JP2020180303A - Polyolefin-based resin composition and molding using the same - Google Patents

Abstract

To provide a polyolefin-based resin composition which is hardly affected by NOx gas and a molding using the same.SOLUTION: A polyolefin-based resin composition contains (A) a polyolefin-based resin, (B) a hindered amine compound having a nitrogen content of less than 4.0 mass% and a molecular weight of 500 or less, (C) a phenolic antioxidant, and (E) an ultraviolet absorber (excluding benzoate compound), in which the component (B) is represented by the following formula (1) (in formula (1), R1 represents a methyl group and R2 represents an alkyl group having a straight chain or a branch and 1 to 22 carbon atoms), a content of the component (B) to 100 pts.mass of the component (A) is 0.001-5 pts.mass, a content of the component (C) to 100 pts.mass of the component (A) is 0.001-5 pts.mass, and a content of the component (E) to 100 pts.mass of the component (A) is 0.15-5 pts.mass.SELECTED DRAWING: None

Description

The present invention relates to a polyolefin-based resin composition (hereinafter, also simply referred to as “resin composition”) and a molded product using the same, and more specifically, a polyolefin-based resin composition that is not easily affected by NOx gas and a polyolefin-based resin composition using the same. Regarding molded products.

It is known that a polyolefin resin is deteriorated by an autoxidation reaction proceeding from an alkyl radical generated by the influence of light, heat, etc., and contains a resin additive such as an antioxidant or a light stabilizer. It is being stabilized. As the antioxidant added to the polyolefin resin, for example, a phenol compound, a phosphorus compound, a sulfur compound, a hydroxyamine compound and the like are known.

Antioxidants have a high effect of stabilizing polyolefin resins against heat, and in particular, phenol compounds are widely used because many of them are relatively inexpensive products. As the light stabilizer, a hindered amine compound and an ultraviolet absorber are known. In particular, the hindered amine compound is an additive having a high effect of stabilizing the polyolefin resin from the harmful effects of light and oxygen, and it is known that a combination of the hindered amine compound and the benzoate compound can obtain even more excellent weather resistance. ing. For example, in Patent Documents 1 to 8, it is shown that excellent weather resistance is imparted to automobile materials, textile materials, agricultural films and the like.

Patent No. 4462867 Patent No. 4530327 Japanese Unexamined Patent Publication No. 2006-342257 JP-A-2009-144108 Japanese Unexamined Patent Publication No. 10-195258 Japanese Unexamined Patent Publication No. 2001-302852 Japanese Unexamined Patent Publication No. 2000-159940 Japanese Unexamined Patent Publication No. 2011-236369

However, it has been pointed out that the polyolefin-based resin composition containing an antioxidant of a phenol compound has a problem that discoloration due to NOx gas becomes remarkable. Under these circumstances, in Patent Document 8, by blending a hindered amine-based light stabilizer of bis (1-undecaneoxy-2,2,6,6-tetramethylpiperidine-4-yl) carbonate, discoloration due to NOx gas is performed. Although it is disclosed that it can be suppressed, the effect is still insufficient and further improvement is required.

Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a polyolefin-based resin composition that is not easily affected by NOx gas and a molded product using the same.

As a result of diligent studies to solve the above problems, the present inventors have found that the above problems can be solved by using a specific hindered amine compound, and have completed the present invention.

（式（１）中、Ｒ^１は、メチル基を表し、Ｒ^２は、直鎖または分岐を有する炭素原子数１〜２２のアルキル基を表す。）で表され、
前記（Ａ）ポリオレフィン系樹脂１００質量部に対する前記（Ｂ）窒素含有率が４．０質量％未満であり、かつ、分子量が５００以下であるヒンダードアミン化合物の含有量が０．００１〜５質量部であり、
前記（Ａ）ポリオレフィン系樹脂１００質量部に対する前記（Ｃ）フェノール系酸化防止剤の含有量が０．００１〜５質量部であり、
前記（Ａ）ポリオレフィン系樹脂１００質量部に対する前記（Ｅ）紫外線吸収剤の含有量が０．１５〜５質量部であることを特徴とするものである。ここで、分子量とは、分子中に含まれる原子の原子量の総和、または、混合物の原子量の総和の平均値をいう。 That is, the polyolefin-based resin composition of the present invention comprises (A) a polyolefin-based resin.
(B) A hindered amine compound having a nitrogen content of less than 4.0% by mass and a molecular weight of 500 or less.
(C) Phenolic antioxidant and
(E) UV absorbers (excluding benzoate compounds),
Contains,
The hindered amine compound (B) having a nitrogen content of less than 4.0% by mass and a molecular weight of 500 or less is represented by the following formula (1).

(In the formula (1), R ¹ represents a methyl group, and R ² represents a linear or branched alkyl group having 1 to 22 carbon atoms.)
The content of the hindered amine compound having a nitrogen content of less than 4.0% by mass and a molecular weight of 500 or less with respect to 100 parts by mass of the polyolefin resin (A) is 0.001 to 5 parts by mass. Yes,
The content of the (C) phenolic antioxidant is 0.001 to 5 parts by mass with respect to 100 parts by mass of the (A) polyolefin resin.
The content of the (E) ultraviolet absorber with respect to 100 parts by mass of the (A) polyolefin resin is 0.15 to 5 parts by mass. Here, the molecular weight means the total atomic weight of the atoms contained in the molecule or the average value of the total atomic weights of the mixture.

（式（２）中、Ｒ^３は、直鎖または分岐を有する炭素原子数８〜２０のアルキル基、または下記式（３）、

（式（３）中、＊は、式（２）中のＲ^３と結合する酸素原子と連結するベンゼン環の位置を表す。）で表される基を表す。）で表され、
前記（Ａ）ポリオレフィン系樹脂１００質量部に対する前記（Ｄ）ベンゾエート化合物の含有量が０．００１〜５質量部であることが好ましい。また、本発明の樹脂組成物においては、前記（Ｅ）紫外線吸収剤が、ベンゾトリアゾール系紫外線吸収剤であることが好ましい。さらに、本発明の樹脂組成物においては、前記（Ａ）ポリオレフィン系樹脂が、エラストマーを含有することが好ましい。 In the polyolefin-based resin composition of the present invention, the (D) benzoate compound is further contained.
The benzoate compound (D) has the following formula (2),

(In the formula (2), R ³ is an alkyl group having a linear or branched carbon atom number of 8 to 20 or the following formula (3).

(In the formula (3), * represents the position of the benzene ring connected to the oxygen atom bonded to R ³ in the formula (2)). ),
The content of the (D) benzoate compound with respect to 100 parts by mass of the (A) polyolefin resin is preferably 0.001 to 5 parts by mass. Further, in the resin composition of the present invention, it is preferable that the (E) ultraviolet absorber is a benzotriazole-based ultraviolet absorber. Further, in the resin composition of the present invention, it is preferable that the polyolefin-based resin (A) contains an elastomer.

