Composition

Abstract

Composition I comprises a polymer B and a compound C. And the polymer B is an aliphatic polyester polymer. The content of the compound C is 0.01-20 parts by mass per 100 parts by mass of the total of the polymer B and the compound C. Compound C satisfies the following necessary condition 1. Condition 1: MFR (X) / MFR (B) is 2.0 or less, where MFR (B) is the melt mass flow rate of the polymer B measured under the conditions of a temperature of 210 DEG C and a load of 2.16 kgf, and MFR (X) is the melt mass flow rate of the mixture X measured under the conditions of a temperature of 210 DEG C and a load of 2.16 kgf, and the mixture X contains 0.5 parts by mass of the compound C per 100 parts by mass of the total of the polymer B and the compound C.

Description

Technical Field

[0001] The present invention relates to compositions. Background Art

[0002] Aliphatic polyester polymers are resins with low environmental load that can be synthesized using renewable resources without using fossil resources, and are resins with excellent molding processability and mechanical properties. Therefore, to date, aliphatic polyester polymers have been added to various packaging materials, various containers such as bottles, food packaging materials, container covers, stationery, daily groceries, fibers for carpets or sofas, interior and exterior materials for automobiles, electrical / electronic equipment parts, and building or residential interior materials, thereby reducing environmental load. In recent years, for these articles, there has been a frequent demand for improvement of the reduction in mechanical properties caused by the deterioration of aliphatic polyester polymers caused by heat and light.

[0003] Therefore, as one means for satisfying these requirements, as described in Patent Document 1, a method of blending a known stabilizer mixture such as a phenolic antioxidant, a phosphite or a phosphite, and a sulfur-containing synergist into an aliphatic polyester polymer can be considered.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application No. 2011-526317 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, in the case of aliphatic polyester polymers, known stabilizers such as phenolic antioxidants, phosphites or phosphites, and sulfur-containing synergists may further promote the reduction of molecular weight due to heating. Therefore, there is a problem that even if a composition in which a phenolic antioxidant, phosphites or phosphites, and sulfur-containing synergists are blended with aliphatic polyester and a known stabilizer such as phenolic antioxidants, phosphites or phosphites, and sulfur-containing synergists is introduced into a cavity of a specific mold, and the mold is cooled to solidify the composition, the mechanical properties such as elastic modulus are also reduced due to the reduction in the molecular weight of the aliphatic polyester polymer.

[0009] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a composition having excellent mechanical properties such as elastic modulus despite containing an aliphatic polyester-based polymer.

[0010] Means used to solve problems

[0011] [1] A composition comprising a polymer B and a compound C, wherein:

[0012] The polymer B is an aliphatic polyester polymer,

[0013] The content of the compound C is 0.01 to 20 parts by mass relative to 100 parts by mass of the total of the polymer B and the compound C.

[0014] The compound C satisfies the following necessary condition 1,

[0015] Necessary condition 1: when the melt mass flow rate of the polymer B measured at a temperature of 210°C and a load of 2.16 kgf is defined as MFR(B), and the melt mass flow rate of the mixture X measured at a temperature of 210°C and a load of 2.16 kgf is defined as MFR(X), MFR(X) / MFR(B) is 2.0 or less, and the mixture X contains 0.5 parts by mass of the compound C relative to 100 parts by mass of the total of the polymer B and the compound C.

[0016] [2] The composition according to [1], wherein MFR(X) / MFR(B) in the requirement 1 is 0.8 or less.

[0017] [3] The composition according to [1] or [2], wherein the compound C is selected from compounds represented by formula (C1),

[0018] Ph 1 -X-(Ph 2 ) a … (C1)

[0019] Where a is 1 or 2, Ph 1 It is expressed by formula (C2):

[0020]

[0021] R 1 independently selected from the group consisting of alkyl groups having 1 to 5 carbon atoms excluding t-Bu groups, h is an integer of 1 to 3, i is an integer of 1 to 3, j is an integer of 0 to 3, h+i+j is 5 or less, and at least one t-Bu group must be present at the ortho position of at least one OH group,

[0022] Ph 2 It is expressed by formula (C3):

[0023]

[0024] m is an integer of 0 to 3, n is an integer of 0 to 3, p is an integer of 0 to 3, m+n+p is 5 or less, R 7 are independently selected from the group consisting of alkyl groups having 1 to 5 carbon atoms excluding t-Bu groups,

[0025] X is selected from -OC(=O)-, -(O=)CO-, -C(R 8 )2-, -S-, -O-, a divalent or trivalent aromatic hydrocarbon group having 6 to 14 carbon atoms constituting the ring, and a group consisting of the following formula,

[0026]

[0027] R 8 are independently selected from the group consisting of a hydrogen atom and an alkyl group having 1 to 5 carbon atoms,

[0028] The * in the structural formula indicates the bonding position.

[0029] [4] The composition according to any one of [1] to [3], comprising a first compound C having an MFR(X) / MFR(B) of 0.8 or less and a second compound C having an MFR(X) / MFR(B) of greater than 0.8 and less than or equal to 1.0.

[0030] [5] The composition according to any one of [1] to [4], wherein the polymer B accounts for more than 50% by mass.

[0031] [6] The composition according to any one of [1] to [5], wherein the polymer B is a poly(3-hydroxyalkanoate) polymer having a melting point of 150° C. or higher.

[0032] [7] The composition according to any one of [1] to [6], wherein the molecular weight of the compound C is 5000 or less.

[0033] [8] A composition comprising a polyolefin polymer A, a polymer B and a compound C, wherein:

[0034] The polymer B is an aliphatic polyester polymer,

[0035] The content of the compound C is 0.01 to 20 parts by mass relative to 100 parts by mass of the total of the polymer A, the polymer B, and the compound C.

[0036] The compound C satisfies the following necessary condition 1,

[0037] Necessary condition 1: when the melt mass flow rate of the polymer B measured at a temperature of 210°C and a load of 2.16 kgf is defined as MFR(B), and the melt mass flow rate of the mixture X measured at a temperature of 210°C and a load of 2.16 kgf is defined as MFR(X), MFR(X) / MFR(B) is 2.0 or less, and the mixture X contains 0.5 parts by mass of the compound C relative to 100 parts by mass of the total of the polymer B and the compound C.

[0038] [9] The composition according to [8], wherein MFR(X) / MFR(B) in the requirement 1 is 0.8 or less.

[0039]

[10] The composition according to [8] or [9], wherein the compound C is selected from compounds represented by formula (C1),

[0040] Ph 1 -X-(Ph 2 ) a … (C1)

[0041] Where a is 1 or 2, Ph 1 It is expressed by formula (C2):

[0042]

[0043] R 1 independently selected from the group consisting of alkyl groups having 1 to 5 carbon atoms excluding t-Bu groups, h is an integer of 1 to 3, i is an integer of 1 to 3, j is an integer of 0 to 3, h+i+j is 5 or less, and at least one t-Bu group must be present at the ortho position of at least one OH group,

[0044] Ph 2 It is expressed by formula (C3):

[0045]

[0046] m is an integer of 0 to 3, n is an integer of 0 to 3, p is an integer of 0 to 3, m+n+p is 5 or less, R 7 are independently selected from the group consisting of alkyl groups having 1 to 5 carbon atoms excluding t-Bu groups,

[0047] X is selected from -OC(=O)-, -(O=)CO-, -C(R 8 )2-, -S-, -O-, a divalent or trivalent aromatic hydrocarbon group having 6 to 14 carbon atoms constituting the ring, and a group consisting of the following formula,

[0048]

[0049] R8 are independently selected from the group consisting of a hydrogen atom and an alkyl group having 1 to 5 carbon atoms,

[0050] The * in the structural formula indicates the bonding position.

[0051]

[11] The composition according to any one of [8] to

[10] , wherein the composition comprises a first compound C having an MFR(X) / MFR(B) of 0.8 or less and a second compound C having an MFR(X) / MFR(B) of greater than 0.8 and less than or equal to 1.0.

[0052]

[12] The composition according to any one of [8] to

[11] , wherein the composition contains more than 50 parts by mass of the olefin polymer A when the total of the polyolefin polymer A and the polymer B is 100 parts by mass.

[0053]

[13] The composition according to any one of [8] to

[12] , wherein the polymer B is a poly(3-hydroxyalkanoate) polymer having a melting point of 150° C. or higher.

[0054]

[14] The composition according to any one of [8] to

[13] , wherein the molecular weight of the compound C is 5000 or less.

[0055] Effects of the Invention

[0056] According to the present invention, a composition having excellent mechanical properties can be provided despite containing an aliphatic polyester-based polymer. DETAILED DESCRIPTION

[0057] Several embodiments of the present invention are described in detail below, but the present invention is not limited to the following embodiments.

[0058] (Composition I)

[0059] The composition I of the embodiment includes the polymer B and the compound C, and may include the olefin polymer A.

[0060] <Polymer B>

[0061] Polymer B is an aliphatic polyester polymer.

[0062] The aliphatic polyester-based polymer has a structure of a polycondensate of an aliphatic polycarboxylic acid component and an aliphatic polyol component, or a polycondensate of an aliphatic hydroxycarboxylic acid, and the main chain of the repeating unit does not contain an aromatic hydrocarbon structure.

[0063] Examples of aliphatic polyester polymers include polymers of hydroxycarboxylic acids or lactones, polycondensates of diols and dicarboxylic acids, and copolymers thereof. When polymer B is a copolymer, the copolymer may be arranged in any of a random copolymer, an alternating copolymer, a block copolymer, a graft copolymer, and the like.

