Resin composition

Abstract

To provide a resin composition which contains an olefinic polymer and a thermoplastic polyester and has excellent dyeability.SOLUTION: A resin composition contains an olefinic polymer A, a polymer B-1, and a polymer B-2. The polymer B-1 is an aliphatic polyester-based polymer. The polymer B-2 is an aromatic polyester-based polymer having a heat of fusion obtained by differential scanning calorimetry within a range of 0-25 J / g. A content of the polymer A is 64-95 pts.mass, a content of the polymer B-1 is 1-15 pts.mass, and a content of the polymer B-2 is 1-35 pts.mass based on 100 pts.mass of the total of the polymer A, the polymer B-1 and the polymer B-2.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a resin composition. [Background technology]

[0002] Among thermoplastic resins, olefin polymers are inexpensive and lightweight, and have excellent properties such as moldability, mechanical properties, heat resistance, and long-term heat deterioration resistance. For this reason, olefin polymers are used in various containers such as bottles, food packaging materials, container caps, stationery, daily necessities, fibers for carpets and sofas, interior and exterior materials for automobiles, parts for electric and electronic devices, building materials such as interior materials for buildings and houses, etc. In recent years, there is often a demand for improvements in airtightness, paintability, dyeability, etc., for these articles.

[0003] Thus, as one means for responding to these demands, as described in Patent Document 1, a method of blending a thermoplastic polyester, typified by polyethylene terephthalate and polybutylene terephthalate, which has better airtightness, paintability, and dyeability than an olefin-based polymer, with an olefin-based polymer can be considered. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-261070 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, olefin polymers and thermoplastic polyesters have poor compatibility with each other, and therefore, even if a composition containing a sufficiently melt-kneaded olefin polymer and a thermoplastic polyester is dyed with a disperse dye, there is a problem that it is difficult to efficiently dye the composition due to phase separation between the olefin polymer and the thermoplastic polyester.

[0006] The present invention has been made in view of the above problems, and an object of the present invention is to provide a resin composition which contains an olefin polymer and a thermoplastic polyester and has excellent dyeability. [Means for solving the problem]

[0007] [1] A resin composition comprising an olefin polymer A, a polymer B-1, and a polymer B-2, The polymer B-1 is an aliphatic polyester polymer, The polymer B-2 is an aromatic polyester polymer having a heat of fusion measured by differential scanning calorimetry in the range of 0 to 25 J / g, The resin composition, wherein the content of the polymer A is 64 to 95 parts by mass, the content of the polymer B-1 is 1 to 15 parts by mass, and the content of the polymer B-2 is 1 to 35 parts by mass, relative to 100 parts by mass in total of the polymer A, the polymer B-1, and the polymer B-2. [2] The resin composition according to [1], wherein the polymer B-1 is a polyhydroxyalkanoate-based polymer. [2] The resin composition according to [1], wherein the polymer B-1 is a poly(3-hydroxyalkanoate)-based polymer. [4] The resin composition according to any one of [1] to [3], wherein the content of the polymer A is 79 to 90 parts by mass, the content of the polymer B-1 is 1 to 15 parts by mass, and the content of the polymer B-2 is 1 to 20 parts by mass, relative to 100 parts by mass in total of the polymer A, the polymer B-1, and the polymer B-2. [5] The resin composition according to any one of [1] to [4], wherein the polymer A contains a propylene homopolymer. [6]: A molded article of the resin composition according to any one of [1] to [5]. [7] The molded body according to [6], which is a fiber. Effect of the Invention

[0008] According to the present invention, there is provided a resin composition which contains an olefin polymer and a thermoplastic polyester and has excellent dyeability. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, several embodiments of the present invention will be described in detail. However, the present invention is not limited to the following embodiments.

[0010] The resin composition according to the present invention contains an olefin-based polymer A, a polymer B-1, and a polymer B-2.

[0011] <Olefin Polymer A> The olefin polymer A is a polymer containing 50% by mass or more of structural units derived from an olefin having from 2 to 10 carbon atoms (wherein the total amount of the olefin polymer is taken as 100% by mass). Examples of the olefin having from 2 to 10 carbon atoms include ethylene, propylene, 1-butene, 4-methyl-1-pentene, 1-hexene, 1-octene, and 1-decene.

[0012] The olefin polymer A may contain a structural unit derived from a monomer other than an olefin having from 2 to 10 carbon atoms. Examples of the monomer other than an olefin having from 2 to 10 carbon atoms include aromatic vinyl monomers such as styrene, unsaturated carboxylic acids such as acrylic acid and methacrylic acid, unsaturated carboxylic acid esters such as methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, and ethyl methacrylate, vinyl ester compounds such as vinyl acetate, conjugated dienes such as 1,3-butadiene and 2-methyl-1,3-butadiene (isoprene), and non-conjugated dienes such as dicyclopentadiene and 5-ethylidene-2-norbornene.

[0013] The olefin polymer A can be at least one selected from the group consisting of ethylene polymers, propylene polymers, and butene polymers, and may be any combination of two or more of these.

[0014] An ethylene-based polymer is a polymer containing 50% by mass or more of structural units derived from ethylene, and examples thereof include ethylene homopolymer, ethylene-1-butene copolymer, ethylene-1-hexene copolymer, ethylene-1-octene copolymer, and ethylene-1-butene-1-hexene copolymer. The ethylene-based polymer may be a combination of two or more ethylene-based polymers.

[0015] The propylene-based polymer is a polymer containing 50% by mass or more of structural units derived from propylene, and examples thereof include propylene homopolymer, propylene-ethylene copolymer, propylene-1-butene copolymer, propylene-1-hexene copolymer, propylene-1-octene copolymer, propylene-ethylene-1-butene copolymer, propylene-ethylene-1-hexene copolymer, and propylene-ethylene-1-octene copolymer. The propylene-based polymer may be a combination of two or more kinds of propylene-based polymers. It is preferable that the olefin-based polymer A is a propylene-based polymer.

[0016] The butene polymer is a polymer containing 50% by mass or more of structural units derived from 1-butene, and examples thereof include 1-butene homopolymer, 1-butene-ethylene copolymer, 1-butene-propylene copolymer, 1-butene-1-hexene copolymer, 1-butene-1-octene copolymer, 1-butene-ethylene-propylene copolymer, 1-butene-ethylene-1-hexene copolymer, 1-butene-ethylene-1-octene copolymer, 1-butene-propylene-1-hexene copolymer, and 1-butene-propylene-1-octene copolymer. The butene polymer may be a combination of two or more butene polymers.

[0017] The olefin polymer may be one type of polymer or a mixture of two or more types of polymers.

[0018] The melt mass flow rate (MFR) of the olefin polymer A measured according to JIS K7210-2014 at a temperature of 230° C. or 190° C. and a load of 2.16 kgf is preferably 0.1 g / 10 min or more and 200 g / 10 min or less.

[0019] The melting point of the olefin polymer A may be from 110 to 180°C.

[0020] The above olefin polymer A can be produced by a known polymerization method using a known polymerization catalyst.

[0021] The olefin polymer A preferably contains a propylene homopolymer. The propylene homopolymer is a polymer consisting of only structural units derived from propylene. The mass ratio of the propylene homopolymer in the olefin polymer A may be 50% or more, 80% or more, or 100% by mass.

[0022] The melt mass flow rate of the propylene homopolymer measured under the conditions of a temperature of 230° C. and a load of 2.16 kgf can be 0.1 g / 10 min or more, 1 g / 10 min or more, 3 g / 10 min or more, or 5 g / 10 min or more from the viewpoint of processability. This melt mass flow rate can be 80 g / 10 min or less, 60 g / 10 min or less, 50 g / 10 min or less, 30 g / 10 min or less, or 20 g / 10 min or less. The melt mass flow rate of the propylene homopolymer is determined according to JIS K 7210-2014.

[0023] The propylene homopolymer may be a propylene homopolymer having an isotactic structure. Having an isotactic structure means that the isotactic pentad fraction (hereinafter also referred to as [mmmm]) measured using 13C-NMR is 0.85 or more. This [mmmm] is preferably 0.90 or more, and may be 0.95 or more, 0.96 or more, or 0.97 or more. [mmmm] may be 0.99 or less.

[0024] Here, the isotactic pentad fraction indicates the proportion of isotactic sequences in pentad units in a molecular chain measured using 13C-NMR, and is the fraction of propylene-derived structural units at the center of a chain in which five consecutive propylene-derived structural units are meso-bonded. Specifically, it is a value calculated as the fraction of the [mmmm] peak in the total absorption peaks in the methyl carbon region observed in the 13C-NMR spectrum. Here, the [mmmm] peak is a peak derived from propylene at the center of a chain in which five consecutive meso-bonded units are bonded.

[0025] The [mmmm] can be determined according to the method described in the report by A. Zambelli et al. (Macromolecules, 1973, No. 6).