The molded product of the present invention is characterized by using the polyolefin-based resin composition of the present invention.

According to the present invention, it is possible to provide a polyolefin-based resin composition that is not easily affected by NOx gas and a molded product using the same.

Hereinafter, the polyolefin-based resin composition of the present invention will be described in detail.
The polyolefin-based resin composition of the present invention has a (B) nitrogen content of less than 4.0% by mass with respect to 100 parts by mass of the (A) polyolefin-based resin (hereinafter, also referred to as "(A) component"). In addition, 0.001 to 5 parts by mass of a hindered amine compound (hereinafter, also referred to as "(B) component") having a molecular weight of 500 or less, and (C) a phenolic antioxidant (hereinafter, also referred to as "(C) component"). (Referred to as) contains 0.001 to 5 parts by mass. As described above, by using the component (B) as the hindered amine compound, a polyolefin-based resin composition that is not easily affected by NOx gas can be obtained. Further, the resin composition of the present invention includes a benzoate compound represented by the above formula (2) (hereinafter, also referred to as “(D) component”) and (E) an ultraviolet absorber (hereinafter, “(E) component”). Also referred to as) may be contained.

<Ingredient (A)>
Examples of the component (A) according to the resin composition of the present invention include low-density polyethylene (LDPE), linear low-density polyethylene (L-LDPE), high-density polyethylene (HDPE), isotactic polypropylene, and syndiotac. Α-such as tick polypropylene, hemiisotactic polypropylene, cycloolefin polymer, stereoblock polypropylene, poly-3-methyl-1-butene, poly-3-methyl-1-pentene, poly-4-methyl-1-pentene, etc. Olefin polymer, ethylene / propylene block or random copolymer, impact copolymer polypropylene, ethylene-methyl methacrylate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, Examples thereof include ethylene-vinyl acetate copolymers, ethylene-1-octene copolymers, α-olefin copolymers such as ethylene-vinyl alcohol resin (EVOH), and the component (A) may be an elastomer. Good. In the resin composition of the present invention, two or more of these may be blended and used, a block copolymer may be formed and used as a block polymer type, or the resin may be alloyed. .. Further, it may be a chlorinated product of these polyolefin-based resins.

Examples of the above-mentioned elastomer include an elastomer obtained by blending a polyolefin such as polypropylene and polyethylene as a hard segment and a rubber such as ethylene-propylene rubber as a soft segment, or an elastomer obtained by dynamic crosslinking. .. Examples of the hard segment include at least one selected from polypropylene homopolymers, polypropylene block copolymers, polypropylene random copolymers, and the like. Examples of the soft segment include ethylene-propylene copolymer (EPM), ethylene-propylene-diene copolymer (EPDM), ethylene-vinyl acetate copolymer (EVA), vinyl acetate homopolymer and the like. Two or more of these may be blended and used. It is preferable that the resin composition of the present invention contains an elastomer as the component (A) because the effect of the present invention becomes remarkable.

The method for producing the polyolefin-based resin (A) includes a Ziegler catalyst, a Ziegler-Natta catalyst, a metallocene catalyst and other various polymerization catalysts as an auxiliary catalyst, a carrier of the catalyst, and a chain transfer agent, and also includes gas phase polymerization and solution polymerization. In various polymerization methods such as emulsification polymerization and massive polymerization, those capable of obtaining a resin having physical properties suitable for packaging materials such as various polymerization conditions such as temperature, pressure, concentration, flow velocity and removal of catalyst residue, and suitable for molding processing of packaging materials. It is produced by appropriately selecting a resin having the same physical properties. Number average molecular weight, weight average molecular weight, molecular weight distribution, melt flow rate, melting point, melting peak temperature, stereoregularity of isotactics, syndiotactics, etc., presence / absence and degree of branching, specific gravity, to various solvents The ratio of dissolved components, Haze, gloss, impact strength, bending elasticity, Orzen rigidity, other characteristics, and whether or not each characteristic value satisfies a specific formula can be appropriately selected according to the desired characteristics. ..

<Ingredient (B)>
The component (B) according to the resin composition of the present invention has a nitrogen content of less than 4.0% by mass. Here, the nitrogen content of the component (B) means the mass ratio of nitrogen to the molecular weight of the hindered amine compound. In the resin composition of the present invention, the nitrogen content of the component (B) is less than 4.0% by mass, preferably 1.0 or more and less than 4.0% by mass, and more preferably 1.5 to 1% by mass. It is in the range of 3.5% by mass. This is because if the nitrogen content is 4.0% by mass or more, the effect of the present invention may not be obtained.

The component (B) according to the resin composition of the present invention has a molecular weight of 500 or less, preferably in the range of 200 to 500, and more preferably in the range of 290 to 490. This is because when the molecular weight is 500 or more, the dispersibility in the resin composition is deteriorated and the stabilizing effect may be deteriorated.

ここで、式（１）におけるＲ^１は水素原子またはメチル基を表す。また、Ｒ^２は炭素原子数１〜２２のアルキル基を表し、例えば、メチル、エチル、プロピル、イソプロピル、ブチル、ｓｅｃ−ブチル、ｔｅｒｔ−ブチル、イソブチル、アミル、イソアミル、ｔｅｒｔ−アミル、ヘキシル、２−ヘキシル、３−ヘキシル、ヘプチル、２−ヘプチル、３−ヘプチル、イソヘプチル、ｔｅｒｔ−ヘプチル、ｎ−オクチル、イソオクチル、ｔｅｒｔ−オクチル、２−エチルヘキシル、ノニル、イソノニル、デシル、ウンデシル、ドデシル、トリデシル、テトラデシル、ペンタデシル、ヘキサデシル、ヘプタデシル、オクタデシル等が挙げられ、炭素原子数１２〜２２のアルキル基であるものが、優れた耐候性を付与することができるので、より好ましい。 The component (B) according to the resin composition of the present invention is preferably a compound represented by the following formula (1).

Here, R ¹ in the formula (1) represents a hydrogen atom or a methyl group. Further, R ² represents an alkyl group having 1 to 22 carbon atoms, and for example, methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, isobutyl, amyl, isoamyl, tert-amyl, hexyl, 2 -Hexyl, 3-hexyl, heptyl, 2-heptyl, 3-heptyl, isoheptyl, tert-heptyl, n-octyl, isooctyl, tert-octyl, 2-ethylhexyl, nonyl, isononyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl , Pentadecyl, hexadecyl, heptadecyl, octadecyl and the like, and those having an alkyl group having 12 to 22 carbon atoms are more preferable because they can impart excellent weather resistance.