[0064] In addition, these polymers may be polymers at least partially cross-linked with a cross-linking agent such as polyisocyanates such as xylylene diisocyanate and 2,4-toluene diisocyanate, or polysaccharides such as cellulose, acetyl cellulose, and ethyl cellulose. In addition, at least a portion of these polymers may have any structure such as a linear, cyclic, branched, star, 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.

[0065] In addition, the polymer B may be used alone or in combination.

[0066] Examples of the hydroxycarboxylic acid include hydroxycarboxylic acids having 2 to 18 carbon atoms, preferably hydroxycarboxylic acids having 6 or less carbon atoms, and most preferably hydroxycarboxylic acids having 4 carbon atoms. Specifically, examples include glycolic acid, L-lactic acid, D-lactic acid, D,L-lactic acid, 3-hydroxybutyric acid, 3-hydroxyvaleric acid, 3-hydroxypropionic acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid, 5-hydroxyvaleric acid, 3-hydroxyvaleric acid, 3-hydroxyhexanoic acid, 3-hydroxyheptanoic acid, 3-hydroxyoctanoic acid, 3-hydroxynonanoic acid, and 3-hydroxydecanoic acid.

[0067] Examples of the lactone include propiolactone, butyrolactone, valerolactone, caprolactone, and laurolactone.

[0068] As the diol, a diol having 2 to 10 carbon atoms is preferred. Among them, an aliphatic diol having 2 to 4 carbon atoms or an alicyclic diol having 5 to 6 carbon atoms is more preferred. Specifically, ethylene glycol, 1,3-propylene glycol, 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-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, etc. are mentioned.

[0069] As the dicarboxylic acid, an aliphatic dicarboxylic acid having 2 to 12 carbon atoms is preferred. Among them, an aliphatic dicarboxylic acid having 2 to 6 carbon atoms or an alicyclic dicarboxylic acid having 56 carbon atoms is more preferred. Specifically, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, 1,14-tetradecanedioic acid, 1,16-hexadecanedioic acid, 1,18-octadecanediic acid, dimer acid and its hydrogenated product, hexahydrophthalic acid, hexahydroisophthalic acid, hexahydroterephthalic acid, etc., can be mentioned. In addition, these dicarboxylic acids may be derivatives such as alkyl esters and anhydrides having 1 to 4 carbon atoms.

[0070] Among the above-mentioned aliphatic polyester polymers, polylactic acid, polybutylene succinate, poly(butylene succinate-co-butylene adipate), polycaprolactone, poly(3-hydroxybutyrate), poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), and polyglycolic acid are preferably used.

[0071] When polylactic acid is used as polymer B, the polylactic acid is preferably one in which the ratio of the L-form in the lactic acid component constituting the polylactic acid is 94 mol % or more. By setting the ratio of the L-form within such a range, a decrease in the melting point can be prevented.

[0072] (Poly(3-hydroxyalkanoate) polymer)

[0073] The polymer B may be a poly(3-hydroxyalkanoate)-based polymer having a melting point of 150° C. or higher.

[0074] The poly(3-hydroxyalkanoate) polymer is a polyhydroxyalkanoate, i.e., a polycondensate (polyester) of hydroxyalkanoic acid, and necessarily contains a repeating unit of a 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 18 carbon atoms, an alkoxy group having 1 to 11 carbon atoms (alkyloxy group), an amide group having 1 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 polymer B (e.g., polymer A) contained in the composition, 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.

[0075] [-O-CHR-CH2-CO-] … (1)

[0076] Examples of the halogen atom include F, Cl, Br and I.

[0077] The alkyl group having 1 to 15 carbon atoms may be straight-chain 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 methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, 2-methylbutyl, 1-methylbutyl, hexyl, isohexyl, 3-methylpentyl, 2-methylpentyl, 1-methylpentyl, heptyl, octyl, isooctyl, 2-ethylhexyl, 3,7-dimethyloctyl, nonyl, decyl, undecyl, dodecyl, tetradecyl, and pentadecyl.

[0078] Examples of the amino group having 1 to 18 carbon atoms include amino, alkylamino, dialkylamino, arylamino, alkylarylamino, benzylamino, and dibenzylamino.

[0079] Examples of the alkylamino group include methylamino, ethylamino, propylamino, butylamino, pentylamino, hexylamino, heptylamino, octylamino, nonylamino, decylamino, dodecylamino, isopropylamino, isobutylamino, isopentylamino, sec-butylamino, tert-butylamino, sec-pentylamino, tert-pentylamino, tert-octylamino, neopentylamino, cyclopropylamino, cyclobutylamino, cyclopentylamino, cyclohexylamino, cycloheptylamino, cyclooctylamino, 1-adamantylamino, and 2-adamantylamino.

[0080] Examples of the dialkylamino group include dimethylamino, diethylamino, dipropylamino, dibutylamino, dipentylamino, diisopropylamino, diisobutylamino, diisopentylamino, methylethylamino, methylpropylamino, methylbutylamino, methylisobutylamino, dicyclopropylamino, 1-pyrrolidinyl, 1-piperidinyl and 1-piperazinyl.

[0081] Examples of the arylamino group include anilino, 1-naphthylamino, 2-naphthylamino, o-toluidinyl, m-toluidinyl, p-toluidinyl, 1-fluorenylamino, 2-fluorenylamino, 2-thiazolylamino, and p-terphenylamino.

[0082] The alkylarylamino group includes N-methylanilino, N-ethylanilino, N-propylanilino, N-butylanilino, N-isopropylanilino and N-pentylanilino.

[0083] Examples of the alkoxy group having 1 to 11 carbon atoms include methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, tert-butoxy, cyclopropyloxy, cyclobutyloxy, and cyclopentyloxy.

[0084] An "amide group" refers to a group obtained by removing a hydrogen atom bonded to a nitrogen atom from a carboxylic acid amide. Examples of amide groups having 1 to 20 carbon atoms include formamide, acetamide, propionamide, butyramide, benzamide, trifluoroacetamide, pentafluorobenzamide, etc. A A group represented by A is a hydrogen atom or a monovalent organic group); and diformamide, diacetamide, dipropionamide, dibutyramide, dibenzamide, di(trifluoroacetyl)amide, di(pentafluorobenzoyl)amide, etc. are represented by -N(-C(=O)-R A )(-C(=O)-R B ) represented by a group (where R A , R B Each of them is independently a hydrogen atom or a monovalent organic group). The organic group may be an alkyl group which may be substituted by a halogen atom, an alkoxy group which may be substituted by a halogen atom, or an aryl group which may be substituted by a halogen atom. Among them, the amide group is preferably a formamide group, an acetamide group, a propionamide group, a butyramide group, or a benzamide group.

[0085] Examples of the aryl group having 6 to 12 carbon atoms include phenyl, tolyl, xylyl, naphthyl, and biphenylyl. Among them, phenyl, tolyl, and xylyl are more preferred.

[0086] Examples of heteroatoms in the monovalent heterocyclic group having 1 to 9 carbon atoms include N, O and S. The group may be saturated or unsaturated, and may have one or more heteroatoms, or may have different types of heteroatoms. Examples of such heterocyclic groups include thienyl, pyrrolyl, furanyl, pyridyl, piperidyl, quinolyl, isoquinolyl, pyrimidinyl, triazinyl and thiazolyl.

[0087] The repeating unit of the polymer B may contain only one or more 3-hydroxyalkanoic acid esters represented by the formula (1), or may contain one or more 3-hydroxyalkanoic acid esters represented by the formula (1) and one or more other hydroxyalkanoic acid esters.

[0088] In the polymer B, preferably 50 mol % or more, and more preferably 70 mol % or more, of the repeating units of the 3-hydroxyalkanoate represented by the formula (1) are contained, based on all the repeating units of the hydroxyalkanoate (100 mol %).

[0089] Examples of 3-hydroxyalkanoic acid esters represented by the formula (1) include: R is a hydrogen atom or a C n H 2n+1The alkyl group represented by the invention, when n is an integer of 1 to 15, is 3-hydroxybutyrate (hereinafter sometimes referred to as 3HB) with n=1, 3-hydroxyvalerate (hereinafter sometimes referred to as 3HV) with n=2, 3-hydroxyhexanoate (hereinafter sometimes referred to as 3HH) with n=3, 3-hydroxyoctanoate with n=5, 3-hydroxyoctadecanoate with n=15, and 3-hydroxypropionate wherein R is a hydrogen atom.

[0090] Examples of the polymer B having only one type of repeating unit represented by the formula (1) include poly(3-hydroxybutyrate) (hereinafter sometimes referred to as P3HB).

[0091] Examples of polymer B having only a plurality of repeating units represented by formula (1) include poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (hereinafter sometimes referred to as P3HB3HH), poly(3-hydroxybutyrate-co-hydroxyvalerate) (hereinafter sometimes referred to as P3HB3HV), and poly(3-hydroxybutyrate-co-hydroxypropionate) (hereinafter sometimes referred to as P3HB3HP).

[0092] Examples of other hydroxyalkanoic acid esters other than the 3-hydroxyalkanoic acid ester represented by the formula (1) include a repeating unit represented by the formula (2) (in the formula (2), R 1 A hydrogen atom or a C n H 2n+1 The alkyl group represented by is, wherein n is an integer of 1 to 15, and m is an integer of 2 to 10).

[0093] [-O-CHR 1 -C m H 2m+1 -CO-] … (2)

[0094] Examples of polymer B comprising repeating units of formula (1) and formula (2) include poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (eg, the following formula (P3HB4HB)).

