyolefin resin (A) and the fluidity and rigidity of the thermoplastic resin (B) are exhibited, and a molded article having excellent appearance can be obtained.

[0015] Thus, according to one aspect of the present invention, when recycling waste of a molded article containing a polyolefin resin (A) and a thermoplastic resin (B), reduction of physical properties can be minimized, and a new resin composition and its molded article can be manufactured with high efficiency. Such an effect also contributes to the achievement of, for example, Sustainable Development Goals (SDGs) Goal 12 "Responsible consumption and production" proposed by the United Nations.

[0016] [1. Resin composition containing a polar group-containing polyolefin resin (C) and a polyester resin (D)] The resin composition according to one aspect of the present invention contains a polar group-containing polyolefin resin (C) and a polyester resin (D), and the glass transition temperature of the homopolymer of the polyester unit contained in the polyester resin is less than 0°C. The polar group-containing polyolefin resin (C) and the polyester resin (D) in the resin composition may each exist alone as a mixture, or a part of both may be polymerized. A polymer of the polar group-containing polyolefin resin (C) and the polyester resin (D) is also included in the resin composition according to one aspect of the present invention.

[0017] [1-1. Polar group-containing polyolefin resin (C)] The resin composition according to one aspect of the present invention contains a polar group-containing polyolefin resin (C). The polar group possessed by the polar group-containing polyolefin resin (C) has an appropriate affinity with the thermoplastic resin (B) containing the polyester resin (a) and / or the polyamide resin (d). Therefore, a resin composition containing such a polar group-containing polyolefin resin (C) is effective in improving the compatibility between the polyolefin resin (A) and the thermoplastic resin (B).

[0018] The polar group contained in the polar group-containing polyolefin resin (C) may be at least one selected from the group consisting of an epoxy group, a hydroxyl group, a carboxyl group, an acid anhydride group, an oxazoline group, and an amino group. The polar group contained in the polar group-containing polyolefin resin (C) may be one kind or two or more kinds. From the viewpoint of obtaining good compatibility, the polar group contained in the polar group-containing polyolefin resin (C) is preferably an epoxy group, a hydroxyl group, or an acid anhydride group.

[0019] The polar group-containing polyolefin resin (C) may be a copolymer of a carboxylic acid and / or a carboxylic acid derivative and a polyolefin or an olefin-based elastomer. In this case, at least one of the polar groups contained in the polar group-containing polyolefin resin (C) is a polar group contained in the carboxylic acid and / or the carboxylic acid derivative. From the viewpoints of improving mechanical properties and appearance, the structural unit derived from the carboxylic acid and / or the carboxylic acid derivative is preferably in the graft chain of the polar group-containing polyolefin resin (C).

[0020] Examples of the carboxylic acid include (meth)acrylic acid, maleic acid, methylmaleic acid, fumaric acid, methylfumaric acid, tetrahydrophthalic acid, itaconic acid, citraconic acid, crotonic acid, isocrotonic acid, glutaconic acid, and norbornene-5-ene-2,3-dicarboxylic acid. Note that “(meth)acrylic acid” indicates acrylic acid or methacrylic acid.

[0021] Examples of the carboxylic acid derivative include carboxylic acid esters, carboxylic acid anhydrides, and carboxylic acid imides.

[0022] Examples of the carboxylic acid ester include ester compounds of the above carboxylic acids, and examples thereof include (meth)acrylic acid esters such as methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and glycidyl (meth)acrylate.

[0023] Examples of the carboxylic acid anhydride include anhydrides of the above-mentioned carboxylic acids, such as dicarboxylic acid anhydrides like maleic anhydride, itaconic anhydride, succinic anhydride, citraconic anhydride, and 5-norbornene-2,3-dicarboxylic anhydride.

[0024] Examples of the carboxylic acid imide include imide compounds of the above-mentioned carboxylic acids, such as maleimide compounds like maleimide, N-ethylmaleimide, and N-phenylmaleimide.

[0025] Note that as the carboxylic acid and / or carboxylic acid derivative, these may be used alone or in combination of two or more. Among the above, from the viewpoint of reactivity with polyolefin or olefin-based elastomer, carboxylic acid ester or dicarboxylic acid anhydride is preferable, dicarboxylic acid anhydride is more preferable, and maleic anhydride is even more preferable.

[0026] The polyolefin contained in the polar group-containing polyolefin resin (C) is not particularly limited, and examples thereof include polyethylene and polypropylene. Among them, polyethylene is preferably used from the viewpoint of improving appearance. Further, the polyolefin may be at least any one of the polyolefins exemplified as the polyolefin resin (A) in the subsequent stage.

[0027] The olefin-based elastomer contained in the polar group-containing polyolefin resin (C) is not particularly limited, but is preferably an olefin-based thermoplastic elastomer, for example. Note that the polar group-containing polyolefin resin (C) may further contain a styrene-based thermoplastic elastomer together with the polyolefin and / or olefin-based elastomer.

[0028] Examples of olefinic thermoplastic elastomers include, for example, α-olefin-ethylene copolymers. The ethylene content in the α-olefin-ethylene copolymer is preferably 60 to 95 mol%, more preferably 70 to 90 mol%, and the α-olefin content is preferably 5 to 40 mol%, more preferably 10 to 30 mol%. The olefinic thermoplastic elastomer may be a random copolymer of an α-olefin and ethylene.

[0029] As the α-olefin, linear or branched α-olefins having 3 to 20 carbon atoms are preferred, and examples include propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-octene, and 1-decene. Two or more of them may be used in combination. Among these copolymers, propylene-ethylene copolymer, 1-butene-ethylene copolymer, or 1-octene-ethylene copolymer is preferred. A small amount of a diene component may be contained in this copolymer.

[0030] The olefinic thermoplastic elastomer desirably has a density of 0.85 to 0.90 g / cm 3 Such α-olefin-ethylene copolymers can be produced, for example, by copolymerizing ethylene and an α-olefin in a solution state in the presence of a Ziegler catalyst or a metallocene catalyst.

[0031] Examples of styrenic thermoplastic elastomers include, for example, styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), and styrene-ethylene-propylene-styrene block copolymer (SEPS).

[0032] The method for producing the polar group-containing polyolefin resin (C) is not particularly limited. For example, (1) a method in which a polyolefin or an olefin-based elastomer is polymerized and then a compound or monomer having a carboxylic acid and / or a carboxylic acid derivative is added; (2) a method in which a polyolefin or an olefin-based elastomer is polymerized and then subjected to an oxidation treatment to generate a carboxylic acid group in the polymer molecule; (3) a method in which a polyolefin or an olefin-based elastomer is copolymerized with a compound or monomer having a polar group, etc. can be mentioned.

[0033] As the polymerization method, a radical polymerization method such as solution polymerization, emulsion polymerization, suspension polymerization, bulk polymerization, etc., or a living polymerization method can be adopted. Furthermore, a method of polymerizing after once forming a macromonomer can also be adopted. The polar group-containing polyolefin resin (C) preferably has a carboxylic acid and / or a carboxylic acid derivative as a graft chain, and in this regard, the method (1) is preferable. Note that the polar group-containing polyolefin resin (C) may have a carboxylic acid and / or a carboxylic acid derivative in the main chain.

[0034] The total ratio of the carboxylic acid and / or the carboxylic acid derivative in 100% by weight of the polar group-containing polyolefin resin (C) is not particularly limited, but in order to improve the compatibility between the polyolefin resin (A) and the thermoplastic resin (B), it is preferably 0.01% by weight or more, and more preferably 0.05% by weight or more. On the other hand, in order to improve the appearance of the molded body, the total ratio is preferably 20% by weight or less, and more preferably 15% by weight or less.

[0035] The molecular weight of the polar group-containing polyolefin resin (C) can be obtained by dissolving the polar group-containing polyolefin resin (C) in an organic solvent and subjecting the resulting solution to thermal decomposition GC-MS (gas chromatography mass spectrometer, using a non-polar column). Thereby, the number of carbon atoms and the content of the α-olefin contained in the polar group-containing polyolefin resin (C) can be calculated. Examples of the organic solvent for dissolving the polar group-containing polyolefin resin (C) include, but are not limited to, THF (tetrahydrofuran).

[0036] The acid value of the polar group-containing polyolefin resin (C) is preferably 1 mg·KOH / g or more, more preferably 2 mg·KOH / g or more, still more preferably 3 mg·KOH / g or more, still more preferably 4 mg·KOH / g or more, and still more preferably 5 mg·KOH / g or more in order to improve the appearance of the molded article.

[0037] On the other hand, when the acid value of the polar group-containing polyolefin resin (C) is too high, the polar group-containing polyolefin resin (C) may react excessively with the polyester resin (a) and / or the polyamide resin (b). As a result, it may become difficult for the polar group-containing polyolefin resin (C) to obtain appropriate compatibility with the polyolefin resin (A) and the thermoplastic resin (B). Therefore, the acid value is preferably 100 mg·KOH / g or less, more preferably 80 mg·KOH / g or less, still more preferably 70 mg·KOH / g or less, still more preferably 55 mg·KOH / g or less, still more preferably 40 mg·KOH / g or less, still more preferably 30 mg·KOH / g or less, and still more preferably 20 mg·KOH / g or less.

