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JP5175682B2 - Propylene-based resin composition and molded product thereof - Google Patents
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JP5175682B2 - Propylene-based resin composition and molded product thereof - Google Patents

Propylene-based resin composition and molded product thereof Download PDF

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JP5175682B2
JP5175682B2 JP2008269715A JP2008269715A JP5175682B2 JP 5175682 B2 JP5175682 B2 JP 5175682B2 JP 2008269715 A JP2008269715 A JP 2008269715A JP 2008269715 A JP2008269715 A JP 2008269715A JP 5175682 B2 JP5175682 B2 JP 5175682B2
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resin composition
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真也 園部
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Japan Polypropylene Corp
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Description

本発明は、プロピレン系樹脂組成物およびその成形品に関し、特に透明性、臭気及び成形加工性に優れたプロピレン系樹脂組成物およびその成形品に関する。   The present invention relates to a propylene-based resin composition and a molded product thereof, and particularly relates to a propylene-based resin composition excellent in transparency, odor, and molding processability, and a molded product thereof.

プロピレン系重合体は、成形加工性、剛性に優れ、またリサイクル性や耐熱性にも優れていることから、各種の方法で成形加工され、ポリ塩化ビニル、ポリスチレン等の他の樹脂と同様に食品容器、キャップ、医療用器具、医療用容器、包装用フィルム、文具向けシート、衣装ケース、日用品、自動車部品、電気部品等の各種用途に幅広く使用されている。これらの用途では、プロピレン系重合体もしくはその組成物に対して、より優れた透明性と成形加工性が強く求められる。   Propylene polymers are excellent in moldability, rigidity, recyclability and heat resistance, so they are molded and processed by various methods, and like other resins such as polyvinyl chloride and polystyrene. Widely used in various applications such as containers, caps, medical instruments, medical containers, packaging films, stationery sheets, clothing cases, daily necessities, automobile parts, electrical parts, etc. In these applications, more excellent transparency and moldability are strongly demanded for the propylene polymer or the composition thereof.

プロピレン系重合体は、剛性や耐熱性、ガスバリヤー性の点ではプロピレン単独重合体が、透明性や耐衝撃性の点ではエチレン、ブテン等とプロピレンとのランダム共重合体が、耐熱性、耐衝撃性ではエチレン、ブテン等とプロピレンとのブロック共重合体が好適であり、状況に応じて適宜選択的に用いられている。
しかし、ブロック共重合体は、透明性の点において十分な性能を発揮させることが困難であり、プロピレン単独重合体は、ブロック共重合体ほどではないにしろ、透明性に劣り、耐衝撃性の点で十分な性能を発揮させることが困難であり、ランダム共重合体は、透明性には優れているものの、結晶化温度の低下に伴う成形加工性の悪化が見られる傾向がある。
Propylene polymers are propylene homopolymers in terms of rigidity, heat resistance and gas barrier properties, and random copolymers of ethylene, butene and propylene in terms of transparency and impact resistance are heat resistance, In terms of impact, a block copolymer of ethylene, butene or the like and propylene is suitable, and is appropriately and selectively used depending on the situation.
However, it is difficult for block copolymers to exhibit sufficient performance in terms of transparency, and propylene homopolymers are not as transparent as block copolymers, but have poor transparency and impact resistance. In this respect, it is difficult to exhibit sufficient performance, and the random copolymer is excellent in transparency but tends to show deterioration in molding processability with a decrease in crystallization temperature.

このため、プロピレン系重合体の改質だけではなく、プロピレン系重合体に対する透明化核剤の活用による透明性と成形加工性の改良が幅広く試みられてきた。透明化核剤としては、有機リン酸塩系核剤(例えば、特許文献1参照。)やジメチルベンジリデンソルビトール系核剤(例えば、特許文献2参照。)等が最も一般的に使用されている。   For this reason, not only the modification of the propylene-based polymer but also the improvement of transparency and molding processability by utilizing a clearing nucleating agent for the propylene-based polymer has been widely attempted. As the clearing nucleating agent, an organic phosphate nucleating agent (see, for example, Patent Document 1), a dimethylbenzylidene sorbitol-based nucleating agent (see, for example, Patent Document 2), etc. are most commonly used.

しかしながら、これらの既存の透明化核剤を使用しても、透明性の改良幅は必ずしも十分ではなく、ポリスチレン等の他の樹脂の透明性には及ばない。また、成形加工時の過熱によって、芳香族アルデヒド等の揮発成分が発生し、臭気を悪化させるという問題があった。さらに、成形加工性も一定の改良は見られるもの、その効果は十分とは言えない。このため、新たな手法により、透明性と臭気と成形加工性とを同時に改良することが強く望まれていた。
特開平5−140466号公報 特開昭53−117044号公報
However, even if these existing clearing nucleating agents are used, the range of improvement in transparency is not always sufficient, and it does not reach the transparency of other resins such as polystyrene. In addition, volatile components such as aromatic aldehydes are generated due to overheating during the molding process, resulting in a problem of worsening odor. Furthermore, although the moldability is improved to some extent, the effect is not sufficient. For this reason, it has been strongly desired to simultaneously improve transparency, odor, and moldability by a new method.
Japanese Patent Laid-Open No. 5-140466 JP-A-53-117044

本発明の目的は、上記問題点に鑑み、透明性、臭気及び成形加工性に優れたプロピレン系樹脂組成物及び該樹脂組成物から成形されてなる成形品を提供することにある。   In view of the above problems, an object of the present invention is to provide a propylene-based resin composition excellent in transparency, odor, and molding processability, and a molded product formed from the resin composition.