[0095] From the viewpoint of increasing the melting point, the repeating unit of the polymer B preferably contains at least 3-hydroxybutyrate among the 3-hydroxyalkanoate represented by the formula (1).

[0096] In the polymer B, preferably 50 mol % or more, and more preferably 70 mol % or more, of repeating units of 3-hydroxybutyrate based on all repeating units of hydroxyalkanoate (100 mol %).

[0097] The polymer B may have two or more types of ester repeating units, and may be, for example, a binary polymer having two types of repeating units, a ternary polymer having three types of repeating units, or a tetrapolymer having four types of repeating units as described above.

[0098] For example, examples of the terpolymer include poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxyhexanoate) (hereinafter, sometimes described as (P3HB3HV3HH)).

[0099] As described above, the polymer B preferably contains 3-hydroxybutyrate in the repeating unit of 3-hydroxyalkanoate represented by formula (1). The ratio XX of the repeating unit of 3-hydroxybutyrate is preferably 90 mol% or more, more preferably 95 mol% or more, and further preferably 98.0 mol% or more, relative to 100 mol of all ester repeating units of hydroxyalkanoate.

[0100] The ratio XX is usually 100 mol % or less, preferably 99.9 mol % or less, and preferably 99.8 mol % or less.

[0101] The arrangement of the copolymer may be any of random copolymer, alternating copolymer, block copolymer, graft copolymer and the like.

[0102] Polymer B may have other ester repeating units other than formula (1) and formula (2), but the main chain of the other ester repeating units does not contain an aromatic hydrocarbon structure. That is, polymer B is an aliphatic polyester. However, a group having an aromatic hydrocarbon group may be bonded to a carbon in the main chain of the other ester repeating unit.

[0103] The constitutional ratio of the repeating units in the polymer B can be calculated from the results of NMR measurement such as 1H-NMR or 13C-NMR as described in L. Tripathi., MC Factories, 11, 44 (2012).

[0104] In addition, the polymer B may be a mixture of two or more types of poly(3-hydroxyalkanoate)-based polymers.

[0105] The weight average molecular weight (Mw) of polymer B can be 10,000 to 1,000,000, preferably 20,000 to 800,000, and more preferably 30,000 to 600,000. By adjusting the weight average molecular weight (Mw) to 10,000 or more, a molded body with excellent impact strength and tensile elongation can be obtained. In addition, by adjusting the weight average molecular weight to 500,000 or less, the dispersibility in the olefin polymer A becomes good. The weight average molecular weight can be 400,000 or less, 300,000 or less, 200,000 or less, or 100,000 or less. It should be noted that in this specification, the weight average molecular weight (Mw) is measured by GPC using standard polystyrene as a molecular weight standard substance.

[0106] The polymer B is a thermoplastic resin, and is preferably crystalline.

[0107] The melt mass flow rate (MFR(B)) of polymer B measured under the conditions of a temperature of 190°C or 170°C and a load of 2.16 kgf in accordance with JIS K7210-2014 is preferably 0.1 g / 10 min or more and 200 g / 10 min or less. MFR(B) 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) may be 150 g / 10 min or less, or 100 g / 10 min or less.

[0108] The melting point (Tm) of polymer B is 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 polymer B may be 220°C or lower, 200°C or lower, or 190°C or lower.

[0109] The melting point (Tm) of the polymer B is measured from the position of a main peak due to melting of the crystal determined by differential scanning calorimetry (DSC) in accordance with JIS K7121.

[0110] The poly(3-hydroxyalkanoate) polymer may be a poly(3-hydroxyalkanoate) polymer produced by microorganisms, or a poly(3-hydroxyalkanoate) polymer produced from a compound derived from petroleum or plant raw materials (such as cyclic lactones).

[0111] The poly(3-hydroxyalkanoate)-based polymer may be one in which each repeating unit of hydroxyalkanoate is composed of only D-form (R-form) as in the case of a poly(3-hydroxyalkanoate)-based polymer produced by a microorganism, or one in which the repeating unit of hydroxyalkanoate contains both D-form (R-form) and L-form (S-form) as in the case of a poly(3-hydroxyalkanoate)-based polymer derived from a mixture of D-form (R-form) and L-form (S-form).

[0112] In the poly(3-hydroxyalkanoate)-based polymer produced by microorganisms, the repeating unit of formula (1) can be represented by the following formula: In formula (BI-1), n ​​represents the degree of polymerization.

[0113]

[0114] Furthermore, for example, poly(3-hydroxybutyrate) produced by a microorganism has the following structure. In formula (BI-2), n represents the degree of polymerization.

[0115]

[0116] In addition, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) produced by a microorganism has the following structure. In formula (BI-3), m and n represent the degree of polymerization.

[0117]

[0118] In addition, poly(3-hydroxybutyrate-co-4-hydroxybutyrate) produced by a microorganism has the following structure: In formula (BI-4), m and n represent the degree of polymerization.

[0119]

[0120] Polymer B may be biodegradable.

[0121] For example, poly(3-hydroxyalkanoate)-based polymers can be produced by using microorganisms such as Alcaligenes eutrophus AC32 strain (international deposit based on the Budapest Treaty, international depositary unit: Patent Organism Depository of the National Institute of Advanced Industrial Science and Technology (1-1-1, Central 6, Tsukuba-shi, Ibaraki, Japan), which is obtained by introducing a PHA synthase gene derived from Aeromonas caviae into Alcaligenes eutrophus) (J. Bacteriol., 179, 4821 (1997)).

[0122] (Compound C)

[0123] Compound C satisfies the following requirement 1.

[0124] Necessary condition 1: when the melt mass flow rate of polymer B measured at a temperature of 210°C and a load of 2.16 kgf is defined as MFR(B), and the melt mass flow rate of mixture X measured at a temperature of 210°C and a load of 2.16 kgf is defined as MFR(X), MFR(X) / MFR(B) is 2.0 or less, and the mixture X contains 0.5 parts by mass of compound C relative to 100 parts by mass of the total of polymer B and compound C.

[0125] MFR(X) / MFR(B) may be 1.5 or less, 1.0 or less, 0.9 or less, or 0.8 or less.

[0126] MFR(X) / MFR(B) is a value determined according to the type of compound C. In addition, MFR(X) / MFR(B) may vary according to the type of compound C as well as the polymer B.

[0127] MFR (X) and MFR (B) are melt mass flow rates measured in a barrel completely shielded from light. The residence time in the barrel can be set to 5 minutes.

[0128] Compound C may be a single compound showing an MFR(X) / MFR(B) ratio of 2.0 or less, or may be a mixture of two or more compounds showing an MFR(X) / MFR(B) ratio of 2.0 or less.

[0129] When the polymer B deteriorates due to the addition of compound C, MFR(X) becomes larger than MFR(B). When the polymer B deteriorates due to the addition of compound C, MFR(X) becomes smaller than MFR(B). That is, MFR(X) / MFR(B) being 2.0 or less means that compound C is a compound that is unlikely to significantly cause the aliphatic polyester polymer B to deteriorate due to heating.

[0130] In addition, the fact that MFR(X) / MFR(B) is 0.8 or less means that the compound C is a compound that can sufficiently suppress the degradation of the aliphatic polyester polymer B due to heating.

[0131] The molecular weight of each compound C is not particularly limited, but is preferably 5,000 or less.

[0132] Compound C is not particularly limited as long as it satisfies the above MFR (X) / MFR (B), and may preferably be an aromatic compound or an aliphatic compound. Compound C is, for example, selected from one or more aromatic compounds, one or more aliphatic compounds, and a combination of one or more aromatic compounds and one or more aliphatic compounds.

[0133] (Aromatic compounds)

[0134] Aromatic compounds include unsubstituted compounds, monosubstituted compounds, disubstituted compounds and trisubstituted or higher polysubstituted compounds, etc. Examples of monosubstituted compounds and disubstituted compounds include alkylbenzene compounds, isoalkylbenzene compounds, phenol compounds, benzyl alcohol compounds, anisole compounds, carbonylbenzene compounds, aniline compounds, benzotriazole compounds, nitrobenzene compounds, styrene compounds, salicylic acid compounds, toluidine compounds, etc. Examples of aromatic polycyclic compounds include biphenyl compounds, benzophenone compounds, triphenylmethane compounds, phenolphthalein compounds, etc. These monosubstituted compounds, disubstituted compounds and trisubstituted or higher polysubstituted compounds may form a polycyclic or condensed ring structure.

[0135] Examples of aromatic compounds are shown below.

[0136] <Alkylbenzene compounds, isoalkylbenzene compounds>

[0137] Toluene, o-xylene, m-xylene, p-xylene, ethylbenzene, isopropylbenzene, p-isopropyltoluene.

[0138] <Phenol compounds>

[0139] Phenol, butylated hydroxytoluene, bisphenol A, o-cresol, m-cresol, p-cresol, estradiol, eugenol, trihydroxybenzene, methoxyphenol, trinitrophenol, phenolphthalein, 5-hydroxytryptamine, 4-(2-aminoethyl)benzene-1,2-diphenol, 4-[1-hydroxy-2-(methylamino)ethyl]benzene-1,2-diphenol, 2-isopropyl-5-methylphenol compounds, 4-hydroxyphenylalanine, diethylstilbestrol, L-3,4-dihydroxyphenylalanine, methyl 2-hydroxybenzoate, propofol compounds, salicylic acid compounds.

