RESIN COMPOSITION FOR PRESS MOLDING AND PRESS MOLDED BODY
To provide a resin composition for press molding comprising a cyclic olefin copolymer which gives a press molded body having excellent breaking strain and toughness and having less coloration and to provide a press molded body comprising the resin composition for press molding.SOLUTION: There is pro...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a resin composition for press molding comprising a cyclic olefin copolymer which gives a press molded body having excellent breaking strain and toughness and having less coloration and to provide a press molded body comprising the resin composition for press molding.SOLUTION: There is provided a resin composition for press molding comprising (A) a cyclic olefin copolymer and a specific amount of (B) a hindered phenol-based antioxidant, wherein the amount of the structural unit derived from the α-olefin is adjusted to be 10 mol% or more and 40 mol% or less based on the total structural units and the cyclic olefin copolymer (A) is adjusted to have two or more glass transition temperatures in the range of 0°C to 300°C as determined by solid viscoelasticity measurement in the cyclic olefin copolymer (A) by using a copolymer of a cyclic olefin monomer and an α-olefin having 3 or more and 20 or less carbon atoms as the cyclic olefin copolymer (A).SELECTED DRAWING: None
【課題】優れた破断歪と優れた靭性とを兼ね備え、着色の少ないプレス成形体を与える、環状オレフィン共重合体を含むプレス成形用樹脂組成物と、当該プレス成形用樹脂組成物からなるプレス成形体とを提供すること。【解決手段】(A)環状オレフィン共重合体と、特定量の(B)ヒンダードフェノール系酸化防止剤とを含むプレス成形用樹脂組成物において、(A)環状オレフィン共重合体として、環状オレフィンモノマーと、炭素原子数3以上20以下のα-オレフィンとの共重合体を用い、(A)環状オレフィン共重合体における、α-オレフィンに由来する構造単位の量を、全構造単位に対して10モル%以上40モル%以下とし、(A)環状オレフィン共重合体が、0℃~300℃の範囲内に固体粘弾性測定により求められるガラス転移温度を2つ以上有するようにする。【選択図】なし |
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