To provide an ethylene/α-olefin/vinylnorbornene copolymer composition that can provide a molded body having a good injection moldability and surface smoothness, and an excellent engine oil barrier property.SOLUTION: Provided is an ethylene/α-olefin/non-conjugated polyene copolymer composition that contains (A) a copolymer (A) having structural unit derived from ethylene (a1), α-olefin (a2) having 3 to 20 carbon atoms, and the following non-conjugated polyene (a3) by 60 to 90 mass%, and (B) a copolymer (B) having structural unit derived from ethylene (b1), α-olefin (b2) having 3 to 20 carbon atoms, and the following non-conjugated polyene (b3) by 40 to 10 mass%. The ethylene/α-olefin/non-conjugated polyene copolymer composition in which the (a3) constituting the (A) is a non-conjugated polyene containing at least one partial structure selected from the following formula (I), and partial structure selected from the group consisting of the following formula (II) by at least one or more in the molecule. The ethylene/α-olefin/non-conjugated polyene copolymer composition in which the (b3) constituting the (B) is a non-conjugated polyene that does not contain a partial structure selected from the group consisting of the formula (II) above in the molecule.SELECTED DRAWING: None
【課題】射出成形性、表面平滑性が良好で、エンジンオイルバリア性に優れる成形体を提供し得るエチレン・α−オレフィン・ビニルノルボルネン共重合体組成物の提供。【解決手段】(A)エチレン(a1)、炭素原子数3〜20のα−オレフィン(a2)、及び下記非共役ポリエン(a3)に由来する構成単位を有する共重合体(A)を60〜90質量%、及び(B)エチレン(b1)、炭素原子数3〜20のα−オレフィン(b2)、及び下記非共役ポリエン(b3)に由来する構成単位を有する共重合体(B)を40〜10質量%で含む。(A)を構成する(a3)が、下式(I)から選ばれる部分構造を少なくとも一つ、及び下式(II)からなる群から選ばれる部分構造を分子中に少なくとも一つ以上含む非共役ポリエンである。(B)を構成する(b3)が、上式(II)からなる群から選ばれる部分構造を分子中に含まない非共役ポリエンである。【選択図】なし
ETHYLENE/α-OLEFIN/NON-CONJUGATED POLYENE COPOLYMER COMPOSITION AND USE THEREOF
エチレン・α−オレフィン・非共役ポリエン共重合体組成物およびその用途
11.10.2021
Patent
Elektronische Ressource
Japanisch
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / C08F MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind |
Ethylene/α-olefin/non-conjugated polyene copolymer, and production process and use thereof
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