Specific examples of the hindered amine compound represented by the formula (1) include the following compounds. However, in the resin composition of the present invention, the component (B) is not limited to the following compounds.

In the resin composition of the present invention, the component (B) is blended in an amount of 0.001 to 5 parts by mass, preferably 0.01 to 2 parts by mass, based on 100 parts by mass of the component (A). preferable. If the blending amount of the component (B) is less than 0.001 part by mass, the required stabilizing effect may not be obtained, and if it is more than 5 parts by mass, the surface of the molded product obtained by molding the polyolefin resin composition. This is because it may bleed out and spoil the appearance.

<Component (C)>
Examples of the component (C) according to the resin composition of the present invention include 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, and 2-tert. -Butyl-4,6-dimethylphenol, styrene phenol, 2,2'-methylenebis (4-ethyl-6-tert-butylphenol), 2,2'-thiobis- (6-tert-butyl-4-methylphenol) ), 2,2'-thiodiethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 2-methyl-4,6-bis (octylsulfanylmethyl) phenol, 2, 2'-isobutylidenebis (4,6-dimethylphenol), isooctyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, N, N'-hexane-1,6-diylbis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionamide, 2,2'-oxamide-bis [ethyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) ) Propionate], 2-ethylhexyl-3- (3', 5'-di-tert-butyl-4'-hydroxyphenyl) propionate, 2,2'-ethylenebis (4,6-di-tert-butylphenol), Polymers of 3,5-di-tert-butyl-4-hydroxy-benzenepropanoic acid and C13-15 alkyl esters, 2,5-di-tert-amylhydroquinone, and hindered phenol (trade name from Adecaparmalol). AO.OH.98), 2,2'-methylenebis [6- (1-methylcyclohexyl) -p-cresol], 2-tert-butyl-6- (3-tert-butyl-2-hydroxy-5-methyl) Benzyl) -4-methylphenyl acrylate, 2- [1- (2-hydroxy-3,5-di-tert-pentylphenyl) ethyl] -4,6-di-tert-pentylphenyl acrylate, 6- [3- [3-] (3-tert-Butyl-4-hydroxy-5-methyl) propoxy] -2,4,8,10-tetra-tert-butylbenz [d, f] [1,3,2] -dioxaphosphobin, Hexamethylene bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, bis [monoethyl (3,5-di-tert-butyl-4-hydroxybenzyl) phosphonate] calciu Salt, 5,7-bis (1,1-dimethylethyl) -3-hydroxy-2 (3H) -benzofuranone and o-xylene reaction product, 2,6-di-tert-butyl-4-( 4,6-bis (octylthio) -1,3,5-triazin-2-ylamino) phenol, DL-a-tocophenol (vitamin E), 2,6-bis (α-methylbenzyl) -4-methylphenol , Bis [3,3-bis- (4'-hydroxy-3'-tert-butyl-phenyl) butanoic acid] glycol ester, 2,6-di-tert-butyl-p-cresol, 2,6-diphenyl- 4-Octadecyloxyphenol, stearyl (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, distearyl (3,5-di-tert-butyl-4-hydroxybenzyl) phosphonate, tridecyl-3, 5-tert-Butyl-4-hydroxybenzylthioacetate, thiodiethylenebis [(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 4,4'-thiobis (6-tert-butyl-m) -Cresol), 2-octylthio-4,6-di (3,5-di-tert-butyl-4-hydroxyphenoxy) -s-triazine, 2,2'-methylenebis (4-methyl-6-tert-butylphenol) ), Bis [3,3-bis (4-hydroxy-3-tert-butylphenyl) butyric acid] glycol ester, 4,4'-butylidenebis (2,6-di-tert-butylphenol), 4,4' -Butylidenebis (6-tert-butyl-3-methylphenol), 2,2'-ethylidenebis (4,6-di-tert-butylphenol), 1,1,3-tris (2-methyl-4-hydroxy-) 5-tert-butylphenyl) butane, bis [2-tert-butyl-4-methyl-6- (2-hydroxy-3-tert-butyl-5-methylbenzyl) phenyl] terephthalate, 1,3,5-tris (2,6-Dimethyl-3-hydroxy-4-tert-butylbenzyl) isocyanurate, 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1,3 , 5-Tris (3,5-di-tert-butyl-4-hydroxybenzyl) -2,4,6-trimethylbenzene, 1,3,5-Tris [(3,5-di-tert-butyl-4) − Hydroki Siphenyl) propionyloxyethyl] isocyanurate, tetrakis [methylene-3- (3', 5'-tert-butyl-4'-hydroxyphenyl) propionate] methane, 2-tert-butyl-4-methyl-6- (2) -Acryloyloxy-3-tert-butyl-5-methylbenzyl) phenol, 3,9-bis [2- (3-tert-butyl-4-hydroxy-5-methylhydrocinnamoyloxy) -1,1-dimethyl Ethyl] -2,4,8,10-tetraoxaspiro [5.5] undecane, triethylene glycolbis [β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate], stearyl-3 -(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid amide, palmityl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid amide, myristyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) 3- (3,5) such as 3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid amide, lauryl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid amide, etc. -Dialkyl-4-hydroxyphenyl) propionic acid derivatives and the like can be mentioned. In the resin composition of the present invention, tetrakis [methylene-3- (3', 5'-tert-butyl-4'-hydroxyphenyl) propionate] methane is inexpensive and has an excellent stabilizing effect on the polyolefin resin. preferable.

In the resin composition of the present invention, the blending amount of the component (C) is 0.001 to 5 parts by mass, preferably 0.01 to 1.0 parts by mass with respect to 100 parts by mass of the component (A). .. By setting the amount of the component (C) in the above range, the effect as an antioxidant can be satisfactorily obtained.

ここで、式（２）中、Ｒ^３は、直鎖または分岐を有する炭素原子数８〜２０のアルキル基、または、下記式（３）で表される基を表す。 <Ingredient (D)>
The resin composition of the present invention preferably further contains a benzoate compound represented by the following formula (2) as the component (D).

Here, in the formula (2), R ³ represents an alkyl group having a linear or branched carbon atom number of 8 to 20 or a group represented by the following formula (3).

ここで、式（３）中、＊は、式（２）中のＲ^３と結合する酸素原子と連結するベンゼン環の位置を表す。

Here, in the formula (3), * represents the position of the benzene ring connected to the oxygen atom bonded to R ³ in the formula (2).

In benzoate compound represented by the formula (2), the alkyl group having 8 to 20 carbon atoms represented by R ^3, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, behenyl, etc. Can be mentioned.

Specific examples of the benzoate compound represented by the formula (2) include the following compounds. However, the resin composition of the present invention is not limited by these compounds.