本発明者らは、上記課題を解決するために鋭意研究を重ねた結果、プロピレン系重合体に対し、特定の透明化核剤を用いることにより、透明性、臭気、成形加工性、耐熱性、剛性、耐衝撃性に優れたプロピレン系樹脂組成物が得られることを見出し、本発明を完成するに至った。   As a result of intensive studies to solve the above problems, the present inventors have used a specific nucleating agent for the propylene-based polymer, whereby transparency, odor, moldability, heat resistance, The inventors have found that a propylene-based resin composition excellent in rigidity and impact resistance can be obtained, and have completed the present invention.

すなわち、本発明の第1の発明によれば、プロピレン系重合体100重量部に対し、下記化学構造式(1)で示される透明化核剤(A)を0.01〜2.0重量部配合することを特徴とするプロピレン系樹脂組成物が提供される。   That is, according to the first aspect of the present invention, the clearing nucleating agent (A) represented by the following chemical structural formula (1) is 0.01 to 2.0 parts by weight with respect to 100 parts by weight of the propylene polymer. A propylene-based resin composition characterized by being blended is provided.

Figure 0005175682
Figure 0005175682

また、本発明の第の発明によれば、第1の発明のプロピレン系樹脂組成物を用いることを特徴とする成形品が提供される。
Moreover, according to 2nd invention of this invention, the molded article characterized by using the propylene-type resin composition of 1st invention is provided.

本発明のプロピレン系樹脂組成物は、プロピレン系重合体に対し、前記化学構造式(1)に示される新規な透明化核剤を配合したポリプロピレン系樹脂組成物であり、このような新規な核剤を使用することにより、従来のプロピレン系樹脂組成物では実現しえなかった優れた透明性、成形加工性、耐熱性、剛性、耐衝撃性を、臭気を悪化させることなく得ることができる。   The propylene-based resin composition of the present invention is a polypropylene-based resin composition in which a novel transparent nucleating agent represented by the chemical structural formula (1) is blended with a propylene-based polymer. By using the agent, it is possible to obtain excellent transparency, molding processability, heat resistance, rigidity, and impact resistance that could not be realized with a conventional propylene-based resin composition without deteriorating the odor.

本発明は、メタロセン触媒によって重合されたプロピレン系重合体100重量部に対し、前記化学構造式(1)で示される透明化核剤(A)を0.01〜2.0重量部配合したプロピレン系樹脂組成物、および前記プロピレン系樹脂組成物を各種手法にて成形して得られる成形品である。以下、プロピレン系樹脂組成物を構成する成分、プロピレン系樹脂組成物の製造方法、成形品について詳細に説明する。

The present invention is a propylene in which 0.01 to 2.0 parts by weight of the clearing nucleating agent (A) represented by the chemical structural formula (1) is blended with 100 parts by weight of a propylene polymer polymerized by a metallocene catalyst. And a molded product obtained by molding the propylene-based resin composition by various methods. Hereinafter, the component which comprises a propylene-type resin composition, the manufacturing method of a propylene-type resin composition, and a molded article are demonstrated in detail.

[1]プロピレン系樹脂組成物を構成する成分
(1)プロピレン系重合体
本発明のプロピレン系樹脂組成物で用いられるプロピレン系重合体は、プロピレン単独重合体であっても、プロピレン系共重合体(ランダム共重合体、ブロック共重合体)であっても、あるいはこれらの混合物であってもよい。共重合体とする場合には、エチレンもしくはプロピレン以外のα−オレフィンからなる群から選ばれる1種もしくは2種以上をコモノマーとして使用するのが一般的であるが、これに限定されるものではない。
ただし、優れた透明性を発現させるためには、プロピレン単独重合体、プロピレンランダム共重合体、もしくはコモノマー含量が10重量%以下のプロピレンブロック共重合体が好ましく、プロピレンランダム共重合体がより好ましい。
[1] Components constituting propylene resin composition (1) Propylene polymer The propylene polymer used in the propylene resin composition of the present invention may be a propylene homopolymer or a propylene copolymer. (Random copolymer, block copolymer) or a mixture thereof. In the case of a copolymer, it is common to use one or more selected from the group consisting of α-olefins other than ethylene or propylene as a comonomer, but is not limited thereto. .
However, in order to develop excellent transparency, a propylene homopolymer, a propylene random copolymer, or a propylene block copolymer having a comonomer content of 10% by weight or less is preferable, and a propylene random copolymer is more preferable.

また、本発明で用いられるプロピレン系重合体は、JIS K7210(230℃、2.16kg荷重)に準拠したメルトフローレートが0.3〜100g/10分であるものが好ましい。メルトフローレートが0.3g/10分を著しく下回ると、押出成形時の押出負荷が増大し、表面の平滑性が損なわれ、成形品の外観が悪化する恐れがあり、逆に、100g/10分を著しく上回ると、透明化核剤のプロピレン系重合体への均一分散性が悪化して透明性が発現しにくくなる恐れがある。   In addition, the propylene polymer used in the present invention preferably has a melt flow rate of 0.3 to 100 g / 10 min in accordance with JIS K7210 (230 ° C., 2.16 kg load). When the melt flow rate is significantly lower than 0.3 g / 10 min, the extrusion load at the time of extrusion molding increases, the surface smoothness may be impaired, and the appearance of the molded product may be deteriorated. Conversely, 100 g / 10 If the amount exceeds significantly, the uniform dispersibility of the clearing nucleating agent in the propylene-based polymer may be deteriorated, and transparency may be hardly exhibited.

