Resin composition and method for stabilizing organic material

Abstract

To provide a resin composition which is designed to reduce coloring of the resin composition itself containing a polyethylene-based resin and which has excellent flowability.SOLUTION: A resin composition includes a compound 1 of the above formula, a polyethylene-based resin 2, and a polypropylene-based resin 3. A content of a structural unit derived from ethylene is 67 mol% or more with respect to a content of all structural units in the polyethylene-based resin 2. A content percentage of the polyethylene-based resin 2 is 60 mass% or more and less than 100 mass% with respect to a total content of the polyethylene-based resin 2 and the polypropylene-based resin 3.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a resin composition and a method for stabilizing an organic material. [Background technology]

[0002] Resin compositions containing polyolefin resins, particularly polyethylene-based resins and / or polypropylene-based resins, are used as materials for various industrial parts, such as bumpers, instrument panels, door trims, pillars, and other interior and exterior parts in automobile applications, parts for vacuum cleaners and televisions in home appliance applications, various housing equipment parts, various industrial parts, and various building material parts, as well as a wide variety of films such as heavy bags, shrink, general packaging, thin films, protective films (protective films), extrusion laminate films, extrusion molding films, and foam molding films. During the manufacture, processing, and use of these parts, the resin compositions constituting the parts, etc., deteriorate due to the action of heat, oxygen, and the like, and the strength properties of the organic material decrease due to phenomena such as molecular scission and molecular crosslinking, and the commercial value may be significantly impaired.

[0003] Regarding resin compositions containing a polyethylene-based resin and / or a polypropylene-based resin, for example, Patent Documents 1 and 2 describe resin compositions containing a propylene polymer and an ethylene-propylene copolymer. Patent Document 2 describes a thermoplastic polymer composition containing a thermoplastic polymer and a specific compatibilizer. Patent Document 3 describes a polymer composition containing an ethylene-based polymer and an ethylene-α-olefin copolymer. Patent Document 4 describes a thermoplastic resin composition containing a propylene-based copolymer having propylene units and ethylene units, and a crystalline polypropylene-based resin. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-184593 A [Patent Document 2] Patent Publication No. 2021-102747 [Patent Document 3] JP 2009-1780 A [Patent Document 4] JP 2018-135484 A Summary of the Invention [Problem to be solved by the invention]

[0005] The above-mentioned parts may require weight reduction, and one method for weight reduction is to thin the parts. However, when the resin composition is deteriorated by the action of heat, oxygen, etc. and does not have flowability, it may be difficult to mold a part with a thin shape. In addition, when the resin composition film is produced, if the resin composition has low flowability, the film thickness may vary or defects may occur, and the quality of the product may be impaired. Furthermore, if the resin composition has low flowability, the productivity of the above-mentioned parts may decrease. Therefore, although various resin compositions such as those described above have been studied, there is still a demand for improving the flowability of resin compositions containing polyethylene-based resins and polypropylene-based resins. In particular, the present inventors have focused on the fact that resin compositions containing polyethylene-based resins tend to have low flowability during processing, and have attempted to suppress such a decrease in the flowability of the resin composition. Furthermore, the resin composition containing a polyethylene-based resin and a polypropylene-based resin is used without coloring or, in some cases, colored with a pigment or the like, depending on the properties required for the part, etc., but in either case, it is desirable that discoloration of the resin composition itself, such as yellowing, is suppressed, and it is desirable that coloring (e.g., yellowness) derived from the resin composition is reduced.

[0006] Therefore, an object of the present invention is to provide a resin composition containing a polyethylene resin, which has reduced coloration of the resin composition itself and has excellent flowability. [Means for solving the problem]

[0007] The present inventors have conducted detailed studies on various compounds in order to solve the above problems, and have found that a resin composition containing a specific compound and a resin is effective, thereby completing the present invention. That is, the present invention includes the following preferred embodiments.

[0008] [1] Formula (1): [ka] [In formula (1), R 1 , R 2 , R 4 and R 5 each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group, R 3 each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, X is a single bond, a sulfur atom or -CH(-R 6 )-group(R 6 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms; A is an alkylene group having 1 to 8 carbon atoms or *-C(=O)-R 7 -group(R 7 represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents a bond on the oxygen side, one of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. A compound (1) represented by the formula: A polyethylene resin (2); A polypropylene-based resin (3), The amount of structural units derived from ethylene relative to the amount of all structural units in the polyethylene resin (2) is 67 mol% or more, The ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60% by mass or more and less than 100% by mass. Resin composition. [2] The resin composition according to [1], wherein the amount of the compound (1) is 0.01 to 3 mass % based on the total amount of the polyethylene resin (2) and the polypropylene resin (3). [3] The resin composition according to [1] or [2], wherein the amount of structural units derived from propylene relative to the amount of all structural units in the polypropylene-based resin (3) is 60 mol % or more. [4] The resin composition according to any one of [1] to [3], wherein the amount of structural units derived from ethylene relative to the amount of all structural units in the polyethylene resin (2) is 80 mol % or more. [5] The resin composition according to any one of [1] to [4], wherein the total amount of the compound (1), the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60 mass% or more based on the total amount of the resin composition. [6] The resin composition according to any one of [1] to [5], wherein the ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60 mass% or more and 99.9 mass% or less. [7] The resin composition according to any one of [1] to [6], wherein the ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 80 mass% or more and 99.9 mass% or less. [8] The resin composition according to any one of [1] to [7], wherein the ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 80 mass% or more and 99.5 mass% or less. [9] The resin composition according to any one of [1] to [8], wherein in the polyethylene-based resin (2) and / or the polypropylene-based resin (3), the amount of constituent units derived from diene monomers relative to the amount of all constituent units is 3 mol % or less.

[10] The density of the polyethylene resin (2) is 875 kg / m 3 More than 980kg / m 3The resin composition according to any one of [1] to [9], which is:

[11] The resin composition according to any one of [1] to

[10] , wherein the polyethylene resin (2) is a high-density polyethylene, a low-density polyethylene or a linear low-density polyethylene.

[12] An organic material containing a polyethylene resin (2) and a polypropylene resin (3) is treated with a compound represented by the formula (1): [ka] [In formula (1), R 1 , R 2 , R 4 and R 5 each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group, R 3 each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, X is a single bond, a sulfur atom or -CH(-R 6 )-group(R 6 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms; A is an alkylene group having 1 to 8 carbon atoms or *-C(=O)-R 7 -group(R 7 represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents a bond on the oxygen side, one of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Adding a compound (1) represented by the formula: wherein the amount of structural units derived from ethylene relative to the amount of all structural units in the polyethylene resin (2) is 67 mol % or more; The ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60% by mass or more and less than 100% by mass. Methods for stabilizing organic materials. Effect of the Invention

[0009] According to the present invention, it is possible to provide a resin composition which has reduced coloration of the resin composition itself and is excellent in flowability. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the embodiments of the present invention will be described in detail. Note that the scope of the present invention is not limited to the embodiments described here, and various modifications can be made without departing from the spirit of the present invention. In addition, when multiple upper and lower limit values ​​are described for a specific feature, any upper and lower limit values ​​can be combined to form a suitable numerical range.

[0011] [Compound (1)] The resin composition of the present invention is represented by the formula (1): [ka] [In formula (1), R 1 , R 2 , R 4 and R 5 each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group, R 3 each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, X is a single bond, a sulfur atom or -CH(-R 6 )-group(R 6 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms; A is an alkylene group having 1 to 8 carbon atoms or *-C(=O)-R 7 -group(R 7 represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents a bond on the oxygen side, one of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. The resin composition comprises a compound (1) represented by the formula (1): a polyethylene-based resin (2) having an amount of structural units derived from ethylene of 67 mol % or more, and a polypropylene-based resin (3), and the proportion of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60 mass % or more and less than 100 mass %.