In the resin composition of the present invention, the ratio of the component (B) to the component (D) is preferably in the range of (B) component: (D) component = 1: 4 to 4: 1 in terms of mass ratio, 3: 1. The range of ~ 1: 2 is more preferable. When the component (D) is blended in the resin composition of the present invention, 0.001 to 5 parts by mass is preferable with respect to 100 parts by mass of the component (A).

<Ingredient (E)>
The resin composition of the present invention preferably contains an ultraviolet absorber as the component (E). Examples of the component (E) include 2-hydroxybenzophenones such as 2,4-dihydroxybenzophenone and 5,5'-methylenebis (2-hydroxy-4-methoxybenzophenone); 2- (2-hydroxy-5-methyl). Phenyl) benzotriazole, 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole, 2- (2-hydroxy-3,5-di-tert-butylphenyl) -5-chlorobenzotriazole, 2-( 2-Hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy-3,5-dicumylphenyl) benzotriazole, 2,2'-methylenebis (4-tert) -Octyl-6-benzotriazolylphenol), 2- (2-hydroxy-3-tert-butyl-5-carboxyphenyl) benzotriazole polyethylene glycol ester, 2- [2-hydroxy-3- (2-acryloyl) Oxyethyl) -5-methylphenyl] benzotriazole, 2- [2-hydroxy-3- (2-methacryloyloxyethyl) -5-tert-butylphenyl] benzotriazole, 2- [2-hydroxy-3- (2) -Methacloyloxyethyl) -5-tert-octylphenyl] benzotriazole, 2- [2-hydroxy-3- (2-methacryloyloxyethyl) -5-tert-butylphenyl] -5-chlorobenzotriazole, 2- [ 2-Hydroxy-5- (2-methacryloyloxyethyl) phenyl] benzotriazole, 2- [2-hydroxy-3-tert-butyl-5- (2-methacryloyloxyethyl) phenyl] benzotriazole, 2- [2- [2- Hydroxy-3-tert-amyl-5- (2-methacryloyloxyethyl) phenyl] benzotriazole, 2- [2-hydroxy-3-tert-butyl-5- (3-methacryloyloxypropyl) phenyl] -5-chloro Bentriazole, 2- [2-hydroxy-4- (2-methacryloyloxymethyl) phenyl] benzotriazole, 2- [2-hydroxy-4- (3-methacryloyloxy-2-hydroxypropyl) phenyl] benzotriazole, 2 -[2-Hydroxy-4- (3-methacryloyloxypropyl) phenyl] 2- (2-hydroxyphenyl) benzotriazoles such as benzotriazole; Enylsalicylate, resorcinol monobenzoate, 2,4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate, octyl (3,5-di-tert-butyl-4-hydroxy) benzoate , Dodecyl (3,5-di-tert-butyl-4-hydroxy) benzoate, tetradecyl (3,5-di-tert-butyl-4-hydroxy) benzoate, hexadecyl (3,5-di-tert-butyl-4) Benoates such as −hydroxy) benzoate, octadecyl (3,5-di-tert-butyl-4-hydroxy) benzoate, behenyl (3,5-di-tert-butyl-4-hydroxy) benzoate; 2-ethyl-2 Substituted oxanilides such as'-ethoxyoxanilide, 2-ethoxy-4'-dodecyloxanilide; ethyl-α-cyano-β, β-diphenylacrylate, methyl-2-cyano-3-methyl-3- ( Cyanoacrylates such as p-methoxyphenyl) acrylate; various metal salts or metal chelate, particularly nickel, chromium salts, chelates and the like. Among these, a benzotriazole-based ultraviolet absorber is particularly preferable.

When the component (E) is blended in the resin composition of the present invention, the blending amount is preferably 0.001 to 5 parts by mass, and 0.01 to 0.5 parts by mass with respect to 100 parts by mass of the component (A). Is more preferable.

<Other ingredients>
The resin composition of the present invention is an optionally known resin other than the essential components (A), (B) and (C) and (D) and (E) as long as the effects of the present invention are not significantly impaired. Additives, for example, phosphorus-based antioxidants, thioether-based antioxidants, other antioxidants, hindered amine compounds other than the compound represented by the formula (1), nucleating agents, flame retardants, flame retardants, lubricants. , Fillers, hydrotalcites, antistatic agents, pigments, dyes and the like may be contained.

Examples of phosphorus-based antioxidants include triphenylphosphite, diisooctylphosphite, heptakis (dipropylene glycol) triphosphite, triisodecylphosphite, diphenylisooctylphosphite, diisooctylphenylphosphite, and diphenyl. Tridecylphosphite, triisooctylphosphite, trilaurylphosphite, diphenylphosphite, tris (dipropylene glycol) phosphite, diisodecylpentaerythritol diphosphite, dioleylhydrogenphosphite, trilauryltrithiophosphite, bis (Tridecyl) phosphite, tris (isodecyl) phosphite, tris (tridecyl) phosphite, diphenyldecylphosphite, dinonylphenylbis (nonylphenyl) phosphite, poly (dipropylene glycol) phenylphosphite, tetraphenyldipropylene Glycoldiphosphite, trisnonylphenylphosphite, tris (2,4-di-tert-butylphenyl) phosphite, tris (2,4-di-tert-butyl-5-methylphenyl) phosphite, tris [2] -Tert-Butyl-4- (3-tert-butyl-4-hydroxy-5-methylphenylthio) -5-methylphenyl] phosphite, tri (decyl) phosphite, octyldiphenylphosphite, di (decyl) mono Phenylphosphite, distearyl pentaerythritol diphosphite, mixture of distearyl pentaerythritol and calcium stearate, alkyl (C10) bisphenol A phosphite, di (tridecyl) pentaerythritol diphosphite, di (nonylphenyl) pentaerythritol Diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol Diphosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, bis (2, 4,6-Tri-tert-butylphenyl) pentaerythritol diphosphite, bis (2,4-dicumylphenyl) pentaerythritol diphosphite, tetraphenyl-tetra (tridecyl) pentaerythritol tetraphosphite, bis (2, 4-Di-tert-butyl-6-methylphenyl) ethylphosphite, tetra (tridecyl) isopropyridene dipheno Ludiphosphite, tetra (tridecyl) -4,4'-n-butylidenebis (2-tert-butyl-5-methylphenol) diphosphite, hexa (tridecyl) -1,1,3-tris (2-methyl-4- Hydroxy-5-tert-butylphenyl) butanetriphosphite, tetrakis (2,4-di-tert-butylphenyl) biphenylenediphosphonite, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10 -Oxide, (1-methyl-1-propenyl-3-ylidene) tris (1,1-dimethylethyl) -5-methyl-4,1-phenylene) hexatridecylphosphite, 2,2'-methylenebis (4) , 6-Di-tert-butylphenyl) -2-ethylhexyl phosphite, 2,2'-methylenebis (4,6-di-tert-butylphenyl) -octadecylphosphite, 2,2'-ethylidenebis (4, 6-Di-tert-butylphenyl) fluorophosphite, 4,4'-butylidenebis (3-methyl-6-tert-butylphenylditridecyl) phosphite, tris (2-[(2,4,8,10-) Tetrakiss-tert-butyldibenzo [d, f] [1,3,2] dioxaphosfepin-6-yl) oxy] ethyl) amine, 3,9-bis (4-nonylphenoxy) -2,4 8,10-Tetraoxa-3,9-diphosphespiro [5,5] undecane, 2,4,6-tri-tert-butylphenyl-2-butyl-2-ethyl-1,3-propanediol phosphite , Poly 4,4'-isopropyridene diphenol C12-15 alcohol phosphite and the like.