[0026] The propylene homopolymer can be produced by a known polymerization method using a catalyst system formed by contacting a known solid titanium catalyst component, an organometallic compound catalyst component, and, if necessary, an electron donor; a catalyst system formed by contacting a transition metal compound of Group 4 of the periodic table having a cyclopentadienyl ring with an alkylaluminoxane; or a catalyst system formed by contacting a transition metal compound of Group 4 of the periodic table having a cyclopentadienyl ring, a compound that reacts with the transition metal compound to form an ionic complex, and an organoaluminum compound.

[0027] The olefin polymer A may contain, in addition to the propylene homopolymer, a propylene-ethylene copolymer containing 50% by mass or more of structural units derived from propylene. The mass ratio of the propylene-ethylene polymer in the olefin polymer A may be 1% or more, 3% or more, or 20% or less. The addition of a low melting point polymer may facilitate side feeding of additives.

[0028] <Aliphatic polyester polymer B-1>

[0029] The aliphatic polyester polymer B-1 has a structure of a polycondensation product of an aliphatic polycarboxylic acid component and an aliphatic polyhydric alcohol component, or a polycondensation product of an aliphatic hydroxycarboxylic acid, and the main chain of the repeating unit does not contain an aromatic hydrocarbon structure.

[0030] Examples of the aliphatic polyester polymer B-1 include a polymer of a hydroxycarboxylic acid or lactone, a polycondensate of a diol and a dicarboxylic acid, and a copolymer thereof. When the polymer B is a copolymer, the arrangement of the copolymer may be any of a random copolymer, an alternating copolymer, a block copolymer, a graft copolymer, and the like.

[0031] At least a part of these may be crosslinked with a crosslinking agent such as a polyisocyanate such as xylylene diisocyanate, 2,4-tolylene diisocyanate, etc., or a polysaccharide such as cellulose, acetyl cellulose, ethyl cellulose, etc. Furthermore, at least a part of these may have any structure such as a linear, cyclic, branched, star-shaped, or three-dimensional network structure, without any limitation, and may be a copolymer with a polyolefin resin or a graft polymer with a polyolefin resin.

[0032] The aliphatic polyester polymer B-1 can be used alone or in combination.

[0033] Examples of the hydroxycarboxylic acid include hydroxycarboxylic acids having 2 to 18 carbon atoms, preferably 6 or less carbon atoms, and most preferably 4 carbon atoms. Specific examples include glycolic acid, L-lactic acid, D-lactic acid, D,L-lactic acid, 3-hydroxybutyrate, 3-hydroxyvalerate, 3-hydroxypropionate, 4-hydroxybutyrate, 4-hydroxyvalerate, 5-hydroxyvalerate, 3-hydroxypentenoate, 3-hydroxyhexanoate, 3-hydroxyheptanoate, 3-hydroxyoctanoate, 3-hydroxynonanoate, and 3-hydroxydecanoate.

[0034] Examples of lactones include propiolactone, butyrolactone, valerolactone, caprolactone, and laurolactone.

[0035] The diol is preferably a diol having 2 to 10 carbon atoms. Among them, an aliphatic diol having 2 to 4 carbon atoms or an alicyclic diol having 5 or 6 carbon atoms is more preferable. Specific examples thereof include ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,2-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 1,10-decanediol, 1,12-dodecanediol, 1,14-tetradecanediol, 1,16-hexadecanediol, 1,18-octadecanediol, 1,2-cyclohexanediol, 1,4-cyclohexanediol, 1,2-cyclohexanedimethylol, and 1,4-cyclohexanedimethylol.

[0036] The dicarboxylic acid is preferably an aliphatic dicarboxylic acid having 2 to 12 carbon atoms. Among them, an aliphatic dicarboxylic acid having 2 to 6 carbon atoms or an alicyclic dicarboxylic acid having 5 to 6 carbon atoms is more preferable. Specific examples include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecadicarboxylic acid, dodecadicarboxylic acid, 1,14-tetradecanedicarboxylic acid, 1,16-hexadecanedicarboxylic acid, 1,18-octadecanedicarboxylic acid, dimer acid and its hydrogenated products, hexahydrophthalic acid, hexahydroisophthalic acid, and hexahydroterephthalic acid. These dicarboxylic acids may also be derivatives such as alkyl esters and acid anhydrides having 1 to 4 carbon atoms.

[0037] Of the above aliphatic polyester polymers B-1, it is preferable to use polylactic acid, polybutylene succinate, poly(butylene succinate-co-butylene adipate), polycaprolactone, poly(3-hydroxybutyrate), poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), and polyglycolic acid.

[0038] When polylactic acid is used as the aliphatic polyester polymer B-1, the polylactic acid preferably has an L-form ratio of 94 mol % or more in the lactic acid component constituting the polylactic acid. By setting the L-form ratio in this range, it is possible to prevent a decrease in the melting point.

[0039] <Polyhydroxyalkanoate polymer> The aliphatic polyester polymer B-1 may be a polyhydroxyalkanoate polymer. The polyhydroxyalkanoate polymer is a polyester of a hydroxyalkanoic acid. Examples of the hydroxyalkanoic acid include 2-hydroxyalkanoic acid, 3-hydroxyalkanoic acid, and 4-hydroxyalkanoic acid.

[0040] Examples of 2-hydroxyalkanoic acids are glycolic acid, lactic acid, and 2-hydroxybutyric acid. Examples of polyesters of 2-hydroxyalkanoic acids, i.e., poly(2-hydroxyalkanoate)-based polymers, are polyglycolic acid and polylactic acid.

[0041] Examples of 3-hydroxyalkanoic acids are 3-hydroxybutyric acid, 3-hydroxypropionic acid, 3-hydroxypentanoic acid, and 3-hydroxyhexanoic acid. Polyesters of 3-hydroxyalkanoic acids, i.e., poly(3-hydroxyalkanoate)-based polymers, will be described in detail later.

[0042] Examples of 4-hydroxyalkanoic acids are 4-hydroxybutyric acid, 4-hydroxypentanoic acid, and 4-hydroxyhexanoic acid.

[0043] The polyhydroxyalkanoate polymer may be a homopolymer of a hydroxyalkanoic acid, or a polymer of two or more kinds of hydroxyalkanoic acids.

[0044] <Poly(3-hydroxyalkanoate) polymer> The aliphatic polyester polymer B-1 can be a poly(3-hydroxyalkanoate) polymer.

[0045] The poly(3-hydroxyalkanoate) polymer is a polyhydroxyalkanoate, i.e., a polycondensate (polyester) of hydroxyalkanoic acid, and necessarily contains a repeating unit of 3-hydroxyalkanoate represented by formula (1). In formula (1), R is a hydrogen atom, a halogen atom, an alkyl group having 1 to 15 carbon atoms, a cyano group, an amino group having 1 to 11 carbon atoms, an alkoxy group (alkyloxy group) having 1 to 11 carbon atoms, an amide group having 2 to 20 carbon atoms, an aryl group having 6 to 12 carbon atoms, or a monovalent heterocyclic group having 1 to 9 carbon atoms. These groups may have a substituent. In particular, from the viewpoint of compatibility with components other than the polymer B contained in the composition (for example, the olefin polymer A), R is preferably an alkyl group having 1 to 8 carbon atoms, an amide group having 1 to 20 carbon atoms, or an aryl group having 6 to 8 carbon atoms.

[0046] [-O-CHR-CH 2 -CO-]…(1)

[0047] Examples of halogen atoms are F, Cl, Br, and I.

[0048] The alkyl group having 1 to 15 carbon atoms may be linear or branched. The number of carbon atoms in the alkyl group is preferably 1 to 8, and more preferably 1 to 4. Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, an isopentyl group, a 2-methylbutyl group, a 1-methylbutyl group, a hexyl group, an isohexyl group, a 3-methylpentyl group, a 2-methylpentyl group, a 1-methylpentyl group, a heptyl group, an octyl group, an isooctyl group, a 2-ethylhexyl group, a 3,7-dimethyloctyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tetradecyl group, and a pentadecyl group.

[0049] Examples of the amino group having 1 to 18 carbon atoms include an amino group, an alkylamino group, a dialkylamino group, an arylamino group, an alkylarylamino group, a benzylamino group, and a dibenzylamino group.

[0050] Examples of the alkylamino group include a methylamino group, an ethylamino group, a propylamino group, a butylamino group, a pentylamino group, a hexylamino group, a heptylamino group, an octylamino group, a nonylamino group, a decylamino group, a dodecylamino group, an isopropylamino group, an isobutylamino group, an isopentylamino group, a sec-butylamino group, a tert-butylamino group, a sec-pentylamino group, a tert-pentylamino group, a tert-octylamino group, a neopentylamino group, a cyclopropylamino group, a cyclobutylamino group, a cyclopentylamino group, a cyclohexylamino group, a cycloheptylamino group, a cyclooctylamino group, a 1-adamantamino group, and a 2-adamantamino group.