[0038] The acid value of the polar group-containing polyolefin resin (C) can be measured by FT-IR measurement. The polar group-containing polyolefin resin (C) is hot-pressed at 5 MPa for 5 minutes at a temperature equal to or higher than the melting temperature to produce a molded article. FT-IR measurement is performed on this molded article, and the modification rate of the carboxylic acid and / or carboxylic acid derivative is quantified by the absorption at 1780 cm -1 The acid value is calculated by multiplying the modification rate by the coefficient 11.44.

[0039] The mass average molecular weight of the polar group-containing polyolefin resin (C) is not particularly limited, but is preferably 50,000 or more, more preferably 60,000 or more, still more preferably 80,000 or more, and even more preferably 100,000 or more in order to improve impact resistance. On the other hand, if the mass average molecular weight of the polar group-containing polyolefin resin (C) is too high, the dispersibility in the resin composition deteriorates. Therefore, the mass average molecular weight is preferably 1,000,000 or less, more preferably 750,000 or less, still more preferably 500,000 or less, even more preferably 250,000 or less, and even more preferably 200,000 or less.

[0040] The mass average molecular weight of the polar group-containing polyolefin resin (C) is a value in terms of standard polystyrene measured by gel permeation chromatography after dissolving the polar group-containing polyolefin resin (C) in an organic solvent such as THF.

[0041] The melt mass flow rate of the polar group-containing polyolefin resin (C) is not particularly limited, but is preferably 0.1 g / 10 min or more, more preferably 0.2 g / 10 min or more, still more preferably 0.3 g / 10 min or more, even more preferably 0.4 g / 10 min or more, still more preferably 0.5 g / 10 min or more, and even more preferably 1.0 g / 10 min or more in order to improve the dispersibility in the resin.

[0042] On the other hand, in order to reduce the decrease in processability, the melt mass flow rate is preferably 200 g / 10 min or less, more preferably 150 g / 10 min or less, still more preferably 100 g / 10 min or less, even more preferably 80 g / 10 min or less, still more preferably 70 g / 10 min or less, even more preferably 60 g / 10 min or less, and even more preferably 50 g / 10 min or less.

[0043] The melt mass flow rate of the polar group-containing polyolefin resin (C) can be calculated by a method conforming to JIS K7210. The temperature and load in the measurement of the melt mass flow rate shall be 190°C and 2.16 kgf (21.18 N).

[0044] <1-2. Polyester resin (D)> The polyester resin (D) may be a polycondensate of aromatic or aliphatic polycarboxylic acids and polyols. In the production of the polyester resin (D), one type of polycarboxylic acid and polyol may be selected each and produced under normal polycondensation conditions, or two or more types may be appropriately combined for production. In the present invention, the term "polycarboxylic acids" includes carboxylic acid derivatives such as carboxylates, carboxylic anhydrides, carboxylic acid halides, and carboxylic acid esters in addition to carboxylic acids. Among them, from the viewpoint of compatibility, the polyester resin (D) is preferably an aromatic polyester resin composed of a polycondensate of aromatic polycarboxylic acids and polyols.

[0045] Examples of the polycarboxylic acids constituting the polyester resin (D) include alkyldicarboxylic acids, aromatic dicarboxylic acids, and cycloaliphatic dicarboxylic acids.

[0046] Examples of alkyldicarboxylic acids include linear alkyldicarboxylic acids such as malonic acids, succinic acids, glutaric acids, adipic acids, pimelic acids, azelaic acids, sebacic acids, 1,9-nonanedicarboxylic acids, and decanedicarboxylic acids; dicarboxylic acids having an alkyl group in the side chain such as dimethylmalonic acids, trimethyladipic acids, 2,2-dimethylglutaric acids, 1,3-diethylglutaric acids, and dimer acids; unsaturated group-containing dicarboxylic acids such as fumaric acids, maleic acids, and itaconic acids; acyclic aliphatic dicarboxylic acids such as thiodipropionic acids and diglycolic acids, etc.

[0047] Examples of the aromatic dicarboxylic acids include aromatic dicarboxylic acids and sulfonic acid group-containing aromatic dicarboxylic acids.

[0048] Examples of the aromatic dicarboxylic acids include benzenedicarboxylic acids such as terephthalic acid, isophthalic acid, dimethyl terephthalate, dimethyl isophthalate, and orthophthalic acid; polycyclic aromatic dicarboxylic acids having a plurality of benzene rings such as 1,4-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, and 4,4'-biphenyldicarboxylic acid; heterocyclic dicarboxylic acids such as furandicarboxylic acids and thiophenedicarboxylic acids (such as pyrrole, pyrazole, imidazole, pyridine, pyridazine, pyrimidine, or pyrazine).

[0049] Examples of the sulfonic acid group-containing aromatic dicarboxylic acids include sodium dimethyl 4-sulfoisophthalate, sodium 5-sulfoisophthalate, sodium dimethyl 5-sulfoisophthalate, potassium dimethyl 4-sulfoisophthalate, potassium dimethyl 5-sulfoisophthalate, sodium 2-sulfoisophthalate, potassium 2-sulfoisophthalate, sodium dimethyl 2-sulfoisophthalate, potassium dimethyl 2-sulfoisophthalate, and sodium diethylene glycol 2-sulfoisophthalate.

[0050] Examples of the cyclic aliphatic dicarboxylic acids include 1,3-cyclopentanedicarboxylic acids, 1,2-cyclohexanedicarboxylic acids, 1,3-cyclopentanedicarboxylic acids, 1,4-cyclohexanedicarboxylic acids, 2,5-norbornanedicarboxylic acids, and adamantanedicarboxylic acids.

[0051] These polycarboxylic acids may be used alone or in combination of two or more.

[0052] As the polyvalent carboxylic acids, divalent carboxylic acids are preferable, and among them, it is preferable to contain an aromatic dicarboxylic acid in terms of further improving the appearance and physical properties of the molded article obtained from the resin composition and the thermoplastic resin composition containing two or more resins. Further, among the aromatic dicarboxylic acids, terephthalic acid, isophthalic acid, dimethyl terephthalate or dimethyl isophthalate is preferable, and dimethyl terephthalate or dimethyl isophthalate is most preferable.

[0053] In addition, the polyol constituting the polyester resin (D) is not particularly limited, and examples thereof include linear aliphatic diols, aliphatic diols, alicyclic diols, and aromatic diols.

[0054] Examples of the linear aliphatic diol include ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, and 1,18-octadecanediol.

[0055] The aliphatic diol may be an aliphatic diol having a hydrocarbon group in the side chain, and examples thereof include propylene glycol, neopentyl glycol, 2-methyl-1,3-propanediol, 1-methyl-1,3-propanediol, 2-methyl-2-ethyl-1,3-propanediol, 2,2-diethyl-1,3-propanediol, 2-methyl-2-propyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, 3-methyl-1,5-pentanediol, 2-methyl-2,4-pentanediol, 2,4-diethyl-1,5-pentanediol, 1,3,5-trimethyl-1,3-pentanediol, 2-methyl-1,6-hexanediol, 2-methyl-1,8-octanediol, 2-methyl-1,9-nonanediol, dimer diol, 4-methyl-1,7-heptanediol, 3-methyl-1,6-hexanediol, 1-methyl-1,6-hexanediol, 4-methyl-1,9-nonanediol, and 3-methyl-1,9-nonanediol.

[0056] Examples of the alicyclic diol include 1,4 - cyclohexanediol, 1,4 - cyclohexanedimethanol, 1,3 - cyclobutanediol, hydrogenated bisphenol A, and their ethylene oxide adducts or propion adducts, etc.

[0057] Examples of the aromatic diol include bisphenol A, 9,9 - bis(hydroxyphenyl)fluorene, 4,4'-thiodiphenol, 4,4'-methylenediphenol, 4,4'-dihydroxybiphenyl, o - dihydroxybenzene, m - dihydroxybenzene, p - dihydroxybenzene, 2,5 - naphthalenediol, p - xylenediol, and their ethylene oxide adducts or propylene oxide adducts, etc.

[0058] Among these polyols, diols are preferred. Examples of the diol include ethylene glycol, propylene glycol, 1,4 - butylene glycol, and neopentyl glycol, etc. These may be used alone or in combination of two or more.

[0059] The polyol may have polyester diol, polyether diol, polycaprolactone diol, polycarbonate diol, etc. Among them, the polyester resin (D) preferably contains a polyether diol represented by the following formula (1) in terms of further improving the appearance and physical properties of the molded article obtained from the thermoplastic resin composition containing the compatibilizer and two or more kinds of resins. HO(C m H 2m O) n H···(1) In the formula (1), m is an integer of 1 or more, and n is an integer of 1 or more.