When the phosphorus-based antioxidant is blended, the blending amount is preferably 0.001 to 20 parts by mass, more preferably 0.01 to 5 parts by mass with respect to 100 parts by mass of the component (A).

Examples of the thioether-based antioxidant include 3,3'-thiodipropionic acid, alkyl (C12-14) thiopropionic acid, di (lauryl) -3,3'-thiodipropionate, and di (tridecyl)-. 3,3'-thiodipropionate, di (myristyl) -3,3'-thiodipropionate, di (stearyl) -3,3'-thiodipropionate, di (octadecyl) -3,3'- Thiodipropionate, laurylstearylthiodipropionate, tetrakis [methylene-3- (dodecylthio) propionate] methane, thiobis (2-tert-butyl-5-methyl-4,1-phenylene) bis (3- (dodecylthio)) Propionate), 2,2'-thiodiethylenebis (3-aminobutenoate), 4,6-bis (octylthiomethyl) -o-cresol, 2,2'-thiodiethylenebis [3- (3,5) -Di-tert-butyl-4-hydroxyphenyl) propionate], 2,2'-thiobis (4-methyl-6-tert-butylphenol), 2,2'-thiobis (6-tert-butyl-p-cresol) , 2-Ethylhexyl- (3,5-di-tert-butyl-4-hydroxybenzyl) thioacetate, 4,4'-thiobis (6-tert-butyl-3-methylphenol), 4,4'-thiobis ( 4-Methyl-6-tert-butylphenol), 4,4'-[thiobis (methylene)] bis (2-tert-butyl-6-methyl-1-hydroxybenzyl), bis (4,6-di-tert- Butylphenol-2-yl) sulfide, tridecyl-3,5-di-tert-butyl-4-hydroxybenzylthioacetate, 1,4-bis (octylthiomethyl) -6-methylphenol, 2,4-bis (dodecyl) Examples thereof include thiomethyl) -6-methylphenol, distearyl-disulfide, and bis (methyl-4- [3-n-alkyl (C12 / C14) thiopropionyloxy] 5-tert-butylphenyl) sulfide.

When the thioether-based antioxidant is blended, the blending amount is preferably 0.001 to 20 parts by mass, more preferably 0.01 to 5 parts by mass with respect to 100 parts by mass of the component (A).

Other antioxidants include N-benzyl-α-phenylnitrone, N-ethyl-α-methylnitrone, N-octyl-α-heptyl nitrone, N-lauryl-α-undecyl nitrone, N-tetradecyl-α. -Tridecyl nitrone, N-hexadecyl-α-pentadecyl nitrone, N-octyl-α-heptadecyl nitrone, N-hexadecyl-α-heptadecylnitrone, N-octadecyl-α-pentadecylnitrone, N-heptadecyl-α Nitron compounds such as −heptadecylnitron, N-octadecyl-α-heptadecylnitron, 3-arylbenzofuran-2 (3H) -one, 3- (alkoxyphenyl) benzofuran-2-one, 3- (acyloxyphenyl) benzofuran -2 (3H) -one, 5,7-di-tert-butyl-3- (3,4-dimethylphenyl) -benzofuran-2 (3H) -one, 5,7-di-tert-butyl-3-3 (4-Hydroxyphenyl) -benzofuran-2 (3H) -one, 5,7-di-tert-butyl-3-{4- (2-hydroxyethoxy) phenyl} -benzofuran-2 (3H) -one, 6 -(2- (4- (5,7-di-tert-2-oxo-2,3-dihydrobenzofuran-3-yl) phenoxy) ethoxy) -6-oxohexyl-6-((6-hydroxyhexanoyl) ) Oxy) hexanoate, 5-di-tert-butyl-3-(4-((15-hydroxy-3,6,9,13-tetraoxapentadecyl) oxy) phenyl) benzofuran-2 (3H) on, etc. Examples include benzofuran compounds.

When other antioxidants are blended, the blending amount is preferably 0.001 to 20 parts by mass, more preferably 0.01 to 5 parts by mass, based on 100 parts by mass of the component (A).

Examples of the hindered amine compound other than the compound represented by the formula (1) include bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate and 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, Bis (2,2,6,6-tetramethyl-4-piperidyl) di (tridecyl) -1,2,3,4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl- 4-piperidyl) -di (tridecyl) -1,2,3,4-butanetetracarboxylate, bis (1,2,2,4,4-pentamethyl-4-piperidyl) -2-butyl-2- (3) , 5-Di-tert-butyl-4-hydroxybenzyl) malonate, 1- (2-hydroxyethyl) -2,2,6,6-tetramethyl-4-piperidinol / diethyl polycondensate succinate, 1 , 6-bis (2,2,6,6-tetramethyl-4-piperidylamino) hexane / 2,4-dichloro-6-morpholino-s-triazine polycondensate, 1,6-bis (2,2) 6,6-Tetramethyl-4-piperidylamino) hexane / 2,4-dichloro-6-tert-octylamino-s-triazine polycondensate, 1,5,8,12-tetrakis [2,4-bis (2,4-bis) N-butyl-N- (2,2,6,6-tetramethyl-4-piperidyl) amino) -s-triazine-6-yl] -1,5,8,12-tetraazadodecane, 1,5 8,12-Tetrakiss [2,4-bis (N-butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino) -s-triazine-6-yl] -1,5 , 8-12-Tetraazadodecane, 1,6,11-Tris [2,4-bis (N-butyl-N- (2,2,6,6-tetramethyl-4-piperidyl) amino) -s- Triazine-6-yl] aminoundecane, 1,6,11-tris [2,4-bis (N-butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino) -s -Triazine-6-yl] aminoundecane, bis {4- (1-octyloxy-2,2,6,6-tetramethyl) piperidyl} decandionate, bis {4- (2,2,6,6-yl) Tetramethyl-1-undecyloxy) Piperidil) Carbonate, Ciba Special Examples thereof include TINUVIN NOR 371 manufactured by Luti Chemicals.

