JP5712069B2 - Thermoplastic polymer composition and processing stabilizer - Google Patents

Description

  The present invention relates to a thermoplastic polymer composition excellent in processing stability and a method for producing the same. The invention further relates to a processing stabilizer.

  Thermoplastic polymers are widely used in food packaging containers, daily miscellaneous goods, and the like because of their excellent transparency and impact resistance. In the manufacture of such products, the thermoplastic polymer is used as a composition containing additives. As an additive for thermoplastic polymers, 6- [3- (3-t-butyl-4-hydroxy-5-methylphenyl) propoxy] -2,4,8,10-tetra-t-butyldibenz [d, f ] [1,3,2] dioxaphosphine (this is 6-t-butyl-4- [3-[(2,4,8,10-tetra-t-butyldibenzo [d, f] [1 , 3,2] dioxaphosphin-6-yl) oxy] propyl] -2-methylphenol) and the like are known (Patent Document 1).

JP-A-10-273494

  A thermoplastic polymer composition with further improved processing stability is desired.

  As a result of intensive studies by the present inventors to solve the above problems, a thermoplastic polymer composition containing a compound represented by the following formula (1), maltitol and a thermoplastic polymer has excellent processing stability. It was found to show sex. Based on such findings, the inventors have reached the inventions described in [1] to [10] below.

  [1] Formula (1):

[In Formula (1),
Each R ¹ , each R ² , R ⁴ and R ⁵ independently represents a hydrogen atom, a C _1-8 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 Represents an aralkyl group or a phenyl group.
Each R ³ independently represents a hydrogen atom or a C _1-8 alkyl group.
L ¹ represents a single bond, a sulfur atom, or formula (1a):

{In Formula (1a), R ⁶ represents a hydrogen atom, a C _1-8 alkyl group or a C _5-8 cycloalkyl group. } Represents a divalent group.
L ² represents a C _2-8 alkylene group or formula (1b):

{In Formula (1b), L ³ represents a single bond or a C _1-8 alkylene group. * Represents bonding to the oxygen atom side. } Represents a divalent group.
One of Z ¹ and Z ² represents a hydroxy group, a C _1-8 alkyl group, a C _1-8 alkoxy group or a C _7-12 aralkyloxy group, and the other represents a hydrogen atom or a C _1-8 alkyl group Represents. ]
A thermoplastic polymer composition comprising a compound represented by the formula: maltitol and a thermoplastic polymer.
[2] The thermoplastic polymer composition according to the above [1], wherein the total amount of the compound represented by the formula (1) and maltitol is 0.001 to 3 parts by mass with respect to 100 parts by mass of the thermoplastic polymer.
[3] Formula (1):

[In Formula (1),
Each R ¹ , each R ² , R ⁴ and R ⁵ independently represents a hydrogen atom, a C _1-8 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 Represents an aralkyl group or a phenyl group.
Each R ³ independently represents a hydrogen atom or a C _1-8 alkyl group.
L ¹ represents a single bond, a sulfur atom, or formula (1a):

{In Formula (1a), R ⁶ represents a hydrogen atom, a C _1-8 alkyl group or a C _5-8 cycloalkyl group. } Represents a divalent group.
L ² represents a C _2-8 alkylene group or formula (1b):

{In Formula (1b), L ³ represents a single bond or a C _1-8 alkylene group. * Represents bonding to the oxygen atom side. } Represents a divalent group.
One of Z ¹ and Z ² represents a hydroxy group, a C _1-8 alkyl group, a C _1-8 alkoxy group or a C _7-12 aralkyloxy group, and the other represents a hydrogen atom or a C _1-8 alkyl group Represents. ]
The processing stabilizer characterized by containing the compound shown by these, and maltitol.
[4] The compound represented by the formula (1) is 6- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propoxy] -2,4,8,10-tetra-tert-butyldibenz. [D, f] [1, 3, 2] The processing stabilizer according to the above [3], which is dioxaphosphine.
[5] The processing stabilizer according to the above [3] or [4], wherein the content of maltitol is 0.1 to 95% by mass in the total of the compound represented by formula (1) and maltitol.
[6] Furthermore, the formula (2):

[In Formula (2),
Each R ⁷ and each R ⁸ each independently represents a hydrogen atom or a C _1-6 alkyl group.
L ⁴ represents an n-valent C _1-24 alcohol residue which may contain a hetero atom, and n represents an integer of 1 to 4. Here, the alcohol residue represents the remaining group obtained by removing a hydrogen atom from the hydroxy group of the alcohol. ]
The processing stabilizer as described in any one of the above [3] to [5], which contains a compound represented by the formula:
[7] The processing stabilizer according to any one of [3] to [6], further comprising at least one selected from the group consisting of compounds represented by formulas (3) to (7): .

[In the formula (3), each R ⁹ and each R ¹⁰ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _{7- 12} represents an aralkyl group or a phenyl group. ]

[In the formula (4), each R ¹¹ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 aralkyl group or Represents a phenyl group. ]

[In the formula (5), each R ¹² independently represents a C _1-18 alkyl group, or a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, and a C _{7. 12} represents a phenyl group which may be substituted with at least one selected from the group consisting of _-12 aralkyl groups. ]

[In Formula (6),
Each R ¹³ and each R ¹⁴ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 aralkyl group or a phenyl group. Represent.
Each L ⁵ independently represents a single bond, a sulfur atom, or formula (6a):

{In Formula (6a), R ¹⁵ and R ¹⁶ each independently represent a hydrogen atom or a C _1-7 alkyl group on condition that the total number of carbon atoms is 7 or less. } Represents a divalent group.
Each L ⁶ independently represents a C _2-8 alkylene group. ]

[In Formula (7),
Each R ¹⁷ and each R ¹⁸ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 aralkyl group or a phenyl group. Represent.
R ¹⁹ is a C _1-8 alkyl group, or at least one selected from the group consisting of a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, and a C _7-12 aralkyl group. Represents an optionally substituted phenyl group.
L ⁷ represents a single bond, a sulfur atom, or the formula (7a):

{In Formula (7a), R ²⁰ and R ²¹ each independently represent a hydrogen atom or a C _1-7 alkyl group, provided that the total number of carbon atoms is 7 or less. } Represents a divalent group. ]
[8] The processing stabilizer according to any one of [3] to [6], further comprising a compound represented by the formula (3).

[In the formula (3), each R ⁹ and each R ¹⁰ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _{7- 12} represents an aralkyl group or a phenyl group. ]
[9] A method for producing a thermoplastic polymer composition, comprising mixing the processing stabilizer according to any one of [3] to [8] and a thermoplastic polymer.
[10] Use of the processing stabilizer according to any one of the above [3] to [8] for improving the processing stability of the thermoplastic polymer composition.

  If the compound represented by formula (1) and maltitol are used in combination, the processing stability of the thermoplastic polymer composition can be improved.

Hereinafter, the present invention will be described in order. In the present invention, “C _ab ” means that the carbon number is a to b. Hereinafter, the “compound represented by the formula (1)” or the like may be abbreviated as “compound (1)” or the like. Similarly, “a divalent group represented by the formula (1a)” or the like may be abbreviated as “a divalent group (1a)” or the like.

  The thermoplastic polymer composition of the present invention is characterized by containing the processing stabilizer of the present invention (that is, compound (1) and maltitol). In the following, the processing stabilizer will be described first, and then the thermoplastic polymer composition will be described.

  One feature of the processing stabilizer of the present invention is that it contains the compound (1). Only 1 type may be used for a compound (1) and it may use 2 or more types together. Hereinafter, the compound (1) will be described in order.

R ¹ , R ² , R ⁴ and R ⁵ in formula (1) are each independently a hydrogen atom, a C _1-8 alkyl group, a C _5-8 cycloalkyl group, or a C _6-12 alkyl cycloalkyl. Represents a group, a C _7-12 aralkyl group or a phenyl group. There are two R ^{1 s,} but each R ¹ may be the same as or different from each other, preferably the same. The same applies to each R ² .

The C _1-8 alkyl group may be linear or branched. The carbon number of the C _1-8 alkyl group is preferably 1 or more and 5 or less. Examples of the C _1-8 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 t-butyl group, a t-pentyl group, and an isooctyl group (6-methyl group). A heptyl group), a t-octyl group (also referred to as a 1,1,3,3-tetramethylbutyl group), a 2-ethylhexyl group, and the like.

_{Examples of the} C _5-8 cycloalkyl group include a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, and a cyclooctyl group.

Examples of the C _6-12 alkylcycloalkyl group include a 1-methylcyclopentyl group, a 2-methylcyclopentyl group, a 1-methylcyclohexyl group, a 2-methylcyclohexyl group, and a 1-methyl-4-isopropylcyclohexyl group. .

Examples of the C _7-12 aralkyl group include a benzyl group, an α-methylbenzyl group (also referred to as 1-phenylethyl group), an α, α-dimethylbenzyl group (a 1-methyl-1-phenylethyl group or a cumyl group). For example).

Each R ¹ and R ⁴ is preferably independently a C _1-8 alkyl group (more preferably a C _4-8 alkyl group having a tertiary carbon atom) or a C _5-8 cycloalkyl group (more preferably A cyclohexyl group) or a C _6-12 alkylcycloalkyl group (more preferably a 1-methylcyclohexyl group). As the C _4-8 alkyl group having a tertiary carbon atom, a t-butyl group, a t-pentyl group, and a t-octyl group are more preferable.

Each R ² is independently preferably a C _1-8 alkyl group, a C _5-8 cycloalkyl group or a C _6-12 alkylcycloalkyl group, more preferably a C _1-5 alkyl group. The C _1-5 alkyl group may be linear or branched. _{Examples of the} C _1-5 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 t-butyl group, and a t-pentyl group. Each R ² is independently, more preferably a methyl group, t- butyl group or a t-pentyl group.

R ⁵ is preferably a hydrogen atom or a C _1-5 alkyl group, more preferably a hydrogen atom or a methyl group. As the C _1-5 alkyl group for R ⁵ include those described above.

Each R ³ in Formula (1) independently represents a hydrogen atom or a C _1-8 alkyl group. There are two R ^{3 s,} but each R ³ may be the same or different from each other, preferably the same. Each R ³ is preferably a hydrogen atom or a C _1-5 alkyl group, more preferably a methyl group or a hydrogen atom. As the C _1-8 alkyl group and a C _1-5 alkyl group R ³ include those described above.