[0012] A resin composition containing a compound (1) represented by formula (1), a polyethylene resin (2) having 67 mol% or more of structural units derived from ethylene, and a polypropylene resin (3), in which the ratio of the amount of the polyethylene resin (2) to the total amount of the polyethylene resin (2) and the polypropylene resin (3) is 60 mass% or more and less than 100 mass%, is surprisingly unlikely to cause a decrease in fluidity during processing of the resin composition, and is unlikely to cause coloring of the resin composition itself. The reason for this is unclear, but it is believed that the compound (1) is effective in improving stability, and that the interaction with the polyethylene resin (2) and the polypropylene resin (3) inhibits the compound (1) and the like from changing into a colored substance. When a certain amount of polypropylene is present for a certain polyethylene, it is believed that the polypropylene or a component derived from polypropylene captures radicals such as phenoxy radicals that may be generated in the resin composition, inhibiting the generation of quinone bodies that cause coloring, and therefore inhibiting coloring. It is to be noted that the present invention is not limited to the above mechanism in any way.

[0013] The resin composition of the present invention may contain one type of compound (1) represented by formula (1), or may contain two or more types of compound (1) represented by formula (1). 1 , R 2 , R 4 and R 5each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group. 1 may be the same or different. 2 and R 3 The same applies to.

[0014] Examples of the alkyl group having 1 to 8 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, a t-butyl group, an n-pentyl group, a t-amyl group, a 2-methylbutyl group, a 3-methylbutyl group, a 2-ethylpropyl group, an n-hexyl group, an n-heptyl group, an isoheptyl group, an n-octyl group, an isooctyl group, and a 2-ethylhexyl group.

[0015] Examples of the cycloalkyl group having 5 to 8 carbon atoms include a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, and a cyclooctyl group.

[0016] Examples of the alkylcycloalkyl group having 6 to 12 carbon atoms include a 1-methylcyclopentyl group, a 1-methylcyclohexyl group, and a 1-methyl-4-i-propylcyclohexyl group.

[0017] Examples of the aralkyl group having 7 to 12 carbon atoms include a benzyl group, an α-methylbenzyl group, and an α,α-dimethylbenzyl group.

[0018] R 1 , R 2 and R 4 is preferably an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, or an alkylcycloalkyl group having 6 to 12 carbon atoms. R 1 and R 4 is more preferably a t-alkyl group such as a t-butyl group, a t-amyl group, or a t-octyl group, a cyclohexyl group, or a 1-methylcyclohexyl group. R 2is more preferably an alkyl group having 1 to 5 carbon atoms, such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a sec-butyl group, a t-butyl group, or a t-amyl group, and even more preferably a methyl group, a t-butyl group, or a t-amyl group.

[0019] R 5 is preferably a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms, and more preferably a hydrogen atom, or an alkyl group having 1 to 5 carbon atoms, such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a sec-butyl group, a t-butyl group, or a t-amyl group.

[0020] R in formula (1) 3 R each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Examples of the alkyl group having 1 to 8 carbon atoms include the same as those mentioned above. 3 is preferably a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and more preferably a hydrogen atom or a methyl group.

[0021] X in formula (1) is a single bond, a sulfur atom, or -CH(-R 13 )-group(R 13 R represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms. 13 Examples of the alkyl group having 1 to 8 carbon atoms and the cycloalkyl group having 5 to 8 carbon atoms represented by the following formula (1) include the same as those mentioned above. X is preferably a methylene group substituted with an alkyl group having 1 to 4 carbon atoms, such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, or a t-butyl group, or a single bond, and more preferably a single bond.

[0022] In formula (1), A is an alkylene group having 1 to 8 carbon atoms or *-C(=O)-R 14 -group(R 14represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents a bond on the oxygen side. Examples of the alkylene group having 1 to 8 carbon atoms include a methylene group, an ethylene group, a propylene group, a butylene group, a pentamethylene group, a hexamethylene group, an octamethylene group, and a 2,2-dimethyl-1,3-propylene group. A is preferably a propylene group. *-C(=O)-R 14 The * in the - group indicates that the carbonyl group is bonded to the oxygen atom of the phosphite group. 14 is preferably a single bond or an ethylene group.

[0023] In formula (1), one of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Here, examples of the alkyl group having 1 to 8 carbon atoms include the same as those mentioned above. Examples of the aralkyloxy group having 7 to 12 carbon atoms include a benzyloxy group, an α-methylbenzyloxy group, and an α,α-dimethylbenzyloxy group. Preferably, one of Y and Z is a hydroxyl group, and the other is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and more preferably, Y is a hydroxyl group, and Z is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.

[0024] Specific examples of the compound represented by formula (1) include 2,4,8,10-tetra-t-butyl-6-[3-(3-methyl-4-hydroxy-5-t-butylphenyl)propoxy]dibenzo[d,f][1,3,2]dioxaphosphepine, 6-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propoxy]-2,4,8,10-tetra-t-butyldibenzo[d,f][1,3,2]dioxaphosphepine, Examples of the compound represented by formula (1) include 6-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propoxy]-4,8-di-t-butyl-2,10-dimethyl-12H-dibenzo[d,g][1,3,2]dioxaphosphocin, 6-[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionyloxy]-4,8-di-t-butyl-2,10-dimethyl-12H-dibenzo[d,g][1,3,2]dioxaphosphocin, etc. The compound represented by formula (1) is preferably 2,4,8,10-tetra-t-butyl-6-[3-(3-methyl-4-hydroxy-5-t-butylphenyl)propoxy]dibenzo[d,f][1,3,2]dioxaphosphepine.

[0025] The compound represented by formula (1) may be a commercially available product, such as Sumilizer (registered trademark) GP (manufactured by Sumitomo Chemical Co., Ltd.).

[0026] [Polyethylene resin (2)] The resin composition of the present invention further contains a polyethylene resin (2), and the polyethylene resin (2) is a polyethylene resin in which the amount of constituent units derived from ethylene relative to the amount of all constituent units is 67 mol% or more. The resin composition may contain one type of polyethylene resin (2), or may contain two or more types of polyethylene resin (2). The amount of constituent units derived from ethylene relative to the amount of all constituent units in the polyethylene resin (2) is 67 mol% or more, preferably 70 mol% or more, more preferably 80 mol% or more, even more preferably 85 mol% or more, and particularly preferably 90 mol% or more, with the upper limit being 100 mol% or less. The amount of constituent units derived from ethylene relative to the amount of all constituent units can be determined by nuclear magnetic resonance spectroscopy (NMR method) or infrared spectroscopy (IR method).

[0027] The polyethylene-based resin (2) includes polyethylene (ethylene homopolymer) and copolymers of ethylene with other monomers.

[0028] The polyethylene resin (2) is not particularly limited as long as the amount of constituent units derived from ethylene relative to the amount of all constituent units is 67 mol% or more, and may be a homopolyethylene in which all constituent units are derived from ethylene, or a copolymer of ethylene and one or more other monomers. Examples of other monomers include α-olefins, conjugated dienes (e.g., butadiene and isoprene), non-conjugated dienes (e.g., 1,4-pentadiene), acrylic acid, acrylic acid esters (e.g., methyl acrylate and ethyl acrylate), methacrylic acid, methacrylic acid esters (e.g., methyl methacrylate and ethyl methacrylate), vinyl acetate, etc.

[0029] The polyethylene resin (2) may be, for example, an ethylene-α-olefin copolymer, and is preferably low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), or high-density polyethylene (HDPE).