本発明で用いられるプロピレン系重合体を得るために用いられる触媒はメタロセン触媒(例えば、特開平5−295022号公報等に記載)使用る。
メタロセン触媒を用いた場合には、透明性が良好であり、揮発分も少なく臭気が良好となることから、より好ましい。
The catalyst used to obtain the propylene polymer used in the present invention, the metallocene catalyst (for example, described in JP-A-5-295022 Patent Publication) that use.
When a metallocene catalyst is used, it is more preferable because transparency is good and volatile content is small and odor is good.

本発明で用いられるプロピレン系重合体を得るために用いられる重合プロセスは、特に限定されるものではなく、公知の重合プロセスが使用可能である。例えば、スラリー重合法、バルク重合法、気相重合法等が使用できる。また、これらの重合法の1種または2種以上を組み合わせて多段重合を行って重合することもできる。さらには、2種以上のプロピレン系重合体を機械的に溶融混練することによっても製造することができる。   The polymerization process used to obtain the propylene-based polymer used in the present invention is not particularly limited, and a known polymerization process can be used. For example, a slurry polymerization method, a bulk polymerization method, a gas phase polymerization method and the like can be used. Moreover, it can also superpose | polymerize by performing multistage polymerization combining the 1 type (s) or 2 or more types of these polymerization methods. Further, it can also be produced by mechanically melting and kneading two or more kinds of propylene polymers.

(2)透明化核剤(A)
本発明のプロピレン系樹脂組成物に用いられる透明化核剤(A)は、下記化学構造式(1)で示される透明化核剤である。
(2) Clearing nucleating agent (A)
The clearing nucleating agent (A) used in the propylene-based resin composition of the present invention is a clearing nucleating agent represented by the following chemical structural formula (1).

Figure 0005175682
Figure 0005175682

本発明に用いられる透明化核剤(A)は、得られる成形品に、従来の透明化核剤では実現が不可能なほどの非常に優れた透明性を与えることができる。また、従来の透明化核剤よりも結晶化効果が高いため、併せて成形加工性の改良を実現することができる。さらに、加熱しても芳香族アルデヒドの発生が極めて少ないため、臭気の悪化がほとんどないという特長がある。   The clearing nucleating agent (A) used in the present invention can give the resulting molded article very excellent transparency that is impossible to achieve with conventional clearing nucleating agents. In addition, since the crystallization effect is higher than that of the conventional clearing nucleating agent, it is possible to improve the molding processability. Furthermore, since there is very little generation | occurrence | production of aromatic aldehyde even if it heats, there exists the feature that there is almost no deterioration of an odor.

本発明のプロピレン系樹脂組成物に用いられる透明化核剤(A)の配合量は、プロピレン系重合体100重量部に対し、0.01〜2.0重量部であり、好ましくは0.2〜0.6重量部である。0.01重量部未満では十分な効果が得られ難い。2.0重量部を超えると核剤の凝集が発生して透明性が低下する可能性があるため望ましくない。   The blending amount of the clearing nucleating agent (A) used in the propylene-based resin composition of the present invention is 0.01 to 2.0 parts by weight, preferably 0.2 to 100 parts by weight of the propylene-based polymer. -0.6 parts by weight. If it is less than 0.01 part by weight, it is difficult to obtain a sufficient effect. If the amount exceeds 2.0 parts by weight, the nucleating agent may be aggregated and the transparency may be lowered.

本発明に用いられる透明化核剤(A)の製造方法としては、WO2005/111134号公報等に記載の方法を挙げることができる。市販品としても、容易に入手することができ、例えば、ミラッドNX8000(ミリケン・アンド・カンパニー社製)を挙げることができる。   As a manufacturing method of the clearing nucleating agent (A) used for this invention, the method as described in WO2005 / 111134 etc. can be mentioned. Commercially available products can also be easily obtained, for example, Mirad NX8000 (manufactured by Milliken & Company).

また、本発明のプロピレン系樹脂組成物においては、透明化核剤(A)以外に他の核剤の少なくとも1種類を併用してもよい。これにより透明性や剛性、成形加工性等をさらに向上させることができる。ここで用いられる核剤としては、特に限定されるものではなく、公知の核剤が使用できる。例えば、ソルビトール系透明化核剤、有機リン酸塩系透明化核剤および芳香族リン酸エステル類、タルクなど既知の透明化核剤を本発明の効果を大きく阻害しない範囲で添加することができる。   Moreover, in the propylene-type resin composition of this invention, you may use together at least 1 sort (s) of another nucleating agent other than the clearing nucleating agent (A). Thereby, transparency, rigidity, moldability, etc. can be further improved. The nucleating agent used here is not particularly limited, and known nucleating agents can be used. For example, known clearing nucleating agents such as sorbitol-based clearing nucleating agents, organic phosphate-based clearing nucleating agents, aromatic phosphate esters, and talc can be added within a range that does not significantly impair the effects of the present invention. .

(3)その他の添加剤
本発明のプロピレン系樹脂組成物においては、プロピレン系重合体および透明化核剤(A)に加えて、プロピレン系重合体の安定剤などとして使用されている各種酸化防止剤、中和剤、滑剤、紫外線吸収剤、光安定剤等の添加剤を配合することができる。
(3) Other additives In the propylene-based resin composition of the present invention, in addition to the propylene-based polymer and the clearing nucleating agent (A), various antioxidants used as a stabilizer for the propylene-based polymer. Additives such as an agent, a neutralizing agent, a lubricant, an ultraviolet absorber, and a light stabilizer can be blended.