L ¹ in formula (1) represents a single bond, a sulfur atom or a divalent group represented by formula (1a), and R ⁶ in formula (1a) represents a hydrogen atom, a C _1-8 alkyl group or C _5-8 represents a cycloalkyl group. R ⁶ is preferably a hydrogen atom or a C _1-5 alkyl group. _Examples of the C _1-8 alkyl group, C _1-5 alkyl group, and C _5-8 cycloalkyl group represented by R ⁶ include those described above. L ¹ is preferably a single bond or a divalent group (1a), more preferably a single bond.

L ² in formula (1) represents a C _2-8 alkylene group or a divalent group represented by formula (1b), and L ³ in formula (1b) represents a single bond or a C _1-8 alkylene group. Represents. Both the C _2-8 alkylene group and the C _1-8 alkylene group may be linear or branched. Examples of the C _2-8 alkylene group include an ethylene group, a propylene group (—CH (CH ₃ ) CH ₂ —, —CH ₂ CH (CH ₃ ) —), a trimethylene group, a tetramethylene group, a pentamethylene group, and a hexamethylene group. Examples include a methylene group, an octamethylene group, and a 2,2-dimethyl-1,3-propylene group. Examples of the C _1-8 alkylene group include a methylene group and the aforementioned C _2-8 alkylene group.

L ² is preferably a C _2-8 alkylene group, a divalent group (1b) in which L ³ is a single bond (ie, a carbonyl group), or a divalent group (1b) in which L ³ is an ethylene group. _Yes ; more preferably a C _2-8 alkylene group; still more preferably a trimethylene group.

In Formula (1), any ^one of Z ¹ and Z ² represents a hydroxy group, a C _1-8 alkyl group, a C _1-8 alkoxy group or a C _7-12 aralkyloxy group, and the other represents a hydrogen atom or C _1-8 represents an alkyl group. As the C _1-8 alkyl group of Z ¹ and Z ² include those described above.

The C _1-8 alkoxy group may be linear or branched. Examples of the C _1-8 alkoxy group include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, a butoxy group, an isobutoxy group, a sec-butoxy group, a t-butoxy group, a t-pentyloxy group, and an isooctyloxy group. (Also referred to as 6-methylheptyloxy group), t-octyloxy group (also referred to as 1,1,3,3-tetramethylbutyloxy group), 2-ethylhexyloxy group and the like.

Examples of the C _7-12 aralkyloxy group include benzyloxy group, α-methylbenzyloxy group, α, α-dimethylbenzyloxy group and the like.

It is preferable that ^one of Z ¹ and Z ² is a hydroxy group and the other is a hydrogen atom.

As a preferable combination of the substituents, R ¹ and R ⁴ are each independently a C _4-8 alkyl group, cyclohexyl or 1-methylcyclohexyl group having a tertiary carbon atom, and each R ² is independently _Are each a C _1-5 alkyl group, each R ³ is independently a hydrogen atom or a C _1-5 alkyl group, R ⁵ is a hydrogen atom or a C _1-5 alkyl group, and L ¹ is a single bond And a combination in which L ² is a C _2-8 alkylene group, one of Z ¹ and Z ² is a hydroxy group, and the other is a hydrogen atom. In this preferred combination, each R ¹ is more preferably the same as each other. The same applies to each R ² and each R ³ . In this preferred combination, R ¹ , R ³ and R ⁴ are more preferably t-butyl group or t-pentyl group (particularly t-butyl group) in common.

  Examples of the compound (1) include 6- [3- (3-t-butyl-4-hydroxy-5-methylphenyl) propoxy] -2,4,8,10-tetra-t-butyldibenz [d, f ] [1,3,2] dioxaphosphine, 2,10-dimethyl-4,8-di-t-butyl-6- [3- (3,5-di-t-butyl-4-hydroxyphenyl) ) Propoxy] -12H-dibenzo [d, g] [1,3,2] dioxaphosphocin, 2,4,8,10-tetra-t-butyl-6- [3- (3,5-di-) t-butyl-4-hydroxyphenyl) propoxy] dibenzo [d, f] [1,3,2] dioxaphosphine, 2,4,8,10-tetra-t-pentyl-6- [3- ( 3,5-di-tert-butyl-4-hydroxyphenyl) propoxy] -12-methyl 12H-dibenzo [d, g] [1,3,2] dioxaphosphocin, 2,10-dimethyl-4,8-di-t-butyl-6- [3- (3,5-di-t- Butyl-4-hydroxyphenyl) propionyloxy] -12H-dibenzo [d, g] [1,3,2] dioxaphosphocine, 2,4,8,10-tetra-t-pentyl-6- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxy] -12-methyl-12H-dibenzo [d, g] [1,3,2] dioxaphosphocin, 2,4,8, 10-tetra-t-butyl-6- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxy] -dibenzo [d, f] [1,3,2] dioxaphosphine Pin, 2,10-dimethyl-4,8-di-t-butyl-6- 3,5-di-t-butyl-4-hydroxybenzoyloxy) -12H-dibenzo [d, g] [1,3,2] dioxaphosphocin, 2,4,8,10-tetra-t-butyl -6- (3,5-di-tert-butyl-4-hydroxybenzoyloxy) -12-methyl-12H-dibenzo [d, g] [1,3,2] dioxaphosphocin, 2,10-dimethyl -4,8-di-t-butyl-6- [3- (3-methyl-4-hydroxy-5-t-butylphenyl) propoxy] -12H-dibenzo [d, g] [1,3,2] Dioxaphosphocin, 2,4,8,10-tetra-t-butyl-6- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propoxy] -12H-dibenzo [d, g ] [1,3,2] dioxaphosphocin, 2,10-diethyl -4,8-di-t-butyl-6- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propoxy] -12H-dibenzo [d, g] [1,3,2] Dioxaphosphocin, 2,4,8,10-tetra-tert-butyl-6- [2,2-dimethyl-3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propoxy] -dibenzo [D, f] [1, 3, 2] dioxaphosphine etc. are mentioned.

  Among the compounds (1), 6- [3- (3-t-butyl-4-hydroxy-5-methylphenyl) propoxy] -2,4,8,10-tetra-t-butyldibenz [d, f] [ 1,3,2] dioxaphosphepine (hereinafter sometimes abbreviated as “compound (1-1)”) is preferred. Compound (1-1) is commercially available as “Sumilyzer (registered trademark) GP” (manufactured by Sumitomo Chemical Co., Ltd.).

  Compound (1) may be a commercially available product, or can be produced according to a known method (for example, the method described in Patent Document 1).

  One feature of the processing stabilizer of the present invention is that it contains maltitol. Maltitol may be either an anhydride or a hydrate. Maltitol is commercially available from, for example, Tokyo Chemical Industry Co., Ltd., and a commercially available product can be used as it is.

  The content of maltitol in the processing stabilizer of the present invention is preferably 0.1% by mass or more (more preferably 1% by mass or more, more preferably 2% by mass or more) in the total of compound (1) and maltitol. , Particularly preferably 5% by mass or more), preferably 95% by mass or less (more preferably 90% by mass or less, further preferably 75% by mass or less, particularly preferably 50% by mass or less).

  The processing stabilizer of the present invention may be composed of the compound (1) and maltitol, or may contain other components. For example, the processing stabilizer of the present invention may further contain a compound (2). Only one type of compound (2) may be used, or two or more types may be used in combination. Hereinafter, the compound (2) will be described in order.

Each R ⁷ and each R ^{8 in} formula (2) each independently represents a hydrogen atom or a C _1-6 alkyl group. When n is 2 or more, each R ⁷ may be the same as or different from each other, preferably the same. The same applies to each R ⁸ . The C _1-6 alkyl group may be either chain or cyclic, and the chain may be either linear or branched. Examples of the C _1-6 alkyl group include a linear C _1-6 alkyl group (methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group), branched C _3-6 alkyl group (for example, , Isopropyl group, isobutyl group, t-butyl group, isopentyl group, t-pentyl group, t-hexyl group), cyclic C _3-6 alkyl group (ie C _3-6 cycloalkyl group such as cyclopentyl group, cyclohexyl group) ). Each R ⁷ and each R ⁸ are independently preferably a linear C _1-6 alkyl group or a branched C _3-6 alkyl group, more preferably a methyl group or a t-butyl group. More preferably, each R ⁷ and each R ⁸ are all t-butyl groups.

L ⁴ in the formula (2) represents an n-valent C _1-24 alcohol residue which may contain a hetero atom, and n represents an integer of 1 to 4. Examples of the hetero atom include an oxygen atom, a sulfur atom, and a nitrogen atom, and these hetero atoms may be replaced with carbon atoms in the n-valent C _1-24 alcohol residue. That is, the n-valent C _1-24 alcohol residue represents —O—, —S—, —NR— (wherein R represents a hydrogen atom or another substituent (eg, a C _1-6 alkyl group)). ) And the like. As a hetero atom, an oxygen atom is preferable.

The n-valent C _1-24 alcohol residue (n = 1 to 4) may be linear or cyclic, or a combination thereof. The chain may be linear or branched.

Examples of monovalent C _1-24 alcohol residues include methanol, ethanol, propanol, isopropanol, butanol, t-butanol, hexanol, octanol, decanol, dodecanol, tetradecanol, hexadecanol, octadecanol and the like. Residue.

Examples of the divalent C _1-24 alcohol residue include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6- Hexanediol, 1,8-octanediol, 1,10-decanediol, 1,12-dodecanediol, 1,14-tetradecanediol, 1,16-hexadecanediol, diethylene glycol, triethylene glycol, 3,9-bis ( And residues such as 1,1-dimethyl-2-hydroxyethyl) -2,4,8,10-tetraoxaspiro [5.5] undecane.

Examples of the trivalent C _1-24 alcohol residue include residues such as glycerol.

_{Examples of the} tetravalent C _1-24 alcohol residue include residues such as erythritol and pentaerythritol.

  Examples of the compound (2) include 3- (3,5-di-t-butyl-4-hydroxyphenyl) propionic acid and 3- (3-t-butyl-4-hydroxy-5-methylphenyl) propionic acid. Or esters of 3- (3,5-dicyclohexyl-4-hydroxyphenyl) propionic acid with mono- or polyhydric alcohols. Examples of the monohydric or polyhydric alcohol include methanol, ethanol, octanol, octadecanol, ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, 1,9. -Nonanediol, neopentyl glycol, diethylene glycol, thioethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N'-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3- Thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo [2,2,2] octane, 3,9-bis (1,1- Dimethyl-2-hydroxy Ethyl) -2,4,8,10 such tetraoxaspiro [5.5] undecane and mixtures thereof.

