JP6495676B2 - Vinyl chloride resin composition - Google Patents
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- JP6495676B2 JP6495676B2 JP2015025234A JP2015025234A JP6495676B2 JP 6495676 B2 JP6495676 B2 JP 6495676B2 JP 2015025234 A JP2015025234 A JP 2015025234A JP 2015025234 A JP2015025234 A JP 2015025234A JP 6495676 B2 JP6495676 B2 JP 6495676B2
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Description
本発明は、塩化ビニル系樹脂組成物に関する。更に詳しくは、継手、硬質板、パイプなどの建築部材、電装部材、工業部品、自動車用材料、おもちゃ、医療関連製品、及び食品関連製品の材料として好適に用いることのできる硬質塩化ビニル系樹脂組成物に関する。
The present invention relates to a vinyl chloride resin composition. More specifically, a hard vinyl chloride resin composition that can be suitably used as a material for building members such as joints, hard plates, pipes, electrical components, industrial parts, automotive materials, toys, medical-related products, and food-related products. Related to things.
従来から、塩化ビニル系樹脂に少量の可塑剤等を配合した硬質塩化ビニル系樹脂組成物は、安価であることから、建築部材、電装部材、工業部品、自動車用材料、おもちゃ、医療関連製品、及び食品関連製品等の幅広い分野に用いられている。ところが硬質塩化ビニル系樹脂組成物には、その熱分解温度が常用される加工温度に近い上に、流動性が高くないため、成形品にフィッシュアイなどの外観不良を生じ易いという加工性の問題があった。 Conventionally, a hard vinyl chloride resin composition in which a small amount of a plasticizer is blended with a vinyl chloride resin is inexpensive, so it is a building member, an electrical component, an industrial part, an automotive material, a toy, a medical product, And used in a wide range of fields such as food-related products. However, in the hard vinyl chloride resin composition, the thermal decomposition temperature is close to the processing temperature that is commonly used, and the fluidity is not high. was there.
そこで塩化ビニルモノマーと酢酸ビニルなどの他のモノマーとの共重合体を用いる技術、（メタ）アクリル系重合体などの他の樹脂を配合する技術（例えば、特許文献１）が提案されている。しかし、共重合体を用いる技術は、成形品の機械的強度が低下するという点で、十分に満足できるものではない。また他の樹脂を配合する技術は、塩化ビニル系樹脂と他の樹脂との相容性・混和性に起因する外観不良が生じ易いという点で、十分に満足できるものではない。
Therefore, a technique using a copolymer of a vinyl chloride monomer and another monomer such as vinyl acetate and a technique of blending another resin such as a (meth) acrylic polymer (for example, Patent Document 1) have been proposed. However, the technique using a copolymer is not fully satisfactory in that the mechanical strength of a molded product is lowered. In addition, the technique of blending other resins is not fully satisfactory in that appearance defects easily occur due to compatibility and miscibility between the vinyl chloride resin and other resins.
本発明の課題は、押出成形加工性及び射出成形加工性の何れにも優れ、継手、硬質板、パイプなどの建築部材、電装部材、工業部品、自動車用材料、おもちゃ、医療関連製品、及び食品関連製品の材料として好適に用いることのできる硬質塩化ビニル系樹脂組成物を提供することにある。
The object of the present invention is excellent in both extrusion processability and injection moldability, and is a building member such as a joint, a hard plate and a pipe, an electrical component, an industrial part, an automotive material, a toy, a medical product, and a food. An object of the present invention is to provide a hard vinyl chloride resin composition that can be suitably used as a material for related products.
本発明者は、鋭意研究した結果、特定の塩化ビニル系樹脂の樹脂組成物により、上記課題を達成できることを見出した。 As a result of intensive studies, the present inventor has found that the above-mentioned problems can be achieved by a specific vinyl chloride resin composition.