[0030] The density of the polyethylene resin (2) is preferably 875 kg / m from the viewpoint of increasing mechanical strength and rigidity. 3 More than 980kg / m 3 Less than or equal to 880 kg / m 3 More than 970kg / m 3 Less than 900 kg / m, more preferably 900 kg / m 3 More than 970kg / m 3 In this specification, the density of the polyethylene resin (2) is measured by the method A specified in JIS K7112-1980. When the resin composition contains the polyethylene resin (2) having a density in the above range, it is considered possible to provide a resin composition that is excellent in flowability and coloration resistance during processing, as well as good in mechanical properties.

[0031] The ethylene-α-olefin copolymer is a copolymer containing a structural unit derived from ethylene and a structural unit derived from an α-olefin. Examples of the α-olefin include propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-dodecene, 4-methyl-1-pentene, 4-methyl-1-hexene, etc., which may be used alone or in combination of two or more. The α-olefin is preferably an α-olefin having 3 to 20 carbon atoms, more preferably an α-olefin having 4 to 8 carbon atoms, and even more preferably at least one α-olefin selected from 1-butene, 1-hexene, 1-octene, and 4-methyl-1-pentene.

[0032] The polyethylene resin (2) has a melt flow rate (MFR) of 0.1 to 20 g / 10 min. From the viewpoint of the fluidity and processability of the resin composition, the MFR is preferably 0.3 g / 10 min or more, more preferably 0.5 g / 10 min or more. From the viewpoint of mechanical strength, the MFR is preferably 10 g / 10 min or less, more preferably 5 g / 10 min or less. The melt flow rate is a value measured by Method A under the conditions of a temperature of 190° C. and a load of 21.18 N according to the method specified in JIS K7210-2014.

[0033] The content of the polyethylene resin (2) relative to the total amount of the resin composition is preferably 60 to 99.9 mass%, more preferably 70 to 99.5 mass%, and even more preferably 80 to 99.0 mass%, from the viewpoints of fluidity, coloration resistance, and mechanical strength of the resin composition.

[0034] [Polypropylene resin (3)] The resin composition of the present invention further contains a polypropylene-based resin (3). In this specification, a polypropylene-based resin is a polypropylene-based resin in which the amount of structural units derived from propylene is the largest among all structural units contained in the polypropylene-based resin (3). For example, in a resin, when the amount of structural units derived from propylene relative to the amount of all structural units exceeds 50 mol%, the resin is a polypropylene-based resin (3). In addition, for example, in a resin having structural units derived from multiple types of monomers, when the amount of structural units derived from each monomer is compared and the amount of structural units derived from polypropylene is the largest compared to the amount of each of the other structural units, the resin is also a polypropylene-based resin (3).

[0035] The resin composition may contain one type of polypropylene resin (3), or may contain two or more types of polypropylene resin (3). The amount of the propylene-derived structural units relative to the amount of all structural units in the polypropylene resin (3) is preferably more than 50 mol%, more preferably 60 mol% or more, even more preferably 70 mol% or more, even more preferably 80 mol% or more, and particularly preferably 90 mol% or more, with the upper limit being 100 mol% or less, from the viewpoint of the fluidity, coloration resistance, and mechanical strength of the resin composition. The amount of the propylene-derived structural units relative to the amount of all structural units can be determined by nuclear magnetic resonance (NMR) or infrared spectroscopy (IR).

[0036] Examples of polypropylene-based resins (3) include polypropylene (propylene homopolymer) and copolymers of propylene with other monomers, such as isotactic polypropylene, syndiotactic polypropylene, atactic polypropylene, propylene-α-olefin copolymer, and ethylene-propylene copolymer.

[0037] The polypropylene resin (3) is a resin in which the amount of structural units derived from propylene is the largest when comparing the amounts of each structural unit contained in the resin. There are no particular limitations on such a resin, and it may be a homopolypropylene in which all structural units are derived from propylene, or a copolymer of propylene and one or more other monomers. Examples of other monomers include ethylene, α-olefins, conjugated dienes (e.g., butadiene and isoprene), non-conjugated dienes (e.g., 1,4-pentadiene), acrylic acid, acrylic acid esters (e.g., methyl acrylate and ethyl acrylate), methacrylic acid, methacrylic acid esters (e.g., methyl methacrylate and ethyl methacrylate), vinyl acetate, etc.

[0038] The melt flow rate (MFR) of the polypropylene resin (3) is preferably 0.1 g / 10 min to 150 g / 10 min, more preferably 0.5 g / 10 min to 100 g / 10 min, and even more preferably 1 g / 10 min to 50 g / 10 min, from the viewpoint of increasing the fluidity and mechanical strength of the resin composition. The melt flow rate is a value measured by the method A under the conditions of a temperature of 230° C. and a load of 21.18 N according to the method specified in JIS K7210-2014.

[0039] From the viewpoint of suppressing coloration of the resin composition itself, the content of the polypropylene-based resin (3) is preferably 0.01 to 50 mass%, more preferably 0.1 to 40 mass%, even more preferably 0.5 to 25 mass%, and even more preferably 1.0 to 15 mass%, based on the total amount of the resin composition.

[0040] In the polyethylene resin (2) and / or the polypropylene resin (3), the amount of the constituent units derived from the diene monomer relative to the amount of all constituent units is preferably as small as possible, for example, preferably 3 mol % or less, more preferably 2 mol % or less, and even more preferably 1 mol % or less.

[0041] [Resin composition] As described above, the resin composition of the present invention is a resin composition comprising the compound (1) represented by formula (1), the polyethylene-based resin (2) in which the amount of structural units derived from ethylene relative to the amount of all structural units is 67 mol % or more, and the polypropylene-based resin (3), and the proportion of the amount of the polyethylene-based resin (2) relative to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60 mass % or more and less than 100 mass %.

[0042] When the ratio of the amount of the polyethylene resin (2) to the total amount of the polyethylene resin (2) and the polypropylene resin (3) contained in the resin composition is less than 60% by mass, or when it is 100% by mass, the resin composition itself is easily colored, and the color derived from the resin composition tends to be strong. From the viewpoint of suppressing coloration of the resin composition itself, the ratio of the amount of the polyethylene resin (2) to the total amount of the polyethylene resin (2) and the polypropylene resin (3) contained in the resin composition is preferably 60% by mass or more and 99.9% by mass or less, more preferably 80% by mass or more and 99.9% by mass or less, even more preferably 80% by mass or more and 99.5% by mass or less, and even more preferably 85% by mass or more and 99.0% by mass or less.

[0043] The amount of compound (1) relative to the total amount of polyethylene resin (2) and polypropylene resin (3) contained in the resin composition is preferably 0.01 to 3 mass%, more preferably 0.02 to 1 mass%, even more preferably 0.03 to 0.5 mass%, and still more preferably 0.05 to 0.3 mass%, from the viewpoint of suppressing coloration of the resin composition itself.

[0044] The total amount of compound (1), polyethylene-based resin (2) and polypropylene-based resin (3) relative to the total amount of the resin composition is, from the viewpoint of suppressing coloration of the resin composition itself, preferably 60 mass% or more, more preferably 70 mass% or more, even more preferably 80 mass% or more, still more preferably 90 mass% or more, and may be 95 mass% or more, 98 mass% or more, 99 mass% or more, etc.

[0045] From the viewpoint of easily improving the quality of a molded article obtained from the resin composition of the present invention, the YI of the resin composition of the present invention is preferably 20 or less, more preferably 15 or less, even more preferably 12 or less, even more preferably 10 or less, particularly preferably 8 or less, and most preferably 6 or less. The YI of the resin composition may be measured, for example, by using a molded article (sheet) obtained by press molding the resin composition as a measurement sample and using a color difference meter, and can be measured, for example, by the method described in the Examples.

[0046] [Other resins] As described above, the resin composition of the present invention contains compound (1), polyethylene-based resin (2), and polypropylene-based resin (3), and the amount of constituent units derived from ethylene relative to the amount of all constituent units in the polyethylene-based resin (2) is 67 mol% or more, and the ratio of the amount of polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60 mass% or more and less than 100 mass%, but the resin composition may further contain one or more other resins and / or additives different from the polyethylene-based resin (2) and the polyethylene-based resin (3).