[0060] In the formula (1), preferably, m = 2 to 10, n = 1 to 40, more preferably, m = 2 to 4, n = 1 to 35, and still more preferably m = 4, n = 3 to 30.

[0061] Thus, it is preferable that the polyester resin (D) contains an aromatic dicarboxylic acid and / or a polyether diol as constituent units.

[0062] In the polycondensation for producing the polyester resin (D), a hydroxycarboxylic acid such as p-hydroxybenzoic acid may coexist.

[0063] From the viewpoint of improving the tensile strength of the molded article, it is preferable that the polyester resin (D) has crystallinity. That is, it is preferable that the polyester resin (D) has a melting point. The melting point of the polyester resin (D) is not particularly limited, but is preferably 200°C or lower, more preferably 180°C or lower, and even more preferably 160°C or lower. Also, the melting point of the polyester resin (D) is preferably 80°C or higher, more preferably 100°C or higher, and even more preferably 120°C or higher. The melting point of the polyester resin (D) can be specified by the position of the melting peak obtained using a differential scanning calorimeter (DSC).

[0064] In addition, the glass transition temperature of the homopolymer of the polyester unit contained in the polyester resin (D) is not particularly limited, but from the viewpoint of improving the appearance of the molded article, it is preferably less than 0°C, more preferably -20°C or lower, still more preferably -30°C or lower, and most preferably -50°C or lower. Further, the glass transition temperature of the homopolymer of the polyester unit contained in the polyester resin (D) is preferably -100°C or higher, more preferably -90°C or higher, and still more preferably -80°C or higher. The glass transition temperature of the homopolymer of the polyester unit contained in the polyester resin (D) can be determined, for example, by differential scanning calorimetry (DSC), from the thermal change on the DSC curve reflecting the enthalpy relaxation occurring at the glass transition. When the polyester resin (D) contains a polymerized portion of a resin unit other than polyester, in the DSC curve, a peak derived from the homopolymer of the polyester unit and a peak derived from the polymerized portion of the resin unit other than polyester are observed. In this case, the glass transition temperature of the homopolymer of the polyester unit contained in the polyester resin (D) can be determined from the peak derived from the homopolymer of the polyester unit.

[0065] The melt viscosity of the polyester resin (D) is not particularly limited, but in order to reduce the reduction in processability, it is preferably 10 Pa·s or more, more preferably 50 Pa·s or more, still more preferably 100 Pa·s or more, still more preferably 150 Pa·s or more, still more preferably 200 Pa·s or more, and still more preferably 250 Pa·s or more.

[0066] On the other hand, in order to improve the dispersibility in the resin, the melt viscosity is preferably 950 Pa·s or less, more preferably 920 Pa·s or less, still more preferably 900 Pa·s or less, still more preferably 850 Pa·s or less, still more preferably 820 Pa·s or less, still more preferably 800 Pa·s or less, and still more preferably 750 Pa·s or less.

[0067] The melt viscosity of the polyester resin (D) is measured using a high-temperature type flow tester (CFT-500WX manufactured by Shimadzu Corporation), with a nozzle of φ1 mm × 1 cm, a load (test force) of 30 kg, and a temperature of 200°C.

[0068] The number average molecular weight of the polyester resin (D) is not particularly limited, but from the viewpoint of improving the tensile strength, it is preferably 3,000 or more, more preferably 8,000 or more, and even more preferably 10,000 or more. Also, if the number average molecular weight of the polyester resin (D) is too high, the dispersibility in the resin composition deteriorates. Therefore, the number average molecular weight is preferably 150,000 or less, more preferably 100,000 or less, and even more preferably 80,000 or less.

[0069] The mass average molecular weight of the polyester resin (D) is not particularly limited, but from the viewpoint of improving the tensile strength, it is preferably 5,000 or more, more preferably 10,000 or more, and even more preferably 30,000 or more. Also, if the mass average molecular weight of the polyester resin (D) is too high, the dispersibility in the resin composition deteriorates. Therefore, the mass average molecular weight is preferably 200,000 or less, more preferably 150,000 or less, and even more preferably 100,000 or less.

[0070] The number average molecular weight and mass average molecular weight of the polyester resin (D) are values in terms of standard polystyrene measured by dissolving the polyester resin (D) in an organic solvent and using gel permeation chromatography.

[0071] Such polyester resins (D) are not particularly limited. For example, the BYRON (registered trademark) series of crystalline polyester resins (difficult to dissolve in organic solvents) manufactured by Toyobo Co., Ltd. can be mentioned.

[0072] <1-3. Compatibilizer> The resin composition according to one aspect of the present invention can be used as a compatibilizer. In the total of 100 parts by mass of the polar group-containing polyolefin resin (C) and the polyester resin (D), which are used as the compatibilizer according to one aspect of the present invention, although there is no particular limitation, from the viewpoint of improving the appearance of the resulting molded article, the content of the polar group-containing polyolefin resin (C) is preferably 1 part by mass or more, more preferably 30 parts by mass or more, still more preferably 50 parts by mass or more, further preferably 60 parts by mass or more, and most preferably 70 parts by mass or more. Also, the content is preferably 99 parts by mass or less, more preferably 95 parts by mass or less, and still more preferably 90 parts by mass or less.

[0073] Further, the compatibilizer according to one aspect of the present invention may be a composition in which the polar group-containing polyolefin resin (C) and the polyester resin (D) are mixed. Also, the composition may contain a polymer in which at least a part of the polar group-containing polyolefin resin (C) and the polyester resin (D) are polymerized.

[0074] [[2. Resin Composition Containing Polyolefin Resin (A), Thermoplastic Resin (B), Polar Group-Containing Polyolefin Resin (C), and Polyester Resin (D)]] The resin composition according to one aspect of the present invention contains a polyolefin resin (A), a thermoplastic resin (B), a polar group-containing polyolefin resin (C), and a polyester resin (D). The thermoplastic resin (B) contains a polyester resin (a) and / or a polyamide resin (b). Also, the polyester resin (a) is a resin of a different type from the polyester resin (D). Since the polar group-containing polyolefin resin (C) and the polyester resin (D) are as described in the item of [[1. Resin Composition Containing Polar Group-Containing Polyolefin Resin (C) and Polyester Resin (D)]], the description thereof is omitted here.

[0075] [[2-1. Polyolefin Resin (A)]] As described above, the resin composition according to one aspect of the present invention contains a polyolefin resin (A). In one aspect of the present invention, the "polyolefin resin (A)" means that the proportion of olefin units or cycloolefin units is 80 mol% or more with respect to 100 mol% of all the constituent units constituting the resin, and it is a resin different from the polar group-containing polyolefin resin (C). Among them, with respect to 100 mol% of all the constituent units constituting the polyolefin resin (A), the total proportion of olefin units and cycloolefin units is preferably 85 mol% or more, more preferably 90 mol% or more.

[0076] Examples of the polyolefin resin (A) include homopolymers of α-olefins, copolymers of α-olefins, and cycloolefin polymers. Examples of the homopolymer of α-olefin include polyethylene, polypropylene, polybutene, poly(3-methyl-1-butene), poly(3-methyl-1-pentene), and poly(4-methyl-1-pentene). Examples of the copolymer of α-olefin include ethylene-propylene block or random copolymer, α-olefin-propylene block or random copolymer having 4 or more carbon atoms, ethylene-methyl methacrylate copolymer, and ethylene-vinyl acetate copolymer. Examples of the cycloolefin polymer include polycyclohexene and polycyclopentene.

[0077] Examples of polyethylene include low-density polyethylene, linear low-density polyethylene, and high-density polyethylene. Examples of polypropylene include isotactic polypropylene, syndiotactic polypropylene, hemi-isotactic polypropylene, and stereoblock polypropylene. In the α-olefin-propylene block or random copolymer having 4 or more carbon atoms, examples of the α-olefin having 4 or more carbon atoms include butene, 3-methyl-1-butene, 3-methyl-1-pentene, and 4-methyl-1-pentene.

[0078] In the resin composition according to one aspect of the present invention, the polyolefin resin (A) may be contained only one kind, or may be contained two or more kinds. These may be unused polymers or recycled polymers after once being used.

[0079] Among them, the polyolefin resin (A) is preferably polyethylene, polypropylene or polybutene, and more preferably polyethylene.

[0080] The melt mass flow rate of the polyolefin resin (A) is not particularly limited, but in order to improve mechanical properties, it is preferably 0.1 g / 10 min or more, more preferably 0.2 g / 10 min or more, and still more preferably 0.3 g / 10 min or more. On the other hand, in order to improve processability, the melt mass flow rate is preferably 70 g / 10 min or less, more preferably 60 g / 10 min or less, still more preferably 50 g / 10 min or less, still more preferably 30 g / 10 min or less, still more preferably 25 g / 10 min or less, still more preferably 15 g / 10 min or less, still more preferably 12.5 g / 10 min or less, and still more preferably 10 g / 10 min or less.