すなわち、本発明は、（ａ）下記（１）及び（２）の特徴を満たす塩化ビニル系樹脂 １００質量部；及び
（ｂ）可塑剤 １５質量部以下；を含む塩化ビニル系樹脂組成物である。
（１）ゲル浸透クロマトグラフィにより測定した微分分子量分布曲線のポリスチレン換算質量平均分子量が９８，５００以上１１０，０００以下である。
（２）分子量分布Ｍｗ／Ｍｎが１．８０〜１．９５である。但し、Ｍｗはゲル浸透クロマトグラフィにより測定した微分分子量分布曲線のポリスチレン換算質量平均分子量であり、Ｍｎはポリスチレン換算数平均分子量である。
That is, the present invention is a vinyl chloride resin composition comprising (a) 100 parts by mass of a vinyl chloride resin satisfying the following characteristics (1) and (2); and (b) 15 parts by mass or less of a plasticizer. .
(1) The polystyrene-reduced mass average molecular weight of the differential molecular weight distribution curve measured by gel permeation chromatography is 98,500 or more and 110,000 or less.
(2) The molecular weight distribution Mw / Mn is 1.80 to 1.95. However, Mw is the polystyrene conversion mass average molecular weight of the differential molecular weight distribution curve measured by gel permeation chromatography, and Mn is the polystyrene conversion number average molecular weight.
第２の発明は、第１の発明に記載の樹脂組成物を含む物品である。
The second invention is an article comprising the resin composition according to the first invention.
本発明の硬質塩化ビニル系樹脂組成物は、押出成形加工性及び射出成形加工性の何れにも優れ、フィッシュアイなどの外観不良のない美麗な成形品を得ることができる。そのため継手、硬質板、パイプなどの建築部材、電装部材、工業部品、自動車用材料、おもちゃ、医療関連製品、及び食品関連製品の材料として好適に用いることができる。
The hard vinyl chloride resin composition of the present invention is excellent in both extrusion processability and injection moldability, and can provide a beautiful molded product having no appearance defects such as fish eyes. Therefore, it can be suitably used as a material for building members such as joints, hard plates, pipes, electrical components, industrial parts, automotive materials, toys, medical-related products, and food-related products.
成分（ａ）「塩化ビニル系樹脂」：
本発明の成分（ａ）として用いる塩化ビニル系樹脂は、−ＣＨ２−ＣＨＣｌ−で表される基を有する全ての重合体を指し、塩化ビニルの単独重合体；塩化ビニル・酢酸ビニル共重合体、塩化ビニル・（メタ）アクリル酸共重合体、塩化ビニル・（メタ）アクリル酸メチル共重合体、塩化ビニル・（メタ）アクリル酸エチル共重合体、塩化ビニル・マレイン酸エステル共重合体、塩化ビニル・エチレン共重合体、塩化ビニル・プロピレン共重合体、塩化ビニル・スチレン共重合体、塩化ビニル・イソブチレン共重合体、塩化ビニル・塩化ビニリデン共重合体、塩化ビニル・スチレン・無水マレイン酸三元共重合体、塩化ビニル・スチレン・アクリロニトリル三元共重合体、塩化ビニル・ブタジエン共重合体、塩化ビニル・イソプレン共重合体、塩化ビニル・塩素化プロピレン共重合体、塩化ビニル・塩化ビニリデン・酢酸ビニル三元共重合体、塩化ビニル・アクリロニトリル共重合体、塩化ビニル・各種ビニルエーテル共重合体等の塩化ビニルと塩化ビニルと共重合可能な他のモノマーとの共重合体；後塩素化ビニル共重合体等の塩化ビニル単独重合体や塩化ビニル系共重合体を改質したもの；さらには塩素化ポリエチレン等の構造上塩化ビニル樹脂と類似の塩素化ポリオレフィンを包含する。
Component (a) “vinyl chloride resin”:
The vinyl chloride resin used as component (a) of the present invention refers to all polymers having a group represented by —CH 2 —CHCl—, a vinyl chloride homopolymer; a vinyl chloride / vinyl acetate copolymer. , Vinyl chloride / (meth) acrylic acid copolymer, vinyl chloride / (meth) methyl acrylate copolymer, vinyl chloride / (meth) ethyl acrylate copolymer, vinyl chloride / maleic acid ester copolymer, chloride Vinyl / ethylene copolymer, vinyl chloride / propylene copolymer, vinyl chloride / styrene copolymer, vinyl chloride / isobutylene copolymer, vinyl chloride / vinylidene chloride copolymer, vinyl chloride / styrene / maleic anhydride ternary Copolymer, vinyl chloride / styrene / acrylonitrile terpolymer, vinyl chloride / butadiene copolymer, vinyl chloride / isoprene copolymer Copolymerized with vinyl chloride and vinyl chloride, such as vinyl chloride / chlorinated propylene copolymer, vinyl chloride / vinylidene chloride / vinyl acetate terpolymer, vinyl chloride / acrylonitrile copolymer, vinyl chloride / various vinyl ether copolymers, etc. Copolymers with other possible monomers; Post-chlorinated vinyl copolymers and other vinyl chloride homopolymers and modified vinyl chloride copolymers; and structurally vinyl chloride resins such as chlorinated polyethylene And similar chlorinated polyolefins.