[0140] <Phenolic antioxidants>

[0141] 1,3,5-Tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione (ADKSTAB AO-20),

[0142] 4,4',4"-(1-methylpropyl-3-ylidene)tri(6-tert-butyl-m-cresol) (ADK STAB AO-30),

[0143] 6,6'-di-tert-butyl-4,4'-butylidene dimethylphenol (AO-40) (C101),

[0144] Pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (ADK STAB AO-60) (Irganox1010),

[0145] 3,9-Bis[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane (ADK STAB AO-80),

[0146] 2,4,6-Tris(3',5'-di-tert-butyl-4'-hydroxybenzyl)-mesitylene (C103) (ADK STAB AO-80),

[0147] 2,2'-Methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol] (ADKSTAB LA-31RG),

[0148] 2-(4,6-diphenyl-1,3,5-triazine-2-yl)-5-(hexyloxy)phenol (ADK STAB LA-46),

[0149] 6,6',6"-(1,3,5-triazine-2,4,6-triyl)tris(3-hexyloxy-2-methylphenol),

[0150] 2,2'-Methylenebis(6-cyclohexyl-p-cresol),

[0151] N,N'-(hexane-1,6-diyl)bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide),

[0152] 2,4,6-Tris(3',5'-di-tert-butyl-4'-hydroxybenzyl)-mesitylene,

[0153] 2,2',6,6'-Tetra-tert-butyl-4,4'-dihydroxybiphenyl, galvanoxyl radical,

[0154] Bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid][oxalylbis(azanediyl)]bis(ethane-2,1-diyl),

[0155] 4-(Hexyloxy)-2,3,6-trimethylphenol,

[0156] 2-Methyl-4,6-bis[(n-octylthio)methyl]phenol,

[0157] 2,5-di-tert-amylhydroquinone, 2,4-bis[(dodecylthio)methyl]-6-methylphenol,

[0158] 6-tert-Butyl-2,4-xylenol,

[0159] 3,6-Dihydroxybenzonorbornane,

[0160] 2,6-di-tert-butyl-4-methoxyphenol, 2,6-di-tert-butylphenol, 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl ester,

[0161] 4,4'-Thiobis(6-tert-butyl-m-cresol) (C102),

[0162] 2,5-bis(1,1,3,3-tetramethylbutyl)hydroquinone, 4,4'-butylidenebis(6-tert-butyl-m-cresol),

[0163] 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid,

[0164] Bis[3-[3-(tert-butyl)-4-hydroxy-5-methylphenyl]propanoate]2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diylbis(2-methylpropane-2,1-diyl) (Sumilizer GA80),

[0165] 2,2'-Methylenebis[6-(1-methylcyclohexyl)-p-cresol],

[0166] 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid methyl ester,

[0167] 1,3,5-Tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6(1H,3H,5H)-trione,

[0168] 4-[[4,6-bis(n-octylthio)-1,3,5-triazine-2-yl]amino]-2,6-di-tert-butylphenol,

[0169] 2,6-di-tert-butyl-4-ethylphenol, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid methyl ester,

[0170] Triethylene glycol bis[3-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate],

[0171] 2,4,6-tris(2,4-dihydroxyphenyl)-1,3,5-triazine,

[0172] 3,3',5,5'-Tetra-tert-butyl-4,4'-stilbenequinone,

[0173] 3,5-di-tert-butyl-4-hydroxybenzylsulfonic acid diethyl ester, 4,6-di-tert-butylresorcinol,

[0174] 3-(3,5-di-tert-butyl-4-hydroxyphenyl)-N'-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]propionylhydrazide, 4,4'-dihydroxy-3,3',5,5'-tetraisopropylbiphenyl,

[0175] 2,6-di-tert-butyl-p-cresol, 2,2'-methylenebis(6-tert-butyl-4-ethylphenol),

[0176] 2,5-di-tert-butylhydroquinone,

[0177] 2-tert-butyl-6-(3-tert-butyl-2-hydroxy-5-methylbenzyl)-4-methylphenyl acrylate (SumilizerGM), pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate],

[0178] 2-Mercaptobenzimidazole,

[0179] Acrylate 1'-hydroxy[2,2'-ethylidenebis[4,6-bis(1,1-dimethylpropyl)phenyl]]-1-yl ester (Sumilizer GS),

[0180] 2,2'-Methylenebis(4-methyl-6-tert-butylphenol)(Sumilizer MDP-S),

[0181] 4,4'-Thiobis(6-tert-butyl-m-cresol) (Sumilizer WX-R).

[0182] (UVA)

[0183] 2-Hydroxy-4-octyloxybenzophenone (Sumisorb130),

[0184] 2-(2'-Hydroxy-5'-methylphenyl)benzotriazole (Sumisorb200),

[0185] 2-[2-Hydroxy-3-(3,4,5,6-tetrahydrophthalimidomethyl)-5-methylphenyl]benzotriazole (Sumisorb 250),

[0186] 2-(2-Hydroxy-5-tert-octylphenyl)benzotriazole (Sumisorb340),

[0187] 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)phenol (Sumisorb350),

[0188] 3,5-di-tert-butyl-4-hydroxybenzoic acid 2,4-di-tert-butylphenyl ester (Sumisorb400) (C100),

[0189] 2-(5-tert-butyl-2-hydroxyphenyl)benzotriazole (Tinuvin PS),

[0190] 3-[3-(2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl]propionic acid C7-C9 alkyl ester (Tinuvin99-2),

[0191] Bumetriazole (Tinuvin 326),

[0192] 2-[2-Hydroxy-3,5-bis(α,α-dimethylbenzyl)phenyl]-2H-benzotriazole (Tinuvin900),

[0193] 2-(2H-benzotriazol-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol (Tinuvin928),

[0194] 2-[4-([2-hydroxy-3-dodecyloxypropyl]oxy)-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine (Tinuvin400),

[0195] 2-[4-([2-hydroxy-3-tridecyloxypropyl]oxy)-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine (Tinuvin400),

[0196] 2-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]-2-butylmalonic acid bis[1,2,2,6,6-pentamethyl-4-piperidinyl]ester (Tinuvin144),

[0197] 2,2'-Thiodiethyl bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (Irganox1035),

[0198] 3,5-di-tert-butyl-4-hydroxy-hydrocinnamic acid octyl ester (Irganox1135),

[0199] 2,4-Bis[(dodecylthio)methyl]-6-methylphenol (Irganox1726),

[0200] 4-Hydroxybenzoic acid phenyl ester,

[0201] 2,6-di(tert-butyl)-4-(methoxycarbonyl)phenol,

[0202] 3,5-di-tert-butylphenol,

[0203] 3,3',5,5'-Tetra-tert-butyl-2,2'-dihydroxybiphenyl,

[0204] 2,6-Diisopropylphenol,

[0205] 2,4,6-tri-tert-butylphenol,

[0206] Isocyanuric acid tris (4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) ester,

[0207] 2-Hydroxy-4-methoxybenzophenone,

[0208] 2,2'-Dihydroxy-4-methoxybenzophenone,

[0209] 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine-2-yl]-5-(octyloxy)phenol,

[0210] 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine-2-yl]-5-(isooctyloxy)phenol,

[0211] 2,4-di-tert-pentylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate,

[0212] Mono(di, tri)(α-methylbenzyl)phenol (ANTAGE SP),

[0213] Zinc dimethyldithiocarbamate (ACCEL PZ),

[0214] Zinc diethyldithiocarbamate (ACCEL EZ),

[0215] Zinc dibutyldithiocarbamate (II) (ACCEL EZ),

[0216] 4-Phenoxyphenol,

[0217] 4,4'-dihydroxydiphenyl ether,

[0218] 4-(4-Hydroxyphenoxy)benzoic acid,

[0219] DL-thyroxine,

[0220] 2-[(Diphenylphosphino)methyl]phenol,

[0221] 2,5-Dihydroxyphenyl(diphenyl)phosphine oxide.

[0222] <Amine compounds>

[0223] N,N'-di-sec-butyl-1,4-phenylenediamine,

[0224] N-(1,3-dimethylbutyl)-N'-phenyl-1,4-phenylenediamine,

[0225] 4,4'-Bis(α,α-dimethylbenzyl)diphenylamine,

[0226] 4-isopropylaminodiphenylamine,

[0227] 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline,

[0228] N-phenyl-1-naphthylamine,

[0229] N,N'-diphenyl-1,4-phenylenediamine,

[0230] N,N'-di-2-naphthyl-1,4-phenylenediamine,

[0231] N,N'-1,3-phenylene bismaleimide,

[0232] Sebacate-1-methyl-10-(1,2,2,6,6-pentamethyl-4-piperidinyl) ester,

[0233] Poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl]-[(2,2,6,6-tetramethyl-4-piperidinyl)imino]-hexane-1,6-diyl-[(2,2,6,6-tetramethyl-4-piperidinyl)imino],

[0234] 6-(2-Benzotriazolyl)-4-tert-octyl-6'-tert-butyl-4'-methyl-2,2'-methylenebisphenol (JAST-500),

[0235] The reaction products of diphenylamine and 2,4,4-trimethylpentene (ANTAGELDA),

[0236] Poly (2,2,4-trimethyl-1,2-dihydroquinoline),

[0237] 2,2'-(1,4-phenylene)bis(4H-3,1-benzo oxazine-4-one).

