Title:
PROPYLENE COPOLYMER AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3423433
Kind Code:
B2
Abstract:
PURPOSE: To obtain a propylene copolymer excellent in stiffness, surface hardness, heat resistance, impact strength, clarity, heat sealability, blocking resistance. and bleed-out resistance.
CONSTITUTION: The copolymer comprises 95-99.5mol% propylene units and 0.5-5mol% ethylene units and has a triad tacticity of propylene chains comprising head-to-tail-bonded propylene units (obtd. by 13C-NMR) of 95.0 % or higher, a ratio of position-irregular units due to 2,1-insertion of propylene units to all the propylene units inserted (obtd. by 13C-NMR) of 0.05-0.5%, and an intrinsic viscosity [η] (measured in decalin at 135°C) of 0.1-12dl/g.
Inventors:
Mizuno Akira
Taka Ueda
Kawasaki Masaaki
Daisuke Fukuoka
Kiso Yoshihisa
Koji Kawai
Hashimoto Mikio
Taka Ueda
Kawasaki Masaaki
Daisuke Fukuoka
Kiso Yoshihisa
Koji Kawai
Hashimoto Mikio
Application Number:
JP23009694A
Publication Date:
July 07, 2003
Filing Date:
September 26, 1994
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
International Classes:
C08F4/642; C08F210/16; (IPC1-7): C08F210/16; C08F4/642
Domestic Patent References:
| JP6100579A | ||||
| JP7138326A | ||||
| JP7149832A | ||||
| JP7149833A |
Other References:
Ｐｏｌｙｍｅｒ，１９８９年，第３０巻第７号，１３５０−１３５６頁
Attorney, Agent or Firm:
Shunichiro Suzuki
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