具体的には、酸化防止剤としては、ビス(2,6−ジ−t−ブチル−4−メチルフェニル)ペンタエリスリトール−ジ−フォスファイト、ジ−ステアリル−ペンタエリスリトール−ジ−フォスファイト、ビス(2,4−ジ−t−ブチルフェニル)ペンタエリスリトール−ジ−フォスファイト、トリス(2,4−ジ−t−ブチルフェニル)フォスファイト、テトラキス(2,4−ジ−t−ブチルフェニル)−4,4’−ビフェニレン−ジ−フォスフォナイト、テトラキス(2,4−ジ−t−ブチル−5−メチルフェニル)−4,4’−ビフェニレン−ジ−フォスフォナイト等のリン系酸化防止剤、2,6−ジ−t−ブチル−p−クレゾール、テトラキス[メチレン(3,5−ジ−t−ブチル−4−ヒドロキシヒドロシンナメート)]メタン、1,3,5−トリメチル−2,4,6−トリス(3,5−ジ−t−ブチル−4−ハイドロキシベンジル)ベンゼン、トリス(3,5−ジ−t−ブチル−4−ハイドロキシベンジル)イソシアヌレート等のフェノール系酸化防止剤、ジ−ステアリル−ββ’−チオ−ジ−プロピオネート、ジ−ミリスチル−ββ’−チオ−ジ−プロピオネート、ジ−ラウリル−ββ’−チオ−ジ−プロピオネート等のチオ系酸化防止剤等が挙げられる。   Specifically, as the antioxidant, bis (2,6-di-t-butyl-4-methylphenyl) pentaerythritol-di-phosphite, di-stearyl-pentaerythritol-di-phosphite, bis ( 2,4-di-t-butylphenyl) pentaerythritol-diphosphite, tris (2,4-di-t-butylphenyl) phosphite, tetrakis (2,4-di-t-butylphenyl) -4 Phosphorous antioxidants such as 4,4'-biphenylene-diphosphonite, tetrakis (2,4-di-t-butyl-5-methylphenyl) -4,4'-biphenylene-diphosphonite, 2,6-di-t-butyl-p-cresol, tetrakis [methylene (3,5-di-t-butyl-4-hydroxyhydrocinnamate)] methane, 1 3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate Phenolic antioxidants such as di-stearyl-ββ'-thio-di-propionate, di-myristyl-ββ'-thio-di-propionate, di-lauryl-ββ'-thio-di-propionate An antioxidant etc. are mentioned.

中和剤の具体例としては、ステアリン酸カルシウム、ステアリン酸亜鉛、ステアリン酸マグネシウムなどの金属脂肪酸塩、ハイドロタルサイト(商品名:協和化学工業(株)の下記一般式(2)で表されるマグネシウムアルミニウム複合水酸化物塩)、ミズカラック(下記一般式(3)で表されるリチウムアルミニウム複合水酸化物塩)などが挙げられる。   Specific examples of the neutralizing agent include metal fatty acid salts such as calcium stearate, zinc stearate and magnesium stearate, hydrotalcite (trade name: magnesium represented by the following general formula (2) of Kyowa Chemical Industry Co., Ltd.) Aluminum complex hydroxide salt), Mizukarak (lithium aluminum composite hydroxide salt represented by the following general formula (3)), and the like.

Mg1−xAl(OH)(COx/2・mHO …(2)
[式中、xは、0<x≦0.5であり、mは3以下の数である。]
[AlLi(OH)X・mHO …(3)
[式中、Xは、無機または有機のアニオンであり、nはアニオン(X)の価数であり、mは3以下である。]
Mg 1-x Al x (OH) 2 (CO 3 ) x / 2 · mH 2 O (2)
[Wherein x is 0 <x ≦ 0.5, and m is a number of 3 or less. ]
[Al 2 Li (OH) 6 ] n X · mH 2 O (3)
[Wherein, X is an inorganic or organic anion, n is the valence of the anion (X), and m is 3 or less. ]

滑剤の具体例としては、既知の滑剤が挙げられるが、オレイン酸アミド、ステアリン酸アミド、エルカ酸アミド、ベヘニン酸アミド等の脂肪酸アミド、ステアリン酸ブチル、シリコーンオイル等が挙げられる。   Specific examples of the lubricant include known lubricants, and examples thereof include fatty acid amides such as oleic acid amide, stearic acid amide, erucic acid amide, and behenic acid amide, butyl stearate, and silicone oil.

紫外線吸収剤としては、2−ヒドロキシ−4−n−オクトキシベンゾフェノン、2−(2’−ヒドロキシ−3’,5’−ジ−t−ブチルフェニル)−5−クロロベンゾトリアゾール、2−(2’−ヒドロキシ−3’−t−ブチル−5’−メチルフェニル)−5−クロロベンゾトリアゾール等の紫外線吸収剤等が挙げられる。   Examples of the ultraviolet absorber include 2-hydroxy-4-n-octoxybenzophenone, 2- (2′-hydroxy-3 ′, 5′-di-t-butylphenyl) -5-chlorobenzotriazole, 2- (2 And ultraviolet absorbers such as' -hydroxy-3'-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole.

