C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 23/10 (2006.01) C08F 299/00 (2006.01) C08L 23/12 (2006.01) C08L 23/14 (2006.01) C08L 53/00 (2006.01) C08L 23/08 (2006.01)
Patent
CA 2112021
Disclosed are a polypropylene composition comprising 95 - 55 parts by weight of polypropylene (A) and 5 - 95 parts by weight of an ethylene/1-butene random copolymer (B-1) which contains constituent units derived from 1-butene in an amount of 15 to 25 % by mol; and a polypropylene composition comprising 95 - 55 parts by weight of polypropylene (A) and 5 - 45 parts by weight of an ethylene/1-octene random copolymer (B-2) which contains constituent units derived from 1-octene in an amount of 8 to 20 % by mol. Each of the random copolymers (B-1) and (B-2) has an intrinsic viscosity [~] of 1.5 to 3.5 dl/g as measured in decalin, a glass transition temperature (Tg) of not higher than -50°C, a crystallinity of less than 20 % as measured by X-ray diffractometry, a randomness parameter (B value) of 1.0 to 1.4 as measured by 13C-NMR spectroscopy. With respect to a melting point as measured by a differential scanning calorimeter (DSC) as the main peak, the copolymer (B-1) has a value of not higher than 60 °C, while the copolymer (B-2) has a value of not higher than 80 °C .
Ishimoto Akio
Sugi Masahiro
Wakumoto Hiroshi
Yamaguchi Masayoshi
Mitsui Chemicals Inc.
Mitsui Petrochemical Industries Ltd.
Smart & Biggar
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