  Preferred compound (2) is octadecyl 3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate (hereinafter sometimes abbreviated as “compound (2-1)”), 3,9-bis. [2- {3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy} -1,1-dimethylethyl] -2,4,8,10-tetraoxaspiro [5.5] Undecane (hereinafter sometimes abbreviated as “compound (2-2)”) and pentaerythritol tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] (hereinafter “compound (2- 3) ". Compound (2-1) is “Irganox (registered trademark) 1076” (manufactured by BASF), compound (2-2) is “Smilizer (registered trademark) GA-80” (manufactured by Sumitomo Chemical), compound ( 2-3) is commercially available as “Irganox (registered trademark) 1010” (manufactured by BASF).

  Compound (2) may be a commercially available product, or may be produced according to a known method (for example, the method described in US Pat. No. 3,330,859, US Pat. No. 3,644,482 or JP-A-59-25826). Can do.

  The processing stabilizer of the present invention may further contain at least one selected from the group consisting of compound (3) to compound (7). As for compound (3)-compound (7), all may use only 1 type and may use 2 or more types together. Hereinafter, the compound (3) to the compound (7) will be described in order.

In the formula (3), each R ⁹ and each R ¹⁰ independently represent a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 Represents an aralkyl group or a phenyl group. There are three R ^{9 s} , and each R ⁹ may be the same as or different from each other, preferably the same. The same applies to each R ¹⁰ . The positions of R ⁹ and R ¹⁰ are preferably the 2nd and 4th positions.

The C _1-9 alkyl group may be linear or branched. The carbon number of the C _1-9 alkyl group is preferably 3 or more and 5 or less. Examples of the C _1-9 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 t-butyl group, a pentyl group, a t-pentyl group, and 2-ethylhexyl. Group, nonyl group and the like. _Examples of the C _5-8 cycloalkyl group, C _6-12 alkylcycloalkyl group, and C _7-12 aralkyl group of R ⁹ and R ¹⁰ include those described above.

Each R ⁹ and each R ¹⁰ are independently preferably a hydrogen atom or a C _1-9 alkyl group, more preferably a hydrogen atom, a t-butyl group or a nonyl group, and still more preferably a t-butyl group.

  Examples of the compound (3) include tris (2,4-di-t-butylphenyl) phosphite (hereinafter sometimes abbreviated as “compound (3-1)”), triphenyl phosphite, tris (4 -Nonylphenyl) phosphite, tris (2,4-dinonylphenyl) phosphite and the like. Among these, the compound (3-1) is preferable. The compound (3-1) is commercially available as “Irgaphos (registered trademark) 168” (manufactured by BASF).

Each R ¹¹ in formula (4) is independently a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 aralkyl group or phenyl. Represents a group. There are four R ^{11 s} , and each R ¹¹ may be the same as or different from each other, preferably the same. _Examples of the C _1-9 alkyl group, the C _5-8 cycloalkyl group, the C _6-12 alkylcycloalkyl group, and the C _7-12 aralkyl group of R ¹¹ include those described above. Each R ¹¹ is independently a hydrogen atom or a C _1-9 alkyl group, more preferably a hydrogen atom.

  Examples of the compound (4) include tetrakis (2,4-di-t-butylphenyl) -4,4-biphenylenediphosphonite (hereinafter sometimes abbreviated as “compound (4-1)”), tetrakis. (2,4-di-t-butyl-5-methylphenyl) -4,4-biphenylenediphosphonite (hereinafter sometimes abbreviated as “compound (4-2)”). Among these, the compound (4-1) is preferable. Compound (4-1) is “Sandstub (registered trademark) P-EPQ” (manufactured by Clariant), and Compound (4-2) is “Yosinox (registered trademark) GSY-P101” (manufactured by API) It is commercially available.

Each R ¹² in the formula (5) independently represents a C _1-18 alkyl group or a phenyl group. The phenyl group of R ¹² is at least one selected from the group consisting of a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, and a C _7-12 aralkyl group as a substituent. You may have. In addition, the above-mentioned thing is mentioned as a substituent of these phenyl groups. Two R ¹² exist, and each R ¹² may be the same as or different from each other, preferably the same.

The C _1-18 alkyl group may be linear or branched. The carbon number of the C _1-18 alkyl group is preferably 12 or more and 18 or less. Examples of the C _1-18 alkyl group include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, t-butyl group, hexyl group, octyl group, decyl group, dodecyl group, tetradecyl group, hexadecyl group. Group, octadecyl group and the like.

_{Examples of the} phenyl group substituted with a C _1-9 alkyl group include 2-methylphenyl group, 4-methylphenyl group, 2-t-butylphenyl group, 4-t-butylphenyl group, 2-nonylphenyl group, 4-nonylphenyl group, 2,4-di-t-butylphenyl group, 2,4-di-nonylphenyl group, 2,6-di-t-butylphenyl group, 2-t-butyl-4-methylphenyl Group, 2-t-butyl-4-ethylphenyl group, 2,5-di-t-butylphenyl group, 2,6-di-t-butyl-4-methylphenyl group and the like.

_{Examples of the} phenyl group substituted with a C _5-8 cycloalkyl group include a 2-cyclopentylphenyl group, a 2-cyclohexylphenyl group, a 4-cyclohexylphenyl group, and a 2,4-dicyclohexylphenyl group.

_{Examples of the} phenyl group substituted with a C _6-12 alkylcycloalkyl group include 2- (2-methylcyclohexyl) phenyl group, 4- (2-methylcyclohexyl) phenyl group, 2,4-di- (2-methyl). (Cyclohexyl) phenyl group and the like.

Examples of the phenyl group substituted with a C _7-12 aralkyl group include a 2-benzylphenyl group, a 2-cumylphenyl group, a 4-cumylphenyl group, and a 2,4-dicumylphenyl group.

_{Examples of the} phenyl group substituted with a C _1-9 alkyl group and a C _5-8 cycloalkyl group include a 2-methyl-4-cyclohexylphenyl group. _{Examples of the} phenyl group substituted with a C _1-9 alkyl group and a C _6-12 alkylcycloalkyl group include 2-methyl-4- (2-methylcyclohexyl) phenyl group. _{Examples of the} phenyl group substituted with a C _1-9 alkyl group and a C _7-12 aralkyl group include a 2-benzyl-4-methylphenyl group.

Each R ¹² is preferably independently an octadecyl group (also referred to as a stearyl group), a 2,6-di-t-butyl-4-methylphenyl group, a 2,4-di-t-butylphenyl group, or 2 , 4-Dicumylphenyl group.

  Examples of the compound (5) include bis (2,6-di-t-butyl-4-methylphenyl) pentaerythritol diphosphite (hereinafter sometimes abbreviated as “compound (5-1)”), bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite (hereinafter sometimes abbreviated as “compound (5-2)”), bis (2,4-dicumylphenyl) pentaerythritol diphosphite (Hereinafter sometimes abbreviated as “compound (5-3)”), distearyl pentaerythritol diphosphite (hereinafter sometimes abbreviated as “compound (5-4)”), diisodecyl pentaerythritol diphosphite, Bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite, bis (2,4-di-t-butyl-6-methylpheny ) Pentaerythritol diphosphite, bis (2,4,6-tri -t- butyl phenyl) pentaerythritol phosphite. Among these, the compound (5-1), the compound (5-2), and the compound (5-3) are preferable. The compound (5-1) is “ADK STAB (registered trademark) PEP-36” (manufactured by Adeka), the compound (5-2) is “Ultranox (registered trademark) 626” (manufactured by GE Plastics), and the compound ( 5-3) is commercially available as “Doverfos S9228T” (manufactured by Dover Chemical), and compound (5-4) is commercially available as “Adekastab (registered trademark) PEP-8” (manufactured by Adeka).

In formula (6), each R ¹³ and each R ¹⁴ are independently a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 Represents an aralkyl group or a phenyl group. _Examples of the C ¹³ alkyl group, C _5-8 cycloalkyl group, C _6-12 alkyl cycloalkyl group and C _7-12 aralkyl group of R ¹³ and R ¹⁴ include those described above. Although there are six R ^{13 s} , each R ¹³ may be the same as or different from each other, preferably the same. The same applies to each R ¹⁴ . The positions of R ¹³ and R ¹⁴ are preferably the 3rd and 5th positions when the position of the carbon atom of the benzene ring to which L ⁵ is bonded is the 1st position, respectively. Each R ¹³ and each R ¹⁴ are independently preferably a C _1-9 alkyl group, more preferably a t-butyl group.

Each L ⁵ in the formula (6) independently represents a single bond, a sulfur atom or a divalent group represented by the formula (6a), and R ¹⁵ and R ¹⁶ in the formula (6a) Each independently represents a hydrogen atom or a C _1-7 alkyl group, provided that the total number of carbon atoms is 7 or less. There are three L ^{5 s} , and each L ⁵ may be the same as or different from each other, preferably the same.

The C _1-7 alkyl group may be linear or branched. The carbon number of the C _1-7 alkyl group is preferably 1 or more and 3 or less. The total number of carbon atoms of R ¹⁵ and R ¹⁶ is preferably 3 or less. Examples of the C _1-7 alkyl group include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, sec-butyl group, t-butyl group, pentyl group, isopentyl group, neopentyl group, t- A pentyl group, a hexyl group, a heptyl group, etc. are mentioned.

Examples of the divalent group (6a) include —CH ₂ —, —CH (CH ₃ ) —, —CH (C ₂ H ₅ ) —, —C (CH ₃ ) ₂ —, —CH (n—C). ₃ H ₇₎ -, and the like.

Each L ⁵ is preferably —CH ₂ — or a single bond, more preferably a single bond.

Each L ⁶ in formula (6) independently represents a C _2-8 alkylene group. There are three L ^{6 s} , and each L ⁶ may be the same as or different from each other, preferably the same. _{Examples of the} C _2-8 alkylene group include those described above. Each L ⁶ is independently preferably an ethylene group or a trimethylene group, more preferably an ethylene group.

  As the compound (6), 6,6 ′, 6 ″-[nitrilotris (ethyleneoxy)] tris (2,4,8,10-tetra-t-butyldibenzo [d, f] [1,3,2] Dioxaphosphepine) (hereinafter sometimes abbreviated as “compound (6-1)”). Compound (6-1) is commercially available as “Irgaphos (registered trademark) 12” (manufactured by BASF).

In the formula (7), each R ¹⁷ and each R ¹⁸ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 Represents an aralkyl group or a phenyl group. _Examples of the C _1-9 alkyl group, C _5-8 cycloalkyl group, C _6-12 alkylcycloalkyl group, and C _7-12 aralkyl group of R ¹⁷ and R ¹⁸ include those described above. Although there are two R ^{17 s} , each R ¹⁷ may be the same as or different from each other, preferably the same. The same applies to each R ¹⁸ . Position of R ¹⁷ and R ^18, it is when the position of the carbon atoms of the benzene ring to which L ⁷ is bonded to position 1 which is 3-position and 5-position, i.e., benzene ring O is attached When the position of each carbon atom is the 1st position, the 2nd and 4th positions are preferred. Each R ¹⁷ and each R ¹⁸ are independently preferably a C _1-9 alkyl group, more preferably a t-butyl group.