When a hindered amine compound other than the compound represented by the formula (1) is blended, the total amount of the hindered amine compound blended with the compound represented by the formula (1) is 0. It is preferably 001 to 5 parts by mass, more preferably 0.005 to 0.5 parts by mass.

Examples of the flame retardant include triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyldiphenyl phosphate, cresyl-2,6-dixylenyl phosphate, resorcinolbis (diphenyl phosphate), (1-methylethylidene). -4,1-Phenylenetetraphenyldiphosphate, 1,3-phenylenetetrakis (2,6-dimethylphenyl) phosphate, ADEKA Co., Ltd. trade name Adecastab (registered trademark) FP-500, ADEKA Co., Ltd. trade name Adecastab ( Aromatic phosphates such as FP-600 (registered trademark) FP-600 and ADEKA Co., Ltd. trade name ADEKA STAB (registered trademark) FP-800, phosphones such as divinyl phenylphosphonate, diallyl phenylphosphonate, and phenylphosphonic acid (1-butenyl) Acid ester, phenyl diphenylphosphinate, methyl diphenylphosphinate, phosphinic acid ester such as 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide derivative, bis (2-allylphenoxy) phosphazene, dicresil Phenyl compounds such as phosphazene, melamine phosphate, melamine pyrophosphate, melamine polyphosphate, melam polyphosphate, ammonium polyphosphate, piperazine phosphate, piperazine pyrophosphate, piperazine polyphosphate, phosphorus-containing vinylbenzyl compound and phosphorus-based such as red phosphorus. Flame retardants, metal hydroxides such as magnesium hydroxide and aluminum hydroxide, brominated bisphenol A type epoxy resin, brominated phenol novolac type epoxy resin, hexabromobenzene, pentabromotoluene, ethylenebis (pentabromophenyl), ethylene Bistetrabromophthalimide, 1,2-dibromo-4- (1,2-dibromoethyl) cyclohexane, tetrabromocyclooctane, hexabromocyclododecane, bis (tribromophenoxy) ethane, brominated polyphenylene ether, brominated polystyrene and 2,4,6-tris (tribromophenoxy) -1,3,5-triazine, tribromophenylmaleimide, tribromophenyl acrylate, tribromophenyl methacrylate, tetrabromobisphenol A type dimethacrylate, pentabromobenzyl acrylate, and , Bromine-based flame retardants such as brominated styrene, and the like. These flame retardants are preferably used in combination with a drip inhibitor such as fluororesin and a flame retardant aid such as polyol and hydrotalcite.

When the flame retardant is blended, the blending amount is preferably 1 to 50 parts by mass, more preferably 10 to 30 parts by mass with respect to 100 parts by mass of the component (A).

The lubricant is added for the purpose of imparting slipperiness to the surface of the molded product and enhancing the scratch prevention effect. Examples of the lubricant include hydrocarbon-based lubricants such as low-molecular-weight wax, paraffin wax, polyethylene wax, chlorinated hydrocarbon, and fluorocarbon; natural wax-based lubricants such as carnauba wax and candeliwax; lauric acid, stearic acid, and behenic acid. Higher fatty acids such as, or fatty acid-based lubricants such as oxy fatty acids such as hydroxystearic acid; aliphatic amide compounds such as stearylamide, laurylamide, oleylamide or alkylenebis fats such as methylenebisstearylamide, ethylenebisstearylamide. Aliphatic amide lubricants such as group amide compounds; fatty acid monovalent alcohol ester compounds such as steearlic stearate, butyl stearate and distearyl phthalate; glycerin tristearate, sorbitan tristearate, pentaerythritol tetrastearate, dipentaerythritol Fatty acid polyhydric alcohol ester compounds such as hexastearate, polyglycerin polylysinolate, and hardened castor oil; monovalent fatty acids such as adipic acid and stearic acid ester of dipentaerythritol, and composite esters of polybasic organic acids and polyhydric alcohols. Fatty alcohol ester-based lubricants such as compounds; Stearic acid-based lubricants such as steearic acid, lauryl alcohol, and palmityl alcohol; Metal soaps; Montanic acid-based lubricants such as partially saponified montanic acid ester; Acrylic lubricants; Silicone oil, etc. Can be mentioned. These may be used alone or in combination of two or more.

When the lubricant is blended, the blending amount is preferably 0.01 to 2 parts by mass, more preferably 0.03 to 0.5 parts by mass with respect to 100 parts by mass of the component (A).

Examples of the filler include talc, mica, calcium carbonate, calcium oxide, calcium hydroxide, magnesium carbonate, magnesium hydroxide, magnesium oxide, magnesium sulfate, aluminum hydroxide, barium sulfate, glass powder, glass fiber, clay, and dolomite. , Mica, silica, alumina, potassium titanate whisker, wallastenite, fibrous magnesium oxysulfate, etc., and the particle size (fiber diameter, fiber length, and aspect ratio in the case of fibrous material) should be appropriately selected and used. Can be done. Further, as the filler, a surface-treated filler can be used if necessary.

When the filler is blended, the blending amount is preferably 0.01 to 80 parts by mass, more preferably 1 to 50 parts by mass with respect to 100 parts by mass of the component (A).

As the metal soap, metals such as magnesium, calcium, aluminum and zinc and salts of saturated or unsaturated fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid and oleic acid are used.

When the metal soap is blended, the blending amount is preferably 0.001 to 10 parts by mass, more preferably 0.01 to 5 parts by mass, based on 100 parts by mass of the component (A).

Hydrotalcites are complex salt compounds consisting of magnesium, aluminum, hydroxyl groups, carbonate groups and arbitrary crystalline water known as natural products and synthetic products, and magnesium or a part of aluminum is used as an alkali metal or zinc. Examples thereof include those substituted with a metal and those in which a hydroxyl group and a carbonate group are substituted with another anionic group. Specifically, for example, the metal of hydrotalcite represented by the following formula (4) is substituted with an alkali metal. Things can be mentioned.

Here, in the formula (4), X1 and X2 are the following formulas 0 ≦ X2 / X1 <10,2 ≦ X1 + X2 ≦ 20, respectively.
Represents a number satisfying the condition represented by, and p represents 0 or a positive number.

Further, as the Al-Li-based hydrotalcites, a compound represented by the following formula (5) can also be used.

Here, in the formula (5), A ^{q −} represents a q-valent anion, and p represents 0 or a positive number. Further, the carbonate anion in hydrotalcites may be partially replaced with another anion.

Hydrotalcites may be obtained by dehydrating crystalline water, and are higher fatty acids such as stearic acid, higher fatty acid metal salts such as oleic acid alkali metal salts, and organic sulfonic acid metals such as dodecylbenzene sulfonic acid alkali metal salts. It may be coated with a salt, a higher fatty acid amide, a higher fatty acid ester, a wax or the like.