[0051] Examples of dialkylamino groups include a dimethylamino group, a diethylamino group, a dipropylamino group, a dibutylamino group, a dipentylamino group, a diisopropylamino group, a diisobutylamino group, a diisopentylamino group, a methylethylamino group, a methylpropylamino group, a methylbutylamino group, a methylisobutylamino group, a dicyclopropylamino group, a pyrrolidino group, a piperidino group, and a piperazino group.

[0052] Examples of the arylamino group include an anilino group, a 1-naphthylamino group, a 2-naphthylamino group, an o-toluidino group, a m-toluidino group, a p-toluidino group, a 1-fluoreneamino group, a 2-fluoreneamino group, a 2-thiazoleamino group, and a p-terphenylamino group.

[0053] The alkylarylamino group includes an N-methylanilino group, an N-ethylanilino group, an N-propylanilino group, an N-butylanilino group, an N-isopropylanilino group, and an N-pentylanilino group.

[0054] Examples of the alkoxy group having 1 to 11 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, a butoxy group, an isobutoxy group, a sec-butoxy group, a tert-butoxy group, a cyclopropoxy group, a cyclobutoxy group, and a cyclopentoxy group.

[0055] The term "amide group" refers to a group in which one hydrogen atom bonded to a nitrogen atom has been removed from a carboxylic acid amide. Examples of the amide group having 1 to 20 carbon atoms include -NH-C(=O)-R groups such as formamide, acetamide, propionamide, butylamide, benzamide, trifluoroacetamide, and pentafluorobenzamide. A (wherein R A is a hydrogen atom or a monovalent organic group), and -N(-C(=O)-R such as a diformamide group, a diacetamide group, a dipropionamide group, a dibutyroamide group, a dibenzamide group, a ditrifluoroacetamide group, and a dipentafluorobenzamide group. A )(-C(=O)-R B ) (wherein R A 、 R B are each independently a hydrogen atom or a monovalent organic group. The organic group may be an alkyl group, an alkoxy group, or an aryl group, which may be substituted with a halogen atom. Among these, the amide group is preferably a formamide group, an acetamide group, a propionamide group, a butyroamide group, or a benzamide group.

[0056] Examples of the aryl group having 6 to 12 carbon atoms are a phenyl group, a tolyl group, a xylyl group, a naphthyl group, and a biphenyl group, and among these, a phenyl group, a tolyl group, and a xylyl group are more preferred.

[0057] Examples of heteroatoms in the monovalent heterocyclic group having 1 to 9 carbon atoms are N, O, and S, and the group may be saturated or unsaturated, may have a single or multiple heteroatoms, or may have different types of heteroatoms. Examples of such heterocyclic groups include a thienyl group, a pyrrolyl group, a furyl group, a pyridyl group, a piperidinyl group, a quinolinyl group, an isoquinolinyl group, a pyrimidinyl group, a triazinyl group, and a thiazolyl group.

[0058] The repeating units of the aliphatic polyester polymer B-1 may consist only of one or more types of 3-hydroxyalkanoates represented by formula (1), or may have one or more types of 3-hydroxyalkanoates represented by formula (1) and one or more types of other hydroxyalkanoates.

[0059] The aliphatic polyester polymer B-1 preferably contains 50 mol % or more, more preferably 70 mol % or more, of 3-hydroxyalkanoate repeating units represented by formula (1) relative to the total repeating units of hydroxyalkanoate (100 mol %).

[0060] Examples of 3-hydroxyalkanoates represented by formula (1) are those in which R is a hydrogen atom or C n H 2n+1 where n is an integer of 1 to 15, examples of the alkyl group include 3-hydroxybutyrate (hereinafter, may be referred to as 3HB) where n=1, 3-hydroxyvalerate (hereinafter, may be referred to as 3HV) where n=2, 3-hydroxyhexanoate (hereinafter, may be referred to as 3HH) where n=3, 3-hydroxyoctanate where n=5, 3-hydroxyoctadecanate where n=15, and 3-hydroxypropionate where R is a hydrogen atom.

[0061] An example of the polymer B having only one type of repeating unit represented by formula (1) is poly(3-hydroxybutyrate) (hereinafter, sometimes referred to as P3HB).

[0062] Examples of polymer B having only multiple types of repeating units represented by formula (1) are poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (hereinafter, sometimes referred to as P3HB3HH), poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (hereinafter, sometimes referred to as P3HB3HV), and poly(3-hydroxybutyrate-co-3-hydroxypropionate) (hereinafter, sometimes referred to as P3HB3HP).

[0063] Examples of hydroxyalkanoates other than the 3-hydroxyalkanoate represented by formula (1) include the repeating unit represented by formula (2) (wherein R 1 is a hydrogen atom or C n H 2n+1 where n is an integer of 1 or more and 15 or less, and m is an integer of 2 to 10.

[0064] [-O-CHR 1 -C m H 2m+1 -CO-]…(2)

[0065] An example of the aliphatic polyester polymer B-1 containing the repeating units of the formulae (1) and (2) is poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (for example, the following formula (P3HB4HB)).

[0066] From the viewpoint of increasing the melting point, it is preferable that the repeating unit of the aliphatic polyester polymer B-1 contains at least 3-hydroxybutyrate among the 3-hydroxyalkanoates represented by the formula (1).

[0067] The aliphatic polyester polymer B-1 preferably contains 3-hydroxybutyrate repeating units in an amount of 50 mol % or more, more preferably 70 mol % or more, based on the total repeating units of hydroxyalkanoate (100 mol %).

[0068] The aliphatic polyester polymer B-1 may have two or more types of ester repeating units, and may be, for example, a di-polymer having two types of repeating units, a tri-copolymer having three types of repeating units, or a tetra-copolymer having four types of repeating units, as described above.

[0069] For example, an example of a tri-copolymer is poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxyhexanoate) (hereinafter, sometimes referred to as (P3HB3HV3HH)).

[0070] As described above, the aliphatic polyester polymer B-1 preferably contains 3-hydroxybutyrate among the repeating units of 3-hydroxyalkanoate represented by formula (1). The ratio XX of the repeating units of 3-hydroxybutyrate to 100 moles of all the repeating units of hydroxyalkanoate ester is preferably 90 mol% or more, more preferably 95 mol% or more, and even more preferably 98.0 mol% or more.

[0071] The proportion XX is usually 100 mol % or less, preferably 99.9 mol % or less, and more preferably 99.8 mol % or less.

[0072] The arrangement of the copolymer may be any of a random copolymer, an alternating copolymer, a block copolymer, a graft copolymer, and the like.

[0073] The aliphatic polyester polymer B-1 may have other ester repeating units than those of the formula (1) and the formula (2), but the main chain of the other ester repeating units does not contain an aromatic hydrocarbon structure. That is, the aliphatic polyester polymer B-1 is an aliphatic polyester. However, it is possible that a group having an aromatic hydrocarbon group is bonded to a carbon of the main chain of the other ester repeating units.

[0074] The composition ratio of the repeating units in the aliphatic polyester polymer B-1 can be calculated from the results of NMR measurements such as 1H-NMR and 13C-NMR, as described in L. Tripathi., MCFactories, 11, 44 (2012).

[0075] The aliphatic polyester polymer B-1 may also be a mixture of two or more kinds of poly(3-hydroxyalkanoate) polymers.

[0076] The weight average molecular weight (Mw) of the aliphatic polyester polymer B-1 can be 10,000 to 1,000,000, preferably 20,000 to 800,000, and more preferably 30,000 to 600,000. By making the weight average molecular weight (Mw) 10,000 or more, it is possible to obtain a molded product excellent in impact strength and tensile elongation. In addition, by making the weight average molecular weight 500,000 or less, the dispersibility in the olefin polymer A becomes good. The weight average molecular weight may be 400,000 or less, 300,000 or less, 200,000 or less, or 100,000 or less. In this specification, the weight average molecular weight (Mw) is measured by GPC using standard polystyrene as a molecular weight standard substance.

[0077] The aliphatic polyester polymer B-1 is a thermoplastic resin, and is preferably crystalline.

[0078] According to JIS K7210-2014, the melt mass flow rate (MFR(B-1)) of the aliphatic polyester polymer B-1 measured under conditions of a temperature of 190°C or 170°C and a load of 2.16 kgf is preferably 0.1 g / 10 min or more and 200 g / 10 min or less. MFR(B-1) may be 1 g / 10 min or more, 3 g / 10 min or more, 5 g / 10 min or more, 7 g / 10 min or more, 8 g / 10 min or more, 10 g / 10 min or more, or 20 g / 10 min or more. MFR(B-1) may be 150 g / 10 min or less, or 100 g / 10 min or less.

[0079] The melting point (Tm) of the aliphatic polyester polymer B-1 is preferably 150° C. or higher, and may be 155° C. or higher, 160° C. or higher, 165° C. or higher, 170° C. or higher, or 175° C. or higher. The melting point (Tm) of the polymer B may be 220° C. or lower, may be 200° C. or lower, or may be 190° C. or lower.