[0047] Other resins include: (1) A polyethylene resin having a content of structural units derived from ethylene of less than 67 mol %; (2) A resin that contains structural units derived from polypropylene and other structural units having 4 or more carbon atoms, but the content of structural units derived from propylene is less than the total amount of other structural units having 4 or more carbon atoms. (3) methylpentene polymers, (4) EEA (ethylene / ethyl acrylate copolymer) resin, (5) ethylene / vinyl acetate copolymer resin, (6) Polystyrenes, such as polystyrene, poly(p-methylstyrene), poly(α-methylstyrene), (7) AS (acrylonitrile / styrene copolymer) resin, (8) ABS (acrylonitrile / butadiene / styrene copolymer) resin, (9) AAS (special acrylic rubber / acrylonitrile / styrene copolymer) resin, (10) ACS (acrylonitrile / chlorinated polyethylene / styrene copolymer) resin,

[0048] (11) Chlorinated polyethylene, polychloroprene, chlorinated rubber, (12) Polyvinyl chloride, polyvinylidene chloride, (13) methacrylic resin, (14) ethylene / vinyl alcohol copolymer resin, (15) Fluorine resin, (16) Polyacetal, (17) Grafted polyphenylene ether resins and polyphenylene sulfide resins, (18) polyurethane, (19) polyamide, (20) Polyester resins, such as polyethylene terephthalate, polybutylene terephthalate,

[0049] (21) polycarbonate, (22) polyacrylate, (23) Polysulfone, polyetheretherketone, polyethersulfone, (24) Thermoplastic resins such as aromatic polyester resins, (25) epoxy resin, (26) diallyl phthalate prepolymer, (27) silicone resin, (28) unsaturated polyester resins, (29) Acrylic modified benzoguanamine resin, (30) benzoguanamine / melamine resin, (31) Thermosetting resins such as urea resins,

[0050] (32) polybutadiene, (33) 1,2-polybutadiene, (34) polyisoprene, (35) styrene / butadiene copolymers, (36) butadiene / acrylonitrile copolymer, (37) ethylene / propylene copolymers, (38) silicone rubber, (39) epichlorohydrin rubber, (40) acrylic rubber, (41) Natural rubber,

[0051] (42) Chlorinated rubber paints, (43) Polyester resin paint, (44) Urethane resin paint, (45) Epoxy resin paint, (46) Acrylic resin paint, (47) Vinyl resin paints, (48) Amino alkyd resin paints, (49) Alkyd resin paints, (50) Nitrocellulose resin paint, (51) Oil-based paints, (52) wax, (53) Lubricants, etc.

[0052] [Other Additives] In addition to the compound (1), the polyethylene resin (2), and the polypropylene resin (3), the resin composition may further contain other additives as necessary, such as sulfur-based antioxidants, phosphorus-based antioxidants, antiaging agents, ultraviolet absorbers, light stabilizers, peroxide scavengers, polyamide stabilizers, hydroxyamines, lubricants, plasticizers, flame retardants, nucleating agents, metal deactivators, antistatic agents, pigments, fillers, pigments, antiblocking agents, surfactants, processing aids, foaming agents, emulsifiers, gloss agents, calcium stearate, hydrotalcite, and the like. Neutralizing agents, color improvers such as 9,10-dihydro-9-oxa-10-phosphophenanthrene-10-oxide, and auxiliary stabilizers such as benzofurans and indolines described in U.S. Patents 4,325,853, 4,338,244, 5,175,312, 5,216,053, 5,252,643, and 4,316,611, DE-A-4,316,622, 4,316,876, EP-A-589,839, and EP-A-591,102, can also be added. These additives may be used alone or in combination of two or more.

[0053] Examples of phenol-based antioxidants include the following: As the phenol-based antioxidant, the following compounds may be used alone or in combination of two or more kinds. Note that the compounds corresponding to formula (1) are excluded. (1) Examples of alkylated monophenols 2,6-dicyclopentyl-4-methylphenol, 2-(α-methylcyclohexyl)-4,6-dimethylphenol, 2,6-dioctadecyl-4-methylphenol, 2,4,6-tricyclohexylphenol, 2,6-di-t-butyl-4-methoxymethylphenol, 2,4-dimethyl-6-(1'-methylundecyl-1'-yl)phenol, 2,4-dimethyl-6-(1'-methylheptadecyl-1'-yl)phenol, 2,4-dimethyl-6-(1'-methyltridecyl-1'-yl)phenol, and mixtures thereof.

[0054] (2) Examples of alkylthiomethylphenols 2,4-dioctylthiomethyl-6-t-butylphenol, 2,4-dioctylthiomethyl-6-methylphenol, 2,4-dioctylthiomethyl-6-ethylphenol, 2,6-didodecylthiomethyl-4-nonylphenol, and mixtures thereof. (3) Examples of hydroquinone and alkylated hydroquinone 2,6-di-t-butyl-4-methoxyphenol, 2,5-di-t-butylhydroquinone, 2,5-di-t-amylhydroquinone, 2,6-diphenyl-4-octadecyloxyphenol, 2,6-di-t-butylhydroquinone, 2,5-di-t-butyl-4-hydroxyanisole, 3,5-di-t-butyl-4-hydroxyphenyl stearate, bis(3,5-di-t-butyl-4-hydroxyphenyl)adipate, and mixtures thereof.

[0055] (4) Examples of tocopherols α-tocopherol, β-tocopherol, γ-tocopherol, δ-tocopherol and mixtures thereof. (5) Examples of hydroxylated thiodiphenyl ethers 2,2'-thiobis(6-t-butylphenol), 2,2'-thiobis(4-methyl-6-t-butylphenol), 2,2'-thiobis(4-octylphenol), 4,4'-thiobis(3-methyl-6-t-butylphenol), 4,4'-thiobis(2-methyl-6-t-butylphenol), 4,4'-thiobis(3,6-di-t-amylphenol), 4,4'-(2,6-dimethyl-4-hydroxyphenyl) disulfide, etc.

[0056] (6) Examples of alkylidene bisphenols and their derivatives 2,2'-methylenebis(4-methyl-6-t-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-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[4,6-(α,α- dimethylbenzyl)-4-nonylphenol], 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-t-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-dodecylmercaptobutane, 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-t-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(5-t-butyl-4-hydroxy-2-methylphenyl)pentane, 2-t-butyl-6-(3'-t-butyl-5'-methyl-2'-hydroxybenzyl)-4-methylphenyl acrylate, 2,4-di-t-pentyl-6-[1-(2-hydroxy-3,5-di-t-pentylphenyl)ethyl]phenyl acrylate and mixtures thereof.

[0057] (7) Examples of O-, N- and S-benzyl derivatives 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-hydroxybenzyl)sulfide, isooctyl-3,5-di-t-butyl-4-hydroxybenzyl mercaptoacetate, and mixtures thereof. (8) Examples of hydroxybenzylated malonate derivatives Dioctadecyl-2,2-bis(3,5-di-t-butyl-2-hydroxybenzyl)malonate, dioctadecyl-2-(3-t-butyl-4-hydroxy-5-methylbenzyl)malonate, didodecylmercaptoethyl-2,2-bis(3,5-di-t-butyl-4-hydroxybenzyl)malonate, bis[4-(1,1,3,3-tetramethylbutyl)phenyl]-2,2-bis(3,5-di-t-butyl-4-hydroxybenzyl)malonate, and mixtures thereof. (9) Examples of aromatic hydroxybenzyl derivatives 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene, 1,4-bis(3,5-di-t-butyl-4-hydroxybenzyl)-2,3,5,6-tetramethylbenzene, 2,4,6-tris(3,5-t-butyl-4-hydroxybenzyl)phenol and mixtures thereof.