これらの中で、成形品の機械的強度の観点から、塩化ビニルの単独重合体が好ましい。 Among these, a vinyl chloride homopolymer is preferable from the viewpoint of the mechanical strength of the molded product.
上記成分（ａ）は、（１）ゲル浸透クロマトグラフィ（以下、「ＧＰＣ」と略すことがある。）により測定したＧＰＣ曲線のポリスチレン換算質量平均分子量（以下、「Ｍｗ」と略すことがある。）が、９８，５００以上、１１０，０００以下、好ましくは９９，５００以上、１０１，０００以下である。 The component (a) is (1) a polystyrene-reduced mass average molecular weight (hereinafter abbreviated as “Mw”) of a GPC curve measured by gel permeation chromatography (hereinafter abbreviated as “GPC”). Is 98,500 or more and 110,000 or less, preferably 99,500 or more and 101,000 or less.
また上記成分（ａ）は、（２）分子量分布Ｍｗ／Ｍｎが１．８０〜１．９５、好ましくは１．８３〜１．９２である。ここでＭｎはＧＰＣにより測定したＧＰＣ曲線のポリスチレン換算数平均分子量である。Ｍｗについては上述した。 The component (a) has (2) a molecular weight distribution Mw / Mn of 1.80 to 1.95, preferably 1.83 to 1.92. Here, Mn is a polystyrene equivalent number average molecular weight of a GPC curve measured by GPC. Mw has been described above.
上記成分（ａ）のＭｗが上記範囲にあり、かつ、Ｍｗ／Ｍｎが上記範囲にあるときに、押出成形加工性及び射出成形加工性の何れにも優れ、フィッシュアイなどの外観不良のない美麗な成形品を得ることができることは、特異的であり、驚くべきことである。 When Mw of the component (a) is in the above range and Mw / Mn is in the above range, both the extrusion processability and the injection moldability are excellent, and there is no appearance defect such as fish eye. It is unique and surprising to be able to obtain a simple molded product.
上記成分（ａ）としては、これらの塩化ビニル系樹脂の１種又は２種以上の混合物を用いることができる。なお上記成分（ａ）として２種以上の混合物を用いる場合には、混合物として上記特性（１）及び上記特性（２）を満たすようにする。 As the component (a), one or a mixture of two or more of these vinyl chloride resins can be used. In addition, when using 2 or more types of mixtures as said component (a), it is made to satisfy | fill said characteristic (1) and said characteristic (2) as a mixture.
成分（ｂ）「可塑剤」：
上記成分（ｂ）としては、塩化ビニル系樹脂組成物に通常使用される可塑剤であれば制限されず、任意の可塑剤を用いることができる。
Component (b) “Plasticizer”:
The component (b) is not limited as long as it is a plasticizer usually used in vinyl chloride resin compositions, and any plasticizer can be used.
上記成分（ｂ）としては、例えば、フタル酸エステル系化合物、アジピン酸エステル系化合物、セバシン酸エステル系化合物、アゼライン酸エステル系化合物、トリメリット酸エステル系化合物、ピロメリット酸エステル系化合物、リン酸エステル系化合物、ポリエステル系化合物、エポキシ系化合物、塩素化パラフィン、芳香族炭化水素系化合物、及び石油系炭化水素化合物などをあげることができる。上記成分（ｂ）としては、これらの１種あるいは２種以上の混合物を用いることができる。 Examples of the component (b) include phthalic acid ester compounds, adipic acid ester compounds, sebacic acid ester compounds, azelaic acid ester compounds, trimellitic acid ester compounds, pyromellitic acid ester compounds, and phosphoric acid. Examples thereof include ester compounds, polyester compounds, epoxy compounds, chlorinated paraffins, aromatic hydrocarbon compounds, and petroleum hydrocarbon compounds. As said component (b), these 1 type, or 2 or more types of mixtures can be used.