R ¹⁹ in the formula (7) represents a C _1-8 alkyl group or a phenyl group. The phenyl group of R ¹⁹ is at least one selected from the group consisting of a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, and a C _7-12 aralkyl group as a substituent. You may have. _{Examples of the} phenyl group having a C _1-8 alkyl group and a substituent for R ¹⁹ include those described above. However, the carbon number of the C _1-8 alkyl group of R ¹⁹ is preferably 4 or more and 8 or less. R ¹⁹ is preferably a C _1-8 alkyl group, more preferably an octyl group.

L ⁷ in the formula (7) represents a single bond, a sulfur atom or a divalent group represented by the formula (7a), and R ²⁰ and R ²¹ in the formula (7a) have a total carbon number of 7 Each independently represents a hydrogen atom or a C _1-7 alkyl group, provided that _Examples of the C _1-7 alkyl group for R ²⁰ and R ²¹ include those described above. The total carbon number of R ²⁰ and R ²¹ is preferably 3 or less. Specific examples of the divalent group (7a) include the same as the divalent group (6a). L ⁷ is preferably —CH ₂ — or a single bond, more preferably —CH ₂ —.

  Examples of the compound (7) include 2,2-methylenebis (4,6-di-t-butylphenyl) octyl phosphite (hereinafter sometimes abbreviated as “compound (7-1)”) and 2,2 And '-methylenebis (4,6-di-t-butylphenyl) 2-ethylhexyl phosphite. Of these, the compound (7-1) is preferable. The compound (7-1) is commercially available as “ADK STAB (registered trademark) HP-10” (manufactured by Adeka).

  Among the compounds (3) to (7), the compound (3) is preferable, and the compound (3-1) is more preferable.

  When the processing stabilizer contains compound (2) to compound (7), each content of compound (2) to compound (7) is based on 100 parts by mass of compound (1) and maltitol in total. Preferably it is 0.1 parts by mass or more (more preferably 10 parts by mass or more, more preferably 20 parts by mass or more), preferably 200 parts by mass or less (more preferably 90 parts by mass or less, more preferably 80 parts by mass or less). is there.

  The processing stabilizer of this invention contains a compound (1) and maltitol and a compound (2)-a compound (7) as needed. Furthermore, the processing stabilizer of the present invention may contain additives other than these (hereinafter abbreviated as “other additives”). Only 1 type may be used for another additive and it may use 2 or more types together. Other additives include, for example, antioxidants, ultraviolet absorbers, light stabilizers, stabilizers, lubricants, metal deactivators, nucleating agents, antistatic agents, flame retardants, fillers, pigments, inorganic fillers Agents and the like.

  Examples of the antioxidant include a phenol-based antioxidant, a sulfur-based antioxidant, a phosphorus-based antioxidant, and a hydroquinone-based antioxidant.

Examples of the phenolic antioxidant include those described in the following [1] to [16].
[1] 2,6-di-t-butyl-4-methylphenol, 2,4,6-tri-t-butylphenol, 2,6-di-t-butylphenol, 2-t-butyl-4,6- Dimethylphenol, 2,6-di-t-butyl-4-ethylphenol, 2,6-di-t-butyl-4-n-butylphenol, 2,6-di-t-butyl-4-isobutylphenol, 2 , 6-dicyclopentyl-4-methylphenol, 2- (α-methylcyclohexyl) -4,6-dimethylphenol, 2,6-dioctadecyl-4-methylphenol, 2,4,6-tricyclohexylphenol, 2 , 6-Di-tert-butyl-4-methoxymethylphenol, 2,6-di-nonyl-4-methylphenol, 2,4-dimethyl-6- (1′-methylundecyl-1′-yl) Alkyl such as phenol, 2,4-dimethyl-6- (1′-methylheptadecyl-1′-yl) phenol, 2,4-dimethyl-6- (1′-methyltridecyl-1′-yl) phenol Monophenol.

  [2] 2,4-bis (octylthiomethyl) -6-t-butylphenol, 2,4-bis (octylthiomethyl) -6-methylphenol, 2,4-bis (octylthiomethyl) -6-ethyl Alkylthiomethylphenols such as phenol and 2,6-bis (dodecylthiomethyl) -4-nonylphenol;

  [3] 2,2′-methylenebis (4-methyl-6-tert-butylphenol), 2,2′-methylenebis (4-ethyl-6-tert-butylphenol), 2,2′-methylenebis [4-methyl- 6- (α-methylcyclohexyl) phenol], 2,2′-methylenebis (4-methyl-6-cyclohexylphenol), 2,2′-methylenebis (4-methyl-6-nonylphenol), 2,2′-methylenebis (4,6-di-t-butylphenol), 2,2'-ethylidenebis (4,6-di-t-butylphenol), 2,2'-ethylidenebis (4-isobutyl-6-t-butylphenol), 2,2′-methylenebis [6- (α-methylbenzyl) -4-nonylphenol], 2,2′-methylenebis [6- (α, α-dimethylbenzyl) 4-nonylphenol], 4,4′-methylenebis (6-tert-butyl-2-methylphenol), 4,4′-methylenebis (2,6-di-tert-butylphenol), 4,4′-butylidenebis (3 -Methyl-6-tert-butylphenol), 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) butane, 2,6- Bis (3-t-butyl-5-methyl-2-hydroxybenzyl) -4-methylphenol, 1,1,3-tris (5-t-butyl-4-hydroxy-2-methylphenyl) butane, 1, 1-bis (5-t-butyl-4-hydroxy-2-methylphenyl) -3-n-dodecyl mercaptobutane, ethylene glycol bis [3,3-bis (3′-t-butyl) -4'-hydroxyphenyl) butyrate], bis (3-t-butyl-4-hydroxy-5-methylphenyl) dicyclopentadiene, bis [2- (3'-t-butyl-2'-hydroxy-5) '-Methylbenzyl) -6-tert-butyl-4-methylphenyl] terephthalate, 1,1-bis (3,5-dimethyl-2-hydroxyphenyl) butane, 2,2-bis (3,5-di-) t-butyl-4-hydroxyphenyl) propane, 2,2-bis (5-t-butyl-4-hydroxy-2-methylphenyl) -4-n-dodecylmercaptobutane, 1,1,5,5-tetra Alkylidene bisphenols such as (5-t-butyl-4-hydroxy-2-methylphenyl) pentane and derivatives thereof;

  [4] Acylaminophenol derivatives such as 4-hydroxylauric acid anilide, 4-hydroxystearic acid anilide, octyl-N- (3,5-di-t-butyl-4-hydroxyphenyl) carbamate.

  [5] β- (3,5-di-t-butyl-4-hydroxyphenyl) propionic acid and mono- or polyhydric alcohols (for example, methanol, ethanol, octanol, octadecanol, ethylene glycol, 1,3 -Propanediol, 1,4-butanediol, 1,6-hexanediol, 1,9-nonanediol, neopentyl glycol, diethylene glycol, thioethylene glycol, spiro glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) Isocyanurate, N, N′-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6, 7-trio Sabishikuro [2,2,2] octane or a mixture thereof).

  [6] 2,2′-thiobis (6-tert-butylphenol), 2,2′-thiobis (4-methyl-6-tert-butylphenol), 2,2′-thiobis (4-octylphenol), 4,4 Bis (hydroxyphenyl) sulfides such as' -thiobis (2-methyl-6-tert-butylphenol), 4,4'-bis (2,6-dimethyl-4-hydroxyphenyl) sulfide.

  [7] 3,5,3 ′, 5′-tetra-t-butyl-4,4′-dihydroxydibenzyl ether, octadecyl-4-hydroxy-3,5-dimethylbenzyl mercaptoacetate, tris (3,5- Di-t-butyl-4-hydroxybenzyl) amine, bis (4-t-butyl-3-hydroxy-2,6-dimethylbenzyl) dithioterephthalate, bis (3,5-di-t-butyl-4-hydroxy) Benzyl) sulfide, O-benzyl derivatives such as isooctyl-3,5-di-t-butyl-4-hydroxybenzyl mercaptoacetate, N-benzyl derivatives and S-benzyl derivatives.

  [8] 2,4-Bis (n-octylthio) -6- (4-hydroxy-3,5-di-t-butylanilino) -1,3,5-triazine, 2-n-octylthio-4,6- Bis (4-hydroxy-3,5-di-t-butylanilino) -1,3,5-triazine, 2-n-octylthio-4,6-bis (4-hydroxy-3,5-di-t-butyl) Phenoxy) -1,3,5-triazine, 2,4,6-tris (3,5-di-t-butyl-4-phenoxy) -1,3,5-triazine, tris (4-t-butyl-) 3-hydroxy-2,6-dimethylbenzyl) isocyanurate, tris (3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate, 2,4,6-tris (3,5-di-t- Butyl-4-hydroxyphenylethyl) -1, , 5-triazine, 2,4,6-tris (3,5-di-t-butyl-4-hydroxyphenylpropyl) -1,3,5-triazine, tris (3,5-dicyclohexyl-4-hydroxybenzyl ) Triazine derivatives such as isocyanurate and tris [2- (3 ′, 5′-di-t-butyl-4′-hydroxycinnamoyloxy) ethyl] isocyanurate.

  [9] Dioctadecyl-2,2-bis (3,5-di-t-butyl-2-hydroxybenzyl) malonate, dioctadecyl-2- (3-t-butyl-4-hydroxy-5-methylbenzyl) Malonate, didodecyl mercaptoethyl-2,2-bis (3,5-di-t-butyl-4-hydroxybenzyl) malonate, bis [4- (1,1,3,3-tetramethylbutyl) phenyl]- Hydroxybenzylated malonate derivatives such as 2,2-bis (3,5-di-tert-butyl-4-hydroxybenzyl) malonate.

  [10] 1,3,5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, 1,4-bis (3,5-di-t- Aromatic hydroxybenzyl such as butyl-4-hydroxybenzyl) -2,3,5,6-tetramethylbenzene, 2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) phenol Derivative.