[0081] The melt mass flow rate of the polyolefin resin (A) can be calculated by the method according to JIS K7210. The temperature and load in the measurement of the melt mass flow rate shall follow the regulations for the materials specified by the material standards, and for the materials not specified, it shall be 190 °C and 2.16 kgf (21.18 N).

[0082] Examples of commercially available polyolefin resins (A) include, for example, Novatec (registered trademark) MA3, Novatec MA3H, Novatec MA1B, Novatec EA9, Novatec EA9HD, Novatec EA9FTD, Novatec EA7AD, Novatec FY6H, Novatec EA6A, Novatec FY6, Novatec FY6C, Novatec FY4, and Novatec SA3A manufactured by Japan Polypropylene Corporation; Prime Polypro (registered trademark) J105G, Prime Polypro J106G, Prime Polypro J106MG, Prime Polypro 107G, Prime Polypro J137G, Prime Polypro J108M, Evolue (registered trademark) SP2320, Evolue SP2520, Evolue SP2510, Evolue SP3010, Evolue SP4020, Evolue SP1071C, High-Zex (registered trademark) 1300J, High-Zex 2100J, High-Zex 2100JH, High-Zex 2200J, High-Zex 2208J, High-Zex 3300F, High-Zex 3600F, High-Zex 7000F, and High-Zex 8000F manufactured by Prime Polymer Co., Ltd.; and Novatec LL UF420, Novatec LL UF421, Novatec LL UF621, Novatec LL UF524, Novatec LL UF622, Novatec LL UF230, Novatec LL UF320, Novatec LL UF332, Novatec LL UA421, Novatec LL UF240, Novatec LL UF442, Novatec LL UF641, Novatec LL UF943, Novatec LL UJ960, Novatec LL UJ370, Novatec LL UJ580, Novatec LL UJ480, Novatec LL UJ990, Novatec LL UJ790, Novatec LL UE320, Novatec LL UR951, Novatec C6 SF720, Novatec C6 SF941, Novatec C6 SF8402, Novatec HD HJ360, Novatec HD 362N, Novatec HD HJ560, Novatec HD HJ580N, Novatec HD HJ490, Novatec HD HJ590N, Novatec HD HY420, Novatec HD HY530, Novatec HD HY430, Novatec HD HY331, Novatec HD HY540, Novatec HDExamples include HE122R, Novatech HD HF313, Novatech HD HF111K, Novatech HD HF560, Novatech HD HE121, Novatech HD HE212W, Novatech HD HE421, Novatech HD HB420R, Novatech HD HB338RE, Novatech HD HB332E, Novatech HD HB432E, Novatech HD HB530, Novatech HD HB216R, and Novatech HD HB111R.

[0083] <2-2. Thermoplastic resin (B)> The resin composition according to one aspect of the present invention contains a thermoplastic resin (B) including a polyester resin (a) and / or a polyamide resin (b). Here, the polyester resin (a) and / or the polyamide resin (b) may be a resin containing both the polyester resin (a) and the polyamide resin (b), or may be a resin containing only one of the polyester resin (a) or the polyamide resin (b).

[0084] (2-2-1. Polyester resin (a)) The polyester resin (a) contained in the thermoplastic resin (B) is a different type of polyester resin from the polyester resin (D). The polyester resin (a) may be a polycondensate of an aromatic or aliphatic dicarboxylic acid and a diol, similar to the polyester resin (D). In the production of the polyester resin (a), one type of dicarboxylic acid and diol may be selected and produced under normal polycondensation conditions, or two or more types may be appropriately combined and produced.

[0085] Examples of the dicarboxylic acid can include terephthalic acid, isophthalic acid, adipic acid, sebacic acid, naphthalene-1,4-dicarboxylic acid, naphthalene-2,6-dicarboxylic acid, and diphenyl ether-4,4'-dicarboxylic acid.

[0086] Examples of the diol include ethylene glycol, propylene glycol, 1,4-butylene glycol, neopentyl glycol, cyclohexanedimethanol, 2,2-bis(4-hydroxyphenyl)propane, etc. When polycondensing, hydroxycarboxylic acids such as p-hydroxybenzoic acid may coexist.

[0087] Typical examples of the polyester resin (a) produced from the above dicarboxylic acid and diol include polyethylene terephthalate and polybutylene terephthalate. Further, the polyester resin (a) may be a resin that is at least one of biomass-derived and biodegradable, such as polylactic acid containing lactic acid as a structural unit. Thus, the polyester resin (a) preferably contains at least one selected from polyethylene terephthalate, polybutylene terephthalate, and polylactic acid.

[0088] Also, the polyester resin (a) may be a recycled product after once using their molded articles, and further may be a mixture of unused products and recycled products. The polyester resin (a) suitable is one having an intrinsic viscosity (IV) measured at 25 ° C in a phenol / tetrachloroethylene = 50 / 50 (weight ratio) mixed solvent of 0.30 to 0.85 (dl / g).

[0089] The intrinsic viscosity of the polyester resin (a) is preferably more than 0.30 (dl / g) and less than 0.85 (dl / g). When the intrinsic viscosity of the polyester resin (a) to be used is 0.30 (dl / g) or less, the moldability deteriorates due to the low melt tension, and the mechanical properties of molded articles such as films may be unsatisfactory, which is not preferable. When the intrinsic viscosity of the polyester resin (a) to be used is 0.85 (dl / g) or more, the moldability may deteriorate due to the high melt viscosity.

[0090] (2-2-2. Polyamide resin (b)) The polyamide resin (b) is a polymer having an amide bond (-NHCO-) in the main chain. Examples of the polyamide resin (b) include polyamide resins (b) obtained by condensation polymerization of diamines and dicarboxylic acids, polyamide resins (b) obtained by ring-opening polymerization of lactams, polyamide resins (b) obtained by self-condensation of aminocarboxylic acids, and copolymers obtained by copolymerization of two or more monomers constituting these polyamide resins (b). These polyamide resins (b) may be used alone or in combination of two or more. When used in combination, methods such as blending these polyamide resins (b) and using them, or using polyamide resins (b) obtained by copolymerizing raw materials of these plural polyamide resins (b) can be mentioned.

[0091] Examples of the diamine include aliphatic diamines, alicyclic diamines, and aromatic diamines.

[0092] Examples of the aliphatic diamine include linear saturated aliphatic diamines having 2 to 20 carbon atoms and branched saturated aliphatic diamines having 3 to 20 carbon atoms. Examples of the linear saturated aliphatic diamine having 2 to 20 carbon atoms include ethylenediamine, propylenediamine, tetramethylenediamine, pentamethylenediamine, hexamethylenediamine, heptamethylenediamine, octamethylenediamine, nonamethylenediamine, decamethylenediamine, undecamethylenediamine, dodecamethylenediamine, and tridecamethylenediamine. Examples of the branched saturated aliphatic diamine having 3 to 20 carbon atoms include 2-methylpentamethylenediamine (also denoted as 2-methyl-1,5-diaminopentane), 2,2,4-trimethylhexamethylenediamine, 2,4,4-trimethylhexamethylenediamine, 2-methyloctamethylenediamine, and 2,4-dimethyloctamethylenediamine. Further, examples of the branched saturated aliphatic diamine having 3 to 20 carbon atoms include diamines having substituents branched from the main chain.

[0093] Examples of alicyclic diamines (also referred to as alicyclic diamines) include 1,4-cyclohexanediamine, 1,3-cyclohexanediamine, 1,3-cyclopentanediamine, and the like.

[0094] Examples of aromatic diamines include metaxylylenediamine, paraxylylenediamine, metaphenylenediamine, orthophenylenediamine, paraphenylenediamine, and the like.

[0095] Examples of dicarboxylic acids include aliphatic dicarboxylic acids, alicyclic dicarboxylic acids, aromatic dicarboxylic acids, and the like.

[0096] Examples of aliphatic dicarboxylic acids include straight-chain or branched saturated aliphatic dicarboxylic acids having 3 to 20 carbon atoms, such as malonic acid, dimethylmalonic acid, succinic acid, 2,2-dimethylsuccinic acid, 2,3-dimethylglutaric acid, 2,2-diethylsuccinic acid, 2,3-diethylglutaric acid, glutaric acid, 2,2-dimethylglutaric acid, adipic acid, 2-methyladipic acid, trimethyladipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, tetradecanedioic acid, hexadecanedioic acid, octadecanedioic acid, eicosanedioic acid, diglycolic acid, and the like.

[0097] Examples of alicyclic dicarboxylic acids include 1,4-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,3-cyclopentanedicarboxylic acid, and the like.

[0098] The number of carbon atoms in the alicyclic structure of the alicyclic carboxylic acid is not particularly limited, but from the viewpoint of the balance between the water absorption and crystallinity of the resulting polyamide resin, it is preferably 3 to 10, more preferably 5 to 10.