[0058] (10) Examples of triazine derivatives 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-butylphenoxy)-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)iso cyanurate, tris(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate, 2,4,6-tris(3,5-di-t-butyl-4-hydroxyphenylethyl)-1,3,5-triazine, 2,4,6-tris(3,5-di-t-butyl-4-hydroxyphenylpropyl)-1,3,5-triazine, tris(3,5-dicyclohexyl-4-hydroxybenzyl)isocyanurate, tris[2-(3',5'-di-t-butyl-4'-hydroxycinnamoyloxy)ethyl]isocyanurate and mixtures thereof.

[0059] (11) Examples of benzylphosphonate derivatives 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 salts of 3,5-di-t-butyl-4-hydroxybenzylphosphonic acid monoester, and mixtures thereof. (12) Examples of acylaminophenol derivatives 4-hydroxylauric acid anilide, 4-hydroxystearic acid anilide, octyl-N-(3,5-di-t-butyl-4-hydroxyphenyl)carbamate, and mixtures thereof. (13) Examples of esters of β-(3,5-di-t-butyl-4-hydroxyphenyl)propionic acid with the following monohydric or polyhydric alcohols 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[2,2,2]octane, and mixtures thereof.

[0060] (14) Examples of esters of β-(5-t-butyl-4-hydroxy-3-methylphenyl)propionic acid with the following monohydric or polyhydric alcohols 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[2,2,2]octane, and mixtures thereof. (15) Examples of esters of β-(3,5-dicyclohexyl-4-hydroxyphenyl)propionic acid with the following monohydric or polyhydric alcohols 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[2,2,2]octane, and mixtures thereof.

[0061] (16) Examples of esters of 3,5-di-t-butyl-4-hydroxyphenylacetic acid with the following monohydric or polyhydric alcohols: 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[2,2,2]octane, and mixtures thereof. (17) Examples of amides of β-(3,5-di-t-butyl-4-hydroxyphenyl)propionic acid 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]trimethylenediamine, and mixtures thereof.

[0062] Examples of sulfur-based antioxidants include the following: Dilauryl 3,3'-thiodipropionate, tridecyl 3,3'-thiodipropionate, dimyristyl 3,3'-thiodipropionate, distearyl 3,3'-thiodipropionate, lauryl stearyl 3,3'-thiodipropionate, neopentanetetrayltetrakis (3-laurylthiopropionate), etc.

[0063] Examples of phosphorus-based antioxidants include the following: As the phosphorus-based antioxidant, the following compounds may be used alone or in combination of two or more kinds. Triphenyl phosphite, tris(nonylphenyl)phosphite, tris(2,4-di-t-butylphenyl)phosphite, trilauryl phosphite, trioctadecyl phosphite, distearyl pentaerythritol diphosphite, diisodecyl pentaerythritol diphosphite, bis(2,4-di-t-butylphenyl)pentaerythritol diphosphite, bis(2,4-di-t-butyl-6-methylphenyl)pentaerythritol diphosphite, bis(2,6-di-t-butyl-4-methylphenyl)pentaerythritol diphosphite, bis(2,4,6-tri-t-butylphenyl)pentaerythritol Diphosphite, tristearyl sorbitol triphosphite, tetrakis(2,4-di-t-butylphenyl)-4,4'-diphenylene diphosphonite, 2,2'-methylenebis(4,6-di-t-butylphenyl) 2-ethylhexyl phosphite, 2,2'-ethylidenebis(4,6-di-t-butylphenyl) fluoro phosphite, bis(2,4-di-t-butyl-6-methylphenyl) ethyl phosphite, bis(2,4-di-t-butyl-6-methylphenyl) methyl phosphite, 2-(2,4,6-tri-t-butylphenyl)-5-ethyl-5-butyl-1,3,2-oxaphosphorinane, 2,2',2''-nitrilo[triethyl-tris(3,3',5,5'-tetra-t-butyl-1,1'-biphenyl-2,2'-diyl] Phosphite, 6-[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-t-butyldibenz[d,f][1,3,2]dioxaphosphepine, and mixtures thereof.

[0064] Examples of the antiaging agent include quinoline-based antiaging agents such as polymers of 2,2,4-trimethyl-1,2-dihydroquinoline; monophenol-based antiaging agents such as 2,6-di-t-butyl-4-methylphenol and styrenated phenol; and bis-, tris-, and polyphenol-based antiaging agents such as tetrakis-[methylene-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate]methane. These may be used alone or in combination of two or more. Among them, quinoline-based antiaging agents are preferred.

[0065] Examples of the ultraviolet absorbing agent include the following: As the ultraviolet absorbing agent, the following compounds may be used alone or in combination of two or more kinds. (1) Examples of salicylate derivatives 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'-hydroxybenzoate, 2-methyl-4,6-di-t-butylphenyl 3',5'-di-t-butyl-4'-hydroxybenzoate, and mixtures thereof. (2) Examples of 2-hydroxybenzophenone derivatives 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 and mixtures thereof.

[0066] (3) Examples of 2-(2'-hydroxyphenyl)benzotriazole 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'-s-butyl-2'-hydroxy-5'-t-butylphenyl)benzotriazole, 2-(2'-hydroxy-4'-octyloxyphenyl)benzotriazole, 2-(3',5'-di-t-amyl-2'-hydroxyphenyl)benzotriazole 2-[2'-hydroxy-3',3'-bis(α,α-dimethylbenzyl)phenyl]-2H-benzotriazole, 2-[(3'-t-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-3'-hydroxy-5'-(2-methoxycarbonylethyl)phenyl]-5-chlorobenzotriazole, 2-[3'-t-butyl-2'-hydroxy-5'-(2-methoxycarbonylethyl)phenyl] Benzotriazole, 2-[3'-t-butyl-2'-hydroxy-5-(2-octyloxycarbonylethyl)phenyl]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'-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-tetramethylbutyl)phenol, 2,2'-methylenebis[4-t-butyl-6-(2H-benzotriazol-2-yl)phenol], poly(3-11)(ethylene glycol) and 2-[3'-t-butyl-2'-hydroxy-5'-(2-methoxycarbonylethyl)phenyl]benzotriazole condensation product, poly(3-11)(ethylene glycol) and methyl 3-[3-(2H-benzotriazol-2-yl)-5-t-butyl-4-hydroxyphenyl]propionate condensation product, 2-ethylhexyl 3-[3-t-butyl-5-(5-chloro-2H-benzotriazol-2-yl)-4-hydroxyphenyl]propionate, octyl 3-[3-t-butyl-5-(5-chloro-2H-benzotriazol-2-yl)-4-hydroxyphenyl]propionate, methyl 3-[3-t-butyl-5-(5-chloro-2H-benzotriazol-2-yl)-4-hydroxyphenyl]propionate, 3-[3-t-butyl-5-(5-chloro-2H-benzotriazol-2-yl)-4-hydroxyphenyl]propionic acid and mixtures thereof.

[0067] Examples of the light stabilizer include the following: As the light stabilizer, the following compounds may be used alone or in combination of two or more kinds. (1) Examples of hindered amine light stabilizers 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-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) 2,2-bis(3,5-di-t-butyl-4-hydroxybenzyl)-2-butylmalonate, 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)propionyl Pionamide, 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-butanetetracarboxylate, mixed esters of 1,2,3,4-butanetetracarboxylic acid with 1,2,2,6,6-pentamethyl-4-piperidinol and 1-tridecanol,

[0068] Mixed esters of 1,2,3,4-butanetetracarboxylic acid with 2,2,6,6-tetramethyl-4-piperidinol and 1-tridecanol, mixed esters of 1,2,3,4-butanetetracarboxylic acid with 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, mixed esters of 1,2,3,4-butanetetracarboxylic acid with 2,2,6,6-tetramethyl-4-piperidinol and 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5·5]undecane mixed esters 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)], N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylenediamine 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,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',4,7-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-(1,2,2,6,6-pentamethyl-4-piperidyl)amino)-1,3,5-triazin-2-yl]-4,7-diazadecane-1,10-diamine and mixtures thereof.