光安定剤としては、n−ヘキサデシル−3,5−ジ−t−ブチル−4−ヒドロキシベンゾエート、2,4−ジ−t−ブチルフェニル−3’,5’−ジ−t−ブチル−4’−ヒドロキシベンゾエート、ビス(2,2,6,6−テトラメチル−4−ピぺリジル)セバケート、コハク酸ジメチル−2−(4−ヒドロキシ−2,2,6,6−テトラメチル−1−ピペリジル)エタノール縮合物、ポリ{[6−〔(1,1,3,3−テトラメチルブチル)アミノ〕−1,3,5−トリアジン−2,4ジイル]〔(2,2,6,6−テトラメチル−4−ピペリジル)イミノ〕ヘキサメチレン〔(2,2,6,6−テトラメチル−4−ピペリジル)イミノ〕}、N,N’−ビス(3−アミノプロピル)エチレンジアミン−2,4−ビス〔N−ブチル−N−(1,2,2,6,6−ペンタメチル−4−ピペリジル)アミノ〕−6−クロロ−1,3,5−トリアジン縮合物等の光安定剤を挙げることができる。   Examples of the light stabilizer include n-hexadecyl-3,5-di-t-butyl-4-hydroxybenzoate, 2,4-di-t-butylphenyl-3 ′, 5′-di-t-butyl-4 ′. -Hydroxybenzoate, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, dimethyl-2- (4-hydroxy-2,2,6,6-tetramethyl-1-piperidyl) succinate ) Ethanol condensate, poly {[6-[(1,1,3,3-tetramethylbutyl) amino] -1,3,5-triazine-2,4diyl] [(2,2,6,6- Tetramethyl-4-piperidyl) imino] hexamethylene [(2,2,6,6-tetramethyl-4-piperidyl) imino]}, N, N′-bis (3-aminopropyl) ethylenediamine-2,4- Bis [N-butyl-N- ( , Mention may be made of a light stabilizer such as 2,2,6,6-pentamethyl-4-piperidyl) amino] -6-chloro-1,3,5-triazine condensate.

さらに、下記化学構造式(4)や下記一般式(5)で表されるアミン系酸化防止剤、5,7−ジ−t−ブチル−3−(3,4−ジ−メチル−フェニル)−3H−ベンゾフラン−2−ワン等のラクトン系酸化防止剤、下記化学構造式(6)等のビタミンE系酸化防止剤を挙げることができる。   Further, an amine-based antioxidant represented by the following chemical structural formula (4) or the following general formula (5), 5,7-di-t-butyl-3- (3,4-di-methyl-phenyl)- Examples thereof include lactone antioxidants such as 3H-benzofuran-2-one and vitamin E antioxidants such as the following chemical structural formula (6).

Figure 0005175682
Figure 0005175682

Figure 0005175682
[但し、式(5)中、RとRは、炭素数14〜22のアルキル基である。]
Figure 0005175682
[However, in Formula (5), R < 1 > and R < 2 > is a C14-C22 alkyl group. ]

Figure 0005175682
Figure 0005175682

さらに、その他に、帯電防止剤、脂肪酸金属塩等の分散剤、有機化酸化物、顔料や染料などの着色剤、高密度ポリエチレン、低密度ポリエチレン、線形低密度ポリエチレン、オレフィン系エラストマー、非オレフィン系エラストマー等を本発明の目的を損なわない範囲で配合することができる。   In addition, antistatic agents, dispersants such as fatty acid metal salts, organic oxides, colorants such as pigments and dyes, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, olefin-based elastomers, non-olefin-based materials Elastomers and the like can be blended within a range that does not impair the object of the present invention.

[2]プロピレン樹脂組成物の製造方法
本発明のプロピレン系樹脂組成物は、プロピレン系重合体、透明化核剤(A)および必要に応じて用いる他の添加剤を、ヘンシェルミキサー、スーパーミキサー、リボンブレンダー等に投入して混合した後、通常の単軸押出機、二軸押出機、バンバリーミキサー、プラベンダー、ロール等で170〜280℃の温度範囲で溶融混練することにより得ることができる。
[2] Propylene resin composition production method The propylene resin composition of the present invention comprises a propylene polymer, a clearing nucleating agent (A), and other additives used as necessary, a Henschel mixer, a super mixer, After being put into a ribbon blender or the like and mixed, it can be obtained by melting and kneading in a temperature range of 170 to 280 ° C. with a normal single screw extruder, twin screw extruder, Banbury mixer, plastic bender, roll or the like.