[0080] The melting point (Tm) of the aliphatic polyester polymer B-1 is measured from the position of the main peak due to the melting of crystals as determined by differential scanning calorimetry (DSC) in accordance with JIS K7121.

[0081] Poly(3-hydroxyalkanoate) polymers may be produced by microorganisms or may be derived from compounds (eg, cyclic lactones) derived from petroleum or plant sources.

[0082] The poly(3-hydroxyalkanoate) polymer may be one in which each repeating unit of hydroxyalkanoate is composed only of the D-form (R-form), such as in one produced from a microorganism, or may be one in which the repeating unit of hydroxyalkanoate contains both the D-form (R-form) and the L-form (S-form), such as in one derived from a mixture of the D-form (R-form) and the L-form (S-form).

[0083] In the poly(3-hydroxyalkanoate) polymer produced from a microorganism, the repeating unit of formula (1) can be expressed as follows: (BI-1) In formula (BI-1), n ​​represents the degree of polymerization. [ka]

[0084] For example, poly-(3-hydroxybutyrate) produced from a microorganism has the following structure: (BI-2) where n represents the degree of polymerization. [ka]

[0085] Also, poly-(3-hydroxybutyrate-co-3-hydroxyhexanoate) produced from a microorganism has the following structure: (BI-3) where m and n represent the degree of polymerization. [ka]

[0086] Furthermore, poly-(3-hydroxybutyrate-co-4-hydroxybutyrate) produced from microorganisms has the following structure: (BI-4) where m and n represent the degree of polymerization. [ka]

[0087] The aliphatic polyester polymer B-1 can be biodegradable.

[0088] For example, poly(3-hydroxyalkanoate) polymers can be produced by microorganisms such as Alcaligeneseutrophus AC32 strain, which is an Alcaligeneseutrophus strain into which a PHA synthase gene derived from Aeromonas caviae has been introduced (international deposit under the Budapest Treaty, international depository authority: National Institute of Advanced Industrial Science and Technology Patent Organism Depositary Center (6-1-1 Central, Higashi 1-chome, Tsukuba City, Ibaraki Prefecture, Japan), original deposit date: August 12, 1996, transferred on August 7, 1997, accession number FERMBP-6038 (transferred from original deposit FERMP-15786)) (J. Bacteriol., 179, 4821 (1997)).

[0089] <Aromatic polyester polymer B-2> The aromatic polyester polymer B-2 of this embodiment is an aromatic polyester having a heat of fusion in the range of 0 to 25 J / g as measured by differential scanning calorimetry. The aromatic polyester is a polymer having an aromatic hydrocarbon structure (aromatic ring) and an ester bond in the main chain.

[0090] The aromatic polyester polymer B-2 can be a polycondensation product of polycarboxylic acid and polyol (polyhydroxy compound). Polycarboxylic acid refers to an organic compound having multiple carboxyl groups or its derivatives (e.g., acid anhydride, ester). Polyol (polyhydroxy compound) refers to an organic compound having multiple hydroxyl groups.

[0091] In the aromatic polyester polymer B-2, the main chain of the structural unit derived from a polycarboxylic acid may have an aromatic ring, the main chain of the structural unit derived from a polyol may have an aromatic ring, or both the main chains of the structural unit derived from a polycarboxylic acid and the structural unit derived from a polyol may have an aromatic ring.

[0092] From the viewpoint of lowering the melting point, it is preferable that the structural unit derived from the polycarboxylic acid has an aromatic ring in the main chain, and the structural unit derived from the polyol does not have an aromatic ring in the main chain. It is more preferable that the structural unit derived from the polyol is aliphatic. The aliphatic includes those containing an oxygen atom.

[0093] Examples of polycarboxylic acids in which the main chain of the structural unit derived from a polycarboxylic acid has an aromatic ring include terephthalic acid, isophthalic acid, orthophthalic acid, 2,6-naphthalenedicarboxylic acid, diphenyl ether 4,4'-dicarboxylic acid, trimellitic acid, trimellitic acid, and derivatives thereof. The polycarboxylic acid may contain one type of polycarboxylic acid or may contain multiple types of polycarboxylic acids.

[0094] The polycarboxylic acid preferably contains terephthalic acid. The ratio of the number of moles of structural units derived from polycarboxylic acids other than terephthalic acid to the number of moles of structural units derived from all acid components can be 10 mol% or less, 5 mol% or less, 1 mol% or less, or 0.5 mol% or less.

[0095] When the polycarboxylic acid contains terephthalic acid, the polycarboxylic acid may contain other polycarboxylic acid components in addition to terephthalic acid.

[0096] Examples of the other polycarboxylic acid components are the above-mentioned aromatic polycarboxylic acids other than terephthalic acid, and aliphatic polycarboxylic acids such as adipic acid, sebacic acid, succinic acid, dimer acid, 1,4-cyclohexadicarboxylic acid, and derivatives thereof.

[0097] Examples of polyols in which the polyol-derived structural unit is aliphatic include aliphatic polyols such as ethylene glycol, 2,2-dimethyl-1,3-propanediol (neopentyl glycol), 1,3-propanediol, 2-methyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propanediol, 1,2-propanediol, 1,4-butanediol, 1,3-butanediol, diethylene glycol, 1,4-cyclohexanediol, and 1,4-cyclohexanedimethanol.

[0098] The polyols may be added singly or in any combination of two or more kinds in any ratio.

[0099] In the aromatic polyester, when the structural unit derived from a polycarboxylic acid has an aromatic ring in the main chain and the structural unit derived from a polyhydroxy compound also has an aromatic ring in the main chain, examples of the polyhydroxy compound having an aromatic ring in the main chain are hydroquinone, 4,4'-dihydroxybiphenyl, and bisphenol A.

[0100] The aromatic polyester polymer B-2 may also be a polycondensate of a monomer that does not contain a polycarboxylic acid. For example, the aromatic polyester polymer B-2 may be a polycondensate of an aromatic hydroxycarboxylic acid in which two H of an aromatic ring are substituted with a hydroxy group and a carboxyl group. Examples of aromatic hydroxycarboxylic acids include parahydroxybenzoic acid and 6-hydroxy-2-naphthalenecarboxylic acid.

[0101] The aromatic polyester polymer B-2 may be a polycondensate of a mixture of an aromatic hydroxycarboxylic acid and at least one of a polyol and a polycarboxylic acid, in which case the polyol and the polycarboxylic acid may each independently be aliphatic or aromatic having an aromatic ring in the main chain.

[0102] The aromatic polyester polymer B-2 has a heat of fusion obtained by differential scanning calorimetry in the range of 0 to 25 J / g. Differential scanning calorimetry can be performed according to JIS K 7122-1987. The heating rate is 10°C / min. The heat of fusion can be calculated from the area of ​​the melting peak in the DSC curve during the heating process of the aromatic polyester polymer B-2. When no melting peak is observed, the heat of fusion is 0. In the aromatic polyester polymer B-2 having such a small heat of fusion, a clear melting point is often not observed in DSC. Such an aromatic polyester polymer B-2 is sometimes called an amorphous aromatic polyester polymer, can be obtained by quenching an aromatic polyester, and is also commercially available.

[0103] The melt mass flow rate (MFR(B-2)) of the polymer B-2 measured according to JIS K7210-2014 under conditions of a temperature of 230°C and a load of 2.16 kgf is preferably 0.1 g / 10 min or more and 200 g / 10 min or less. MFR(B-2) may be 1 g / 10 min or more, 3 g / 10 min or more, 5 g / 10 min or more, 7 g / 10 min or more, 8 g / 10 min or more, or more. MFR(B-2) may be 150 g / 10 min or more, 100 g / 10 min or more, or 70 g / 10 min or less.

[0104] <Composition of Resin Composition> The resin composition contains 64 to 95 parts by mass of the olefin polymer A, 1 to 15 parts by mass of the aliphatic polyester polymer B-1, and 1 to 35 parts by mass of the aromatic polyester polymer B-2, relative to 100 parts by mass of the total of the olefin polymer A, the aliphatic polyester polymer B-1, and the aromatic polyester polymer B-2. The resin composition can contain 79 to 90 parts by mass of the olefin polymer A, 1 to 15 parts by mass of the aliphatic polyester polymer B-1, and 1 to 20 parts by mass of the aromatic polyester polymer B-2, relative to 100 parts by mass of the total of the olefin polymer A, the aliphatic polyester polymer B-1, and the aromatic polyester polymer B-2. The aromatic polyester polymer B-2 may be 2 parts by mass or more, 4 parts by mass or more, 18 parts by mass or less, or 16 parts by mass or less.

[0105] The total proportion of the olefin polymer A, the aliphatic polyester polymer B-1, and the aromatic polyester polymer B-2 in the entire resin composition can be 50 mass% or more, optionally 60 mass% or more, optionally 70 mass% or more, optionally 80 mass% or more, or optionally 90 mass% or more.