上記成分（ｂ）の配合量は、上記成分（ａ）１００質量部に対して、硬質塩化ビニル系樹脂組成物に要求される機械的強度を保持する観点から、通常１５質量部以下、好ましくは１０質量部以下である。また加工性の観点から、通常０．１質量部以上、好ましくは１質量部以上である。 The amount of the component (b) is usually 15 parts by mass or less, preferably from the viewpoint of maintaining the mechanical strength required for the hard vinyl chloride resin composition with respect to 100 parts by mass of the component (a). It is 10 parts by mass or less. Moreover, from a workability viewpoint, it is 0.1 mass part or more normally, Preferably it is 1 mass part or more.
本発明の樹脂組成物には、塩化ビニル系樹脂及びその樹脂組成物に通常用いられる安定剤を、更に含ませることができる。上記安定剤としては、例えば、有機スズ化合物系、バリウム−亜鉛系、カルシウム−亜鉛系、及び鉛系の安定剤などをあげることができる。これらの中で、環境問題の観点から、有機スズ化合物系、バリウム−亜鉛系、及びカルシウム−亜鉛系の安定剤が好ましく、熱安定性の観点から有機スズ化合物系が好ましい。安定剤の配合量は、上記成分（ａ）１００質量部に対して、０．１〜１０質量部が好ましい。 The resin composition of the present invention may further contain a vinyl chloride resin and a stabilizer usually used for the resin composition. Examples of the stabilizer include organotin compound-based, barium-zinc-based, calcium-zinc-based, and lead-based stabilizers. Among these, from the viewpoint of environmental problems, organotin compound-based, barium-zinc-based, and calcium-zinc-based stabilizers are preferable, and from the viewpoint of thermal stability, organotin compound-based is preferable. As for the compounding quantity of a stabilizer, 0.1-10 mass parts is preferable with respect to 100 mass parts of said components (a).
本発明の樹脂組成物には、各種金属セッケン、脂肪酸、及びポリエチレンワックスなどの滑剤を、更に含ませることができる。滑剤の配合量は、上記成分（ａ）１００質量部に対して、０．１〜１０質量部が好ましい。 The resin composition of the present invention may further contain various metal soaps, fatty acids, and lubricants such as polyethylene wax. The blending amount of the lubricant is preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the component (a).
本発明の樹脂組成物には、本発明の目的に反しない限度において、所望により、塩化ビニル系樹脂及びその樹脂組成物に通常用いられる各種添加剤（例えば、熱安定剤、充填剤、滑剤、発泡剤、顔料、及び紫外線吸収剤など）を更に含ませることができる。 In the resin composition of the present invention, the vinyl chloride resin and various additives usually used in the resin composition (for example, heat stabilizer, filler, lubricant, Foaming agents, pigments, UV absorbers, etc.) can be further included.
本発明の樹脂組成物は、上記成分（ａ）、上記成分（ｂ）、及び所望に応じて用いる任意成分を、任意の溶融混練機（例えば、単軸押出機、二軸押出機、ロール、ミキサー、及び各種のニーダーなど。）を使用して溶融混練することにより得ることができる。好ましくは二軸押出機を用い、樹脂温度１５０〜１８０℃で溶融混練することにより得ることができる。
In the resin composition of the present invention, the above component (a), the above component (b), and an optional component used as desired can be mixed with any melt kneader (for example, a single screw extruder, a twin screw extruder, a roll, It can be obtained by melt-kneading using a mixer and various kneaders. Preferably, it can be obtained by melt kneading at a resin temperature of 150 to 180 ° C. using a twin screw extruder.
以下、本発明を実施例により説明するが、本発明はこれらに限定されるものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to these.
