ETHYLENE-ALPHA-OLEFIN-NONCONJUGATED POLYENE RANDOM COPOLYMER, RUBBER COMPOSITION, AND PROCESS FOR PREPARING THE RANDOM COPOLYMERS AND THE RUBBER COMPOSITIONS

• Main Authors: TANIZAKI, TATSUYA, SAGANE, TOSHIHIRO, OKADA, KEIJI, TOZO, TETSUO, TSUTSUI, TOSIYUKI, KAWASAKI, MASAAKI
• Format: Patent
• Language: English; Korean
• Published: 01.06.1999
• Edition: 6
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

(a) 에틸렌 (b) 탄소원자수 3이상의 α-올레핀 및 (c) 탄소-탄소 이중결합들중 메탈로센촉매에 의해 중합가능한 하나의 탄소-탄소 이중결합을 한 분자내에 함유하는 비공액폴리엔의 랜덤공중합체이며, 하기와 같은 특성, 즉 (i) (a) 에틸렌으로부터 유도된 단위와 (b) 탄소원자수 3이상의 α-올레핀으로부터 유도된 단위의 몰비[(a)/(b)]가 40/60 - 95/5, (ii) 요드값이 1∼50, (iii) 135℃의 데카린중에서 측정한 극한점도[η]가 0.1∼8.0 d1/g , (iv) 상술한 공중합체의 극한점도[η]와 상기 에틸렌 α-올레핀-비공액 폴리엔 랜덤 공중합체와 동일한 중량 평균분자량(광산란법에 의해 측정)을 가지며, 또한 70몰%의 에틸렌함량을 갖는 선형 에틸렌 프로필렌 공중합체의 극한점도(η)의 비 g η=(η)/(η)이 0.2∼ 0.9 이거나 또는 랜덤공중합체의 극한점도[η]와 140℃의 올소디클로 로벤젠중에서 에틸렌-α-올레핀-비공액 폴리엔 랜덤 공중합체의 침투크로마토그래피에 의해 측정한 에틸렌 함량이 70몰%인 선형에틸렌-프로필렌공중합체로서 계산된 극한점 도[η]의 비 9' =(η)/(η)0.2∼0.9인 에틸렌-α-올레핀-비공액 폴리엔 랜덤 공중합체와 그의 제조방법과 상기 랜덤공중합체를 함유하는 가황성 고무조성물이 제공되며, 상기 에틸렌-α-올레핀-비공액 폴리엔 랜덤 공중합체와 고무조성물은 내후성, 내오존성, 기계강도 및 가공성이 우수하다. Disclosed is an ethylene- alpha -olefin-nonconjugated polyene random copolymer which is a random copolymer of (a) ethylene, (2) an alpha -olefin of 3 or more carbon atoms and (c) a nonconjugated polyene containing, in one molecule, one carbon-to-carbon double bond polymerizable by a metallocene catalyst among carbon-to-carbon double bonds, and has such properties that (i) the copolymer contains (a) units derived from ethylene and (b) units derived from the alpha -olefin of 3 or more carbon atoms in a molar ratio of 40/60 to 95/5 ((a)/(b)), (ii) the iodine value is in the range of 1 to 50, (iii) the intrinsic viscosity ( eta ), as measured in decalin at 135 DEG C, is in the range of 0.1 to 8.0 dl/g, and (iv) the ratio g eta * of the intrinsic viscosity ( eta ) of the copolymer defined above to the intrinsic viscosity ( eta )blank of a linear ethylene-propylene copolymer having the same weight-average molecular weight (measured by light scattering method) as the ethylene- alpha -olefin-nonconjugated polyene random copolymer and having an ethylene content of 70 % by mol, ( eta )/( eta )blank, is in the range of 0.2 to 0.9 or the ratio g' of the intrinsic viscosity ( eta ) of said random copolymer defined above to the intrinsic viscosity ( eta )blank' of a linear ethylene-propylene copolymer having and ethylene content of 70 % by mol which is determined by measurement of gel permeation chromatography (GPC) of ethylene- alpha -olefin-nonconjugated polyene random copolymer in orthodichlorobenzene at 140 DEG C, ( eta )/( eta )blank', is in the reange of 0.2 to 0.9. Also disclosed are a process for preparing the random copolymer and a vulcanizable rubber composition containing the random copolymer. The ethylene- alpha -olefin-nonconjugated polyene random copolymer and the rubber composition are excellent in weathering resistance, ozone resistance, mechanical strength and processability.