[0099] The alicyclic dicarboxylic acid may be unsubstituted or may have a substituent. Examples of the substituent in the alicyclic dicarboxylic acid include alkyl groups having 1 to 4 carbon atoms such as methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, and tert-butyl group.

[0100] Examples of the aromatic dicarboxylic acid include aromatic dicarboxylic acids having 8 to 20 carbon atoms which may be unsubstituted or substituted with a substituent. Examples of the substituent in the aromatic dicarboxylic acid include alkyl groups having 1 to 6 carbon atoms, aryl groups having 6 to 12 carbon atoms, arylalkyl groups having 7 to 20 carbon atoms, halogen groups such as chloro group and bromo group, alkylsilyl groups having 3 to 10 carbon atoms, sulfonic acid groups, and groups which are salts such as sodium salts thereof.

[0101] Examples of the aromatic dicarboxylic acid include terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, 2-chloroterephthalic acid, 2-methylterephthalic acid, 5-methylisophthalic acid, and 5-sodium sulfoisophthalic acid.

[0102] The dicarboxylic acid may further contain polyvalent carboxylic acids having a valence of 3 or more such as trimellitic acid, trimesic acid, or pyromellitic acid within a range not impairing the object of one aspect of the present invention.

[0103] Each of the above-described diamine and dicarboxylic acid may be used alone by only one kind or may be used in combination of two or more kinds.

[0104] Examples of the lactam include butyrolactam, pivalolactam, ε-caprolactam, caprylolactam, enantholactam, undecanolactam, and laurolactam (dodecanolactam). Among these, from the viewpoint of toughness, ε-caprolactam or laurolactam is preferable, and ε-caprolactam is more preferable.

[0105] Examples of the aminocarboxylic acid include compounds obtained by ring-opening of the above-described lactam (ω-aminocarboxylic acid, α,ω-aminocarboxylic acid, etc.). From the viewpoint of increasing the crystallinity of the polyamide resin, the aminocarboxylic acid is preferably a linear or branched saturated aliphatic carboxylic acid having 4 to 14 carbon atoms with the ω-position substituted by an amino group. Examples of such carboxylic acids include 6-aminocaproic acid, 11-aminoundecanoic acid, and 12-aminododecanoic acid. Further, examples of the aminocarboxylic acid also include para-aminomethylbenzoic acid and the like.

[0106] Examples of the above polyamide resin (b) include polyamide 4 (poly-α-pyrrolidone), polyamide 6 (polycaproamide), polyamide 11 (polyundecanamide), polyamide 12 (polydodecanamide), polyamide 46 (polytetramethylene adipamide), polyamide 56 (polypentamethylene adipamide), polyamide 66 (polyhexamethylene adipamide), polyamide 610 (polyhexamethylene sebacamide), polyamide 612 (polyhexamethylene dodecamide), polyamide 116 (polyundecamethylene adipamide), polyamide TMHT (trimethylhexamethylene terephthalamide), polyamide 6T (polyhexamethylene terephthalamide), polyamide 2Me-5T (poly-2-methylpentamethylene terephthalamide), polyamide 9T (polynonamethylene terephthalamide), 2Me-8T (poly-2-methyloctamethylene terephthalamide), polyamide 6I (polyhexamethylene isophthalamide), polyamide 6C (polyhexamethylene cyclohexanedicarboxamide), polyamide 2Me-5C (poly-2-methylpentamethylene cyclohexanedicarboxamide), polyamide 9C (polynonamethylene cyclohexanedicarboxamide), 2Me-8C (poly-2-methyloctamethylene cyclohexanedicarboxamide), polyamide PBCM12 (poly-bis(4-aminocyclohexyl)methane dodecamide), polyamide dimethyl PBCM12 (poly-bis(3-methyl-aminocyclohexyl)methane dodecamide), polyamide MXD6 (polymetaxylylene adipamide), polyamide 10T (polidecamethylene terephthalamide), polyamide 11T (polyundecamethylene terephthalamide), polyamide 12T (polydodecamethylene terephthalamide), polyamide 10C (polidecamethylene cyclohexanedicarboxamide), polyamide 11C (polyundecamethylene cyclohexanedicarboxamide), and polyamide 12C (polydodecamethylene cyclohexanedicarboxamide). Herein, "Me" represents a methyl group.

[0107] In addition, when polymerizing the above-mentioned various monomers to produce the polyamide resin (b), a terminal capping agent can be further added for molecular weight adjustment. The terminal capping agent is not particularly limited, and known ones can be used.

[0108] Examples of the terminal capping agent include monocarboxylic acids, monoamines, acid anhydrides, monoisocyanates, monoacid halides, monoesters, and monoalcohols. These may be used alone or in combination of two or more.

[0109] The monocarboxylic acid that can be used as the terminal capping agent may be any one having reactivity with an amino group. Examples include aliphatic monocarboxylic acids, alicyclic monocarboxylic acids, and aromatic monocarboxylic acids. Examples of the aliphatic monocarboxylic acid include formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, caprylic acid, lauric acid, tridecylic acid, myristic acid, palmitic acid, stearic acid, pivalic acid, and isobutyric acid. Examples of the alicyclic monocarboxylic acid include cyclohexanecarboxylic acid. Examples of the aromatic monocarboxylic acid include benzoic acid, toluic acid, α-naphthalenecarboxylic acid, β-naphthalenecarboxylic acid, methylnaphthalenecarboxylic acid, and phenylacetic acid. These may be used alone or in combination of two or more.

[0110] As the monoamine that can be used as a terminal blocking agent, those having reactivity with a carboxyl group may be used, and examples thereof include aliphatic monoamines, alicyclic monoamines, and aromatic monoamines. Examples of the aliphatic monoamine include methylamine, ethylamine, propylamine, butylamine, hexylamine, octylamine, decylamine, stearylamine, dimethylamine, diethylamine, dipropylamine, and dibutylamine. Examples of the alicyclic monoamine include cyclohexylamine and dicyclohexylamine. Examples of the aromatic monoamine include aniline, toluidine, diphenylamine, and naphthylamine. These may be used alone or in combination of two or more.

[0111] Examples of the acid anhydride that can be used as a terminal blocking agent include phthalic anhydride, maleic anhydride, benzoic anhydride, acetic anhydride, and hexahydrophthalic anhydride. These may be used alone or in combination of two or more.

[0112] Examples of the monoisocyanate that can be used as a terminal blocking agent include phenyl isocyanate, tolyl isocyanate, dimethylphenyl isocyanate, cyclohexyl isocyanate, butyl isocyanate, and naphthyl isocyanate. These may be used alone or in combination of two or more.

[0113] Examples of the monoacid halide that can be used as a terminal blocking agent include halogen-substituted monocarboxylic acids such as benzoic acid, diphenylmethanecarboxylic acid, diphenylsulfonecarboxylic acid, diphenylsulfoxidecarboxylic acid, diphenylsulfidecarboxylic acid, diphenylethercarboxylic acid, benzophenonecarboxylic acid, biphenylcarboxylic acid, α-naphthalenecarboxylic acid, β-naphthalenecarboxylic acid, and anthracenecarboxylic acid. These may be used alone or in combination of two or more.

[0114] Examples of the monoester that can be used as the terminal blocking agent include glycerin monopalmitate, glycerin monostearate, glycerin monobehenate, glycerin monomontanate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol monobehenate, pentaerythritol monomontanate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monobehenate, sorbitan monomontanate, sorbitan dimontanate, sorbitan trimontanate, sorbitol monopalmitate, sorbitol monostearate, sorbitol monobehenate, sorbitol tribehenate, sorbitol monomontanate, and sorbitol dimontanate. These may be used alone or in combination of two or more.

[0115] Examples of the monoalcohol that can be used as the terminal blocking agent include propanol, butanol, pentanol, hexanol, heptanol, octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, docosanol, tricosanol, tetracosanol, hexacosanol, heptacosanol, octacosanol, triacontanol (linear or branched), oleyl alcohol, behenyl alcohol, phenol, cresol (o-, m- or p-isomer), biphenol (o-, m- or p-isomer), 1-naphthol, and 2-naphthol. These may be used alone or in combination of two or more.

[0116] Among these, the polyamide resin (b) is preferably polyamide 4 (poly-α-pyrrolidone), polyamide 6 (polycaproamide), polyamide 11 (polyundecanamide), polyamide 12 (polydodecanamide), polyamide 46 (polytetramethylene adipamide), polyamide 56 (polypentamethylene adipamide), polyamide 66 (polyhexamethylene adipamide), polyamide 610 (polyhexamethylene sebacamide), polyamide 612 (polyhexamethylene dodecamide), polyamide 116 (polyundecamethylene adipamide), or the like.

[0117] The mass average molecular weight of the polyamide resin (b) is not particularly limited, but for mechanical properties, it is preferably 10,000 or more, more preferably 15,000 or more, and still more preferably 20,000 or more. On the other hand, for processability, the mass average molecular weight is preferably 70,000 or less, more preferably 65,000 or less, and still more preferably 60,000 or less. The mass average molecular weight of the polyamide resin (b) can be measured by gel permeation chromatography.