[0106] The aliphatic polyester polymer B-1 may form a dispersed phase in the olefin polymer A. The aromatic polyester polymer B-2 may form a dispersed phase in the olefin polymer A. The polymer B-1 forms a dispersed phase, which means that the resin composition has a sea-island structure in which the olefin polymer A is a continuous phase (sea portion) and the polymer B-1 is a dispersed phase (island portion). The polymer B-2 forms a dispersed phase, which means that the resin composition has a sea-island structure in which the olefin polymer A is a continuous phase (sea portion) and the polymer B-2 is a dispersed phase (island portion). The dispersed phase of the polymer B-1 and the dispersed phase of the polymer B-2 can be dispersed independently of each other in the continuous layer. The average equivalent circle diameter of the dispersed phase (island portion) can be 10 nm to 400 μm.

[0107] The resin composition may contain other components, such as compound C and additives.

[0108] (Compound C) Compound C has a heterocyclic group having two or more heteroatoms in the molecule.

[0109] Compound C may be a low molecular weight compound, but is preferably a polymer having a weight average molecular weight Mw of 5000 or more. When compound C is a polymer, the functional group may be in the main chain, side chain, or terminal, but is preferably in the side chain. The polymer may be a block, graft, or random copolymer.

[0110] Compound C may have a functional group other than the above-mentioned functional groups. Compound C may be a mixture of two or more compounds.

[0111] (Compound C having a heterocyclic group having two or more heteroatoms) Examples of heteroatoms are N, O, S, and P. The heterocyclic group may be saturated or unsaturated, but is preferably unsaturated. The total number of carbon atoms and heteroatoms constituting the ring may be 3 to 9.

[0112] The heterocyclic group preferably has two or more types of heteroatoms. An example of a combination of two types is a combination of O and N.

[0113] The heterocyclic group is preferably an oxazolyl group. In particular, a 2-oxazolyl group is preferred. The 2-oxazolyl group is represented by the following formula: R 1 ~R 4 are each independently a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, preferably 1 to 10. * represents a bond, and when compound C is a polymer, an oxazolyl group may be bonded directly or via another functional group to a carbon atom constituting the main chain. Examples of the other functional group include an alkyl group having 1 to 12 carbon atoms, an alkyl group having 1 to 12 carbon atoms and containing an oxygen atom, and an alkyl group having 1 to 12 carbon atoms and containing a sulfur atom.

[0114] [ka]

[0115] Compound C may be a homopolymer of an oxazolyl group-containing monomer, or a copolymer of an oxazolyl group-containing monomer and a non-oxazolyl group-containing monomer.

[0116] Examples of the oxazolyl group-containing monomer include vinyloxazolines {e.g., vinyloxazoline (2-vinyl-2-oxazoline, etc.), vinyloxazolines having a substituent [e.g., alkyl-vinyloxazolines (e.g., 2-vinyl-4-methyl-2-oxazoline, 2-vinyl-4,4-dimethyl-2-oxazoline, 2-vinyl-4-ethyl-2-oxazoline, 2-vinyl-4-propyl-2-oxazoline, 2-vinyl-4-butyl-2-oxazoline, C1-20 alkyl-vinyloxazoline such as 2-vinyl-5-methyl-2-oxazoline, 2-vinyl-5-ethyl-2-oxazoline, 2-vinyl-5-propyl-2-oxazoline, 2-vinyl-5-butyl-2-oxazoline, preferably C1-10 alkyl-vinyloxazoline, more preferably mono- or di-C1-4 alkyl-vinyloxazoline); and the like}; isopropenyloxazolines {for example, isopropenyloxazoline (2-isopropenyloxazoline, isopropenyl-2-oxazoline, etc.), isopropenyl oxazoline having a substituent [e.g., alkyl-isopropenyl oxazoline (e.g., 2-isopropenyl-4-methyl-2-oxazoline, 2-isopropenyl-4,4-dimethyl-2-oxazoline, 2-isopropenyl-4-ethyl-2-oxazoline, 2-isopropenyl-4-propyl-2-oxazoline, 2-isopropenyl-4-butyl-2-oxazoline, 2-isopropenyl-5-methyl- C1-20 alkyl-isopropenyloxazolines such as 2-oxazoline, 2-isopropenyl-5-ethyl-2-oxazoline, 2-isopropenyl-5-propyl-2-oxazoline, and 2-isopropenyl-5-butyl-2-oxazoline, preferably C1-10 alkyl-isopropenyloxazoline, and more preferably mono- or di-C1-4 alkyl-isopropenyloxazoline); and the like}; and the corresponding allyloxazolines.

[0117] Among these, isopropenyloxazolines are preferred, and 2-isopropenyl-2-oxazoline is particularly preferred. In this case, compound C has a 4,5-dihydro-2-(1-methylethylene)-oxazolyl structural unit.

[0118] The oxazolyl group-containing monomers may be used alone or in combination of two or more kinds.

[0119] The proportion of structural units based on an oxazolyl group-containing monomer in compound C is not particularly limited, and may be, for example, 1 mass % or more (e.g., 5 mass % or more), preferably 10 mass % or more, and more preferably 15 mass % or more, based on the entire compound C.

[0120] In particular, the ratio of structural units based on oxazolyl group-containing monomers to the entire compound C may be 20% by mass or more, preferably 30% by mass or more, more preferably 40% by mass or more (e.g., 45% by mass or more), and can also be 50% by mass or more (e.g., 60% by mass or more, preferably 70% by mass or more).

[0121] Examples of the non-oxazolyl group-containing monomer can be appropriately selected depending on the application of the oxazolyl-containing polymer, and are not particularly limited. Examples of the non-oxazolyl group-containing monomer include styrene monomers or aromatic vinyl monomers, such as styrene, α-alkylstyrenes (e.g., α-C1-4 alkylstyrenes such as α-methylstyrene), alkylstyrenes (e.g., C1-4 alkylstyrenes such as vinyltoluene), halostyrenes (e.g., chlorostyrene), etc.); vinyl esters (e.g., vinyl acetate, vinyl propionate, etc.); unsaturated nitriles (e.g., acrylonitrile, methacrylonitrile, etc.); vinyl esters (e.g., vinyl acetate, vinyl propionate, etc.); vinyl esters (e.g., vinyl acetate, vinyl propionate, etc.); vinyl esters (e.g., vinyl acetate, vinyl methacrylonitrile ... vinyl ethers (e.g., alkyl vinyl ethers such as methyl vinyl ether and ethyl vinyl ether); amide group-containing monomers (e.g., (meth)acrylamide, N-substituted (meth)acrylamides (e.g., N-alkyl (meth)acrylamides such as N-methyl (meth)acrylamide); olefin monomers (e.g., alkenes (e.g., C2-10 alkenes such as ethylene, propylene, 1-butene, isobutylene, and 1-octene); halogen-containing monomers (e.g., halo C2-10 alkenes such as vinyl chloride, vinylidene chloride, and vinyl fluoride);(Meth)acrylic monomers {for example, (meth)acrylic acid, (meth)acrylic acid alkyl esters [for example, C1-20 alkyl (meth)acrylates such as methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, sec-butyl (meth)acrylate, tert-butyl (meth)acrylate, pentyl (meth)acrylate, n-hexyl (meth)acrylate, and 2-ethylhexyl (meth)acrylate], (meth)acrylic acid cycloalkyl [for example, C3-20 cycloalkyl (meth)acrylates such as cyclohexyl (meth)acrylate], (meth)acrylic acid aryl [for example, (meth)acrylic acid ) phenyl acrylate, etc.], aralkyl (meth)acrylate [for example, C6-10 aryl C1-4 alkyl (meth)acrylate such as benzyl (meth)acrylate], (meth)acrylic acid esters having a hydroxyl group [for example, hydroxyalkyl (meth)acrylates (for example, hydroxy C2-10 alkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, etc.)], (meth)acrylic acid esters having an alkoxy group [for example, alkoxyalkyl (meth)acrylates (for example, C1-10 alkoxy C2-10 alkyl (meth)acrylates such as 2-methoxyethyl (meth)acrylate, etc.)], glycidyl (meth)acrylate, etc.} and the like.;

[0122] The non-oxazolyl group-containing monomers may be used alone or in combination of two or more kinds.

[0123] Of these non-oxazolyl group-containing monomers, styrene-based monomers may be particularly preferably used.

[0124] When the oxazolyl group-free monomer contains a styrene-based monomer, the ratio of the structural units derived from the styrene-based monomer to the structural units derived from the oxazolyl group-free monomer may be, for example, 5 mass% or more (e.g., 10 mass% or more), preferably 20 mass% or more (e.g., 30 mass% or more), more preferably 40 mass% or more (e.g., 50 mass% or more), particularly preferably 60 mass% or more (e.g., 70 mass% or more), or may be 80 mass% or more (e.g., 90 mass% or more).

