发明名称 |
Cycloolefin polymer composition |
摘要 |
<p>There is provided a cycloolefin polymer composition comprising 8 to 40 % by weight of a cycloolefin polymer [A] and 92 to 60 % by weight of a cycloolefin polymer [B], both having specific properties, wherein a difference DELTA nD = ¦nD(A) - nD(B)¦ between the refractive index nD(A) of the polymer [A] and the refractive index nD(B) of the polymer [B] is not more than 0.015. This composition is excellent in impact resistance, transparency and heat resistance, and has a good balance of these properties. There is also provided a cycloolefin copolymer composition comprising 8 to 40 % by weight of a cycloolefin elastomer component [Aa] of an alpha -olefin, a specific cycloolefin and a non-conjugated diene which contains a polymerizable carbon-carbon double bond; and 92 to 60 % by weight of a cycloolefin copolymer component [Ba] which is obtainable by copolymerizing an alpha -olefin and a specific cycloolefin in the presence of the elastomer component [Aa]; wherein a difference DELTA nD = ¦nD(A) - nD(B)¦ between the refractive index nD(Aa) of the component [Aa] and the refractive index nD(Ba) of the component [Ba] is not more than 0.015. This composition has excellent properties inherent in a cycloolefin random copolymer and is improved especially in impact resistance without tranding off its transparency. There is also provided a cycloolefin copolymer composition comprising 8 to 40 % by weight of a cycloolefin elastomer component [A alpha ] of an alpha -olefin and a specific cycloolefin which substantially contains no polymerizable carbon-carbon double bond; and 92 to 60 % by weight of a cycloolefin copolymer component [B alpha ] which is obtainable by copolymerizing an alpha -olefin and a specific cycloolefin in the presence of the elastomer component [A alpha ]; wherein a difference DELTA nD = ¦nD(A) - nD(B)¦ between the refractive index nD(A alpha ) of the component [A alpha ] and the refractive index nD(B alpha ) of the component [B alpha ] is not more than 0.015. This composition has also excellent properties inherent in a cycloolefin random copolymer and is improved particularly in impact resistance without trading off its transparency.</p> |
申请公布号 |
EP0608903(B1) |
申请公布日期 |
1999.04.07 |
申请号 |
EP19940101317 |
申请日期 |
1994.01.28 |
申请人 |
MITSUI CHEMICALS, INC. |
发明人 |
ABE, YOSHIHARU;SAGANE, TOSHIHIRO;TSUJI, YOICHIRO |
分类号 |
C08G61/08;C08L65/00;(IPC1-7):C08G61/08 |
主分类号 |
C08G61/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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