  [11] Dimethyl-3,5-di-t-butyl-4-hydroxybenzylphosphonate, diethyl-3,5-di-t-butyl-4-hydroxybenzylphosphonate, dioctadecyl-3,5-di-t- Butyl-4-hydroxybenzylphosphonate, dioctadecyl-5-t-butyl-4-hydroxy-3-methylbenzylphosphonate, calcium salt of 3,5-di-t-butyl-4-hydroxybenzylphosphonic acid monoester, etc. Benzylphosphonate derivative.

  [12] β- (5-tert-butyl-4-hydroxy-3-methylphenyl) propionic acid and monohydric or polyhydric alcohol (for example, methanol, ethanol, octanol, octadecanol, ethylene glycol, 1,3 -Propanediol, 1,4-butanediol, 1,6-hexanediol, 1,9-nonanediol, neopentyl glycol, diethylene glycol, thioethylene glycol, spiro glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) Isocyanurate, N, N′-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6, 7- Riokisabishikuro [2,2,2] octane or a mixture thereof).

  [13] β- (3,5-dicyclohexyl-4-hydroxyphenyl) propionic acid and a monohydric or polyhydric alcohol (for example, methanol, ethanol, octanol, octadecanol, ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, 1,9-nonanediol, neopentyl glycol, diethylene glycol, thioethylene glycol, spiro glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N , N′-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-to Oxabicyclo [2,2,2] octane or a mixture thereof).

  [14] 3,5-di-t-butyl-4-hydroxyphenylacetic acid and a monohydric or polyhydric alcohol (for example, methanol, ethanol, octanol, octadecanol, ethylene glycol, 1,3-propanediol, 1 , 4-butanediol, 1,6-hexanediol, 1,9-nonanediol, neopentyl glycol, diethylene glycol, thioethylene glycol, spiro glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N′-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo [ 2,2] octane or a mixture thereof).

  [15] N, N′-bis [3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionyl] hydrazine, N, N′-bis [3- (3 ′, 5 ′ -Di-t-butyl-4'-hydroxyphenyl) propionyl] hexamethylenediamine, N, N'-bis [3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionyl] tri Amides of β- (3,5-di-t-butyl-4-hydroxyphenyl) propionic acid such as methylenediamine.

  [16] Tocopherols such as α-tocopherol, β-tocopherol, γ-tocopherol, and δ-tocopherol.

  Examples of the sulfur-based antioxidant include dilauryl 3,3′-thiodipropionate, tridecyl 3,3′-thiodipropionate, dimyristyl 3,3′-thiodipropionate, and distearyl 3,3′-. Examples include thiodipropionate, lauryl stearyl 3,3′-thiodipropionate, and neopentanetetrakis (3-laurylthiopropionate).

  Examples of phosphorus antioxidants include trilauryl phosphite, trioctadecyl phosphite, tristearyl sorbitol triphosphite, 2,2′-ethylidenebis (4,6-di-t-butylphenyl) fluorophosphite, bis (2,4-di-t-butyl-6-methylphenyl) ethyl phosphite, bis (2,4-di-t-butyl-6-methylphenyl) methyl phosphite, 2- (2,4,6- And tri-t-butylphenyl) -5-ethyl-5-butyl-1,3,2-oxaphosphorinane.

  Examples of the hydroquinone antioxidant include 2,6-di-t-butyl-4-methoxyphenol, 2,5-di-t-butylhydroquinone, 2,5-di-t-pentylhydroquinone, 2,6 -Diphenyl-4-octadecyloxyphenol, 2,6-di-t-butylhydroquinone, 2,5-di-t-butyl-4-hydroxyanisole, 3,5-di-t-butyl-4-hydroxyphenyl steer Rate, bis (3,5-di-t-butyl-4-hydroxyphenyl) adipate, and the like.

As an ultraviolet absorber, the thing etc. which are described in the following [1]-[3] etc. are mentioned, for example.
[1] Phenyl salicylate, 4-t-butylphenyl salicylate, 2,4-di-t-butylphenyl 3 ′, 5′-di-t-butyl-4′-hydroxybenzoate, 4-t-octylphenyl salicylate, Bis (4-t-butylbenzoyl) resorcinol, benzoylresorcinol, hexadecyl 3 ′, 5′-di-t-butyl-4′-hydroxybenzoate, octadecyl 3 ′, 5′-di-t-butyl-4′-hydroxy Salicylate derivatives such as benzoate, 2-methyl-4,6-di-t-butylphenyl 3 ′, 5′-di-t-butyl-4′-hydroxybenzoate.

  [2] 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone, bis (5-benzoyl-4-hydroxy 2-Hydroxybenzophenone derivatives such as -2-methoxyphenyl) methane and 2,2 ′, 4,4′-tetrahydroxybenzophenone.

  [3] 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2- (3 ′, 5′-di-t-butyl-2′-hydroxyphenyl) benzotriazole, 2- (5′-t- Butyl-2′-hydroxyphenyl) benzotriazole, 2- (2′-hydroxy-5′-t-octylphenyl) benzotriazole, 2- (3-t-butyl-2-hydroxy-5-methylphenyl) -5 -Chlorobenzotriazole, 2- (3'-sec-butyl-2'-hydroxy-5'-t-butylphenyl) benzotriazole, 2- (2'-hydroxy-4'-octyloxyphenyl) benzotriazole, 2 -(3 ', 5'-di-t-pentyl-2'-hydroxyphenyl) benzotriazole, 2- [2'-hydroxy-3', 5'-bi (Α, α-Dimethylbenzyl) phenyl] -2H-benzotriazole, 2-[(3′-tert-butyl-2′-hydroxyphenyl) -5 ′-(2-octyloxycarbonylethyl) phenyl] -5 Chlorobenzotriazole, 2- [3′-t-butyl-5 ′-[2- (2-ethylhexyloxy) carbonylethyl] -2′-hydroxyphenyl] -5-chlorobenzotriazole, 2- [3′-t -Butyl-2'-hydroxy-5 '-(2-methoxycarbonylethyl) phenyl] -5-chlorobenzotriazole, 2- [3'-t-butyl-2'-hydroxy-5'-(2-methoxycarbonyl) Ethyl) phenyl] benzotriazole, 2- [3′-t-butyl-2′-hydroxy-5- (2-octyloxycarbonylethyl) fur Nyl] benzotriazole, 2- [3′-t-butyl-2′-hydroxy-5 ′-[2- (2-ethylhexyloxy) carbonylethyl] phenyl] benzotriazole, 2- [2-hydroxy-3- ( 3,4,5,6-tetrahydrophthalimidomethyl) -5-methylphenyl] benzotriazole, 2- (3,5-di-t-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3 Of '-dodecyl-2'-hydroxy-5'-methylphenyl) benzotriazole and 2- [3'-t-butyl-2'-hydroxy-5'-(2-isooctyloxycarbonylethyl) phenyl] benzotriazole Mixture, 2,2'-methylenebis [6- (2H-benzotriazol-2-yl) -4- (1,1,3,3- Tramethylbutyl) phenol], 2,2′-methylenebis [4-tert-butyl-6- (2H-benzotriazol-2-yl) phenol], poly (3-11) (ethylene glycol) and 2- [3 Condensate with '-t-butyl-2'-hydroxy-5'-(2-methoxycarbonylethyl) phenyl] benzotriazole, poly (3-11) (ethylene glycol) and methyl 3- [3- (2H- Condensate with benzotriazol-2-yl) -5-tert-butyl-4-hydroxyphenyl] propionate, 2-ethylhexyl 3- [3-tert-butyl-5- (5-chloro-2H-benzotriazole-2) -Yl) -4-hydroxyphenyl] propionate, octyl 3- [3-tert-butyl-5- (5-chloro-2H-benzotriazole-2) -Yl) -4-hydroxyphenyl] propionate, methyl 3- [3-t-butyl-5- (5-chloro-2H-benzotriazol-2-yl) -4-hydroxyphenyl] propionate, 3- [3- 2- (2′-hydroxyphenyl) benzotriazole such as t-butyl-5- (5-chloro-2H-benzotriazol-2-yl) -4-hydroxyphenyl] propionic acid.

Examples of the light stabilizer include those described in the following [1] to [5].
[1] A hindered amine light stabilizer, for example, one described in the following [a] to [c].
[A] Bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (2,2,6,6-tetramethyl-4-piperidyl) succinate, bis (1,2,2,6 , 6-Pentamethyl-4-piperidyl) sebacate, bis (N-octoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (N-benzyloxy-2,2,6,6-tetra Methyl-4-piperidyl) sebacate, bis (N-cyclohexyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) 2- (3,5-di-t-butyl-4-hydroxybenzyl) -2-butylmalonate, bis (1-acryloyl-2,2,6,6-tetramethyl-4-piperidyl) 2, -Bis (3,5-di-tert-butyl-4-hydroxybenzyl) malonate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) decanedioate, 2,2,6,6- Tetramethyl-4-piperidyl methacrylate, 4- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxy] -1- [2- (3- (3,5-di-t- Butyl-4-hydroxyphenyl) propionyloxy) ethyl] -2,2,6,6-tetramethylpiperidine, 2-methyl-2- (2,2,6,6-tetramethyl-4-piperidyl) amino-N -(2,2,6,6-tetramethyl-4-piperidyl) propionamide, tetrakis (2,2,6,6-tetramethyl-4-piperidyl) 1,2,3,4-butanetetracarboxylate Tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) 1,2,3,4-butane tetracarboxylate.

  [B] 1,2,3,4-butane mixed esterified product of 1,2,3,4-butanetetracarboxylic acid and 1,2,2,6,6-pentamethyl-4-piperidinol and 1-tridecanol Mixed esterified products of tetracarboxylic acid and 2,2,6,6-tetramethyl-4-piperidinol and 1-tridecanol, 1,2,3,4-butanetetracarboxylic acid and 1,2,2,6,6 A mixed esterified product of pentamethyl-4-piperidinol and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro [5.5] undecane, 2,3,4-butanetetracarboxylic acid and 2,2,6,6-tetramethyl-4-piperidinol and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4 8,10 mixed ester of tetraoxaspiro [5.5] undecane.