[3]成形品
本発明の成形品は、上記のプロピレン系樹脂組成物を、公知の射出成形機、押出成形機、フィルム成形機、ブロー成形機、繊維成形機等各種の成形機により成形することにより得られるものであり、非常に高い透明性と臭気の少なさを特徴とする。
本発明の成形品としては、射出成形品、押出成形品、真空成形品、圧縮成形品、カレンダー成形品、積層成形品、流動浸漬成形品、吹込み成形品、スラッシュ成形品、回転成形品、熱成形品、CCM成形品などがあり、具体的には、食品容器(プリン容器、ゼリー容器、ヨーグルト容器、その他のデザート容器、惣菜容器、茶碗蒸し容器、インスタントラーメン容器、米飯容器、レトルト容器、弁当容器等)、飲料容器(飲料ボトル、チルドコーヒー容器、ワンハンドカップ容器、その他の飲料容器等)、キャップ(ペットボトルキャップ、1ピースキャップ、2ピースキャップ、インスタントコーヒーのキャップ、調味料キャップ、化粧品容器キャップ等)、医薬品容器(輸液バッグ、血液バッグ、プレフィルドシリンジ、キット製剤、目薬容器、薬液容器、薬剤容器、液体の長期保存容器、プレススルーパッケージ、ストリップパッケージ、分包、プラスチックバイアル等)、その他各種容器(インク容器、化粧品容器、シャンプー容器、洗剤容器等)、医療用器具(ディスポーザブルシリンジおよびその部品、カテーテル・チューブ、真空採血管、手術用不織布、血液用フィルター、血液回路などのディスポーザブル器具、人工肺、人工肛門などの人工臓器類の部品、ダイアライザー、試験管、縫合糸、湿布基材、歯科用材料の部品、整形外科用材料の部品、コンタクトレンズのケース等)、日用品(衣装ケース、バケツ、洗面器、筆記用具、コンテナ、玩具、調理器具、その他各種ケース等)、自動車部品(インパネ、バンパー、灯体等)、電気・電子部品(各種電気機器の部材・筐体、半導体搬送容器、光学部品、各種情報メディアケース、太陽電池封止材等)、フィルム、繊維、シート、などが挙げられる。
[3] Molded Product The molded product of the present invention is obtained by molding the propylene-based resin composition with various molding machines such as a known injection molding machine, extrusion molding machine, film molding machine, blow molding machine, and fiber molding machine. And is characterized by very high transparency and low odor.
As the molded product of the present invention, an injection molded product, an extrusion molded product, a vacuum molded product, a compression molded product, a calendar molded product, a laminated molded product, a fluidized immersion molded product, a blow molded product, a slush molded product, a rotational molded product, There are thermoformed products, CCM molded products, etc., specifically, food containers (pudding containers, jelly containers, yogurt containers, other dessert containers, side dish containers, chawanmushi containers, instant noodle containers, cooked rice containers, retort containers, lunch boxes Containers), beverage containers (beverage bottles, chilled coffee containers, one-hand cup containers, other beverage containers, etc.), caps (plastic bottle caps, 1-piece caps, 2-piece caps, instant coffee caps, seasoning caps, cosmetic containers) Caps), pharmaceutical containers (infusion bags, blood bags, prefilled syringes, kit formulations, eyes) Containers, drug containers, drug containers, liquid long-term storage containers, press-through packages, strip packages, sachets, plastic vials, etc.) and other various containers (ink containers, cosmetic containers, shampoo containers, detergent containers, etc.), medical instruments (Disposable syringes and parts thereof, catheters and tubes, vacuum blood collection tubes, surgical nonwovens, blood filters, disposable devices such as blood circuits, parts of artificial organs such as artificial lungs and anus, dialyzers, test tubes, sutures , Poultice base materials, dental material parts, orthopedic material parts, contact lens cases, etc.), daily necessities (clothing cases, buckets, washbasins, writing utensils, containers, toys, cooking utensils, other cases, etc.) , Automotive parts (instruments, bumpers, lamps, etc.), electrical / electronic parts (various electrical equipment) Member-housing, semiconductor transport container, optics, various information media case, the solar cell encapsulant, etc.), films, fibers, sheets, and the like.

以下、実施例により、本発明をさらに詳細に説明するが、本発明は、これらの記載により何ら限定されるものではない。なお、各実施例及び比較例において、用いた物性測定は以下の方法で行い、プロピレン系重合体、透明化核剤及び他の添加剤(酸化防止剤、中和剤など)としては以下のものを使用した。   EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited at all by these description. In each example and comparative example, the physical properties used were measured by the following methods, and the followings were used as propylene-based polymers, clearing nucleating agents and other additives (antioxidants, neutralizing agents, etc.). It was used.

1.試験方法
(1)エチレン含量
13C−NMRにより、エチレン含有量、およびブテン−1含有量を測定した。その測定条件は以下の通りである。
機種:日本電子(株)製GSX−400
溶媒:o−ジクロルベンゼン:重ベンゼン=4:1(体積比)
濃度:100mg/ml
温度:130℃
パルス角:90°
パルス間隔:15秒
積算回数:5,000回以上
1. Test method (1) Ethylene content
The ethylene content and the butene-1 content were measured by 13 C-NMR. The measurement conditions are as follows.
Model: GSX-400 manufactured by JEOL Ltd.
Solvent: o-dichlorobenzene: heavy benzene = 4: 1 (volume ratio)
Concentration: 100 mg / ml
Temperature: 130 ° C
Pulse angle: 90 °
Pulse interval: 15 seconds Integration count: 5,000 times or more

(2)メルトフローレート(MFR)
JIS K7120:1999、230℃ 2.16kg荷重に準拠して測定した。
(2) Melt flow rate (MFR)
Measured according to JIS K7120: 1999, 230 ° C. 2.16 kg load.

(3)ヘーズ
東芝機械製EC100射出成形機により、成形温度220℃、金型温度40℃で厚さ1mmtのシート状試験片を作成し、JIS K7105:1981に準拠して測定した。この値が小さいほど透明であることを意味し、一般には高透明・高光沢な成形品としての外観意匠性が高いことになる。
(3) Haze Using a EC100 injection molding machine manufactured by Toshiba Machine, a sheet-shaped test piece having a molding temperature of 220 ° C. and a mold temperature of 40 ° C. having a thickness of 1 mmt was prepared and measured according to JIS K7105: 1981. It means that it is transparent so that this value is small, and generally the external appearance design property as a highly transparent and highly glossy molded product will be high.