[0238] <Phosphorus-containing compounds>

[0239] Tri-p-cresyl phosphite,

[0240] Triphenyl phosphite,

[0241] Tris(2,4-di-tert-butylphenyl)phosphite (Irgafos168),

[0242] 3,9-Bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane,

[0243] Tri-o-cresyl phosphite,

[0244] 2-tert-Butyl-6-methyl-4-{3-[(2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphin-6-yl)oxy]propyl}phenol (Sumilizer GP),

[0245] 3,9-Bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane (ADK STAB PEP-36),

[0246] 2,4,8,10-Tetra-tert-butyl-6-[(2-ethylhexane-1-yl)oxy]-12H-dibenzo[d,g][1,3,2]dioxaphosphocene (ADK STAB HP-10),

[0247] Tris(nonylphenyl)phosphite (ADK STAB 1178),

[0248] 4,4'-isopropylidene diphenyl diphosphite tetraalkyl (C12-C15) ester (ADK STAB 1500),

[0249] Diphenyl phosphite (2-ethylhexyl) ester (ADK STAB C),

[0250] Isodecyl diphenyl phosphite (ADK STAB 134A),

[0251] Tritolyl phosphite (JP--3CP),

[0252] Trilauryl phosphite (JP-312L),

[0253] Tridecyl phosphite (JP-333E),

[0254] Diphenyl phosphite mono(tridecyl) ester (JPM-313),

[0255] Dipropylene glycol diphosphite tetraphenyl ester (JPP-100),

[0256] 4,4'-Butylidene bis(3-methyl-6-tert-butylphenyl di(tridecyl)phosphite)(JPH-1200),

[0257] Pentaerythritol diphosphite ditridecyl ester (JPP-88-1),

[0258] Pentaerythritol diphosphite di(nonylphenyl) ester (JPP-88-2),

[0259] Pentaerythritol diphosphite didecyl ester (JPE-10),

[0260] Tristearyl phosphite (JP-318E),

[0261] Hydrogenated bisphenol A·pentaerythritol phosphite polymer (JPH-3800),

[0262] Triphenylphosphine (JC-263).

[0263] (Aliphatic compounds)

[0264] The aliphatic compound is an acyclic or cyclic alkyl compound, which may contain a heteroatom and may be saturated or unsaturated. Examples of the aliphatic compound include phosphoric acid compounds, amine compounds, and organic sulfur compounds.

[0265] Examples of the aliphatic compound are shown below.

[0266] <Sulfur compounds>

[0267] Nickel diethyldithiocarbamate,

[0268] Pentaerythritol tetrakis[3-laurylthiopropionate],

[0269] 3,3'-di(dodecyl)thiodipropionate,

[0270] 3,3'-di(tetradecyl)thiodipropionate (Sumilizer TP-M),

[0271] Nickel(II) dibutyldithiocarbamate,

[0272] 3,3'-di(tridecyl)thiodipropionate (ADK STAB AO-503),

[0273] 2,2-Bis[[3-(dodecylthio)-1-oxopropoxy]methyl]propane-1,3-diylbis[3-(dodecylthio)propionate] (Sumilizer TP-D).

[0274] <Amine compounds>

[0275] Dimethyl succinate·1-(2-hydroxyethyl)-4-hydroxy-2,2,6,6-tetramethyl-4-piperidine polycondensate (Tinuvin111FDL),

[0276] N,N',4,7-Tetrakis{4,6-bis[N-butyl-N-(1,2,2,6,6-pentamethyl-4-piperidinyl)amino]-1,3,5-triazine-2-yl}-4,7-diazadecane-1,10-diamine (Tinuvin111FDL),

[0277] Bis[2,2,6,6-tetramethyl-1-(octyloxy)piperidin-4-yl]sebacate (Tinuvin123),

[0278] 2,4-bis[N-butyl-N-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)amino]-6-(2-hydroxyethylamino)-1,3,5-triazine (Tinuvin152),

[0279] Sebacate bis(2,2,6,6-tetramethyl-4-piperidinyl)ester (Tinuvin770DF),

[0280] Sebacate bis(1,2,2,6,6-pentamethyl-4-piperidinyl) ester (Tinuvin292),

[0281] 1,2,3,4-Butanetetracarboxylic acid tetrakis (2,2,6,6-tetramethyl-4-piperidinyl) ester (ADK STAB LA-52),

[0282] 3,4-bis{[(1,2,2,6,6-pentamethylpiperidin-4-yl)oxy]carbonyl}adipate bis(1,2,2,6,6-pentamethylpiperidin-4-yl)ester (ADK STAB LA-57),

[0283] Bis(2,2,6,6-tetramethyl-1-undecyloxypiperidin-4-yl) carbonate (ADK STAB LA-81),

[0284] 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate (ADK STAB LA-82),

[0285] 2,2,6,6-tetramethyl-4-piperidinyl methacrylate (ADK STAB LA-87),

[0286] 2,2,6,6-Tetramethyl-4-piperidinyl stearate (ADK STAB LA-40MP).

[0287] <Phosphoric acid compounds>

[0288] Trioctyl phosphite,

[0289] Tris(2-ethylhexyl) phosphite,

[0290] Triisodecyl phosphite,

[0291] Trioleyl phosphite,

[0292] Trihexyl phosphite,

[0293] Tributyl phosphite,

[0294] Tris(1,1,1,3,3,3-hexafluoro-2-propyl) phosphite,

[0295] 3,9-Di(octadec-1-yl)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane.

[0296] (Particularly preferred compound among compound C)

[0297] The compound C is preferably selected from compounds represented by the formula (C1).

[0298] Ph 1 -X-(Ph 2 ) a … (C1)

[0299] Where a is 1 or 2, Ph 1 It is expressed by formula (C2):

[0300]

[0301] R 1 independently selected from the group consisting of alkyl groups having 1 to 5 carbon atoms excluding t-Bu groups, h is an integer of 1 to 3, i is an integer of 1 to 3, j is an integer of 0 to 3, h+i+j is 5 or less, and at least one t-Bu group must be present at the ortho position of at least one OH group,

[0302] Ph 2 It is expressed by formula (C3):

[0303]

[0304] m is an integer of 0 to 3, n is an integer of 0 to 3, p is an integer of 0 to 3, m+n+p is 5 or less, R 7 are independently selected from the group consisting of alkyl groups having 1 to 5 carbon atoms excluding t-Bu groups,

[0305] X is selected from -OC(=O)-, -(O=)CO-, -C(R 8 )2-, -S-, -O-, a divalent or trivalent aromatic hydrocarbon group having 6 to 14 carbon atoms constituting the ring, and a group consisting of the following formula,

[0306]

[0307] R 8 are independently selected from the group consisting of a hydrogen atom and an alkyl group having 1 to 5 carbon atoms,

[0308] The * in the structural formula indicates the bonding position.

[0309] About formula (C2)

[0310] At least one OH group may be arranged in the para position relative to the bonding position to X. h may be 1 or 2.

[0311] There may be one or two t-Bu groups in the ortho position to the OH group. i may be 1 or 2.

[0312] j can be 0 or 1. h+i+j can be 5 or less, 4 or less, 3 or less, or 3.

[0313] About formula (C3)

[0314] In the case where m=1 or more, preferably one or two t-Bu groups are present at the ortho position of at least one OH group. In the case where m=1 or more, at least one OH group may be arranged at the para position relative to the bonding position bonded to X. m may be 1 or 2. m+n+p may be 5 or less, 4 or less, 3 or less, or 3.

[0315] In the case of m=0, n may be 1 or more, or 2 or more. In the case of m=0, at least one t-Bu group may be present in the para position relative to the bonding position to X. n may be 2. m+n+p may be 5 or less, 4 or less, 3 or less, 2 or less, or 2.

[0316] (About X)

[0317] When m=0 in formula (C3), X is preferably -(O=)CO- among -OC(=O)- and -(O=)CO-.

[0318] In the aromatic hydrocarbon group of X, a hydrogen atom or a hydrocarbon group may be bonded to a carbon atom constituting the ring. The number of carbon atoms of the hydrocarbon group bonded to the carbon atom constituting the ring may be 1 to 5. The number of carbon atoms constituting the ring of the aromatic hydrocarbon group may be 6, in which case a=2, and the bonding position of (C2) may be bonded to the carbon atom at the 1 position of the benzene ring constituting X, and the bonding positions of (C2) and (C3) may be bonded to the carbon atoms at the 3 positions and 5 positions of the benzene ring constituting X.

[0319] Examples of the compound of formula (C1) are shown below.

[0320]

[0321] 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate (Sumisorb 400)

[0322]

[0323] 4,4'-Butylidenebis(6-tert-butyl-m-cresol)

[0324]

[0325] 4,4'-Thiobis(6-tert-butyl-m-cresol)

[0326]

[0327] 2,4,6-Tris(3',5'-di-tert-butyl-4'-hydroxybenzyl)-mesitylene

[0328]

[0329] Sumilizer GP (C104)

[0330] (When compound C is a mixture of two compounds)

[0331] When the composition contains two or more compounds C, the composition may contain a first compound (which may be one or more) having an MFR(X) / MFR(B) of 0.8 or less and a second compound (which may be one or more) having an MFR(X) / MFR(B) of greater than 0.8 and less than or equal to 1.0.

[0332] Examples of the first compound include compounds represented by formula (C1).

[0333] Examples of the second compound include Sumilizer GM, Sumilizer GS, Sumilizer GA80, Irganox 1010, Sumilizer GP, Sumilizer TP-D, Sumilizer TP-M, Irgafos 168, and Carbosista TCC-NP (cyclic carbodiimide).

[0334] It is also preferable to use two or more second compounds, and examples of such a combination include a combination of Sumilizer GA80 and Sumilizer TP-D, and a combination of Irganox 1010 and Sumilizer TP-D.

[0335] (Compound C' with MFR(X) / MFR(B) greater than 2.0)

[0336] The composition preferably does not comprise compounds C' having an MFR(X) / MFR(B) greater than 2.0, greater than 1.5 or greater than 1.0.