[0069] (2) Examples of acrylate-based light stabilizers Ethyl α-cyano-β,β-diphenylacrylate, isooctyl α-cyano-β,β-diphenylacrylate, methyl α-carbomethoxycinnamate, methyl α-cyano-β-methyl-p-methoxycinnamate, butyl α-cyano-β-methyl-p-methoxycinnamate, methyl α-carbomethoxy-p-methoxycinnamate and N-(β-carbomethoxy-β-cyanovinyl)-2-methylindoline and mixtures thereof. (3) Examples of nickel-based light stabilizers Nickel complex of 2,2'-thiobis-[4-(1,1,3,3-tetramethylbutyl)phenol], nickel dibutyldithiocarbamate, nickel salts of monoalkyl esters, nickel complex of ketoximes and mixtures thereof.

[0070] (4) Examples of oxamide light stabilizers 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-butyl-2'-ethoxyanilide, 2-ethoxy-5,4'-di-t-butyl-2'-ethyloxanilide, and mixtures thereof. (5) Examples of 2-(2-hydroxyphenyl)-1,3,5-triazine light stabilizers 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-bi bis(4-methylphenyl)-1,3,5-triazine, 2-(2-hydroxy-4-dodecyloxyphenyl)-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[2-hydroxy-4-(2-hydroxy-3-butyloxypropoxy)phenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[2-hydroxy-4-(2-hydroxy-3-octyloxypropoxy)phenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine and mixtures thereof.

[0071] Examples of metal deactivators include the following: N,N'-diphenyloxamide, N-salicylal-N'-salicyloylhydrazine, N,N'-bis(salicyloyl)hydrazine, N,N'-bis(3,5-di-t-butyl-4-hydroxyphenylpropionyl)hydrazine, 3-salicyloylamino-1,2,4-triazole, bis(benzylidene)oxalyl dihydrazide, oxanilide, isophthaloyl dihydrazide, sebacoyl bisphenylhydrazide, N,N'-bis(salicyloyl)oxalyl dihydrazide, N,N'-bis(salicyloyl)thiopropionyl dihydrazide, and mixtures thereof.

[0072] Peroxide scavengers include, for example, esters of β-thiodipropionic acid, mercaptobenzimidazole, zinc salts of 2-mercaptobenzimidazole, zinc salts of dibutyldithiocarbamic acid, dioctadecyl disulfide, pentaerythritol tetrakis(β-dodecylmercapto)propionate, and mixtures thereof. Polyamide stabilizers include, for example, copper or divalent manganese salts of iodides or phosphorus compounds, and mixtures thereof.

[0073] Examples of hydroxyamines include N,N-dibenzylhydroxyamine, N,N-diethylhydroxyamine, N,N-dioctylhydroxyamine, N,N-dilaurylhydroxyamine, N,N-ditetradecylhydroxyamine, N,N-dihexadecylhydroxyamine, N,N-dioctadecylhydroxyamine, N-hexadecyl-N-octadecylhydroxyamine, N-heptadecyl-N-octadecylhydroxyamine, and mixtures thereof.

[0074] Examples of the neutralizing agent include calcium stearate, zinc stearate, magnesium stearate, hydrotalcite (basic magnesium aluminum hydroxycarbonate hydrate), melamine, amines, polyamides, polyurethanes, and mixtures thereof.

[0075] Examples of lubricants include aliphatic hydrocarbons such as paraffin and wax, higher fatty acids having 8 to 22 carbon atoms, metal (Al, Ca, Mg, Zn) salts of higher fatty acids having 8 to 22 carbon atoms, aliphatic alcohols having 8 to 22 carbon atoms, polyglycols, esters of higher fatty acids having 4 to 22 carbon atoms and aliphatic monohydric alcohols having 4 to 18 carbon atoms, higher aliphatic amides having 8 to 22 carbon atoms, silicone oils, and rosin derivatives.

[0076] Examples of nucleating agents include the following: sodium 2,2'-methylenebis(4,6-di-t-butylphenyl)phosphate, [2,2'-methylenebis(4,6-di-t-butylphenyl)phosphate]dihydroxyaluminum, bis[2,2'-methylenebis(4,6-di-t-butylphenyl)phosphate]hydroxyaluminum, tris[2,2'-methylenebis(4,6-di-t-butylphenyl)phosphate]aluminum, sodium Bis(4-t-butylphenyl)phosphate, metal salts of benzoic acid such as sodium benzoate, aluminum pt-butylbenzoate, 1,3:2,4-bis(O-benzylidene)sorbitol, 1,3:2,4-bis(O-methylbenzylidene)sorbitol, 1,3:2,4-bis(O-ethylbenzylidene)sorbitol, 1,3-O-3,4-dimethylbenzylidene-2,4-O-benzylidene sorbitol, 1,3-O-benzyl benzylidene-2,4-O-3,4-dimethylbenzylidene sorbitol, 1,3:2,4-bis(O-3,4-dimethylbenzylidene) sorbitol, 1,3-Op-chlorobenzylidene-2,4-O-3,4-dimethylbenzylidene sorbitol, 1,3-O-3,4-dimethylbenzylidene-2,4-Op-chlorobenzylidene sorbitol, 1,3:2,4-bis(Op-chlorobenzylidene) sorbitol and mixtures thereof.

[0077] Examples of fillers include calcium carbonate, silicates, glass fibers, asbestos, talc, kaolin, mica, barium sulfate, carbon black, carbon fibers, zeolites, and mixtures thereof.

[0078] Among these additives, those preferably used are phenol-based antioxidants, phosphorus-based antioxidants, ultraviolet absorbers, hindered amine-based light stabilizers, peroxide scavengers and neutralizing agents. Particularly preferred phenolic antioxidants include the following compounds: Octyl-3- (3,5-di-t-butyl-4-hydroxyphenyl)propionate, pentaerythritol tetrakis-3- (3,5-di-t-butyl-4-hydroxyphenyl)propionate, 2,2'-thiobis(6-t-butylphenol), 4,4'-thiobis(3-methyl-6-t-butylphenol), 2,2'-methylenebis(4-methyl-6-t-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-t-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-t-butyl-6-(3'-t-butyl-5'-methyl-2'-hydroxybenzyl)-4-methylphenyl acrylate, 2,4-di-t-pentyl-6-[1-(2-hydroxy-3,5-di-t-pentylphenyl)ethyl]phenyl acrylate, 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-t-butyl-4-hydroxybenzyl) Isocyanurate, tris[2-(3',5'-di-t-butyl-4'-hydroxycinnamoyloxy)ethyl]isocyanurate, diethyl-3,5-di-t-butyl-4-hydroxybenzylphosphonate, di-n-octadecyl-3,5-di-t-butyl-4-hydroxybenzylphosphonate, 3,Calcium salt of 5-di-t-butyl-4-hydroxybenzylphosphonic acid monoester, n-octadecyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, neopentanetetrayltetrakis(3,5-di-t-butyl-4-hydroxycinnamate), thiodiethylene bis(3,5-di-t-butyl-4-hydroxycinnamate), 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene, 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), 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, etc.