使用した原材料
成分（ａ）：
（ａ−１）Ｍｗ＝１００，０００、Ｍｗ／Ｍｎ＝１．８８の塩化ビニル単独重合体。
（ａ−２）Ｍｗ＝９９，０００、Ｍｗ／Ｍｎ＝１．８８の塩化ビニル単独重合体。
（ａ−３）Ｍｗ＝１０５，０００、Ｍｗ／Ｍｎ＝１．８８の塩化ビニル単独重合体。
（ａ−４）Ｍｗ＝１００，０００、Ｍｗ／Ｍｎ＝１．８２の塩化ビニル単独重合体。
（ａ−５）Ｍｗ＝１００，０００、Ｍｗ／Ｍｎ＝１．９３の塩化ビニル単独重合体。
Raw materials used Component (a):
(A-1) Vinyl chloride homopolymer having Mw = 100,000 and Mw / Mn = 1.88.
(A-2) Vinyl chloride homopolymer having Mw = 99,000 and Mw / Mn = 1.88.
(A-3) Vinyl chloride homopolymer having Mw = 105,000 and Mw / Mn = 1.88.
(A-4) Vinyl chloride homopolymer having Mw = 100,000 and Mw / Mn = 1.82.
(A-5) Vinyl chloride homopolymer having Mw = 100,000 and Mw / Mn = 1.93.
比較成分（ａ’）：
（ａ’−１）Ｍｗ＝１００，０００、Ｍｗ／Ｍｎ＝１．７７の塩化ビニル単独重合体。
（ａ’−２）Ｍｗ＝１００，０００、Ｍｗ／Ｍｎ＝１．９８の塩化ビニル単独重合体。
（ａ’−３）Ｍｗ＝９７，０００、Ｍｗ／Ｍｎ＝１．８８の塩化ビニル単独重合体。
（ａ’−４）Ｍｗ＝１３０，０００、Ｍｗ／Ｍｎ＝１．８８の塩化ビニル単独重合体。
Comparative component (a ′):
(A′-1) Vinyl chloride homopolymer having Mw = 100,000 and Mw / Mn = 1.77.
(A′-2) Vinyl chloride homopolymer having Mw = 100,000 and Mw / Mn = 1.98.
(A′-3) Vinyl chloride homopolymer having Mw = 97,000 and Mw / Mn = 1.88.
(A′-4) Vinyl chloride homopolymer having Mw = 130,000 and Mw / Mn = 1.88.
成分（ｂ）：
（ｂ−１）株式会社ＡＤＥＫＡのエポキシ化大豆油「Ｏ−１３０Ｐ（商品名）」。
（ｂ−２）ジェイプラス株式会社のジ−２−エチルヘキシルフタレート「ＤＯＰ（商品名）」。
Component (b):
(B-1) Epoxidized soybean oil “O-130P (trade name)” by ADEKA Corporation.
(B-2) Di-2-ethylhexyl phthalate “DOP (trade name)” of JPLUS Corporation.
任意成分（ｃ）：
（ｃ−１）株式会社ＡＤＥＫＡのジオクチル錫メルカプト系安定剤「アデカスタブ４６５（商品名）」。
（ｃ−２）株式会社ＡＤＥＫＡのバリウム−亜鉛系複合安定性。
（ｃ−３）三井化学株式会社のポリエチレンワックス系滑剤「ハイワックス４２０２Ｅ（商品名）」。
Optional component (c):
(C-1) Dioctyltin mercapto stabilizer “ADEKA STAB 465 (trade name)” by ADEKA Corporation.
(C-2) Barium-zinc composite stability of ADEKA Corporation.
(C-3) Polyethylene wax lubricant “High Wax 4202E (trade name)” manufactured by Mitsui Chemicals, Inc.