[0118] Examples of commercially available products of the polyamide resin (b) include UBE Nylon 1013B, UBE1022B, and UBE1030B manufactured by Ube Industries, Ltd.; Gramide (registered trademark) T-802, Gramide T-860, Gramide T-222SA, Gramide T-662, and Gramide T-656E manufactured by Toyobo Co., Ltd.; Unitika Nylon A1020BRL, Unitika Nylon A1030BRL, Unitika Nylon A1030BRF, Unitika Nylon A1030BRT, Unitika Nylon M1040, and Unitika Nylon A125 manufactured by Unitika Ltd.; and Amilan (registered trademark) CM1007, Amilan CM1017, Amilan CM1017XL3, Amilan CM1017K, Amilan CM1026, Amilan CM3007, Amilan CM3001-N, Amilan CM3006, and Amilan CM3301L manufactured by Toray Industries, Inc.

[0119] <2-3. Resin Composition> In the resin composition according to one aspect of the present invention, the content of the polyolefin resin (A) in a total of 100 parts by mass of the polyolefin resin (A), the thermoplastic resin (B), the polar group-containing polyolefin resin (C), and the polyester resin (D) is not particularly limited. However, for the purpose of reducing the weight of the resulting molded article, it is preferably 1 part by mass or more, more preferably 5 parts by mass or more, still more preferably 7.5 parts by mass or more, and even more preferably 10 parts by mass or more. On the other hand, for the purpose of improving the heat resistance of the resulting molded article, the content of the polyolefin resin (A) is preferably 99 parts by mass or less, more preferably 95 parts by mass or less, still more preferably 92.5 parts by mass or less, and even more preferably 90 parts by mass or less.

[0120] In the resin composition, the content of the thermoplastic resin (B) in a total of 100 parts by mass of the polyolefin resin (A), the thermoplastic resin (B), the polar group-containing polyolefin resin (C), and the polyester resin (D) is not particularly limited. However, for the purpose of improving the heat resistance of the resulting molded article, it is preferably 1 part by mass or more, more preferably 5 parts by mass or more, still more preferably 7.5 parts by mass or more, and even more preferably 10 parts by mass or more. On the other hand, for the purpose of reducing the weight of the resulting molded article, the content of the thermoplastic resin (B) is preferably 99 parts by mass or less, more preferably 95 parts by mass or less, still more preferably 92.5 parts by mass or less, and even more preferably 90 parts by mass or less.

[0121] In the resin composition, the content of the polar group-containing polyolefin resin (C) in a total of 100 parts by mass of the polyolefin resin (A), the thermoplastic resin (B), the polar group-containing polyolefin resin (C), and the polyester resin (D) is not particularly limited. However, in order to enhance the affinity between the polyolefin resin (A), the thermoplastic resin (B), and other components described later, it is preferably 0.1 part by mass or more, more preferably 0.3 part by mass or more, and even more preferably 0.5 part by mass or more. On the other hand, in order to improve the appearance of the molded article, the content of the polar group-containing polyolefin resin (C) is preferably 20 parts by mass or less, more preferably 10 parts by mass or less, even more preferably 7.5 parts by mass or less, and even more preferably 5 parts by mass or less.

[0122] In the resin composition, the content of the polyester resin (D) in a total of 100 parts by mass of the polyolefin resin (A), the thermoplastic resin (B), the polar group-containing polyolefin resin (C), and the polyester resin (D) is not particularly limited. However, in order to enhance the affinity between the polyolefin resin (A), the thermoplastic resin (B), and other components described later, it is preferably 0.1 part by mass or more, more preferably 0.3 part by mass or more, and even more preferably 0.5 part by mass or more. On the other hand, in order to improve the appearance of the molded article, the content of the polyester resin (D) is preferably 20 parts by mass or less, more preferably 10 parts by mass or less, even more preferably 7.5 parts by mass or less, and even more preferably 5 parts by mass or less.

[0123] The ratio of the total amount of the polyolefin resin (A) and the thermoplastic resin (B) in 100 parts by mass of the resin composition is not particularly limited. However, in order to improve processability, it is preferably 10 parts by mass or more, more preferably 20 parts by mass or more, and even more preferably 30 parts by mass or more. On the other hand, in order to improve the appearance of the molded article, the ratio of the total amount is preferably 99.9 parts by mass or less, more preferably 99.8 parts by mass or less, and even more preferably 99.7 parts by mass or less.

[0124] The resin composition may contain other components in addition to the polyolefin resin (A), the thermoplastic resin (B), the polar group-containing polyolefin resin (C), and the polyester resin (D).

[0125] Examples of the other components include fillers. In one aspect of the present invention, the filler is defined as a component that is added for the purpose of imparting mechanical strength, light reflection / scattering, flame retardancy, sound insulation, or vibration damping, etc., and has a melting point equal to or higher than the processing temperature of the resin composition.

[0126] The filler is not particularly limited, and examples include inorganic fillers or organic fillers. The inorganic filler is not particularly limited, and examples include glass fiber, glass beads, talc, barium sulfate, wollastonite, kaolin, fine powder silica, mica, calcium silicate, aluminum oxide, and magnesium oxide, etc. The organic filler is not particularly limited, and examples include wood powder, paper powder, cellulose fiber, and carbon fiber, etc.

[0127] Among them, the filler is preferably an inorganic filler, paper powder, or cellulose fiber, and more preferably a glass filler, glass beads, paper powder, or cellulose fiber.

[0128] When the resin composition contains a filler, the proportion is not particularly limited, but from the viewpoint of improving mechanical strength, it is preferably 10 parts by mass or more, more preferably 15 parts by mass or more, and still more preferably 20 parts by mass or more with respect to 100 parts by mass of the resin composition. On the other hand, from the viewpoint of good moldability, the proportion of the filler is preferably 70 parts by mass or less, more preferably 60 parts by mass or less, and still more preferably 50 parts by mass or less.

[0129] In addition, examples of other components include resins other than polyolefin resin (A), thermoplastic resin (B), polar group-containing polyolefin resin (C), and polyester resin (D). Further, examples of other components include flame retardants (e.g., phosphorus-based, bromine-based, silicone-based, and organic metal salt-based, etc.), drip preventives (e.g., fluorinated polyolefin, silicone, and aramid fiber, etc.), lubricants (e.g., long-chain fatty acid metal salts such as magnesium stearate, etc.), mold release agents (e.g., pentaerythritol tetrastearate, etc.), nucleating agents, antistatic agents, stabilizers (e.g., phenolic stabilizers, sulfur-based stabilizers, phosphorus-based stabilizers, ultraviolet absorbers, and amine-based light stabilizers, etc.), plasticizers, pigments, and dyes, etc. Note that well-known materials can be used for these other components, and they can be arbitrarily selected and used according to the application for which the resin composition is used. Also, each of the other components in the resin composition can be arbitrarily selected.

[0130] There is no particular limitation on the ratio of other components in 100 parts by mass of the resin composition, but usually, it is 0.1 part by mass or more, and on the other hand, it is preferably 60 parts by mass or less, and more preferably 50 parts by mass or less.

[0131] To produce the resin composition according to one aspect of the present invention, any method can be employed. For example, polyolefin resin (A), thermoplastic resin (B), polar group-containing polyolefin resin (C), polyester resin (D), and, if necessary, other components are mixed. The mixing may be carried out using preliminary mixing means such as a V-type blender, Henschel mixer, mechanochemical apparatus, or extrusion mixer, etc. Also, in some cases, the mixture obtained by mixing is granulated using an extrusion granulator or briquetting machine, etc., and then melt-kneaded and extruded using a melt-kneading machine.

[0132] Examples of the melt kneader include twin-screw extruders such as vented twin-screw extruders, Banbury mixers, kneading rolls, single-screw extruders, and multi-screw extruders with three or more shafts. The temperature during melt kneading is, for example, 200 to 320°C. The resin composition extruded as described above is directly cut by a device such as a pelletizer to be pelletized, or is cooled to form a strand, and then the strand is cut by a device such as a pelletizer to be pelletized.

[0133] [3. Molded article] By molding the resin composition according to one aspect of the present invention, a molded article can be obtained. Examples of the uses of the resin composition include molded articles obtained by recycling parts of automobiles, motorcycles, ships, electrical and electronic parts, sundries, fibers, films, molded products, etc., and molded articles useful in other fields.

[0134] The molded article contains a compatibilizer according to one aspect of the present invention, or a resin composition according to one aspect of the present invention. That is, the molded article contains a polar group-containing polyolefin resin (C) and a polyester resin (D), and may further contain a polyolefin resin (A) and a thermoplastic resin (B). The same applies to the film, which is cited as one aspect of the molded article.

[0135] The preferred ratio of each component in the molded article is the same as the preferred ratio described for the above resin composition. The shape of the molded article is not particularly limited, and it can take various shapes such as resin plates, sheets, films, cables, fibers, or shaped articles.