[0079] Particularly preferred phosphorus-based antioxidants include the following compounds: Tris(nonylphenyl)phosphite, tris(2,4-di-t-butylphenyl)phosphite, distearyl pentaerythritol diphosphite, bis(2,4-di-t-butylphenyl)pentaerythritol diphosphite, bis(2,4-di-t-butyl-6-methylphenyl)pentaerythritol diphosphite, bis(2,6-di-t-butyl-4-methylphenyl)pentaerythritol diphosphite, tetrakis(2,4-di-t-butylphenyl)-4,4'-diphenylenediphosphonite, 2,2'-methylenebis(4,6-di-t-butylphenyl) 2-ethylhexyl phosphite, 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, 2,2',2''-nitrilo[triethyl-tris(3,3',5,5'-tetra-t-butyl-1,1'-biphenyl-2,2'-diyl)phosphite, 6-[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10-tetra-t-butyldibenz[d,f][1,3,2]dioxaphosphepine, and the like.

[0080] Particularly preferred examples of the ultraviolet absorber include the following compounds: 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)benzotriazo benzotriazole, 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole, 2-(3-t-butyl-2-hydroxy-5-methylphenyl)-5-chlorobenzotriazole, 2-(3'-s-butyl-2'-hydroxy-5'-t-butylphenyl)benzotriazole, 2-(2'-hydroxy-4'-octyloxyphenyl)benzotriazole, 2-(3',5'-di-t-amyl-2'-hydroxyphenyl)benzotriazole, 2-[2'-hydroxy-3',5'-bis(α,α-dimethylbenzyl)phenyl]-2H-benzotriazole, and the like.

[0081] Particularly preferred light stabilizers include the following compounds: 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) 2,2-bis(3,5-di-t-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-butanetetracarboxylate,

[0082] Tetrakis(1,2,6,6-pentamethyl-4-piperidyl) 1,2,3,4-butanetetracarboxylate, mixed esters of 1,2,3,4-butanetetracarboxylic acid with 1,2,2,6,6-pentamethyl-4-piperidinol and 1-tridecanol, mixed esters of 1,2,3,4-butanetetracarboxylic acid with 2,2,6,6-tetramethyl-4-piperidinol and 1-tridecanol, mixed esters of 1,2,3,4-butanetetracarboxylic acid with 1,2,2,6,6-pentamethyl- Mixed esters of 4-piperidinol and 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5·5]undecane, mixed esters of 1,2,3,4-butanetetracarboxylic acid and 2,2,6,6-tetramethyl-4-piperidinol and 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5·5]undecane, dimethyl Polycondensation products 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)-1,3,5-triazine-2,4-diyl)((2,2,6,6-tetramethyl-4-piperidyl)imino)hexamethylene((2,2,6,6-tetramethyl-4-piperidyl)imino)], etc.

[0083] [Method of producing resin and resin composition] The method for producing the polyethylene resin (2) and the polypropylene resin (3) is not particularly limited, and may be, for example, a resin obtained by radical polymerization, or a resin produced by polymerization using a catalyst containing a metal of group IVb, Vb, VIb or VIII of the periodic table. Examples of catalysts containing such metals include metal complexes having one or more ligands, such as oxides, halogen compounds, alcoholates, esters, aryls, etc., coordinated by π or σ bonds. These complexes may be metal complexes as they are, or may be supported on a substrate such as magnesium chloride, titanium chloride, alumina, or silicon oxide. As the polyethylene resin (2), those produced using, for example, a Ziegler-Natta catalyst, a TNZ catalyst, a metallocene catalyst, a Phillips catalyst, etc. are preferably used.

[0084] As the polyethylene resin (2) and the polypropylene resin (3), recycled resins of the above-mentioned polyethylene resin (2) and polypropylene resin (3) are also suitable. Examples of such recycled resins include recycled polyethylene resins, recycled polypropylene resins, and recycled propylene-ethylene block copolymers. Note that recycled resins are resins that have been molded into a shape such as a film, and are often used after being processed into pellets or powder from molded products such as films.

[0085] In the case of recycled resins, for example, by adjusting the ratio of the amounts of compound (1), polyethylene-based resin (2), and polypropylene-based resin (3) to fall within a specific range, coloration during processing of the recycled resin can be suppressed and a resin composition having excellent flowability can be provided.

[0086] (Method of producing resin composition) The compound (1) represented by formula (1), the polyethylene resin (2), the polypropylene resin (3), and other resins and additives added as necessary are mixed homogeneously using any known method and device in such amounts that the ratio of the amount of the polyethylene resin (2) to the total amount of the polyethylene resin (2) and the polypropylene resin (3) is 60% by mass or more and less than 100% by mass, to produce a resin composition. For example, the composition can be produced by a production method including at least a step of mixing these components with each other by melt-kneading a mixture obtained by previously dry-mixing the components.

[0087] The resin composition thus obtained has good processing stability and can prevent discoloration of the resin composition itself during processing. Such an organic material is stable against thermal and / or oxidative deterioration during production, processing, and use, and is also considered to be inhibited from discoloration due to radicals generated during processing, resulting in a high-quality product.

[0088] The present invention also relates to an organic material comprising a polyethylene-based resin (2) and a polypropylene-based resin (3), the organic material being provided with a compound represented by formula (1): [ka] [In formula (1), R 1 , R 2 , R 4 and R 5 each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group, R 3 each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, X is a single bond, a sulfur atom or -CH(-R 6 )-group(R 6 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms; A is an alkylene group having 1 to 8 carbon atoms or *-C(=O)-R 7 -group(R7 represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents a bond on the oxygen side, one of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Adding a compound (1) represented by the formula: wherein the amount of structural units derived from ethylene relative to the amount of all structural units in the polyethylene resin (2) is 67 mol % or more; The ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60% by mass or more and less than 100% by mass. A method for stabilizing an organic material is also provided. With respect to the stabilization method of the present invention, the above statements regarding the resin composition of the present invention, and the preferred embodiments thereof, apply analogously.

[0089] In the case of dry mixing, the powder may be put in a bag and mixed by rotating it by hand, or a Henschel mixer, a sand mill, an edge runner, a Taninaka type grinder, or the like may be used. For melt kneading, a Banbury mixer, a single screw extruder, a twin screw extruder, or the like may be used, and two or more extruders may be used in combination. From the viewpoint of increasing productivity, it is preferable to use a twin screw extruder for melt kneading. The temperature during melt kneading (for example, the set temperature of the extruder) is 170°C or higher, preferably 180 to 300°C, more preferably 190 to 270°C, and even more preferably 190°C to 250°C, from the viewpoint of easily reducing coloration of the resin composition itself.

[0090] <Molded body of resin composition> The resin composition of the present invention can be molded by a known molding method to produce a molded article. Examples of molding methods include injection molding, press molding, vacuum molding, vacuum press molding, pressure molding, foam molding, and extrusion molding, and these molding methods can provide injection molded articles, press molded articles, vacuum molded articles, vacuum press molded articles, pressure molded articles, foam molded articles, and extrusion molded articles. A preferred molding method is injection molding, which can be used for a variety of molded products and is versatile. Examples of injection molding methods include general injection molding, injection foam molding, supercritical injection foam molding, ultra-high speed injection molding, injection compression molding, injection press molding, gas-assisted injection molding, sandwich molding, sandwich foam molding, and insert-outsert molding.

[0091] For example, the uses of the molded article obtained by molding the resin composition of the present invention by the above molding method are not particularly limited, and are preferably used as automobile interior and exterior parts, for example, bumpers, door trims, pillars, instrument panels, consoles, rocker panels, armrests, door panels, spare tire covers, etc., parts for home appliances such as vacuum cleaners and televisions, various housing equipment parts, various industrial parts, various building material parts, and a wide variety of films such as heavy-duty bags, shrink, general packaging, thin films, protective films (protective films), extrusion laminate films, extrusion molding films, and foam molding films. EXAMPLES

[0092] The present invention will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited thereto. In the following examples and comparative examples, "parts" means "parts by weight" unless otherwise specified.