[0337] <Olefin polymer A>

[0338] The olefin polymer A is a polymer containing 50% by mass or more of a structural unit derived from an olefin having a carbon number of 2 or more and 10 or less (wherein the total amount of the olefin polymer is 100% by mass). Examples of the olefin having a carbon number of 2 or more and 10 or less include ethylene, propylene, 1-butene, 4-methyl-1-pentene, 1-hexene, 1-octene, and 1-decene.

[0339] The olefin polymer A may contain a structural unit derived from a monomer other than an olefin having a carbon number of 2 or more and 10 or less. Examples of monomers other than an olefin having a carbon number of 2 or more and 10 or less 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.

[0340] The olefin polymer A may be at least one selected from the group consisting of ethylene polymers, propylene polymers, and butene polymers, or a combination of any two or more thereof.

[0341] Ethylene copolymers are polymers containing 50% by mass or more of structural units derived from ethylene, and examples thereof include ethylene homopolymers, ethylene-1-butene copolymers, ethylene-1-hexene copolymers, ethylene-1-octene copolymers, and ethylene-1-butene-1-hexene copolymers. The ethylene copolymer may be a combination of two or more ethylene copolymers.

[0342] The propylene copolymer is a polymer containing more than 50% by mass of structural units derived from propylene, and examples thereof include propylene homopolymers, propylene-ethylene copolymers, propylene-1-butene copolymers, propylene-1-hexene copolymers, propylene-1-octene copolymers, propylene-ethylene-1-butene copolymers, propylene-ethylene-1-hexene copolymers, and propylene-ethylene-1-octene copolymers. The propylene copolymer can be a combination of two or more propylene copolymers. The olefin polymer A is preferably a propylene copolymer.

[0343] The butene copolymer is a polymer containing 50% by mass or more of a structural unit 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 copolymer may be a combination of two or more butene copolymers.

[0344] The olefin polymer A can be produced by a known polymerization method using a known polymerization catalyst.

[0345] The melt mass flow rate (MFR) of the olefin polymer A measured under the conditions of a temperature of 230° C. or 190° C. and a load of 2.16 kgf in accordance with JIS K7210-2014 is preferably 0.1 g / 10 min or more and 200 g / 10 min or less.

[0346] (additive)

[0347] The composition may contain additives as required. The additives may be at least one selected from the group consisting of stabilizers, antibacterial agents, mildew-proof agents, dispersants, plasticizers, flame retardants, tackifiers, colorants, metal powders, organic powders, inorganic fibers, organic fibers, organic and inorganic composite fibers, inorganic whiskers, and fillers.

[0348] Examples of stabilizers include at least one selected from the group consisting of lubricants, anti-aging agents, heat stabilizers, light stabilizers, weathering agents, metal deactivators, ultraviolet absorbers, light stabilizers, and copper inhibitors. Examples of light stabilizers include hindered amine light stabilizers.

[0349] Examples of the colorant include at least one selected from the group consisting of titanium oxide, carbon black, and organic pigments. Examples of the metal powder include ferrite.

[0350] Examples of organic powders include proteins. Examples of inorganic fibers include glass fibers and metal fibers. Examples of organic fibers include carbon fibers and aramid fibers. Examples of inorganic whiskers include potassium titanate whiskers.

[0351] Examples of the filler include at least one selected from the group consisting of glass beads, glass hollow microspheres, glass flakes, asbestos, mica, calcium carbonate, talc, silica, calcium silicate, hydrotalcite, kaolin, diatomaceous earth, graphite, pumice, hard rubber powder, cotton wool, cork powder, barium sulfate, fluorine-containing resin, cellulose powder and wood powder.

[0352] The composition may contain only one type of the above additives, or may contain a combination of two or more types.

[0353] <Composition of Composition I>

[0354] The content of compound C is 0.01 to 20 parts by mass relative to 100 parts by mass of the total of polymer B and compound C. The content of compound C may be 15 parts by mass or less, 10 parts by mass or less, 7 parts by mass or less, 5 parts by mass or less, 3 parts by mass or less, 2 parts by mass or less, or 1 part by mass or less.

[0355] The polymer B may account for more than 50% by mass of the composition I, and may account for 60% by mass or more, 70% by mass or more, 80% by mass or more, or 90% by mass or more.

[0356] The ratio of polymer B and compound C in the entire composition I can be 50 mass % or more, 60 mass % or more, 70 mass % or more, 80 mass % or more, 90 mass % or more, or 95 mass % or more.

[0357] The composition I may include an olefinic polymer A. The olefinic polymer A may account for 40% by mass or less, 30% by mass or less, 20% by mass or less, or 10% by mass or less of the composition I.

[0358] In the composition I, the olefin polymer A may form a dispersed phase, and the polymer B may form a continuous phase. The average equivalent circle diameter of the dispersed phase (island portion) may be 10 nm to 400 μm.

[0359] According to the composition I of this embodiment, the mechanical properties such as elastic modulus are excellent by including compound C. Examples of elastic modulus include bending elastic modulus and tensile elastic modulus. The reason is not clear, but it is believed that the thermal decomposition of the aliphatic polyester resin during melt kneading can be suppressed by using compound C.

[0360] In particular, when the composition I contains the compound C represented by the formula (C1), the effect is high.

[0361] (Composition II)

[0362] The composition II of the embodiment includes a polyolefin polymer A, a polymer B, and a compound C. The polymer B is an aliphatic polyester polymer.

[0363] The content of the compound C is 0.01 to 20 parts by mass based on 100 parts by mass of the total of the polymer A, the polymer B, and the compound C.

[0364] The compound C satisfies the following requirement 1.

[0365] Necessary condition 1: when the melt mass flow rate of the polymer B measured at a temperature of 210° C. and a load of 2.16 kgf is defined as MFR(B), and the melt mass flow rate of the mixture X measured at a temperature of 210° C. and a load of 2.16 kgf is defined as MFR(X), MFR(X) / MFR(B) is 2.0 or less, and the mixture X contains 0.5 parts by mass of the compound C relative to 100 parts by mass of the total of the polymer B and the compound C.

[0366] That is, the composition II of the present embodiment is different from the composition I in that the polyolefin polymer A is used as an essential component, and other than this, all matters described in the composition I are applicable to the composition II.

[0367] The differences from composition I are described below.

[0368] (About olefin polymer A)

[0369] In composition II, the content of olefin polymer A may be greater than 50 parts by mass, 60 parts by mass or more, 70 parts by mass or more, 80 parts by mass or more, or 90 parts by mass or more, relative to 100 parts by mass of the total of olefin polymer A and polymer B.

[0370] The proportion of polymer A, polymer B and compound C in the entire composition II may be 20 mass % or more, 30 mass % or more, 40 mass % or more, 50 mass % or more, 60 mass % or more, or 70 mass % or more.

[0371] The polymer A may account for more than 50% by mass of the composition II, and may account for 60% by mass or more, 70% by mass or more, 80% by mass or more, or 90% by mass or more.

[0372] (Compound C)

[0373] Similar to composition I, it is preferred to contain a first compound C having an MFR(X) / MFR(B) of 0.8 or less and a second compound C having an MFR(X) / MFR(B) of greater than 0.8 and equal to or less than 1.0.

[0374] Composition II also preferably does not contain compounds C' having an MFR(X) / MFR(B) greater than 2.0, greater than 1.5, greater than 1.0.

[0375] (Effect)

[0376] According to the composition II of the present embodiment, the mechanical properties are excellent by including the compound C. Examples of the mechanical properties include bending elastic modulus and tensile elongation. The reason is not clear, but it is believed that the thermal decomposition of not only the aliphatic polyester resin but also the olefin polymer can be suppressed by the compound C during melt kneading.

[0377] In composition II, the polymer B may form a dispersed phase, and the olefin polymer A may form a continuous phase. The average equivalent circle diameter of the dispersed phase (island portion) may be 10 nm to 400 μm.

[0378] (Method for producing composition)

[0379] Compositions I and II can be obtained by melt-kneading the respective raw material components.

[0380] The kneading temperature (set temperature of the kneading machine) is preferably set to 150° C. to 300° C., more preferably 170° C. to 280° C. Processing may also be performed at 210° C. or higher.

[0381] The composition I can be obtained by melt-kneading the polymer B, the compound C, additives added as necessary, the olefin polymer A, and the like.

[0382] The composition II can be produced by melt-kneading the olefin polymer A, the polymer B, the compound C and the additives added as required all at once.

[0383] Composition II can be produced by the following steps: first, a part of the olefin polymer A, the whole of the polymer B, a part or all of the compound C, and a part or all of the additives added as needed are melt-kneaded to produce a preliminary composition; then, a second step of melt-kneading the preliminary composition and the remaining part of the olefin polymer A, the remaining part of the compound C, and the remaining part of the additives added as needed. Olefin polymers may not be added at all in the first step.

[0384] When the compound C of the composition II contains a compound C having an MFR(X) / MFR(B) of 0.8 or less, it is preferred to add the compound C in the first step.

[0385] When compound C of composition II is a mixture of a first compound C having an MFR(X) / MFR(B) of less than 0.8 and a second compound C having an MFR(X) / MFR(B) of greater than 0.8 and less than or equal to 1.0, all of the first compound C and the second compound C may be added in the first step, or part or all of the first compound C may be added in the first step and part or all of the second compound C may be added in the second step.

[0386] (Method for producing molded article of composition)

[0387] A molded body of the composition having a desired shape can be obtained by using a known resin molding method such as injection molding, extrusion molding, vacuum molding, compressed air molding, press molding, foam molding, blow molding, rotational molding, or the like.