(4)臭気
ペレット80gを容量300mlの清潔な共栓付三角フラスコに封入し、80℃に昇温・保持された熱風循環乾燥機内で2時間加熱した後、パネラーによる官能評価を行った。パネラーは事前テストにより選定された5名とした。臭気の判定基準は下記の6段階とし、5人の平均値で表した。
0級 無臭
1級 やっと感じられる
2級 感じられる(臭いの質が分かる)
3級 かなり臭う(楽に感じる)
4級 強く臭う
5級 激しく臭う(耐えられないほど強烈)
(4) Odor 80 g of pellets were sealed in a 300 ml clean Erlenmeyer flask with a stopper, heated for 2 hours in a hot air circulating drier heated to 80 ° C., and then subjected to sensory evaluation by a panelist. The panelists were selected from 5 people who were selected by the preliminary test. The criteria for odor were the following 6 levels, expressed as the average of 5 people.
Level 0 Odorless Level 1 Feels at last Level 2 Feels (understands odor quality)
Level 3 Smells quite a lot (feels comfortable)
Grade 4 smells strong Grade 5 smells violently (strong enough to be unbearable)

(5)芳香族アルデヒド発生量
ペレット20mgを200℃に加熱し10分間熱抽出した後、ガスクロマトグラフ(GC)注入口で冷却捕集した成分を気化させてGCカラムに導入し、GC−MS測定により発生した芳香族アルデヒドの定量を行った。
(5) Aromatic aldehyde generation amount After heating 20 mg of pellets to 200 ° C. and thermally extracting for 10 minutes, the components cooled and collected at the gas chromatograph (GC) inlet are vaporized and introduced into the GC column, and GC-MS measurement is performed. The amount of aromatic aldehyde generated was determined.

(6)成形サイクル
住友重機械工業製SG125射出成形機を用いて、成形温度240℃、金型温度15℃で肉厚0.6mmのプリンカップを成形した。30ショットを安定して成形できた場合は冷却時間を0.1秒短縮し、成形可能な最短の冷却時間を求め、成形サイクルの指標とした。この値が小さいほど、短時間で成形できることになり、成形加工性がよいことを示す。
(6) Molding cycle Using a SG125 injection molding machine manufactured by Sumitomo Heavy Industries, a pudding cup having a thickness of 0.6 mm was molded at a molding temperature of 240 ° C and a mold temperature of 15 ° C. When 30 shots could be molded stably, the cooling time was shortened by 0.1 second, and the shortest cooling time that could be molded was determined and used as an index of the molding cycle. A smaller value indicates that molding can be performed in a shorter time and molding processability is better.

2.プロピレン系重合体、透明化核剤及び他の添加剤
(1)プロピレン系重合体
(i)プロピレン単独重合体−1(HPP−1):ノバテックMA3AQ(日本ポリプロ社製)。チーグラー・ナッタ触媒、エチレン濃度0重量%、MFR12g/10分
(ii)エチレン・プロピレンランダム共重合体−1(RPP−1):ノバテックMX03ZQ(日本ポリプロ社製)。チーグラー・ナッタ触媒、エチレン濃度3.8重量%、MFR30g/10分
(iii)エチレン・プロピレンランダム共重合体−2(RPP−2):ウィンテックWSX02P(日本ポリプロ社製)。メタロセン触媒、エチレン濃度3.2重量%、MFR25g/10分
2. Propylene polymer, clearing nucleating agent and other additives (1) Propylene polymer (i) Propylene homopolymer-1 (HPP-1): Novatec MA3AQ (manufactured by Nippon Polypro). Ziegler-Natta catalyst, ethylene concentration 0% by weight, MFR 12 g / 10 min (ii) ethylene / propylene random copolymer-1 (RPP-1): Novatec MX03ZQ (manufactured by Nippon Polypro). Ziegler-Natta catalyst, ethylene concentration 3.8% by weight, MFR 30 g / 10 min (iii) ethylene / propylene random copolymer-2 (RPP-2): Wintech WSX02P (manufactured by Nippon Polypro). Metallocene catalyst, ethylene concentration 3.2 wt%, MFR 25 g / 10 min

(2)透明化核剤
(i)ミラッドNX8000(ミリケン・アンド・カンパニー社製):透明化核剤(A)相当品で、下記化学構造式(7)で表される化合物
(2) Clearing nucleating agent (i) Mirad NX8000 (manufactured by Milliken & Company): equivalent to clearing nucleating agent (A), a compound represented by the following chemical structural formula (7)

Figure 0005175682
Figure 0005175682

(ii)アデカスタブNA21((株)ADEKA社製):有機リン酸金属塩化合物系透明化核剤:透明化核剤(A)に相当しない透明化核剤
(iii)ゲルオールMD(新日本理化(株)社製):ジメチルベンジリデンソルビトール系透明化核剤:透明化核剤(A)に相当しない透明化核剤
(Ii) ADK STAB NA21 (manufactured by ADEKA Co., Ltd.): Organophosphate metal salt compound-based clearing nucleating agent: Clearing nucleating agent not corresponding to clearing nucleating agent (A) (iii) Gelol MD (New Nippon Rika ( Co., Ltd.): Dimethylbenzylidenesorbitol-based clearing nucleating agent: Clearing nucleating agent not equivalent to clearing nucleating agent (A)

(3)酸化防止剤
(i)ヒンダードフェノール系酸化防止剤:イルガノックス1010(IR1010;チバ社製);テトラキス[メチレン−3−(3’,5’−ジ−t−ブチル−4’−ヒドロキシルフェニル)プロピオネート]メタン
(ii)リン系酸化防止剤:イルガフォス168(IF168;チバ社製);トリス(2,4−ジ−tert−ブチルフェノール)フォスファイト
(3) Antioxidant (i) Hindered phenol antioxidant: Irganox 1010 (IR1010; manufactured by Ciba); Tetrakis [methylene-3- (3 ′, 5′-di-t-butyl-4′-] Hydroxylphenyl) propionate] methane (ii) phosphorus antioxidant: Irgafos 168 (IF168; manufactured by Ciba); Tris (2,4-di-tert-butylphenol) phosphite

(4)中和剤
(i)ステアリン酸カルシウム(CAST;日本油脂(株)社製)
(4) Neutralizing agent (i) Calcium stearate (CAST; manufactured by NOF Corporation)