[0093] <Ingredients> The components used in the examples and comparative examples are listed below. (thermoplastic resin) Linear low-density polyethylene resin (LLDPE) (MFR value: 2 g / 10 min, manufactured by Sumitomo Chemical Co., Ltd., copolymer of ethylene and 1-butene, amount of structural units derived from ethylene: 96 mol%, density 920 kg / m 3 ) Homopolypropylene resin (HPP) (MFR value: 18g / 10min, manufactured by Sumitomo Chemical Co., Ltd.) (Processing stabilizer) ·Compound A: 2,4,8,10-tetra-t-butyl-6-[3-(3-methyl-4-hydroxy-5-t-butylphenyl)propoxy]dibenzo[d,f][1,3,2]dioxaphosphepine (Sumilizer® GP, manufactured by Sumitomo Chemical Co., Ltd.) Compound B: 3-(3,5-di-t-butyl-4-hydroxyphenyl)stearyl propionate (IRGANOX 1076, manufactured by BASF) Compound C: Tris(2,4-di-tert-butylphenyl)phosphite (IRGAFOS 168, manufactured by BASF)

[0094] The melt flow rate (MFR) of the polyethylene resin (2) was measured by Method A at a temperature of 190°C and a load of 21.18 N in accordance with the method specified in JIS K7210-2014. The MFR of the polypropylene resin (3) was measured by Method A at a temperature of 230°C and a load of 21.18 N in accordance with the method specified in JIS K7210-2014.

[0095] The density of the polyethylene resin (2) was measured by Method A specified in JIS K7112-1980.

[0096] Example 1 99 parts of LLDPE, 1 part of HPP, 0.05 parts of calcium stearate (manufactured by Nitto Kasei Kogyo Co., Ltd.), and 0.05 parts of compound A were dry blended, and the resulting mixture was kneaded in a twin-screw extruder (BTN-32, PLABOR Co., Ltd.) having a cylinder diameter of 32 mm under conditions of a temperature of 220°C and a screw rotation speed of 80 rpm in a nitrogen atmosphere to obtain pellets.

[0097] (Examples 2 to 5, Comparative Examples 1 to 10) Pellets were obtained in the same manner as in Example 1, except that compound A, compound B or compound C in the added parts by weight shown in Table 1 was dry blended.

[0098] [Table 1]

[0099] The obtained pellets of Examples 1 to 5 and Comparative Examples 1 to 10 were used to evaluate processing stability and coloration resistance by the following methods. The obtained results are shown in Table 1.

[0100] (Processing stability) The obtained pellets were kneaded in an air atmosphere at a temperature of 280°C and a screw rotation speed of 70 rpm using a single screw extruder (VS30-28 extruder, manufactured by Tanabe Plastics Co., Ltd.) with a cylinder diameter of 30 mm, and the melt flow rate (MFR) of the obtained pellets was measured. The MFR was measured using a melt flow index tester (model No. 120-LABOT-50, manufactured by Yasuda Seiki Seisakusho Co., Ltd.) according to the method specified in JIS K7210-2014 under conditions of a temperature of 190°C and a load of 21.18N. In a resin composition containing a thermoplastic resin mainly composed of a polyethylene resin, crosslinking proceeds due to heat processing, and the MFR decreases. Therefore, the higher the MFR, the better the processing stability. Based on the obtained MFR, the processing stability was evaluated according to the following criteria. Evaluation criteria for processing stability ○: MFR 1.5 or higher ×: MFR less than 1.5

[0101] (Coloring resistance) The obtained pellets were kneaded in an air atmosphere at a temperature of 280°C and a screw rotation speed of 70 rpm using a single screw extruder (VS30-28 type extruder, manufactured by Tanabe Plastics Co., Ltd.) with a cylinder diameter of 30 mm, to obtain pellets of the resin composition after kneading. The yellow index (YI) value of the pellets of the resin composition before and after kneading was measured using a color difference meter ("CM-3500d" manufactured by Konica Mirta Japan Co., Ltd.), and the change in YI before and after kneading was calculated. The smaller the change in YI (ΔYI), the more the coloring of the resin composition itself is suppressed, and the more excellent the coloring resistance is. Based on the obtained ΔYI, the coloring resistance was evaluated according to the following criteria. Evaluation criteria for color fastness ○: ΔYI less than 2.1 ×:ΔYI 2.1 or more

[0102] From the results shown in Table 1, it was found that the resin compositions of Examples 1 to 5 maintained good processing stability while suppressing discoloration of the resin composition itself. In contrast, in the cases of Comparative Examples 1 to 10, a sufficient discoloration suppression effect was not obtained. In particular, even when compound A was used, when the amount of polypropylene resin was outside the range specified in the present application, a sufficient discoloration suppression effect was not obtained. Furthermore, when compound B or compound C, which is not a compound represented by formula (1), was used, a sufficient discoloration suppression effect was not obtained. [Industrial Applicability]

[0103] The present invention provides a resin composition having excellent processing stability and improved resistance to discoloration.

Claims

1. Formula (1): 【Chemistry 1】 [In formula (1), R １ , R ２ , R ４ and R ５ each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group; R ３ each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, X is a single bond, a sulfur atom, or -CH(-R ６ )-group (R ６ represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms; A is an alkylene group having 1 to 8 carbon atoms or *-C(=O)-R ７ - group (R ７ represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents a bond on the oxygen side, Either Y or Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. A compound (1) represented by the formula: A polyethylene resin (2); A polypropylene-based resin (3), the amount of structural units derived from ethylene relative to the amount of all structural units in the polyethylene resin (2) is 67 mol% or more; The ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60% by mass or more and less than 100% by mass. Resin composition.

2. The resin composition according to claim 1, wherein the amount of the compound (1) is 0.01 to 3 mass% based on the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3).

3. 2. The resin composition according to claim 1, wherein the amount of structural units derived from propylene relative to the amount of all structural units in the polypropylene-based resin (3) is 60 mol % or more.

4. 2. The resin composition according to claim 1, wherein the amount of structural units derived from ethylene relative to the amount of all structural units in the polyethylene resin (2) is 80 mol % or more.

5. The resin composition according to claim 1, wherein the total amount of the compound (1), the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60 mass% or more based on the total amount of the resin composition.

6. 2. The resin composition according to claim 1, wherein the ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60% by mass or more and 99.9% by mass or less.

7. 2. The resin composition according to claim 1, wherein the ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 80% by mass or more and 99.9% by mass or less.

8. 2. The resin composition according to claim 1, wherein the ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 80% by mass or more and 99.5% by mass or less.

9. 2. The resin composition according to claim 1, wherein the amount of constituent units derived from diene monomers relative to the amount of all constituent units in the polyethylene-based resin (2) and / or the polypropylene-based resin (3) is 3 mol % or less.

10. The density of the polyethylene resin (2) is 875 kg / m ３ More than 980kg / m ３ The resin composition according to claim 1, wherein:

11. The resin composition according to any one of claims 1 to 10, wherein the polyethylene-based resin (2) is a high-density polyethylene, a low-density polyethylene or a linear low-density polyethylene.

12. An organic material containing a polyethylene-based resin (2) and a polypropylene-based resin (3) is added to a compound represented by the formula (1): 【Chemistry 2】 [In formula (1), R １ , R ２ , R ４ and R ５ each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group; R ３ each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, X is a single bond, a sulfur atom, or -CH(-R ６ )-group (R ６ represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms; A is an alkylene group having 1 to 8 carbon atoms or *-C(=O)-R ７ - group (R ７ represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents a bond on the oxygen side, Either Y or Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Adding a compound (1) represented by the formula: the amount of structural units derived from ethylene relative to the amount of all structural units in the polyethylene resin (2) is 67 mol% or more, The ratio of the amount of the polyethylene-based resin (2) to the total amount of the polyethylene-based resin (2) and the polypropylene-based resin (3) is 60% by mass or more and less than 100% by mass. Methods for stabilizing organic materials.

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