[0125] When a non-oxazolyl group-containing monomer is used, the ratio of the structural units derived from the oxazolyl group-containing monomer to the structural units derived from the non-oxazolyl group-containing monomer may be, for example, the former / latter (mass ratio)=99 / 1 to 5 / 95 (e.g., 98 / 2 to 10 / 90), preferably 97 / 3 to 12 / 88 (e.g., 96 / 4 to 15 / 85), more preferably about 95 / 5 to 18 / 82 (e.g., 93 / 7 to 20 / 80), and usually 99 / 1 to 25 / 75 (e.g., 98 / 2 to 30 / 70, preferably 95 / 5 to 40 / 60, more preferably 90 / 10 to 45 / 55).

[0126] The compound containing an oxazolyl group may be a low molecular weight compound instead of a high molecular weight compound. Examples of low molecular weight compounds include, as structural units, 2,2'-o-phenylenebis(2-oxazoline), 2,2'-m-phenylenebis(2-oxazoline), 2,2'-p-phenylenebis(2-oxazoline), 2,2'-p-phenylenebis(4-methyl-2-oxazoline), 2,2'-m-phenylenebis(4-methyl-2-oxazoline), 2,2'-p-phenylenebis(4,4'-dimethyl-2-oxazoline), 2,2'-m-phenylenebis(4 ,4'-dimethyl-2-oxazoline), 2,2'-ethylenebis(2-oxazoline), 2,2'-tetramethylenebis(2-oxazoline), 2,2'-hexamethylenebis(2-oxazoline), 2,2'-octamethylenebis(2-oxazoline), 2,2'-ethylenebis(4-methyl-2-oxazoline), or 2,2'-diphenylenebis(2-oxazoline), each of which has a divalent group obtained by removing two hydrogen atoms.

[0127] The proportion of compound C in the entire resin composition may be 0.01 mass% or more, 0.1 mass% or more, or 0.5 mass% or more, and may be less than 50 mass%, 30 mass% or less, 20 mass% or less, 10 mass% or less, or 5 mass% or less.

[0128] (Additives) The resin composition may contain additives as necessary, which may be at least one selected from the group consisting of stabilizers, antibacterial agents, antifungal agents, dispersants, plasticizers, flame retardants, tackifiers, colorants, metal powders, organic powders, inorganic fibers, organic fibers, organic and inorganic composite fibers, inorganic whiskers, and fillers.

[0129] Examples of the stabilizer include at least one selected from the group consisting of lubricants, antioxidants, heat stabilizers, light resistance agents, weather resistance agents, metal deactivators, ultraviolet absorbers, light stabilizers, and copper damage inhibitors. Examples of the light resistance agent include hindered amine-based light resistance agents.

[0130] An example of the colorant is at least one selected from the group consisting of a dye such as an organic dye, titanium oxide, carbon black, and an organic pigment.An example of the metal powder is ferrite.

[0131] An example of an organic powder is a protein. Examples of inorganic fibers are glass fibers and metal fibers. Examples of organic fibers are carbon fibers and aramid fibers. An example of an inorganic whisker is potassium titanate whisker.

[0132] Examples of the filler include at least one selected from the group consisting of glass beads, glass balloons, glass flakes, asbestos, mica, calcium carbonate, talc, silica, calcium silicate, hydrotalcite, kaolin, diatomaceous earth, graphite, pumice, ebonized powder, cotton flock, cork powder, barium sulfate, fluororesin, cellulose powder, and wood flour.

[0133] The resin composition may contain only one of the additives or a combination of two or more of them. The proportion of the additive in the entire resin composition may be 0.01% by mass or more, 0.1% by mass or more, or 0.5% by mass or more, less than 50% by mass, 30% by mass or less, 20% by mass or less, 10% by mass or less, or 5% by mass or less.

[0134] In the resin composition, the additive may be contained in any of the phases of the polymer A, B-1, and B-2. The additive may form a dispersed phase in the continuous phase of the olefin polymer A, separate from the polymers B-1 and B-2.

[0135] (Method of producing resin composition) The resin composition can be obtained by melt-kneading the olefin polymer A, the aliphatic polyester polymer B-1, the aromatic polyester polymer B-2, and additives added as necessary. The kneading temperature (the set temperature of the kneader) is preferably 150 to 300° C., more preferably 170 to 280° C. Alternatively, a resin composition such as pellets can be obtained by melt-kneading a part of each of the olefin polymer A and the polymers B-1 and B-2 to obtain a pre-kneaded product, and then adding the remaining olefin polymer A and the polymers B-1 and B-2 to the pre-kneaded product and further melt-kneading the mixture. When an aliphatic polyester polymer B-1 having a heat of fusion in the range of 0 to 25 J / g is melt-kneaded as a raw material, in the resin composition such as pellets obtained, the heat of fusion of the aliphatic polyester polymer B-1 dispersed in the olefin polymer A phase is likely to be maintained at a low value in the range of 0 to 25 J / g. In addition, even when a resin composition containing the aliphatic polyester polymer B-1 having a heat of fusion in the range of 0 to 25 J / g as a dispersed phase is molded, the heat of fusion of the aliphatic polyester polymer B-1 forming the dispersed phase is likely to be maintained in the range of 0 to 25 J / g.

[0136] Specifically, the resin composition may be in the form of pellets. An example of a method for producing pellets includes a step of extruding the resin composition obtained by melt kneading through a die to obtain a strand, and a step of cutting the strand while cooling or after solidifying the strand.

[0137] To solidify the strands, the strands may be contacted with water, or the strands may be contacted with a gas such as air on a belt or the like.

[0138] The die, cooling device, and cutting device may be any known device.

[0139] (Method for producing molded article of resin composition) Using the above-mentioned resin composition such as pellets as a raw material, a molded body of the above-mentioned resin composition having a required shape can be obtained using a known resin molding method such as injection molding, extrusion molding, spinning molding, vacuum molding, pressure molding, press molding, foam molding, blow molding, and rotational molding. The shape of the molded body is not limited, and may be, for example, a film, a sheet, a plate, or a fiber. The molded body can have the same composition as the above-mentioned resin composition. That is, the molded body includes an olefin-based polymer A, a polymer B-1, and a polymer B-2, the polymer B-1 is an aliphatic polyester-based polymer, the polymer B-2 is an aromatic polyester-based polymer having a heat of fusion obtained by differential scanning calorimetry in the range of 0 to 25 J / g, and the content of the polymer A is 64 to 95 parts by mass, the content of the polymer B-1 is 1 to 15 parts by mass, and the content of the polymer B-2 is 1 to 35 parts by mass relative to 100 parts by mass of the total of the polymer A, the polymer B-1, and the polymer B-2. The details and more preferred concentrations of each component are as described above.

[0140] Moreover, the above resin composition can be laminated with other materials such as other resins, fibers, metals, paper, leather, etc. to obtain a multi-layer structure.

[0141] The surface of the molded article of the resin composition of the present invention may be subjected to a surface treatment such as embossing, corona discharge treatment, flame treatment, plasma treatment, ozone treatment, etc.

[0142] The above resin composition can be widely used as a resin material. The resin composition and its molded product have excellent dyeability because they contain a predetermined amount of aromatic polyester polymer B-2, the heat of fusion of which is within the range of 0 to 25 J / g as measured by differential scanning calorimetry, in addition to aliphatic polyester polymer B-1. The reason for this is unclear, but it is thought that, for example, disperse dyes are easily impregnated into the resin composition.

[0143] (Surface condition of resin composition and molded article) The above-mentioned resin composition and molded article thereof can satisfy the following requirement (i).

[0144] (i): The oxygen atomic amount on the surface of the resin composition molded product determined by X-ray photoelectron spectroscopy is 0.01 atom% or more and 20.0 atom% or less. The oxygen atomic amount may be 0.05 atom% or more, 0.10 atom% or more, or 0.20 atom% or more. The oxygen atomic amount may be 18.0 atom% or less, 15.0 atom% or less, 3 atom% or less, 2.0 atom% or less, or 1.0 atom% or less.

[0145] When the requirement (i) is satisfied, the amount of oxygen atoms on the surface is appropriate, and therefore dyeability with disperse dyes can be improved.

[0146] (iii): In the infrared absorption spectrum of the surface of the molded product of the resin composition measured by an infrared spectrophotometer, the ratio RCO / RCH of the peak intensity RCO of the stretching vibration of the C=O bond to the peak intensity RCH of the stretching vibration of the CH bond is 0.05 or more. This ratio RCO / RCH may be 0.07 or more, 0.10 or more, or 0.12 or more. There is no particular upper limit to this ratio RCO / RCH, but it may be 1.0 or less, 0.8 or less, or 0.5 or less.

[0147] Peak intensity RCO is 1600-1800cm -1 In the IR absorption spectrum of the surface of the resin composition molded product, which is base-corrected in the range of 1600 to 1800 cm -1 This is the maximum absorbance of the peak observed at 100 nm, which corresponds to the carbonyl C=O stretching vibration intensity.