[0388] Furthermore, the above composition can be laminated with other materials such as other resins, metals, paper, leather, etc. to obtain a multilayer structure.

[0389] The surface of the molded article of the composition of the present invention may be subjected to a surface treatment. Examples of the surface treatment method include embossing treatment, corona discharge treatment, flame treatment, plasma treatment, and ozone treatment.

[0390] The above composition can be widely used as a resin material.

[0391] Examples of uses of the resin composition of the present invention include fiber materials, exterior structural members, furniture and interior decoration members, home appliance members, toy members, gardening members, automobile members, and packaging materials. Examples of the fiber material include clothing fabric members, interior fabric members, and industrial fiber members. Examples of the exterior structural members include garage members, fence members, door leaf members, door post members, column members, bicycle shed members, deck members, sunroom members, roof members, terrace members, handrail members, shading members, and canopy members. Examples of furniture and interior decoration members include sofa members, table members, chair members, bed members, wardrobe members, cabinet members, and dressing table members. Examples of home appliance members include watch members, mobile phone members, and white appliance members. Examples of toy members include plastic model members, three-dimensional model members, and video game console members. Examples of gardening members include flower trough members, vase members, and flower pot members. Examples of automobile members include bumper members, instrument panel members, and airbag cover members. Examples of packaging materials include food packaging materials, fiber packaging materials, and sundries packaging materials. In addition, examples of other uses include monitor parts, office automation (OA) equipment parts, medical parts, drain pans, toilet parts, bottles, containers, snow removal parts, and various building parts.

[0392] Example

[0393] The present invention will be described below using Examples and Comparative Examples. The olefin polymer A, aliphatic polyester polymer B, and compound C used in the Examples and Comparative Examples are shown below.

[0394] (1) Polymer A

[0395] (A-1) Propylene homopolymer

[0396] MFR (230°C, 2.16kg load): 7g / 10min

[0397] Melting point (Tm): 163°C

[0398] (2) Polymer B

[0399] (B-1) Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)

[0400] Structural formula: Formula (BI-3)

[0401] Content of comonomer (3HH) component (mol %): 0.4 mol %

[0402] Weight average molecular weight (Mw): 397800

[0403] MFR (190°C, 2.16kg load): 8g / 10min

[0404] MFR (B-1) (210°C, 2.16 kg load): 171 g / 10 min

[0405] Melting point (Tm): 175°C

[0406] (3) Compound C

[0407] (C-1) 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate

[0408] (Trade name) Sumisorb 400: manufactured by Sumika Chemtex Co., Ltd.

[0409] Cas No: 4221-80-1

[0410] Molecular weight: 438

[0411] MFR (X) (210°C, 2.16kg load): 104.9g / 10min

[0412] MFR(X) / MFR(B-1): 0.61

[0413] (C-2) 2,2-Bis[[3-(dodecylthio)-1-oxopropoxy]methyl]propane-1,3-diylbis[3-(dodecylthio)propionate]

[0414] (Trade name) Sumilizer TP-D: manufactured by Sumitomo Chemical Co., Ltd.

[0415] Cas No: 29598-76-3

[0416] Molecular weight: 1162

[0417] MFR (X) (210°C, 2.16kg load): 146.4g / 10min

[0418] MFR(X) / MFR(B-1): 0.86

[0419] (C-3) 2-[1-(2-hydroxy-3,5-di-tert-pentylphenyl)ethyl]-4,6-di-tert-pentylphenyl acrylate

[0420] (Trade name) Sumilizer GS: manufactured by Sumitomo Chemical Co., Ltd.

[0421] Cas No: 123968-25-2

[0422] Molecular weight: 549

[0423] MFR (X) (210°C, 2.16kg load): 162.2g / 10min

[0424] MFR(X) / MFR(B-1): 0.95

[0425] (C-4) Pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate)

[0426] (Trade name) Irganox 1010: Made by BASF Japan

[0427] Cas No: 6683-19-8

[0428] Molecular weight: 1178

[0429] MFR (X) (210°C, 2.16kg load): 149.5g / 10min

[0430] MFR(X) / MFR(B-1)v: 0.87

[0431] (C-5) 3,9-bis{2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)-propionyloxy]-1,1-dimethylethyl}-2,4,8,10-tetraoxaspiro[5.5]undecane

[0432] (Trade name) Sumilizer GA-80: manufactured by Sumitomo Chemical Co., Ltd.

[0433] Cas No: 90498-90-1

[0434] Molecular weight: 741

[0435] MFR (X) (210°C, 2.16kg load): 153.8g / 10min

[0436] MFR(X) / MFR(B-1): 0.90

[0437] (C-6) Bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate

[0438] (Trade name) Tinuvin 770DF: Made by BASF Japan

[0439] Cas No: 52829-07-9

[0440] Molecular weight: 481

[0441] MFR (X) (210°C, 2.16kg load): 403.4g / 10min

[0442] MFR(X) / MFR(B-1): 2.36

[0443] The physical properties of each polymer and composition were measured by the methods shown below.

[0444] (1) Melt flow rate (MFR, unit: g / 10 minutes)

[0445] The measurement was performed according to the method specified in JIS K7210-2014. The measurement temperature was set at 230° C., 210° C., or 190° C., and the load was set at 2.16 kg. The cylinder for melt kneading was made of metal, and the resin was not irradiated with light.

[0446] The above MFR(X) is the melt mass flow rate of the mixture X measured under the conditions of a temperature of 210° C. and a load of 2.16 kgf, wherein the mixture X contains 0.5 parts by mass of any one of the compounds C-1 to C-6 relative to 100 parts by mass of the total of the compounds C-1 to C-6 and the polymer B-1.

[0447] MFR(B-1) is the melt mass flow rate of the polymer B-1 measured under the conditions of a temperature of 210°C and a load of 2.16 kgf.

[0448] (2) Weight average molecular weight (Mw)

[0449] The weight average molecular weight (Mw) was calculated based on the measurement results of gel permeation chromatography (GPC). In the GPC measurement, GPC-150C manufactured by Waters was used as a measurement device, an o-dichlorobenzene solution with a polymer concentration of 0.05 wt %, a mixed polystyrene gel column (PSKgelGMH6-HT manufactured by Tosoh Corporation) was used as a column, and the measurement temperature was set to 135°C.

[0450] (3) Melting point of polymer (Tm)

[0451] The measurement was performed according to the method specified in JIS K7121. The measurement was performed under the conditions of a measurement temperature of -50°C to 200°C or -50°C to 250°C and a temperature increase rate of 10°C / min.

[0452] (4) Content of comonomer component of polymer B

[0453] The content of the comonomer component is the molar ratio of repeating units other than 3-hydroxybutyrate (3-hydroxyhexanoate (3HH) or 4-hydroxybutyrate (4HB)) relative to the total number of ester repeating units of hydroxyalkanoate in the polymer B.

[0454] The content of the comonomer component was determined by a method using 1H-NMR spectroscopy described in L. Tripathi., MC Factories, 11, 44 (2012).

[0455] [Measurement conditions]

[0456] Model: Bruker AVANCE600

[0457] Probe: 10mm low temperature probe

[0458] Measuring temperature: 135℃

[0459] Pulse repetition time: 1 second

[0460] Pulse width: 45°

[0461] Cumulative times: 700 times

[0462] Magnetic field strength: 600MHz

[0463] (5) Tensile elongation (UE)

[0464] Using an SI30III injection molding machine manufactured by Toyo Machinery & Metal Co., Ltd., injection molding was performed at a molding temperature of 220°C and a mold temperature of 50°C to obtain a tensile test piece with a thickness of 2 mm. Two parallel marking lines were marked in the center of the test piece at intervals of 25 mm in the longitudinal direction of the test piece and along the width direction of the test piece over the entire width. Then, the test piece was stretched along its longitudinal direction using a tensile testing machine at a temperature of 23°C and a stretching speed of 50 mm / min until the test piece broke. The tensile elongation (unit: %) defined as the ratio of the distance between the marking lines when the test piece broke to the initial distance between the marking lines (25 mm) was calculated.

[0465] (6) Flexural modulus (FM)

[0466] Injection molding was performed using an SI30III injection molding machine manufactured by Toyo Machinery & Metal Co., Ltd. at a molding temperature of 220°C and a mold temperature of 50°C to obtain a bending test piece having a thickness of 4 mm, a width of 10 mm, and a length of 80 mm. The measurement conditions were in accordance with JIS-K-7171, and the bending modulus (unit: MPa) at 23°C was measured.

[0467] (7) Tensile elastic modulus

[0468] The SI30III injection molding machine manufactured by Toyo Machinery & Metal Co., Ltd. was used to perform injection molding at a molding temperature of 220°C and a mold temperature of 50°C to obtain a tensile test piece with a thickness of 2 mm. The test piece was stretched in the longitudinal direction using a tensile testing machine at a temperature of 23°C and a tensile speed of 50 mm / min. The measurement conditions were in accordance with JIS-K-7139, and the tensile modulus (unit: MPa) was measured from the ratio of the tensile stress within the tensile ratio limit to the corresponding strain.

[0469] (Example A: Composition I)

[0470] (Example A1)

[0471] 99.9 mass % of the polymer (B-1) and 0.1 mass % of the compound (C-1) were mixed and melt-kneaded using a 15 mm twin-screw extruder KZW15-45MG (manufactured by Technovel) under the conditions of a barrel setting temperature of 165° C., a screw speed of 500 rpm, and an extrusion rate of about 4 kg / hour to obtain a resin composition (Q-1).