The hydrotalcites may be natural products or synthetic products. Examples of the synthesis method include Japanese Patent Publication No. 46-2280, Japanese Patent Publication No. 50-30039, Japanese Patent Publication No. 51-29129, Japanese Patent Publication No. 3-36839, Japanese Patent Application Laid-Open No. 61-174270, and Japanese Patent Application Laid-Open No. 5- Examples thereof include known methods described in Japanese Patent Application Laid-Open No. 1790552. Further, hydrotalcites can be used without being limited by their crystal structure, crystal particles and the like. When hydrotalcites are blended, the blending amount is preferably 0.001 to 5 parts by mass and more preferably 0.05 to 3 parts by mass with respect to 100 parts by mass of the component (A).

Antistatic agents include, for example, cationic antistatic agents such as quaternary ammonium ion salts of fatty acids and quaternary polyamines; higher alcohol phosphate salts, higher alcohol EO adducts, polyethylene glycol fatty acid esters, anionic alkyls. Anionic antistatic agents such as sulfonates, higher alcohol sulfates, higher alcohol ethylene oxide adducts sulfates, higher alcohol ethylene oxide adduct phosphates; polyhydric alcohol fatty acid esters, polyglycol phosphates, polyoxy Nonionic antistatic agents such as ethylene alkylallyl ether; amphoteric alkyl betaines such as alkyldimethylaminoacetic acid betaine, and amphoteric antistatic agents such as imidazoline amphoteric activators. The antistatic agent may be used alone, or two or more kinds of antistatic agents may be used in combination.

When the antistatic agent is blended, the blending amount is preferably 0.01 to 20 parts by mass, and more preferably 3 to 10 parts by mass with respect to 100 parts by mass of the component (A).

As the pigment, a commercially available pigment may be used, for example, Pigment Red 1, 2, 3, 9, 10, 17, 22, 23, 31, 38, 41, 48, 49, 88, 90, 97, 112. , 119, 122, 123, 144, 149, 166, 168, 169, 170, 171, 177, 179, 180, 184, 185, 192, 200, 202, 209, 215, 216, 217, 220, 223, 224. , 226, 227, 228, 240, 254; Pigment Orange 13, 31, 34, 36, 38, 43, 46, 48, 49, 51, 52, 55, 59, 60, 61, 62, 64, 65, 71 Pigment Yellow 1,3,12,13,14,16,17,20,24,55,60,73,81,83,86,93,95,97,98,100,109,110,113,114 117, 120, 125, 126, 127, 129, 137, 138, 139, 147, 148, 150, 151, 152, 153, 154, 166, 168, 175, 180, 185; Pigment Green 7, 10, 36 Pigment Blue 15, 15: 1, 15: 2, 15: 3, 15: 4, 15: 5, 15: 6, 22, 24, 56, 60, 61, 62, 64; Pigment Violet 1, 19, 23 , 27, 29, 30, 32, 37, 40, 50 and the like.

Dyes include azo dyes, anthraquinone dyes, indigoid dyes, triarylmethane dyes, xanthene dyes, alizarin dyes, acrydin dyes, stillben dyes, thiazole dyes, naphthol dyes, quinoline dyes, nitro dyes, indamine dyes, oxazine dyes, and phthalocyanine dyes. , Dyes such as cyanine dyes, and the like, and a plurality of these may be mixed and used.

The resin composition of the present invention can be obtained by uniformly mixing and kneading the above components. The method is not particularly limited, but for example, it is dry-blended with a mixer such as a Henschel mixer or a tumbler, and the processing temperature is 100 ° C. using an extruder, a Banbury mixer, a roll, a lavender plastograph, a kneader or the like. Manufactured by kneading at ~ 260 ° C. Among these, it is preferable to manufacture the mixer by using a Henschel mixer and the processing machine by using an extruder, particularly a twin-screw extruder.

The molded product of the present invention is obtained by molding the resin composition of the present invention. The molding process of the resin composition of the present invention is not particularly limited, but is an injection molding method, an extrusion molding method, a blow molding method, a vacuum molding method, an inflation molding method, a calendar molding method, a slush molding method, and a dip molding. Although a method, a foam molding method and the like can be mentioned, it is preferable to use an injection molding method for the molded product of the present invention.

Applications of the resin composition of the present invention include, for example, resin parts for automobiles such as bumpers, dashboards, instrument panels, moldings, interior skins and packings, and resin parts for home appliances such as refrigerators, washing machines and vacuum cleaners. , Tableware, buckets, household items such as bathing items, connecting parts such as connectors, miscellaneous items such as toys, storage containers such as tanks and bottles, medical items such as medical packs, injectors, catheters, medical tubes, walls, etc. Examples include materials, flooring materials, window frames, building materials such as wallpaper, electric wire covering materials, agricultural materials such as houses and tunnels, food packaging materials such as wraps and trays, various molded products such as films and sheets, and fibers.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by the following Examples and the like.

First, Table 1 shows the nitrogen content and molecular weight of the evaluated hindered amine compounds. The molecular weight (3100-4000) of Chimassorb 944 represents the styrene-equivalent molecular weight measured by GPC in tetrahydrofuran (THF). The molecular weight of XT-855 represents the molecular weight of the main component hindered amine compound.

１）化合物１：１，２，２，６，６−ペンタメチルピペリジルステアレート
２）ＬＡ−４０：２，２，６，６−テトラメチルピペリジルステアレートと２，２，６，６−テトラメチルピペリジルミリスチレートとの混合物
３）ＬＡ−８１：株式会社ＡＤＥＫＡ製ヒンダードアミン化合物製品「アデカスタブＬＡ−８１」
４）ＬＡ−５７：株式会社ＡＤＥＫＡ製ヒンダードアミン化合物製品「アデカスタブＬＡ−５７」
５）Ｃｈｉｍａｓｓｏｒｂ ９４４：ＢＡＳＦ社製ヒンダードアミン化合物製品「Ｃｈｉｍａｓｓｏｒｂ ９４４」
６）ＴＩＮＵＶＩＮ １２３：ＢＡＳＦ社製ヒンダードアミン化合物製品「ＴＩＮＵＶＩＮ １２３」
７）ＸＴ−８５５：ＢＡＳＦ社製ヒンダードアミン化合物製品「ＴＩＮＵＶＩＮ ＸＴ−８５５」

1) Compound 1: 1,2,2,6,6-pentamethylpiperidyl stearate 2) LA-40: 2,2,6,6-tetramethylpiperidyl stearate and 2,2,6,6-tetramethyl Mixture with Piperidine Methyllate 3) LA-81: Hindered amine compound product "Adecastab LA-81" manufactured by ADEKA Co., Ltd.
4) LA-57: Hindered amine compound product "ADEKA STAB LA-57" manufactured by ADEKA CORPORATION
5) Chimassorb 944: BASF's hindered amine compound product "Chimassorb 944"
6) TINUVIN 123: BASF's hindered amine compound product "TINUVIN 123"
7) XT-855: BASF's hindered amine compound product "TINUVIN XT-855"