  [C] Polycondensate of dimethyl succinate and 1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine, poly [(6-morpholino-1,3,5 -Triazine-2,4-diyl) ((2,2,6,6-tetramethyl-4-piperidyl) imino) hexamethylene ((2,2,6,6-tetramethyl-4-piperidyl) imino)] , Poly [(6- (1,1,3,3-tetramethylbutyl) imino-1,3,5-triazine-2,4-diyl) ((2,2,6,6-tetramethyl-4- Piperidyl) imino) hexamethylene ((2,2,6,6-tetramethyl-4-piperidyl) imino)], N, N′-bis (2,2,6,6-tetramethyl-4-piperidyl) hexa Methylenediamine and 1,2-dibromoethane Polycondensate, N, N ′, 4,7-tetrakis [4,6-bis (N-butyl-N- (2,2,6,6-tetramethyl-4-piperidyl) amino) -1,3 5-Triazin-2-yl] -4,7-diazadecane-1,10-diamine, N, N ′, 4-tris [4,6-bis (N-butyl-N- (2,2,6,6) -Tetramethyl-4-piperidyl) amino) -1,3,5-triazin-2-yl] -4,7-diazadecane-1,10-diamine, N, N ', 4,7-tetrakis [4,6 -Bis (N-butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino) -1,3,5-triazin-2-yl] -4,7-diazadecane-1, 10-diamine, N, N ′, 4-tris [4,6-bis (N-butyl-N- (1,2,2,6, - pentamethyl-4-piperidyl) amino) -1,3,5-triazin-2-yl] -4,7-diazadecane-1,10-diamine.

  [2] Ethyl α-cyano-β, β-diphenyl acrylate, isooctyl α-cyano-β, β-diphenyl acrylate, methyl α-carbomethoxycinnamate, methyl α-cyano-β-methyl-p-methoxycinnamate, Acrylate-based light stability such as butyl α-cyano-β-methyl-p-methoxycinnamate, methyl α-carbomethoxy-p-methoxycinnamate and N- (β-carbomethoxy-β-cyanovinyl) -2-methylindoline Agent.

  [3] Nickel complex of 2,2′-thiobis- [4- (1,1,3,3-tetramethylbutyl) phenol], nickel dibutyldithiocarbamate, nickel salt of monoalkyl ester, nickel complex of ketoxime, etc. Nickel-based light stabilizer.

  [4] 4,4′-Dioctyloxyoxanilide, 2,2′-diethoxyoxanilide, 2,2′-dioctyloxy-5,5′-di-t-butylanilide, 2,2′- Didodecyloxy-5,5′-di-t-butylanilide, 2-ethoxy-2′-ethyloxanilide, N, N′-bis (3-dimethylaminopropyl) oxamide, 2-ethoxy-5-t -Oxamide light stabilizers such as butyl-2'-ethoxyanilide and 2-ethoxy-5,4'-di-t-butyl-2'-ethyloxanilide.

  [5] 2,4,6-tris (2-hydroxy-4-octyloxyphenyl) -1,3,5-triazine, 2- (2-hydroxy-4-octyloxyphenyl) -4,6-bis ( 2,4-dimethylphenyl) -1,3,5-triazine, 2- (2,4-dihydroxyphenyl) -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2 , 4-bis (2-hydroxy-4-propyloxyphenyl) -6- (2,4-dimethylphenyl) -1,3,5-triazine, 2- (2-hydroxy-4-octyloxyphenyl) -4 , 6-Bis (4-methylphenyl) -1,3,5-triazine, 2- (2-hydroxy-4-dodecyloxyphenyl) -4,6-bis (2,4-dimethylphenyl) -1,3 , 5-triazine, -[2-hydroxy-4- (2-hydroxy-3-butyloxypropoxy) phenyl] -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2- [2-hydroxy 2- (2-hydroxyphenyl) -1 such as -4- (2-hydroxy-3-octyloxypropoxy) phenyl] -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine , 3,5-triazine light stabilizer.

  Examples of the stabilizer include N, N-dibenzylhydroxyamine, N, N-diethylhydroxyamine, N, N-dioctylhydroxyamine, N, N-dilaurylhydroxyamine, and N, N-ditetradecylhydroxyamine. , N, N-dihexadecylhydroxyamine, N, N-dioctadecylhydroxyamine, N-hexadecyl-N-octadecylhydroxyamine, N-heptadecyl-N-octadecylhydroxyamine, and the like.

Examples of the lubricant include aliphatic hydrocarbons such as paraffin and wax, C _8-22 higher fatty acids, C _8-22 higher fatty acid metal (Al, Ca, Mg, Zn) salts, C _8-22 aliphatic alcohols, _Examples include polyglycols, esters of C _4-22 fatty acids and C _4-18 aliphatic monohydric alcohols, C _8-22 higher aliphatic amides, silicone oils, rosin derivatives, and the like.

  Among the other additives described above, phenolic antioxidants, phosphorus antioxidants, sulfur antioxidants, ultraviolet absorbers and hindered amine light stabilizers are preferred, and phenolic antioxidants are more preferred.

  Particularly preferred phenolic antioxidants include: 2,6-di-tert-butyl-4-methylphenol, 2,4,6-tri-tert-butylphenol, 2,4-bis ( Octylthiomethyl) -6-tert-butylphenol, 2,2′-thiobis (6-tert-butylphenol), 2,2′-methylenebis (4-methyl-6-tert-butylphenol), 2,2′-methylenebis ( 4-ethyl-6-t-butylphenol), 2,2′-methylenebis [4-methyl-6- (α-methylcyclohexyl) phenol], 2,2′-methylenebis (4-methyl-6-cyclohexylphenol), 2,2′-methylenebis (4,6-di-t-butylphenol), 2,2′-ethylidenebis (4,6-di-t-butylphenol), 4 4'-methylenebis (6-t-butyl-2-methylphenol), 4,4'-methylenebis (2,6-di-t-butylphenol), 4,4'-butylidenebis (3-methyl-6-t- Butylphenol), 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) butane, 1,1,3-tris (5-t -Butyl-4-hydroxy-2-methylphenyl) butane, ethylene glycol bis [3,3 (bis-3'-t-butyl-4'-hydroxyphenyl) butyrate], 2,4,6-tris (3 5-di-t-butyl-4-phenoxy) -1,3,5-triazine, tris (4-t-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate, bis 3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, tris [2- (3 ′, 5′-di-tert-butyl-4′-hydroxycinnamoyloxy) ethyl] isocyanurate, diethyl- 3,5-di-t-butyl-4-hydroxybenzylphosphonate, di-n-octadecyl-3,5-di-t-butyl-4-hydroxybenzylphosphonate, 3,5-di-t-butyl-4- Calcium salt of hydroxybenzylphosphonic acid monoester, neopentanetetrayltetrakis (3,5-di-tert-butyl-4-hydroxycinnamate), thiodiethylenebis (3,5-di-tert-butyl-4-hydroxy) Cinnamate), 1,3,5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) ben 3,6-dioxaoctamethylene bis (3,5-di-t-butyl-4-hydroxycinnamate), hexamethylene bis (3,5-di-t-butyl-4-hydroxycinnamate), Triethylene glycol bis (5-t-butyl-4-hydroxy-3-methylcinnamate), 3,9-bis [2- (3- (3-t-butyl-4-hydroxy-5-methylphenyl) propionyl Oxy) -1,1-dimethylethyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, N, N′-bis [3- (3 ′, 5′-di-t-butyl) -4'-hydroxyphenyl) propionyl] hydrazine, N, N'-bis [3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionyl] hexamethylenediamine.

  Particularly preferred phosphorus antioxidants include the following: 2,2′-ethylidenebis (4,6-di-t-butylphenyl) fluorophosphite, bis (2,4-di-t-). Butyl-6-methylphenyl) ethyl phosphite, 2- (2,4,6-tri-t-butylphenyl) -5-ethyl-5-butyl-1,3,2-oxaphosphorinane.

  Particularly preferred ultraviolet absorbers include: phenyl salicylate, 4-t-butylphenyl salicylate, 2,4-di-t-butylphenyl 3 ′, 5′-di-t-butyl-4 ′. -Hydroxybenzoate, 4-t-octylphenyl salicylate, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, Bis (5-benzoyl-4-hydroxy-2-methoxyphenyl) methane, 2,2 ′, 4,4′-tetrahydroxybenzophenone, 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2- (3 ', 5'-di-t-butyl-2'-hydroxyphenyl Benzotriazole, 2- (5′-t-butyl-2′-hydroxyphenyl) benzotriazole, 2- (2′-hydroxy-5′-t-octylphenyl) benzotriazole, 2- (3-t-butyl- 2-hydroxy-5-methylphenyl) -5-chlorobenzotriazole, 2- (3′-sec-butyl-2′-hydroxy-5′-t-butylphenyl) benzotriazole, 2- (2′-hydroxy- 4′-octyloxyphenyl) benzotriazole, 2- (3 ′, 5′-di-t-pentyl-2′-hydroxyphenyl) benzotriazole, 2- [2′-hydroxy-3 ′, 5′-bis ( [alpha], [alpha] -dimethylbenzyl) phenyl] -2H-benzotriazole.

  Particularly preferred hindered amine light stabilizers include: bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl- 4-piperidyl) sebacate, bis (N-octoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (N-benzyloxy-2,2,6,6-tetramethyl-4-piperidyl) ) Sebacate, bis (N-cyclohexyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) 2- (3 5-di-t-butyl-4-hydroxybenzyl) -2-butylmalonate, bis (1-acryloyl-2,2,6,6-tetramethyl-4-piperidyl) 2, -Bis (3,5-di-tert-butyl-4-hydroxybenzyl) -2-butylmalonate, bis (2,2,6,6-tetramethyl-4-piperidyl) succinate, 2,2,6 6-tetramethyl-4-piperidyl methacrylate, 4- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxy] -1- [2- (3- (3,5-di-) t-butyl-4-hydroxyphenyl) propionyloxy) ethyl] -2,2,6,6-tetramethylpiperidine, 2-methyl-2- (2,2,6,6-tetramethyl-4-piperidyl) amino -N- (2,2,6,6-tetramethyl-4-piperidyl) propionamide, tetrakis (2,2,6,6-tetramethyl-4-piperidyl) 1,2,3,4-butanetetracarboxyl Les , Tetrakis (1,2,6,6-pentamethyl-4-piperidyl) 1,2,3,4-butanetetracarboxylate, 1,2,3,4-butanetetracarboxylic acid and 1,2,2 , 6,6-pentamethyl-4-piperidinol and 1-tridecanol esterified products, 1,2,3,4-butanetetracarboxylic acid and 2,2,6,6-tetramethyl-4-piperidinol and 1- Mixed esterified product with tridecanol, 1,2,3,4-butanetetracarboxylic acid and 1,2,2,6,6-pentamethyl-4-piperidinol and 3,9-bis (2-hydroxy-1,1- Dimethylethyl) -2,4,8,10-tetraoxaspiro [5.5] undecane, 1,2,3,4-butanetetracarboxylic acid and 2,2,6 -Mixed esterified product of tetramethyl-4-piperidinol and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro [5.5] undecane, dimethyl Polycondensate of succinate and 1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine, poly [(6-morpholino-1,3,5-triazine-2 , 4-diyl) ((2,2,6,6-tetramethyl-4-piperidyl) imino) hexamethylene ((2,2,6,6-tetramethyl-4-piperidyl) imino)], poly [( 6- (1,1,3,3-tetramethylbutyl) imino-1,3,5-triazine-2,4-diyl) ((2,2,6,6-tetramethyl-4-piperidyl) imino) Hexamethylene ( 2,2,6,6-tetramethyl-4-piperidyl) imino)].