測定方法
（１）押出成形性：
５０ｍｍφ押出機にＬ／Ｄ＝２２、ＣＲ＝３．５のスクリュウ、及び１２ｍｍφ、肉厚１ｍｍのパイプダイ（口金内面クロムメッキ）を装着した装置を使用し、温度設定Ｃ１／Ｃ２／Ｃ３／Ｃ４／Ｄ１／Ｄ２＝１２０℃／１４０℃／１５０℃／１６０℃／１７０℃／１７０℃、スクリュウ回転数４０ｒｐｍ、及び吐出量１５ｋｇ／ｈｒの条件で、パイプを押出成形し、以下の基準で評価した。
◎：ドローダウン性、成形体表面外観、及び成形体形状の全てが良好である。
○：成形体の表面にやや肌荒れがあるが、ドローダウン性と成形体形状は良好である。
△：成形体の表面に肌荒れがあり、形状にも乱れがあるが、ドローダウン性は良好である。
×：成形体の表面に顕著な肌荒れがあり、形状にも大きな乱れがある。またドローダウン性も悪い。
Measuring method (1) Extrudability:
Temperature setting C1 / C2 / C3 / C4 / using a 50mmφ extruder equipped with L / D = 22, CR = 3.5 screw and 12mmφ, 1mm thick pipe die (internal chrome plating) A pipe was extruded under the conditions of D1 / D2 = 120 ° C./140° C./150° C./160° C./170° C./170° C., a screw rotational speed of 40 rpm, and a discharge amount of 15 kg / hr, and evaluated according to the following criteria.
(Double-circle): Drawdown property, a molded object surface appearance, and a molded object shape are all favorable.
○: Although the surface of the molded body is somewhat rough, the drawdown property and the molded body shape are good.
(Triangle | delta): Although the surface of a molded object has rough skin and a shape is disordered, drawdown property is favorable.
X: Remarkable skin roughness is observed on the surface of the molded body, and the shape is greatly disturbed. Also, the drawdown property is bad.
（２）射出成形性：
型締圧１２０トンの射出成形機を用い、幅１０ｍｍ×長さ８０ｍｍ×厚さ２ｍｍのシート状の試験片を、成形温度１８０℃、金型温度４０℃、射出速度５０ｍｍ／秒、射出圧力１４００Ｋｇ／ｃｍ２、保圧圧力４００〜１４００Ｋｇ／ｃｍ２、射出時間１０秒、及び冷却時間４５秒の成形条件で成形した。得られた試験片について、ヒケ、フローマーク、及びウェルドマークの有無を、目視観察し、以下の基準で評価した。
◎：ヒケ、フローマーク及びウェルドマークは認められない。
○：ヒケ、フローマーク又はウェルドマークがわずかに認められる。
△：ヒケ、フローマーク及びウェルドマークが認められる。
×：甚だしいヒケ、フローマーク及びウェルドマークが認められる。
(2) Injection moldability:
Using an injection molding machine with a mold clamping pressure of 120 tons, a sheet-like test piece having a width of 10 mm, a length of 80 mm, and a thickness of 2 mm was molded at a molding temperature of 180 ° C., a mold temperature of 40 ° C., an injection speed of 50 mm / second, and an injection pressure of 1400 kg. / Cm 2 , holding pressure 400 to 1400 kg / cm 2 , molding time 10 seconds, and cooling time 45 seconds. About the obtained test piece, the presence or absence of sink marks, flow marks, and weld marks was visually observed and evaluated according to the following criteria.
A: Sink marks, flow marks and weld marks are not recognized.
○: Slight sink marks, flow marks or weld marks are observed.
Δ: Sink marks, flow marks and weld marks are observed.
X: Severe sink marks, flow marks and weld marks are recognized.
（３）フィッシュアイ：
上記試験（１）で得たパイプを５０ｃｍ採取し、フィッシュアイが発生しているか否かを目視観察し、国立印刷局のきょう雑物測定図表を用いて測定した０．７ｍｍ２超のフィッシュアイを大、０．３〜０．７ｍｍ２を中、０．３ｍｍ２未満を小として、その個数から以下の基準で評価した。
◎：大０個、中と小の合計２個以下。
○：大０個、中と小の合計１０個以下。
×：大１個以上、又は中と小の合計１０個超。
(3) Fisheye:
The pipe was obtained in the above test (1) was 50cm collected, whether fish eyes occurs was visually observed, 0.7 mm 2 than fish eyes was measured using today matters measurement chart National Printing Bureau large, in 0.3 to 0.7 mm 2, less than 0.3 mm 2 as a small, and evaluated according to the following criteria from the number.
A: 0 large, 2 or less in total, medium and small.
○: Large 0, medium and small total 10 or less.
X: Large one or more, or more than 10 in total, medium and small.