[0148] The peak intensity RCH is 2700-3000 cm -1 In the IR absorption spectrum of the surface of the resin composition molded product, which is base-corrected in the range of 2700 to 3000 cm -1 This is the maximum absorbance of the peak observed at 100 nm, and corresponds to the CH stretching vibration peak intensity of alkanes.

[0149] The IR spectrum of the surface of the resin composition molded article can be obtained by the attenuated total reflection (ATR) method using an FTIR device.

[0150] An RCO / RCH ratio of 0.05 or more means that a certain amount of C=O bonds are present on the surface of the resin composition molded product. It is believed that the C=O bonds contribute more to adhesion to the resin film than the OH bonds, and that satisfying formula (iii) leads to further improvement in dyeability.

[0151] Applications of the resin composition of the present invention include textile materials, exterior construction materials, furniture and interior decoration materials, house materials, toy materials, gardening materials, automotive parts, and packaging materials. Examples of the textile materials include fabric materials for clothing, fabric materials for interior use, and textile materials for industrial use. Examples of the exterior materials include carport materials, fence materials, gate materials, gatepost materials, post materials, cycle port materials, deck materials, sunroom materials, roof materials, terrace materials, handrail materials, shade materials, and awning materials. Examples of the furniture and interior decoration materials include sofa materials, table materials, chair materials, bed materials, chest materials, cab net materials, and dresser materials. Examples of the home appliance materials include clock materials, mobile phone materials, and white goods home appliance materials. Examples of the toy materials include plastic model materials, diorama materials, and video game main body materials. Examples of the gardening materials include planter materials, flower vase materials, and flower pot materials. Examples of the automobile materials include bumper materials, instrument panel materials, and airbag cover materials. Examples of the packaging materials include food packaging materials, fiber packaging materials, and miscellaneous goods packaging materials. Further, other applications include, for example, monitor parts, office automation (OA) equipment parts, medical parts, drainage pans, toiletry parts, bottles, containers, snow removal equipment parts, and various construction parts. EXAMPLES

[0152] (1) Olefin Polymer A (A-1) Propylene homopolymer MFR (230℃, 2.16kg load): 7g / 10min Melting point (Tm): 163℃

[0153] (A-2) Ethylene-propylene copolymer Ethylene content: 4.6% MFR (230℃, 2.16kg load): 7g / 10min Melting point (Tm): 131℃

[0154] (A-3) Propylene homopolymer MFR (230℃, 2.16kg load): 20g / 10min Melting point (Tm): 163℃

[0155] (A-4) Propylene homopolymer MFR (230℃, 2.16kg load): 100g / 10min Melting point (Tm): 163℃

[0156] (2) Aliphatic polyester polymer B-1 (B-1-1) Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) Structural formula: (BI-3) formula Comonomer (3HH) component content (mol%): 0.2 mol% Weight average molecular weight (Mw): 104000 MFR (190℃, 2.16kg load): 7.8g / 10min Melting point (Tm): 177℃

[0157] (3) Aromatic polyester polymer B-2 (B-2-1) Aromatic polyester (Product name) Bellpet E-03: manufactured by Bell Polyester Products MFR (230℃, 2.16kg load): 8g / 10min Heat of fusion (ΔHm): 0 J / g

[0158] (B-2-2) Aromatic polyester (Product name) Bellpet PRIT30: manufactured by Bell Polyester Products MFR (230℃, 2.16kg load): 48g / 10min Melting point (Tm): 198℃ Heat of fusion (ΔHm): 42J / g

[0159] (B-2-3) Aromatic polyester (Product name) Bellpet IP252B: manufactured by Bell Polyester Products MFR (230℃, 2.16kg load): 20g / 10min Heat of fusion (ΔHm): 0 J / g

[0160] (4) Compound C (C-1) Oxazoline group-containing polystyrene (Product name) EPOCROS RPS-1005: Made by Nippon Shokubai Co., Ltd. MFR (230℃, 2.16kg load): 27.3g / 10 minutes Molecular weight (Mw): 157780 Functional group contained: Oxazoline group [ka]

[0161] The physical properties of each polymer and composition were measured according to the methods shown below.

[0162] (1) Melt mass flow rate (MFR, unit: g / 10 min) Measurements were performed according to the method specified in JIS K7210-2014. The measurement temperature was 230°C or 190°C, and the load was 2.16 kg.

[0163] (2) Weight average molecular weight (Mw) The weight average molecular weight (Mw) was calculated based on the results of gel permeation chromatography (GPC). In the GPC measurement, a Waters GPC-150C was used as the measuring device, an orthodichlorobenzene solution with a polymer concentration of 0.05% by weight was used, and a mixed polystyrene gel column (Tosoh PSKgelGMH6-HT) was used as the column, and the measurement temperature was 135°C.

[0164] (3) Content of comonomer component in polymer B-1 The content of the comonomer component refers to the molar ratio of structural units other than 3-hydroxybutyrate (3-hydroxyhexanoate (3HH) or 4-hydroxybutyrate (4HB)) to the number of all ester structural units of hydroxyalkanoate in the polymer B-1.

[0165] The content of the comonomer component was determined by the method using 1H-NMR spectrum described in L. Tripathi., MCFactories, 11, 44 (2012). [Measurement conditions] Model: Bruker AVANCE600 Probe: 10mm cryoprobe Measurement temperature: 135℃ Pulse repetition time: 1 second Pulse width: 45° Accumulation count: 700 times Magnetic field strength: 600MHz

[0166] (4) Melting point of polymer (Tm) The measurement was performed according to the method specified in JIS K7121. The measurement temperature was −50° C. to 200° C. or −50° C. to 250° C., and the temperature rise rate was 10° C. / min.

[0167] (5) Dyeing degree 3 g of a resin composition molded product sheet having a thickness of 50 μm, or 3 g of fibrous resin composition molded product fibers that have been wrapped around a wire mesh and flattened, were added to an aqueous solution of 99.8 mass % aqueous solution to which acetic acid was added so that the pH of the aqueous solution was 4 to 5, and 0.2 wt % of the disperse dye Mekicron Navy Blue SPW, and dyed at 130°C for 45 minutes using a Texam Giken mini color dyeing machine MC-12EL. The dyed resin composition molded sheet or resin composition molded fiber was mixed with an aqueous solution of 99.77% by mass of water, 0.3% by mass of sodium hydroxide (manufactured by Fuji Film Wako Pure Chemical Industries, Ltd.), 0.15% by mass of sodium dithionate, and 0.05% by mass of PEG4000 (manufactured by Fuji Film Wako Pure Chemical Industries, Ltd.), and washed at 80°C for 20 minutes. The washed resin composition molded sheet or resin composition fiber was subjected to a K / S value calculation based on the formula (X) in accordance with the method specified in JIS K0117:2000 using a color matching device Gretag Macbeth Color-i5 manufactured by X-Rite Co., Ltd. A higher K / S value indicates higher dyeability. K / S value = (1-R) 2 / 2R …(X) K: Light absorption coefficient, S: Light scattering coefficient, R: Surface reflectance

[0168] (6) Oxygen Atom Quantity on the Surface of the Resin Composition Molded Product The amount of oxygen atoms on the surface of the resin composition molded product was measured using an X-ray photoelectron spectroscopy device, AXIS ULTRA DLD, manufactured by Shimadzu Corporation / KRATOS. The degree of vacuum in the device during the measurement was 10 -8 ~10 -9 The X-ray source was set to a range of 1000 torr. The excitation light was monochromatic Al Kα (1486.6 eV), the output was 10 mA tube current, 15 kV tube voltage, and the photoelectron take-off angle was 0°. After charging correction based on the binding energy of the carbon 1s level (1486.6 eV), the spectrum background was removed by the Shirley method. Peak separation was performed on the oxygen atomic components of the obtained carbon 1s narrow spectrum using a Gauss-Lorentz composite function (Lorentz function ratio: 30%). [Measurement conditions] Equipment: X-ray photoelectron spectroscopy equipment (Shimadzu / KRATOS AXIS ULTRA DLD) Light source: Monochromatic Al Kα (1486.6eV) Tube current: 10mA Tube voltage: 15kV Vacuum degree inside the device: 10 -8 ~10 -9 toor Neutralization Gun: Use Spot size: 300μm×700μm Scan mode (elements): Narrow (C1s, O1s, P2p) Pass energy: 20 eV Step: 0.1 eV Dwell time:260ms(C1s), 332(O1s), 426(P2p) Accumulation count: 5 times (C1s), 10 times (O1s), 20 times (P2p) Charge correction: Carbon 1s level binding energy (284.6 eV) Background: Shirley Method

[0169] (7) Ratio RCO / RCH Using a JASCO FT / IR 6200 infrared spectrophotometer, infrared spectroscopy was performed on the surface of the resin composition molded body by the attenuated total reflection (ATR) method according to the measurement procedure described below, and the value was calculated from the obtained IR spectrum using the formula XXX. [Measurement conditions] Measurement mode: ATR method Prism: Diamond Measurement wavelength: 600~4000cm -1 Number of times accumulated: 64 RCO / RCH=1600~1800cm -1 In the base-corrected IR spectrum in the range of 1600-1800 cm -1 Maximum absorbance of the peak observed at (carbonyl C=O stretching vibration intensity) / 2700~3000cm -1 In the base-corrected IR spectrum in the range of 2700-3000 cm -1 Maximum absorbance of the peak observed in (peak intensity of CH stretching vibration of alkane) …XXX

[0170] (8) Density (g / cm 3 ) The density of the resin composition was determined in accordance with Method A of the methods prescribed in JIS K7112-1999. (9) Measurement of heat of fusion of polymer B-2 According to JIS K 7122-1987, a DSC curve was obtained at a heating rate of 10° C. / min using a DSCQ100 device manufactured by TA Instruments Co., Ltd. The heat of fusion was calculated from the area of ​​the melting peak. The heat of fusion of polymer B-2 was obtained by carrying out DSC measurement on polymer B-2 as a raw material before melt-kneading, pellets of the composition after melt-kneading, and a molded product (sheet or fiber) obtained from the pellets. Although the pellets and the molded product are compositions, the only component that melts at 175°C or higher is polymer B-2, so the heat of fusion of polymer B-2 in the pellets and the molded product can be obtained from the DSC curve at 175°C or higher.