  Examples of the method for producing the processing stabilizer of the present invention include compound (1) and maltitol, and optionally compound (2) to compound (7) and other additives, Henschel mixer, super mixer, The method of mixing with mixers, such as a high speed mixer, is mentioned. The mixture thus obtained (processing stabilizer) may be further subjected to extrusion molding or stirring granulation.

  Next, the thermoplastic polymer composition of the present invention will be described. The thermoplastic polymer composition of the present invention comprises the above processing stabilizer (compound (1) and maltitol, and optionally compound (2) to compound (7) and other additives), a thermoplastic polymer, Containing. Only one type of thermoplastic polymer may be used, or two or more types may be used in combination.

  Examples of the thermoplastic polymer include polyethylene resins (high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene-vinyl alcohol copolymer (EVOH), ethylene-acrylic. Ethyl acetate copolymer (EEA), ethylene-vinyl acetate copolymer (EVA), etc.), polypropylene resin (crystalline propylene homopolymer, propylene-ethylene random copolymer, propylene-α-olefin random copolymer) , A propylene-ethylene-α-olefin copolymer, a propylene homopolymer, or a block of propylene-based copolymer, and a block of propylene and ethylene and / or other α-olefin copolymer Polypropylene block co-weight Body), methylpentene polymer, polystyrene resin (polystyrene (PS), poly (p-methylstyrene), poly (α-methylstyrene) and other polystyrenes, acrylonitrile-styrene copolymer (SAN), acrylonitrile-butadiene. -Styrene copolymer (ABS), special acrylic rubber-acrylonitrile-styrene copolymer, acrylonitrile-chlorinated polyethylene-styrene copolymer (ACS), styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene -Isoprene-styrene block copolymer (SIS), etc., polybutadiene resin (polybutadiene; polybutadiene rubber (BR); styrene-butadiene copolymer (SB); styrene-butadiene block copolymer (SBS); Impact polystyrene (HI-PS) modified with tadiene, styrene-butadiene copolymer or SBS; styrene-butadiene thermoplastic elastomer, etc., chlorinated polyethylene (CPE), polychloroprene, chlorinated rubber, polychlorinated Vinyl-based thermoplastic elastomer, polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), methacrylic resin, fluororesin, polyacetal (POM), grafted polyphenylene ether resin, polyphenylene sulfide resin (PPS), polyurethane (PU), polyamide (PA, also called nylon (registered trademark), for example, nylon 6 (Ny6), nylon 11 (Ny11), nylon 12 (Ny12), nylon 610 (Ny610), nylon 612 (Ny612), nylon MXD (NyMXD6), etc.), polyester resins (eg, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), etc.), polylactic acid (PLA), polycarbonate (PC), polyacrylate, polysulfone (PPSU), polyether ether ketone ( PEEK), polyethersulfone (PES), aromatic polyester, diallyl phthalate prepolymer, silicone resin (SI), 1,2-polybutadiene, polyisoprene, butadiene-acrylonitrile copolymer (NBR), ethylene-methyl methacrylate copolymer Examples include coalescence (EMMA).

  Among these, polyethylene resin, polypropylene resin, polystyrene resin and polybutadiene resin are preferable, polyethylene resin and polybutadiene resin are more preferable, and ethylene-vinyl alcohol copolymer (EVOH) is preferable because of good moldability. And styrene-butadiene block copolymer (SBS) are more preferred.

  There is no limitation in particular in the weight average molecular weight (Mw) of the thermoplastic polymer to be used. The Mw of the thermoplastic polymer is generally 1000 or more and 300,000 or less. This Mw can be measured, for example, by gel permeation chromatography (GPC) using polystyrene as a standard.

  The content of the processing stabilizer in the thermoplastic polymer composition is determined by the total amount of the compound (1) and maltitol. The total amount of the compound (1) and maltitol in the thermoplastic polymer composition is preferably 0.001 part by mass or more (more preferably 0.02 part by mass or more, further preferably) with respect to 100 parts by mass of the thermoplastic polymer. Is 0.1 part by mass or more, particularly preferably 0.5 part by mass or more), preferably 3 parts by mass or less (more preferably 2 parts by mass or less, further preferably 1 part by mass or less).

  When using the processing stabilizer containing a compound (2)-a compound (7), each content of the compound (2)-a compound (7) in a thermoplastic polymer composition is 100 mass parts of thermoplastic polymer compositions. Is preferably 0.001 part by mass or more (more preferably 0.02 part by mass or more), preferably 3 parts by mass or less (more preferably 2 parts by mass or less).

  Examples of the method for producing the thermoplastic polymer composition of the present invention include a method of mixing the processing stabilizer produced as described above and a thermoplastic polymer. In this production method, for example, when kneading a thermoplastic polymer, compound (1) and maltitol, and optionally compound (2) to compound (7) and other additives are converted into a thermoplastic polymer. Also included is a method of mixing these separately (ie, the processing stabilizer of the present invention and the thermoplastic polymer).

  As a method for mixing the processing stabilizer and the thermoplastic polymer, for example, (a) the processing stabilizer and the thermoplastic polymer are dry-blended, and then melt-kneaded with a single-screw or multi-screw extruder, followed by extrusion. (B) A processing stabilizer is dissolved in a solvent such as cyclohexane to prepare a processing stabilizer solution, and this solution is added to the thermoplastic polymer after completion of polymerization. And a method of removing the solvent from the polymer solution.

  The obtained thermoplastic polymer composition may be molded by supplying it to a molding machine in a molten state without cooling. The molding method is not particularly limited, and for example, a molding method such as an injection molding method, an extrusion molding method, an extrusion blow molding method, an injection blow molding method, or a biaxial stretch blow molding method can be used.

  By cooling after molding, a thermoplastic polymer molded article comprising the thermoplastic polymer composition of the present invention is obtained. Applications of the thermoplastic polymer moldings obtained include, for example, electronic components (for example, coil bobbins, connectors, switches, resistor components, sockets, relays, capacitor cases, fuses, motors, microwave ovens, printed boards, IC manufacturing equipment, lamps. Etc.), automotive parts (eg air outlet garnish, hood vent, distributor cap, exhaust gas control valve, etc.), watch parts (eg gears, cams and other mechanical parts, ground plates, etc.), camera parts (eg bottom lid, lens barrel, Lever, etc.), leisure parts (eg reels), home appliance housing, lighting and wiring equipment, film, bottle, textile, septic tank, toilet, bathtub, unit bath, water tank, ship, chemical tank, pipe, corrugated sheet , Flat plate, paint, decorative plate, sealing of electrical parts Wood, and the like resin concrete.

  Hereinafter, the present invention will be described in more detail with reference to examples and the like. The following “parts” are based on mass unless otherwise specified. In addition, “melt flow rate” is described as “MFR”.

[1] Raw materials The raw materials used in the following examples and comparative examples are as follows.
Compound (1-1): 6- [3- (3-t-butyl-4-hydroxy-5-methylphenyl) propoxy] -2,4,8,10-tetra-t-butyldibenz [d, f] [ 1,3,2] Dioxaphosphepine (“Sumilyzer (registered trademark) GP” manufactured by Sumitomo Chemical)
Maltitol (Tokyo Chemical Industry Co., Ltd.)
Compound (2-1): Octadecyl 3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate (“Irganox (registered trademark) 1076” manufactured by BASF)
Compound (2-2): 3,9-bis [2- {3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy} -1,1-dimethylethyl] -2,4 8,10-tetraoxaspiro [5.5] undecane (manufactured by Sumitomo Chemical Co., Ltd., Sumilizer (registered trademark) GA-80))
Compound (2-3): Pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (“Irganox (registered trademark) 1010” manufactured by BASF)
Compound (3-1): Tris (2,4-di-t-butylphenyl) phosphite (“Irgaphos (registered trademark) 168” manufactured by BASF)
Compound (4-1): Tetrakis (2,4-di-t-butylphenyl) -4,4-biphenylenediphosphonite ("Sandstub (registered trademark) P-EPQ" manufactured by Clariant)
Compound (5-1): Bis (2,6-di-t-butyl-4-methylphenyl) pentaerythritol diphosphite (“Adekastab (registered trademark) PEP-36” manufactured by Adeka)
Compound (5-2): Bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite (“Ultranox (registered trademark) 626” manufactured by GE Plastics)
Compound (5-3): Bis (2,4-dicumylphenyl) pentaerythritol diphosphite (“Doverphos S9228T” manufactured by Dover Chemical)
Compound (6-1): 6,6 ′, 6 ″-[nitrilotris (ethyleneoxy)] tris (2,4,8,10-tetra-t-butyldibenzo [d, f] [1,3,2 Dioxaphosphepine) ("Irgafos (registered trademark) 12" manufactured by BASF)
Compound (7-1): 2,2-methylenebis (4,6-di-t-butylphenyl) octyl phosphite (“ADEKA STAB (registered trademark) HP-10” manufactured by ADEKA)

[2] Evaluation of processing stability of thermoplastic polymer composition The processing stability of the thermoplastic polymer compositions obtained in the following Examples and Comparative Examples was evaluated as follows. First, a residence MFR test was conducted using pellets of the thermoplastic polymer composition. The test is based on JIS K 7210, using a melt indexer (L217-E14011, manufactured by Techno Seven Co., Ltd.) under the conditions of a temperature in a cylinder of 270 ° C. and a load of 2.16 kg (MFR before residence) (g / 10 min. ) And post-retention MFR (g / 10 min). The MFR before residence was measured after filling the cylinder with pellets of the thermoplastic polymer composition and taking a preheating time of 5 minutes. The post-retention MFR was measured after the thermoplastic polymer composition pellets were retained in the cylinder for a total of 30 minutes including the preheat time. From the MFR before residence and the MFR after residence thus obtained, the MFR fluctuation rate was calculated based on the following formula:
MFR fluctuation rate (%)
= Absolute value of (MFR after residence-MFR before residence) x 100 / (MFR before residence)
The smaller the MFR variation rate, the better the processing stability of the thermoplastic polymer composition.

Example 1 Production of Processing Stabilizer Compound (1-1) and maltitol were mixed in the amounts shown in Table I to produce a processing stabilizer.