[0472] (Example A2)

[0473] A resin composition (Q-1) was obtained in the same manner as in Example A1 except that the polymer (B-1) was changed to 99.5 mass % and the compound (C-1) was changed to 0.5 mass %.

[0474] (Example A3)

[0475] A resin composition (Q-1) was obtained in the same manner as in Example A1 except that the polymer (B-1) was 99 mass % and the compound (C-1) was 1 mass %.

[0476] (Comparative Example A1)

[0477] A resin composition (Q-1) was obtained in the same manner as in Example A1 except that the polymer (B-1) was set to 100 mass % and the compound (C-1) was not added.

[0478] The tensile modulus and flexural modulus of the obtained resin composition were measured.

[0479] [Table 1]

[0480]

[0481] (Example B: Composition II)

[0482] (Example B1)

[0483] First step: 18.8 mass % of polymer (A-1), 80.0 mass % of polymer (B-1), 1.0 mass % of compound (C-1) and 0.2 mass % of compound (C-2) were mixed and melt-kneaded using a 15 mm twin-screw extruder KZW15-45MG (manufactured by Technovel) under the conditions of barrel setting temperature: 215° C., screw speed: 500 rpm, and extrusion amount: about 4 kg / hour, thereby obtaining a resin composition (Q-1).

[0484] Second step: 6.25 mass % of the resin composition (Q-1) and 93.75 mass % of the polymer (A-1) were mixed and melt-kneaded using a 15 mm twin-screw extruder KZW15-45MG (manufactured by Technovel) at a barrel setting temperature of 215° C., a screw speed of 500 rpm, and an extrusion rate of about 4 kg / hour to obtain a composition. The tensile elongation (UE) and flexural modulus (FM) of the composition were evaluated.

[0485] (Example B2)

[0486] In the second step, the same procedure as in Example 1 was carried out except that 6.25 mass % of the resin composition (Q-1), 93.75 mass % of the polymer (A-1), and 0.3 parts by mass of the compound (C-3) were mixed.

[0487] (Example B3)

[0488] In the second step, the same procedure as in Example 1 was carried out except that 6.25 mass % of the resin composition (Q-1), 93.75 mass % of the polymer (A-1), 0.3 mass parts of the compound (C-3), 0.9 mass parts of the compound (C-2), and 0.3 mass parts of the compound (C-4) were mixed.

[0489] (Comparative Example B1)

[0490] First step: 18.8 mass % of polymer (A-1) and 81.2 mass % of polymer (B-1) were mixed and melt-kneaded using a 15 mm twin-screw extruder KZW15-45MG (manufactured by Technovel) at a barrel setting temperature of 215° C., a screw speed of 500 rpm, and an extrusion rate of about 4 kg / hour to obtain a resin composition (Q-3).

[0491] Second step: The same procedure as in Example B1 was carried out except that 6.25 mass % of the resin composition (Q-3) and 93.75 mass % of the polymer (A-1) were mixed.

[0492] (Comparative Example B2)

[0493] First step: 19.0 mass % of polymer (A-1), 80.0 mass % of polymer (B-1) and 1.0 mass % of component (C-6) were mixed and melt-kneaded using a 15 mm twin-screw extruder KZW15-45MG (manufactured by Technovel) at a barrel setting temperature of 215° C., a screw speed of 500 rpm, and an extrusion rate of about 4 kg / hour to obtain a resin composition (Q-4).

[0494] Second step: The same procedure as in Example B1 was carried out except that 6.25 mass % of the resin composition (Q-4) and 93.75 mass % of the polymer (A-1) were mixed.

[0495] The final composition and evaluation results of each composition are shown in Table 2. MFR (X) in Table 2 is the melt mass flow rate of the mixture X measured under the conditions of a temperature of 210° C. and a load of 2.16 kgf, wherein the mixture X contains 0.5 parts by mass of any one of the compounds C-1 to C-4 relative to 100 parts by mass of the total of the compounds C-1 to C-4 and the polymer B-1.

[0496] MFR(B-1) is the melt mass flow rate of the polymer B-1 measured under the conditions of a temperature of 210°C and a load of 2.16 kgf.

[0497] [Table 2]

[0498]

Claims

1. A composition comprising a polymer B and a compound C, wherein: The polymer B is an aliphatic polyester polymer, The content of the compound C is 0.01 to 20 parts by mass relative to 100 parts by mass of the total of the polymer B and the compound C. The compound C satisfies the following necessary condition 1, Necessary condition 1: when the melt mass flow rate of the polymer B measured at a temperature of 210°C and a load of 2.16 kgf is defined as MFR(B), and the melt mass flow rate of the mixture X measured at a temperature of 210°C and a load of 2.16 kgf is defined as MFR(X), MFR(X) / MFR(B) is 2.0 or less, and the mixture X contains 0.5 parts by mass of the compound C relative to 100 parts by mass of the total of the polymer B and the compound C.

2. The composition according to claim 1, wherein In the above requirement 1, MFR(X) / MFR(B) is 0.8 or less.

3. The composition according to claim 1 or 2, wherein The compound C is selected from the compounds represented by formula (C1), Ph 1 -X-(Ph 2 ) a …(C1) Where a is 1 or 2, Ph 1 It is expressed by formula (C2): R 1 independently selected from the group consisting of alkyl groups having 1 to 5 carbon atoms excluding t-Bu groups, h is an integer of 1 to 3, i is an integer of 1 to 3, j is an integer of 0 to 3, h+i+j is 5 or less, and at least one t-Bu group must be present at the ortho position of at least one OH group, Ph 2 It is expressed by formula (C3): m is an integer of 0 to 3, n is an integer of 0 to 3, p is an integer of 0 to 3, m+n+p is 5 or less, R 7 are independently selected from the group consisting of alkyl groups having 1 to 5 carbon atoms excluding t-Bu groups, X is selected from -OC(=O)-, -(O=)CO-, -C(R 8 )2-, -S-, -O-, a divalent or trivalent aromatic hydrocarbon group having 6 to 14 carbon atoms constituting the ring, and a group consisting of the following formula, R 8 are independently selected from the group consisting of a hydrogen atom and an alkyl group having 1 to 5 carbon atoms, The * in the structural formula indicates the bonding position.

4. The composition according to any one of claims 1 to 3, wherein The composition includes a first compound C having an MFR(X) / MFR(B) ratio of 0.8 or less and a second compound C having an MFR(X) / MFR(B) ratio of greater than 0.8 and less than or equal to 1.

0.

5. The composition according to any one of claims 1 to 4, wherein The polymer B accounts for more than 50% by mass.

6. The composition according to any one of claims 1 to 5, wherein The polymer B is a poly(3-hydroxyalkanoate) polymer having a melting point of 150° C. or higher.

7. The composition according to any one of claims 1 to 6, wherein The molecular weight of the compound C is 5000 or less.

8. A composition comprising a polyolefin polymer A, a polymer B and a compound C, wherein: The polymer B is an aliphatic polyester polymer, The content of the compound C is 0.01 to 20 parts by mass relative to 100 parts by mass of the total of the polymer A, the polymer B, and the compound C. The compound C satisfies the following necessary condition 1, Necessary condition 1: when the melt mass flow rate of the polymer B measured at a temperature of 210°C and a load of 2.16 kgf is defined as MFR(B), and the melt mass flow rate of the mixture X measured at a temperature of 210°C and a load of 2.16 kgf is defined as MFR(X), MFR(X) / MFR(B) is 2.0 or less, and the mixture X contains 0.5 parts by mass of the compound C relative to 100 parts by mass of the total of the polymer B and the compound C.

9. The composition according to claim 8, wherein In the above requirement 1, MFR(X) / MFR(B) is 0.8 or less.

10. The composition according to claim 8 or 9, wherein The compound C is selected from the compounds represented by formula (C1), Ph 1 -X-(Ph 2 ) a …(C1) Where a is 1 or 2, Ph 1 It is expressed by formula (C2): R 1 independently selected from the group consisting of alkyl groups having 1 to 5 carbon atoms excluding t-Bu groups, h is an integer of 1 to 3, i is an integer of 1 to 3, j is an integer of 0 to 3, h+i+j is 5 or less, and at least one t-Bu group must be present at the ortho position of at least one OH group, Ph 2 It is expressed by formula (C3): m is an integer of 0 to 3, n is an integer of 0 to 3, p is an integer of 0 to 3, m+n+p is 5 or less, R 7 are independently selected from the group consisting of alkyl groups having 1 to 5 carbon atoms excluding t-Bu groups, X is selected from -OC(=O)-, -(O=)CO-, -C(R 8 )2-, -S-, -O-, a divalent or trivalent aromatic hydrocarbon group having 6 to 14 carbon atoms constituting the ring, and a group consisting of the following formula, R 8 are independently selected from the group consisting of a hydrogen atom and an alkyl group having 1 to 5 carbon atoms, The * in the structural formula indicates the bonding position.

11. The composition according to any one of claims 8 to 10, wherein The composition includes a first compound C having an MFR(X) / MFR(B) ratio of 0.8 or less and a second compound C having an MFR(X) / MFR(B) ratio of greater than 0.8 and less than or equal to 1.

0.

12. The composition according to any one of claims 8 to 11, wherein The composition includes more than 50 parts by mass of the olefin polymer A, based on 100 parts by mass of the total of the polyolefin polymer A and the polymer B.

13. The composition according to any one of claims 8 to 12, wherein The polymer B is a poly(3-hydroxyalkanoate) polymer having a melting point of 150° C. or higher.

14. The composition according to any one of claims 8 to 13, wherein The molecular weight of the compound C is 5000 or less.

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