[0136] The films and sheets obtained from the resin composition according to one aspect of the present invention may be laminated with two or more other base materials such as polyolefins such as polyethylene or polypropylene, polyvinyl chloride, polyamide, ethylene-vinyl alcohol copolymer, aluminum foil, and paper, depending on the application.

[0137] The molding method for obtaining a molded article according to one aspect of the present invention is not particularly limited, and examples include extrusion, calendering, injection molding, rolling, compression molding, blow molding, and the like. The temperature for molding the molded article is, for example, 200 to 320°C.

[0138] 〔4. Summary〕 As described above, the present invention has the following aspects.

[0139] The resin composition according to Aspect 1 of the present invention contains a polar group-containing polyolefin resin (C) and a polyester resin (D), and the glass transition temperature of the homopolymer of the polyester unit contained in the polyester resin (D) is less than 0°C.

[0140] The resin composition according to Aspect 2 of the present invention is such that, in Aspect 1, the polar group contained in the polar group-containing polyolefin resin (C) may be at least one selected from the group consisting of an epoxy group, a hydroxyl group, a carboxyl group, an acid anhydride group, an oxazoline group, and an amino group.

[0141] The resin composition according to Aspect 3 of the present invention is such that, in Aspect 1 or 2, the acid value of the polar group-containing polyolefin resin (C) may be 100 mg·KOH / g or less.

[0142] The resin composition according to Aspect 4 of the present invention is such that, in any one of Aspects 1 to 3, the melt mass flow rate of the polar group-containing polyolefin resin (C) at 190°C and 2.16 kgf (21.18 N) may be 0.1 g / 10 min or more and 200 g / 10 min or less.

[0143] The resin composition according to Aspect 5 of the present invention is such that, in any one of Aspects 1 to 4, the polyester resin (D) may contain an aromatic dicarboxylic acid and / or a polyether diol as a structural unit.

[0144] In the resin composition according to Aspect 6 of the present invention, in any one of Aspects 1 to 5, the melting point of the polyester resin (D) may be 200°C or lower.

[0145] In the resin composition according to Aspect 7 of the present invention, in any one of Aspects 1 to 6, the melt viscosity of the polyester resin (D) at 200°C may be 10 Pa·s or more and 950 Pa·s or less.

[0146] In the resin composition according to Aspect 8 of the present invention, in any one of Aspects 1 to 7, the number average molecular weight of the polyester resin (D) may be 3,000 or more and 150,000 or less.

[0147] In the resin composition according to Aspect 9 of the present invention, in any one of Aspects 1 to 8, in 100 parts by mass in total of the polar group-containing polyolefin resin (C) and the polyester resin (D), the content of the polar group-containing polyolefin resin (C) may be 1 part by mass or more and 99 parts by mass or less.

[0148] The compatibilizer according to Aspect 10 of the present invention contains the resin composition according to any one of Aspects 1 to 9.

[0149] In the resin composition according to Aspect 11 of the present invention, in any one of Aspects 1 to 9, it may further contain a polyolefin resin (A), a thermoplastic resin (B) containing a polyester resin (a) and / or a polyamide resin (b).

[0150] In the resin composition according to Aspect 12 of the present invention, in Aspect 11, the polyolefin resin (A) may be polyethylene.

[0151] In the resin composition according to Aspect 13 of the present invention, in Aspect 11 or 12, the polyester resin (a) may contain at least one polyester resin selected from polyethylene terephthalate, polybutylene terephthalate, and polylactic acid.

[0152] In the resin composition according to Aspect 14 of the present invention, in any one of Aspects 11 to 13, the mass average molecular weight of the polar group-containing polyolefin resin (C) may be 50,000 or more.

[0153] In the resin composition according to Aspect 15 of the present invention, in any one of Aspects 11 to 14, the polar group-containing polyolefin resin (C) may be a copolymer of a carboxylic acid and / or a carboxylic acid derivative and a polyolefin or an olefin-based elastomer.

[0154] In the resin composition according to Aspect 16 of the present invention, in Aspect 15, the polyolefin may be polyethylene.

[0155] In the resin composition according to Aspect 17 of the present invention, in Aspect 15 or 16, the structural unit derived from the carboxylic acid and / or the carboxylic acid derivative may be in the graft chain of the polar group-containing polyolefin resin (C).

[0156] In the resin composition according to Aspect 18 of the present invention, in any one of Aspects 15 to 17, the carboxylic acid and / or the carboxylic acid derivative may be a dicarboxylic anhydride.

[0157] In the resin composition according to Aspect 19 of the present invention, in any one of Aspects 11 to 18, in a total of 100 parts by mass of the polyolefin resin (A), the thermoplastic resin (B), the polar group-containing polyolefin resin (C), and the polyester resin (D), the content of the polar group-containing polyolefin resin (C) may be 0.1 part by mass or more and 20 parts by mass or less, and the content of the polyester resin (D) may be 0.1 part by mass or more and 20 parts by mass or less.

[0158] In the resin composition according to Aspect 20 of the present invention, in any of the aspects 11 to 19, the content of the polyolefin resin (A) in a total of 100 parts by mass of the polyolefin resin (A), the thermoplastic resin (B), the polar group-containing polyolefin resin (C), and the polyester resin (D) is 1 part by mass or more and 99 parts by mass or less, and the content of the thermoplastic resin (B) may be 1 part by mass or more and 99 parts by mass or less.

[0159] The molded article according to Aspect 21 of the present invention contains the resin composition according to any of the aspects 1 to 9, 11 to 20, or the compatibilizer according to Aspect 10.

[0160] The film according to Aspect 22 of the present invention contains the resin composition according to any of the aspects 1 to 9, 11 to 20, or the compatibilizer according to Aspect 10.

[0161] The method for producing a film according to Aspect 23 of the present invention involves melt-kneading the resin composition according to any of the aspects 11 to 20.

[0162] 〔5. Supplementary Notes〕 The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

Examples

[0163] Hereinafter, one aspect of the present invention will be specifically described with reference to examples. However, the present invention is not limited by the following examples. In the following examples, etc., % is based on mass unless otherwise specified.

[0164] 〔Examples 1 to 12, Comparative Examples 1 to 21〕 Each raw material was blended at the ratios shown in Tables 1 and 2 below and mixed by hand blending. Then, using a φ30 mm co-rotating twin-screw extruder (model name "PCM-30", manufactured by Ikegai Corporation), melt-kneading was performed under the conditions of a screw rotation speed of 150 rpm and a cylinder temperature of 250 to 270 °C to obtain a resin composition.

[0165] The details of each raw material shown in Table 1 and Table 2 are as follows.

[0166] Polyolefin resin (A-1): Linear low-density polyethylene resin (manufactured by Prime Polymer Co., Ltd., Evolue SP2520, melt mass flow rate 1.9 g / 10 min) Polyester resin (a-1): Polyethylene terephthalate resin (manufactured by Teijin Limited, TRN-MTJ, intrinsic viscosity (IV) = 0.53 dl / g) Polyamide resin (b-1): Nylon 6 resin (manufactured by Ube Industries, Ltd., Ube Nylon 1022B, number average molecular weight 22,000) Polar group-containing polyolefin resin (C-1): Maleic anhydride-modified elastomer (acid value 5 mgKOH / g, melt mass flow rate 2 g / 10 min, elastomer: α-olefin-ethylene copolymer, density 0.88 g / cm 3 ) Polar group-containing polyolefin resin (C-2): Maleic anhydride-modified elastomer (acid value 5 mgKOH / g, melt mass flow rate 25 g / 10 min, elastomer: α-olefin-ethylene copolymer, density 0.87 g / cm 3 ) Polar group-containing polyolefin resin (C-3): Maleic anhydride-modified polyethylene (acid value 10 mgKOH / g, melt mass flow rate 3 g / 10 min, mass average molecular weight 149,000, density 0.92 g / cm 3 ) Polar group-containing polyolefin resin (C-4): Maleic anhydride-modified elastomer (acid value 24 mgKOH / g, melt mass flow rate 0.5 g / 10 min, elastomer: α-olefin-ethylene copolymer) Polar group-containing polyolefin resin (C-5): Maleic anhydride-modified elastomer (acid value 7 mgKOH / g, melt mass flow rate 6.3 g / 10 min, elastomer: α-olefin-ethylene copolymer, density 0.88 g / cm 3 ) Polyester resin (D-1): A polyester resin having terephthalic acid, isophthalic acid, 1,4-butanediol, and polytetramethylene glycol as constituent units (melting point 139 °C, glass transition temperature -70 °C, melt viscosity at 200 °C 385 Pa·s, number average molecular weight 32,000) Polyester resin (D-2): A polyester resin having dimethyl terephthalate, dimethyl isophthalate, 1,4-butanediol, and polytetramethylene glycol as constituent units (melting point 152 °C, glass transition temperature -55 °C, melt viscosity at 200 °C 620 Pa·s) Polyester resin (D-3): A polyester resin having terephthalic acid, isophthalic acid, adipic acid, 1,4-butanediol, and ethylene glycol as constituent units (melting point 143 °C, glass transition temperature 19 °C, melt viscosity at 200 °C 460 Pa·s) Polyester resin (D-4): A polyester resin having terephthalic acid, isophthalic acid, and 1,4-butanediol as constituent units (melting point 179 °C, glass transition temperature 27 °C, melt viscosity at 200 °C 150 Pa·s)

[0167] The melt mass flow rate of the polar group-containing polyolefin resins (C-1) to (C-5) was measured under the conditions of 190 °C and 2.16 kgf (21.18 N).