(A) As a polyolefin resin, as a component (B), a hindered amine compound shown in Table 1 and (C) as a phenolic antioxidant, stocks, based on 100 parts by mass of the product name "TPV Mirastomer 5030N" manufactured by Mitsui Chemicals, Inc. ADEKA Co., Ltd. product name "Adecastab AO-60", as a phosphorus-based antioxidant, ADEKA Co., Ltd. product name "Adecastab 2112", 0.05 parts by mass, (E) Benzotriazole-based ultraviolet absorber, ADEKA Co., Ltd. The product name "Adecastab LA-36" and "Hexadecyl-3,5-di-tert-butyl-4-hydroxybenzoate" as benzoate compounds were blended in the amounts shown in Tables 2 and 3, respectively, and the processing temperature was changed. Roll processing was performed under the conditions of 180 ° C., a roll rotation speed of 30 rpm, and a roll kneading time of 5 minutes to prepare a sheet having a thickness of about 0.7 mm.

Next, the obtained sheet was pressed for 5 minutes with a press machine heated to 180 ° C. to prepare a sheet having a thickness of 0.4 mm, which was used as a test piece. The following evaluation was performed using the obtained test piece.

(Discoloration test with NOx gas)
According to JIS L 0855 (staining fastness test method for nitrogen oxides), exposure was carried out in a NOx gas concentration of 666 ppm for 24 hours using a “NOx gas exposure tester” manufactured by Suga Test Instruments Co., Ltd. Next, the test piece was taken out from the "NOx gas exposure tester", and using the "multi-light source spectrophotometer" manufactured by Suga Test Instruments Co., Ltd., Y. I. And a * were measured and the test piece Y. et al. Before exposure to NOx gas. I. And the difference between a * and ΔY. I. And Δa *. These results are shown in Tables 2 and 3, respectively.

(Hou resistance test)
Using the "xenon weather meter" manufactured by Suga Test Instruments Co., Ltd., perform a weather resistance test under the irradiation conditions of black panel temperature: 89 ° C and no water spray, and use the "Fourier transform infrared spectrophotometer" manufactured by Shimadzu Corporation. The carbonyl index of the test piece was measured using. The carbonyl index is defined in log ((Io-I) / Io) using the infrared absorption spectrum analysis data of the test piece. Here, Io represents the height from the baseline near 1710 cm ^-1 to the transmittance 100 (%), and I represents the peak transmittance (%) near 1710 cm ^-1 . The higher the value of the carbonyl index, the more the deterioration is progressing. In this test, the weather resistance test was performed until the carbonyl index reached 1.5. The times when the carbonyl index reached 1.5 are shown in Tables 2 and 3, respectively.

(Heat resistance test)
Using the "high temperature incubator" manufactured by ESPEC CORPORATION, the test piece was allowed to stand in a constant temperature bath at 120 ° C., and using the "multi-light source spectrophotometer" manufactured by Suga Test Instruments Co., Ltd., Y. I. Was measured. In this test, Y. I. The test piece was exposed in a constant temperature bath at 120 ° C. until the temperature reached 20. Y. I. The time when the number reached 20 is shown in Tables 2 and 3, respectively.

From Comparative Examples 2 to 4, it was confirmed that the higher the nitrogen content, the greater the discoloration due to NOx gas. In Comparative Example 2, LA-81 was a hindered amine compound having a nitrogen content of slightly exceeding 4.0% by mass, and it was confirmed that the discoloration due to NOx gas was slightly improved, but it was not satisfactory. Further, as compared with Comparative Examples 5 and 6, even if the nitrogen content was less than 4.0% by mass, when a hindered amine compound having a molecular weight of more than 500 was blended, the discoloration due to NOx gas was aggravated.

On the other hand, it was confirmed that the resin composition of the present invention can suppress coloring by the gas discoloration test as compared with the resin compositions of Comparative Examples 2 to 6. Further, from Examples 4 and 5, NOx gas discoloration due to the hindered amine compound having a nitrogen content of more than 4.0% by mass and a molecular weight of more than 500 is suppressed by using the hindered amine compound represented by the formula (1) in combination. I was able to confirm that I could do it. Furthermore, from the results of comparison between Example 1 and Example 2, it was confirmed that the combined use of the benzoate compound improved the weather resistance and heat resistance.

Since the resin composition of the present invention can exhibit excellent weather resistance even in the presence of NOx gas, for example, applications exposed to NOx gas such as automobile materials, buildings (building materials) in which generators and work vehicles are installed, etc. Can be suitably used in.

Claims (5)

(A) Polyolefin-based resin and
(B) A hindered amine compound having a nitrogen content of less than 4.0% by mass and a molecular weight of 500 or less.
(C) Phenolic antioxidant and
(E) UV absorbers (excluding benzoate compounds),
Contains,
The hindered amine compound (B) having a nitrogen content of less than 4.0% by mass and a molecular weight of 500 or less is represented by the following formula (1).

(In the formula (1), R ¹ represents a methyl group, and R ² represents a linear or branched alkyl group having 1 to 22 carbon atoms.)
The content of the hindered amine compound having a nitrogen content of less than 4.0% by mass and a molecular weight of 500 or less with respect to 100 parts by mass of the polyolefin resin (A) is 0.001 to 5 parts by mass. Yes,
The content of the (C) phenolic antioxidant is 0.001 to 5 parts by mass with respect to 100 parts by mass of the (A) polyolefin resin.
A polyolefin-based resin composition, wherein the content of the (E) ultraviolet absorber is 0.15 to 5 parts by mass with respect to 100 parts by mass of the (A) polyolefin-based resin. In addition, it contains (D) benzoate compound and
The benzoate compound (D) has the following formula (2),

(In the formula (2), R ³ is an alkyl group having a linear or branched carbon atom number of 8 to 20 or the following formula (3).

(In the formula (3), * represents the position of the benzene ring connected to the oxygen atom bonded to R ³ in the formula (2)). ),
The polyolefin-based resin composition according to claim 1, wherein the content of the (D) benzoate compound with respect to 100 parts by mass of the (A) polyolefin-based resin is 0.001 to 5 parts by mass. The polyolefin-based resin composition according to claim 1 or 2, wherein the (E) ultraviolet absorber is a benzotriazole-based ultraviolet absorber. The polyolefin-based resin composition according to any one of claims 1 to 3, wherein the polyolefin-based resin (A) contains an elastomer. A molded product using the polyolefin-based resin composition according to any one of claims 1 to 4.