実施例１〜１０、比較例１〜４
表１又は２に示す量（質量部）の成分を、リボンブレンダ―を使用して均一に混合した後、二軸押出機を用いて１６０℃で溶融混練し、樹脂組成物を得た。上記（１）〜（３）の評価を行った。結果を表１又は２に示す。
Examples 1-10, Comparative Examples 1-4
The components (parts by mass) shown in Table 1 or 2 were uniformly mixed using a ribbon blender, and then melt kneaded at 160 ° C. using a twin screw extruder to obtain a resin composition. The above evaluations (1) to (3) were performed. The results are shown in Table 1 or 2.
本発明の塩化ビニル系樹脂組成物は、押出成形加工性及び射出成形加工性の何れにも優れ、フィッシュアイなどの外観不良のない美麗な成形品を得ることができた。 The vinyl chloride resin composition of the present invention was excellent in both extrusion molding processability and injection molding processability, and it was possible to obtain a beautiful molded product having no appearance defects such as fish eyes.
一方、比較例１〜４は、押出成形性が低いか又はフィッシュアイが多数あり、射出成形性も不十分であった。
On the other hand, Comparative Examples 1 to 4 had low extrusion moldability or many fish eyes, and injection moldability was insufficient.
Claims (2)
（ｂ）可塑剤 １５質量部以下；
を含む塩化ビニル系樹脂組成物。
（１）ゲル浸透クロマトグラフィにより測定した微分分子量分布曲線のポリスチレン換算質量平均分子量が９８，５００以上１１０，０００以下である。
（２）分子量分布Ｍｗ／Ｍｎが１．８０〜１．９５である。但し、Ｍｗはゲル浸透クロマトグラフィにより測定した微分分子量分布曲線のポリスチレン換算質量平均分子量であり、Ｍｎはポリスチレン換算数平均分子量である。
(A) 100 parts by mass of a vinyl chloride homopolymer satisfying the following characteristics (1) and (2); and (b) 15 parts by mass or less of a plasticizer;
A vinyl chloride resin composition comprising:
(1) The polystyrene-reduced mass average molecular weight of the differential molecular weight distribution curve measured by gel permeation chromatography is 98,500 or more and 110,000 or less.
(2) The molecular weight distribution Mw / Mn is 1.80 to 1.95. However, Mw is the polystyrene conversion mass average molecular weight of the differential molecular weight distribution curve measured by gel permeation chromatography, and Mn is the polystyrene conversion number average molecular weight.
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| JPS61197611A (en) * | 1985-02-27 | 1986-09-01 | Showa Denko Kk | Production of acetylene high polymer |
| AU3584389A (en) * | 1988-06-06 | 1989-12-07 | B.F. Goodrich Company, The | Rigid vinyl polymer articles resistant to discoloration from gamma radiation |
| JPH03223307A (en) * | 1990-01-30 | 1991-10-02 | Mitsubishi Kasei Vinyl Co | Production of vinyl chloride resin |
| US6838535B2 (en) * | 2001-03-23 | 2005-01-04 | University Of Pennsylvania | Process for the living radical polymerization of chlorine containing monomers |
| JP2002363362A (en) * | 2001-05-31 | 2002-12-18 | Kanegafuchi Chem Ind Co Ltd | Vinyl chloride-based resin composition |
| JP2007002138A (en) * | 2005-06-24 | 2007-01-11 | Showa Kasei Kogyo Kk | Hard vinyl chloride based resin composition and molded part using it |
| JP2007056195A (en) * | 2005-08-26 | 2007-03-08 | Mitsubishi Plastics Ind Ltd | Vinyl chloride-based resin composition and stretch film |
| US20070260006A1 (en) * | 2006-05-03 | 2007-11-08 | Whitson Russell L | Rigid polyvinyl chloride polymer compositions having improved impact properties |
| JP2009067840A (en) * | 2007-09-11 | 2009-04-02 | Jsr Corp | Method for producing polymer |
| JP2012122033A (en) * | 2010-12-10 | 2012-06-28 | Tosoh Corp | Method for producing vinyl chloride polymer |
| JP2013227407A (en) * | 2012-04-25 | 2013-11-07 | Tosoh Corp | Method for removing thiocarbonylthio terminal of vinyl chloride polymer |
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