[0171] Example 1 80% by mass of polymer (A-1), 4% by mass of polymer (A-2), 5.0% by mass of polymer (B-1-1), 10% by mass of polymer (B-2-1), and 1% by mass of polymer (C-1) were mixed uniformly in powder form, and then kneaded using a JSW TEX25αIII-52.5CW-4V at a resin temperature of 230°C and a discharge rate of 21 kg / h to obtain pellets of a resin composition. The pellets of the resin composition were sheeted using a Tanabe Plastics Machinery 20mmφ single-screw extruder VS20-14 at a resin temperature of 230°C and a thickness of 50 μm. The dyeability of the obtained sheet was evaluated.

[0172] Example 2 80% by mass of polymer (A-1), 4% by mass of polymer (A-2), 5.0% by mass of polymer (B-1-1), 10% by mass of polymer (B-2-1), and 1% by mass of polymer (C-1) were uniformly mixed in powder form, and then kneaded using a JSW TEX25αIII-52.5CW-4V at a resin temperature of 230°C and a discharge rate of 21 kg / h to obtain pellets of a resin composition. The pellets of the resin composition were fiberized using a Musashino Kikai 30mmφ multifilament manufacturing device at a resin temperature of 250°C and a fiber thickness of 32μm. The dyeability of the obtained fiber was evaluated.

[0173] Example 3 82% by mass of polymer (A-1), 5.0% by mass of polymer (B-1-1), 10% by mass of polymer (B-2-1), and 3% by mass of polymer (C-1) were uniformly mixed in powder form, and then kneaded using a ZSK58MC manufactured by Coperion at a resin temperature of 230°C and a discharge rate of 21 kg / h to obtain a resin composition. The resin composition was fiberized using a 30 mmφ multifilament manufacturing device manufactured by Musashino Kikai at a resin temperature of 250°C and a fiber thickness of 32 μm. The dyeability of the obtained fiber was evaluated.

[0174] Example 4 19% by mass of polymer (A-1), 43% by mass of polymer (A-3), 26% by mass of polymer (A-4), 5.0% by mass of polymer (B-1-1), 5% by mass of polymer (B-2-1), and 1% by mass of polymer (C-1) were uniformly mixed in powder form, and then kneaded using a Coperion ZSK58MC at a resin temperature of 240°C and a discharge rate of 21 kg / h to obtain a resin composition. The resin composition was fiberized using an IKG PMS30-25 multifilament manufacturing device at a resin temperature of 250°C and a fiber thickness of 32 μm. The dyeability of the obtained fiber was evaluated.

[0175] Example 5 19% by mass of polymer (A-1), 43% by mass of polymer (A-3), 26% by mass of polymer (A-4), 5.0% by mass of polymer (B-1-1), 5% by mass of polymer (B-2-3), and 1% by mass of polymer (C-1) were uniformly mixed in powder form, and then kneaded using a Coperion ZSK58MC at a resin temperature of 240°C and a discharge rate of 21 kg / h to obtain a resin composition. The resin composition was fiberized using an IKG PMS30-25 multifilament manufacturing device at a resin temperature of 250°C and a fiber thickness of 32 μm. The dyeability of the obtained fiber was evaluated.

[0176] Example 6 20% by mass of polymer (A-1), 44.5% by mass of polymer (A-3), 26% by mass of polymer (A-4), 2.5% by mass of polymer (B-1-1), 5% by mass of polymer (B-2-3), and 1% by mass of polymer (C-1) were uniformly mixed in powder form, and then kneaded using a Coperion ZSK58MC at a resin temperature of 240°C and a discharge rate of 21 kg / h to obtain a resin composition. The resin composition was fiberized using an IKG PMS30-25 multifilament manufacturing device at a resin temperature of 250°C and a fiber thickness of 32 μm. The dyeability of the obtained fiber was evaluated.

[0177] Example 7 58% by mass of polymer (A-3), 30.5% by mass of polymer (A-4), 5% by mass of polymer (B-1-1), and 5% by mass of polymer (B-2-3) were uniformly mixed in powder form, and then kneaded using a Coperion ZSK58MC at a resin temperature of 240°C and a discharge rate of 21 kg / h to obtain a resin composition. The resin composition was fiberized using an IKG PMS30-25 multifilament manufacturing device at a resin temperature of 250°C and a fiber thickness of 32 μm. The dyeability of the obtained fiber was evaluated.

[0178] Comparative Example 1 100% by mass of the polymer (A-1) was kneaded using a 15 mm twin-screw extruder KZW15-45MG manufactured by Technobel at a resin temperature of 210°C to obtain a resin composition. The resin composition was formed into a sheet using a 20 mmφ single-screw extruder VS20-14 manufactured by Tanabe Plastics Machinery at a resin temperature of 230°C and a thickness of 50 μm. The dyeability of the obtained sheet was evaluated.

[0179] Comparative Example 2 100% by mass of the polymer (A-1) was kneaded using a 15 mm twin-screw extruder KZW15-45MG manufactured by Technobel at a resin temperature of 210°C to obtain a resin composition. The resin composition was fiberized using a 30 mmφ multifilament manufacturing device manufactured by Musashino Kikai at a resin temperature of 250°C and a fiber thickness of 32 μm. The dyeability of the obtained fiber was evaluated.

[0180] Comparative Example 3 85.0% by mass of polymer (A-1-1), 5.0% by mass of polymer (B-1-1), and 10% by mass of polymer (B-2-2) were kneaded using a 15mm twin-screw extruder KZW15-45MG manufactured by Technobel under the condition of a resin temperature of 210°C to obtain a resin composition. The resin composition was formed into a sheet using a 20mmφ single-screw extruder VS20-14 manufactured by Tanabe Plastics Machinery under the conditions of a resin temperature of 230°C and a thickness of 50μm. The dyeability of the obtained sheet was evaluated.

[0181] Comparative Example 4 100% by mass of the polymer (B-2-2) was kneaded using a 15 mm twin-screw extruder KZW15-45MG manufactured by Technobel at a resin temperature of 210°C to obtain a resin composition. The resin composition was fiberized using a 30 mmφ multifilament manufacturing device manufactured by Musashino Kikai at a resin temperature of 250°C and a fiber thickness of 32 μm. The dyeability of the obtained fiber was evaluated.

[0182] The conditions and results are shown in Tables 1 to 3.

[0183] [Table 1] [Table 2] [Table 3]

Claims

1. A resin composition comprising an olefin polymer A, a polymer B-1, and a polymer B-2, The polymer B-1 is an aliphatic polyester polymer, The polymer B-2 is an aromatic polyester polymer having a heat of fusion measured by differential scanning calorimetry in the range of 0 to 25 J / g, The resin composition, wherein the content of the polymer A is 64 to 95 parts by mass, the content of the polymer B-1 is 1 to 15 parts by mass, and the content of the polymer B-2 is 1 to 35 parts by mass, relative to 100 parts by mass in total of the polymer A, the polymer B-1, and the polymer B-2.

2. The resin composition according to claim 1, wherein the polymer B-1 is a polyhydroxyalkanoate-based polymer.

3. The resin composition according to claim 1, wherein the polymer B-1 is a poly(3-hydroxyalkanoate)-based polymer.

4. The content of the polymer A is 79 to 90 parts by mass, the content of the polymer B-1 is 1 to 15 parts by mass, and the content of the polymer B-2 is 1 to 20 parts by mass, relative to a total of 100 parts by mass of the polymer A, the polymer B-1, and the polymer B-2. The resin composition according to any one of claims 1 to 3.

5. The resin composition according to any one of claims 1 to 3, wherein the polymer A comprises a propylene homopolymer.

6. A molded article of the resin composition according to any one of claims 1 to 3.

7. The molded article according to claim 6, which is a fiber.

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