Example 2: Production of thermoplastic polymer composition 0.11 part of the processing stabilizer obtained in Example 1 and 100 parts of an ethylene-vinyl alcohol copolymer ("Eval F171B" manufactured by Kuraray Co., Ltd.) are dry blended. After that, the obtained mixture was kneaded and extruded at a temperature of 230 ° C. and a screw rotation speed of 50 rpm using a single screw extruder having a screw diameter of 30 mm (“VS30-28 type extruder” manufactured by Tanabe Plastics) to obtain a strand. The strands were cut with a pelletizer to obtain thermoplastic polymer composition pellets. The processing stability results of the resulting thermoplastic polymer composition are shown in Table II.

Examples 3 to 7: Production of Processing Stabilizer Compound (1-1) and maltitol were mixed in the amounts shown in Table I to produce a processing stabilizer.

Examples 8 to 12: Production of thermoplastic polymer composition Except for using 0.2 parts of the processing stabilizer obtained in Examples 3 to 7 instead of the processing stabilizer obtained in Example 1. In the same manner as in Example 2, pellets of a thermoplastic polymer composition were obtained. The processing stability results of the resulting thermoplastic polymer composition are shown in Table II.

Comparative Example 1: Production of thermoplastic polymer composition As in Example 2, except that only 0.1 part of compound (1-1) was used instead of the processing stabilizer obtained in Example 1. A pellet of the thermoplastic polymer composition was obtained. The processing stability results of the resulting thermoplastic polymer composition are shown in Table II.

  From the comparison between Examples 2 and 8 to 12 and Comparative Example 1, compared to the case where compound (1) is used alone, the combination of compound (1) and maltitol is effective for the thermoplastic polymer composition. It can be seen that the processing stability is improved.

Examples 13-99: Manufacture of a processing stabilizer A processing stabilizer is obtained by mixing the raw materials described in Tables III-1 to III-3.

Examples 100-182: Production of thermoplastic polymer compositions Thermoplastic polymer compositions as in Example 2, except that the thermoplastic polymers and process stabilizers listed in Tables IV-1 to IV-3 are used. A pellet of the product is obtained.

The meanings of the abbreviations of the thermoplastic polymers described in Tables IV-1 to IV-3 are as follows. P-1: High density polyethylene (HDPE)
P-2: Low density polyethylene (LDPE)
P-3: Linear low density polyethylene (LLDPE)
P-4: Ethylene-ethyl acrylate copolymer (EEA)
P-5: Ethylene-vinyl acetate copolymer (EVA)
P-6: Crystalline propylene homopolymer P-7: Propylene-ethylene random copolymer P-8: Propylene-α-olefin random copolymer P-9: Propylene-ethylene-α-olefin copolymer P- 10: Polystyrene (PS)
P-11: Acrylonitrile-styrene copolymer (SAN)
P-12: Acrylonitrile-butadiene-styrene copolymer (ABS)
P-13: Special acrylic rubber-acrylonitrile-styrene copolymer P-14: Acrylonitrile-chlorinated polyethylene-styrene copolymer (ACS)
P-15: Polybutadiene rubber (BR)
P-16: Styrene-butadiene copolymer (SB)
P-17: Styrene-butadiene block copolymer (SBS)
P-18: Chlorinated polyethylene (CPE)
P-19: Polychloroprene P-20: Chlorinated rubber P-21: Polyvinyl chloride (PVC)
P-22: Polyvinylidene chloride (PVDC)
P-23: Methacrylic resin P-24: Fluororesin P-25: Polyacetal (POM)
P-26: Grafted polyphenylene ether resin P-27: Polyphenylene sulfide resin (PPS)
P-28: Polyurethane (PU)
P-29: Nylon 6 (Ny6)
P-30: Nylon 11 (Ny11)
P-31: Nylon 12 (Ny12)
P-32: Nylon 610 (Ny610)
P-33: Nylon 612 (Ny612)
P-34: Nylon MXD6 (NyMXD6)
P-35: Polyethylene terephthalate (PET)
P-36: Polybutylene terephthalate (PBT)
P-37: Polylactic acid (PLA)
P-38: Polycarbonate (PC)
P-39: Polyacrylate P-40: Polysulfone (PPSU)
P-41: Polyetheretherketone (PEEK)
P-42: Polyethersulfone (PES)
P-43: Aromatic polyester P-44: Diallyl phthalate prepolymer P-45: Silicone resin (SI)
P-46: 1,2-polybutadiene P-47: polyisoprene P-48: butadiene-acrylonitrile copolymer (NBR)
P-49: Ethylene-methyl methacrylate copolymer (EMMA)
P-50: Styrene-ethylene-butylene-styrene block copolymer (SEBS)
P-51: Styrene-isoprene-styrene block copolymer (SIS)
P-52: Styrene-butadiene thermoplastic elastomer P-53: Polyvinyl chloride thermoplastic elastomer

  The thermoplastic polymer composition of the present invention containing compound (1) and maltitol exhibits excellent processing stability. The thermoplastic polymer composition of the present invention can be used, for example, in the production of electronic parts, automobile parts, watch parts, camera parts, leisure parts and the like.

Claims (10)

Formula (1):

[In Formula (1),
Each R ¹ , each R ² , R ⁴ and R ⁵ independently represents a hydrogen atom, a C _1-8 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 Represents an aralkyl group or a phenyl group.
Each R ³ independently represents a hydrogen atom or a C _1-8 alkyl group.
L ¹ represents a single bond, a sulfur atom, or formula (1a):

{In Formula (1a), R ⁶ represents a hydrogen atom, a C _1-8 alkyl group or a C _5-8 cycloalkyl group. } Represents a divalent group.
L ² represents a C _2-8 alkylene group or formula (1b):

{In Formula (1b), L ³ represents a single bond or a C _1-8 alkylene group. * Represents bonding to the oxygen atom side. } Represents a divalent group.
One of Z ¹ and Z ² represents a hydroxy group, a C _1-8 alkyl group, a C _1-8 alkoxy group or a C _7-12 aralkyloxy group, and the other represents a hydrogen atom or a C _1-8 alkyl group Represents. ]
A thermoplastic polymer composition comprising a compound represented by the formula: maltitol and a thermoplastic polymer.   The thermoplastic polymer composition according to claim 1, wherein the total amount of the compound represented by formula (1) and maltitol is 0.001 to 3 parts by mass with respect to 100 parts by mass of the thermoplastic polymer. Formula (1):

[In Formula (1),
Each R ¹ , each R ² , R ⁴ and R ⁵ independently represents a hydrogen atom, a C _1-8 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 Represents an aralkyl group or a phenyl group.
Each R ³ independently represents a hydrogen atom or a C _1-8 alkyl group.
L ¹ represents a single bond, a sulfur atom, or formula (1a):

{In Formula (1a), R ⁶ represents a hydrogen atom, a C _1-8 alkyl group or a C _5-8 cycloalkyl group. } Represents a divalent group.
L ² represents a C _2-8 alkylene group or formula (1b):

{In Formula (1b), L ³ represents a single bond or a C _1-8 alkylene group. * Represents bonding to the oxygen atom side. } Represents a divalent group.
One of Z ¹ and Z ² represents a hydroxy group, a C _1-8 alkyl group, a C _1-8 alkoxy group or a C _7-12 aralkyloxy group, and the other represents a hydrogen atom or a C _1-8 alkyl group Represents. ]
The processing stabilizer characterized by containing the compound shown by these, and maltitol.   The compound represented by the formula (1) is 6- [3- (3-t-butyl-4-hydroxy-5-methylphenyl) propoxy] -2,4,8,10-tetra-t-butyldibenz [d, The processing stabilizer according to claim 3, which is f] [1,3,2] dioxaphosphepine.   The processing stabilizer according to claim 3 or 4, wherein the content of maltitol is 0.1 to 95% by mass in the total of the compound represented by formula (1) and maltitol. Furthermore, Formula (2):

[In Formula (2),
Each R ⁷ and each R ⁸ each independently represents a hydrogen atom or a C _1-6 alkyl group.
L ⁴ represents an n-valent C _1-24 alcohol residue which may contain a hetero atom, and n represents an integer of 1 to 4. Here, the alcohol residue represents the remaining group obtained by removing a hydrogen atom from the hydroxy group of the alcohol. ]
The processing stabilizer as described in any one of Claims 3-5 containing the compound shown by these. Furthermore, the processing stabilizer as described in any one of Claims 3-6 containing at least 1 chosen from the group which consists of a compound shown by Formula (3)-Formula (7).

[In the formula (3), each R ⁹ and each R ¹⁰ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _{7- 12} represents an aralkyl group or a phenyl group. ]

[In the formula (4), each R ¹¹ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 aralkyl group or Represents a phenyl group. ]

[In the formula (5), each R ¹² independently represents a C _1-18 alkyl group, or a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, and a C _{7. 12} represents a phenyl group which may be substituted with at least one selected from the group consisting of _-12 aralkyl groups. ]

[In Formula (6),
Each R ¹³ and each R ¹⁴ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 aralkyl group or a phenyl group. Represent.
Each L ⁵ independently represents a single bond, a sulfur atom, or formula (6a):

{In Formula (6a), R ¹⁵ and R ¹⁶ each independently represent a hydrogen atom or a C _1-7 alkyl group on condition that the total number of carbon atoms is 7 or less. } Represents a divalent group.
Each L ⁶ independently represents a C _2-8 alkylene group. ]

[In Formula (7),
Each R ¹⁷ and each R ¹⁸ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _7-12 aralkyl group or a phenyl group. Represent.
R ¹⁹ is a C _1-8 alkyl group, or at least one selected from the group consisting of a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, and a C _7-12 aralkyl group. Represents an optionally substituted phenyl group.
L ⁷ represents a single bond, a sulfur atom, or the formula (7a):

{In Formula (7a), R ²⁰ and R ²¹ each independently represent a hydrogen atom or a C _1-7 alkyl group, provided that the total number of carbon atoms is 7 or less. } Represents a divalent group. ] Furthermore, the processing stabilizer as described in any one of Claims 3-6 containing the compound shown by Formula (3).

[In the formula (3), each R ⁹ and each R ¹⁰ independently represents a hydrogen atom, a C _1-9 alkyl group, a C _5-8 cycloalkyl group, a C _6-12 alkylcycloalkyl group, a C _{7- 12} represents an aralkyl group or a phenyl group. ]   A process for producing a thermoplastic polymer composition, comprising mixing the processing stabilizer according to any one of claims 3 to 8 and a thermoplastic polymer.   Use of the processing stabilizer as described in any one of Claims 3-8 for improving the processing stability of a thermoplastic polymer composition.