[0168] Regarding the pellets of the obtained resin composition, they were dehumidified and dried at 80 °C for one day and night, a 150 mm wide T-die was attached, and a film as a molded body was formed under the following conditions using a 30 mmφ single-screw extruder (L / D = 25) equipped with a screen mesh; Examples 1 to 3 and Comparative Examples 1, 3 to 7, 16 to 19: Cylinder temperature 230 to 250 °C, T-die temperature 270 °C, film thickness about 60 μm Examples 4 to 6 and Comparative Examples 2, 8 to 10, 20, 21: Cylinder temperature 250 to 270 °C, T-die temperature 270 °C, film thickness about 70 μm Examples 7 to 12 and Comparative Examples 11 to 15: Cylinder temperature 250 to 270 °C, T-die temperature 270 °C, film thickness about 80 μm

[0169] Using each film, the evaluations described below were conducted.

[0170] 〔Transmittance (HAZE)〕 The transmittance (HAZE) was measured using the obtained film in accordance with JIS K-7361.

[0171] 〔Tensile Test〕 The tensile modulus of elasticity and the elongation at break were measured using the obtained film in accordance with ISO-527 at a tensile speed of 50 mm / min.

[0172] 〔Appearance Evaluation (Presence or Absence of Spots)〕 Regarding the appearance, using the obtained film, the presence or absence of spots was visually evaluated. In Table 1, films without spots are indicated as 〇, and films with confirmed spots are indicated as ×.

[0173] 〔Appearance Evaluation (Fish Eyes)〕 Regarding the appearance, using the obtained film, the number of fish eyes was measured and evaluated. An offline type FE counter (manufactured by Meck Co., Ltd., model: LSC-4500) was used to detect fish eyes with a size of 0.18 mm or more in the film. Also, the measurement area was set to be 910 cm², and the total number of fish eyes in 910 cm² was measured. In Table 2, the measured number of fish eyes is indicated as "FE". Note that in Table 2, "-" indicates unmeasured. 2 and above in size. Also, the measurement area was set to be a total of 910 cm² 2 so that, and the total number of fish eyes in 910 cm² 2 was measured. In Table 2, the measured number of fish eyes is indicated as "FE". Note that in Table 2, "-" indicates unmeasured.

[0174] 〔Results〕 The obtained results are shown in Table 1 and Table 2 below.

[0175]

Table 1

[0176]

Table 2

[0177] From the comparison between each example and each comparative example, in the molded article of the resin composition containing the polyolefin resin (A) and the thermoplastic resin (B), it was shown that by including the polar group-containing polyolefin resin (C) and the polyester resin (D), the color unevenness is reduced because the HAZE is small.

[0178] Also, from the comparison between Examples 1 to 3 and Comparative Examples 1, 3 to 7, 16, 17, Examples 4 to 6 and Comparative Examples 2, 8 to 10, Example 7 and Comparative Examples 11, 12, 18, Examples 8 to 12 and Comparative Examples 13 to 15, 19 to 21, it was shown that the molded article of the resin composition can obtain good tensile strength by containing the polar group-containing polyolefin resin (C) and the polyester resin (D).

[0179] Also, from the comparison between Examples 9, 10 and Comparative Examples 11, 13, it was shown that by containing the polar group-containing polyolefin resin (C) and the polyester resin (D), a molded article excellent in appearance properties with both reduced color unevenness and the number of fish eyes can be obtained.

[0180] From the above results, in the molded article of the resin composition, it was shown that the polar group-containing polyolefin resin (C) and the polyester resin (D) functioned as a compatibilizer to improve the compatibility between the polyolefin resin (A) and the thermoplastic resin (B). That is, it was shown that a resin composition capable of obtaining a molded article excellent in appearance properties and transparency and further having good tensile strength can be realized by the resin composition (compatibilizer) according to one aspect of the present invention.

Industrial Applicability

[0181] The resin composition according to one aspect of the present invention is well compatible with a polyolefin resin and a thermoplastic resin containing a polyester resin and / or a polyamide resin. With such a resin composition, a molded article having excellent appearance properties can be obtained.

[0182] The molded article obtained using the resin composition according to one aspect of the present invention can be suitably used for molded articles obtained by recycling parts of automobiles, motorcycles, ships, electrical and electronic parts, sundries, fibers, films, and molded products, and molded articles useful in other fields, etc.

Claims

1. A resin composition comprising a polar group-containing polyolefin resin (C) and a polyester-based resin (D), wherein the glass transition temperature of a homopolymer of a polyester unit contained in the polyester-based resin (D) is lower than 0°C.

2. The resin composition according to claim 1, wherein the polar group of the polar group-containing polyolefin resin (C) is at least one selected from the group consisting of an epoxy group, a hydroxyl group, a carboxyl group, an acid anhydride group, an oxazoline group, and an amino group.

3. The resin composition according to claim 1, wherein the acid value of the polar group-containing polyolefin resin (C) is 100 mg·KOH / g or less.

4. The resin composition according to claim 1, wherein the polar group-containing polyolefin resin (C) has a melt mass flow rate at 190°C and 2.16 kgf (21.18 N) of 0.1 g / 10 min or more and 200 g / 10 min or less.

5. The resin composition according to claim 1 , wherein the polyester resin (D) contains an aromatic dicarboxylic acid and / or a polyether diol as a constituent unit.

6. The resin composition according to claim 1, wherein the polyester resin (D) has a melting point of 200° C. or lower.

7. The resin composition according to claim 1, wherein the polyester resin (D) has a melt viscosity at 200°C of 10 Pa·s or more and 950 Pa·s or less.

8. The resin composition according to claim 1, wherein the polyester resin (D) has a number average molecular weight of 3,000 or more and 150,000 or less.

9. 2. The resin composition according to claim 1, wherein the content of the polar group-containing polyolefin resin (C) is 1 part by mass or more and 99 parts by mass or less in a total of 100 parts by mass of the polar group-containing polyolefin resin (C) and the polyester-based resin (D).

10. A compatibilizer comprising the resin composition according to claim 1.

11. A polyolefin resin (A), The resin composition according to claim 1, further comprising a thermoplastic resin (B) containing a polyester resin (a) and / or a polyamide resin (b).

12. The resin composition according to claim 11, wherein the polyolefin resin (A) is polyethylene.

13. The resin composition according to claim 11, wherein the polyester resin (a) comprises at least one polyester resin selected from polyethylene terephthalate, polybutylene terephthalate, and polylactic acid.

14. The resin composition according to claim 11, wherein the polar group-containing polyolefin resin (C) has a mass average molecular weight of 50,000 or more.

15. The resin composition according to claim 11, wherein the polar group-containing polyolefin resin (C) is a copolymer of a carboxylic acid and / or a carboxylic acid derivative with a polyolefin or an olefin-based elastomer.

16. The resin composition according to claim 15, wherein the polyolefin is polyethylene.

17. The resin composition according to claim 15, wherein the structural unit derived from the carboxylic acid and / or the carboxylic acid derivative is present in a graft chain of the polar group-containing polyolefin resin (C).

18. The resin composition according to claim 15, wherein the carboxylic acid and / or carboxylic acid derivative is a dicarboxylic acid anhydride.

19. In a total of 100 parts by mass of the polyolefin resin (A), the thermoplastic resin (B), the polar group-containing polyolefin resin (C), and the polyester-based resin (D), The content of the polar group-containing polyolefin resin (C) is 0.1 parts by mass or more and 20 parts by mass or less, The resin composition according to claim 11, wherein the content of the polyester resin (D) is 0.1 parts by mass or more and 20 parts by mass or less.

20. In a total of 100 parts by mass of the polyolefin resin (A), the thermoplastic resin (B), the polar group-containing polyolefin resin (C), and the polyester-based resin (D), The content of the polyolefin resin (A) is 1 part by mass or more and 99 parts by mass or less, The resin composition according to claim 11, wherein the content of the thermoplastic resin (B) is 1 part by mass or more and 99 parts by mass or less.

21. A molded article comprising the resin composition according to any one of claims 1 to 9 and 11 to 20, or the compatibilizer according to claim 10.

22. A film comprising the resin composition according to any one of claims 1 to 9 and 11 to 20, or the compatibilizer according to claim 10.

23. A method for producing a film, comprising melt-kneading the resin composition according to any one of claims 11 to 20.

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