参考例(実施例1〜実施例6、比較例1〜9)
プロピレン系重合体、透明化核剤及び他の添加剤(酸化防止剤、中和剤)を表1に記載の配合割合(重量部)で準備し、スーパーミキサーでドライブレンドした後、35ミリ径の2軸押出機を用いて溶融混練した。ダイ出口部温度200℃でダイから押し出しペレット化し、得られたペレットを用いて物性を測定した。その結果を表1に示す。
( Reference Examples ( Examples ) 1 to 5 , Example 6, Comparative Examples 1 to 9)
After preparing propylene polymer, clearing nucleating agent and other additives (antioxidant, neutralizing agent) at the blending ratio (parts by weight) shown in Table 1, dry blending with a super mixer, 35 mm diameter Were melt-kneaded using a twin-screw extruder. Extrusion pelletization was performed from the die at a die outlet temperature of 200 ° C., and physical properties were measured using the obtained pellets. The results are shown in Table 1.

Figure 0005175682
Figure 0005175682

表1から明らかなように、実施例1〜4は、プロピレン単独重合体−1の100重量部に対して、当該透明化核剤(A)を0.1、0.2、0.3及び0.6重量部配合したもので、透明化核剤を添加していない比較例1に比べて透明性が良好であり、成形サイクルも短縮できる。特に、実施例3に示すように、透明化核剤(A)を、0.3重量部添加したものでは、公知の透明化核剤を添加した比較例2〜3と比べても、透明性のみならず、成形加工性が優れていることがわかる。また、芳香族アルデヒド発生量も少なく、臭気も非常に良好であることが分かる。
実施例5は、プロピレン系重合体としてプロピレン・エチレンランダム共重合体−1を用い、それに当該透明化核剤(A)を0.3重量部配合したものであり、プロピレン単独重合体を用いた場合よりも透明性がさらに優れていることが分かる。また、同じプロピレン系重合体に公知の透明化核剤を添加した比較例5、6と比べて、透明性、臭気、成形サイクルが良好である。
実施例6は、メタロセン触媒で重合されたプロピレン・エチレンランダム共重合体−2を用いたものであるが、他のチーグラー・ナッタ触媒により重合されたプロピレン系重合体を用いた場合よりも、さらに透明性と臭気が向上することが分かる。また、同じプロピレン系重合体に公知の透明化核剤を添加した比較例8、9と比べて、透明性、臭気、成形サイクルが良好である。
As can be seen from Table 1, in Examples 1-4, the clearing nucleating agent (A) is 0.1, 0.2, 0.3 and 100 parts by weight of propylene homopolymer-1. It is a blend of 0.6 parts by weight, has better transparency than Comparative Example 1 in which no clearing nucleating agent is added, and can shorten the molding cycle. In particular, as shown in Example 3, the transparent nucleating agent (A) added with 0.3 parts by weight was more transparent than Comparative Examples 2 to 3 to which a known transparent nucleating agent was added. In addition, it can be seen that the moldability is excellent. It can also be seen that the amount of aromatic aldehyde generated is small and the odor is very good.
In Example 5, propylene / ethylene random copolymer-1 was used as a propylene-based polymer, and 0.3 parts by weight of the clearing nucleating agent (A) was blended therein, and a propylene homopolymer was used. It can be seen that the transparency is even better than the case. Moreover, transparency, odor, and a molding cycle are favorable compared with the comparative examples 5 and 6 which added the well-known clearing nucleating agent to the same propylene polymer.
Example 6 uses propylene / ethylene random copolymer-2 polymerized with a metallocene catalyst, but more than when using a propylene polymer polymerized with another Ziegler-Natta catalyst. It can be seen that transparency and odor are improved. Moreover, transparency, odor, and a molding cycle are favorable compared with the comparative examples 8 and 9 which added the well-known clearing nucleating agent to the same propylene polymer.

本発明のプロピレン系樹脂組成物及びその成形品は、従来の透明化核剤では達成ができなかった優れた透明性及び成形加工性を有しているため、公知の成形方法によって、容易に透明性の優れる成形品を提供することができる。また、本発明のプロピレン系樹脂組成物及びその成形品は、芳香族アルデヒド発生量が少なく臭気にも優れており、これらの特徴から、食品容器、キャップ、医療用器具、医療用容器、包装用フィルム、文具向けシート、衣装ケース、日用品、自動車部品、電気部品等の用途に極めて有用である。   The propylene-based resin composition and molded product of the present invention have excellent transparency and molding processability that could not be achieved by conventional clearing nucleating agents. A molded product having excellent properties can be provided. In addition, the propylene-based resin composition of the present invention and the molded product thereof have a small amount of aromatic aldehyde generation and excellent odor. From these characteristics, food containers, caps, medical instruments, medical containers, and packaging It is extremely useful for applications such as film, sheet for stationery, costume case, daily necessities, automobile parts, and electrical parts.

Claims (2)

メタロセン触媒によって重合されたプロピレン系重合体100重量部に対し、下記化学構造式(1)で示される透明化核剤(A)を0.01〜2.0重量部配合することを特徴とするプロピレン系樹脂組成物。
Figure 0005175682
0.01 to 2.0 parts by weight of a clearing nucleating agent (A) represented by the following chemical structural formula (1) is blended with 100 parts by weight of a propylene polymer polymerized by a metallocene catalyst. Propylene-based resin composition.
Figure 0005175682
請求項に記載のプロピレン系樹脂組成物を用いることを特徴とする成形品。 A molded product comprising the propylene-based resin composition according to claim 1 .
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