Title:
ETHYLENE/$g(a)-OLEFIN/UNCONJUGATED POLYENE COPOLYMER RUBBER, RUBBER COMPOSITION FOR SEALING, MOLDED RUBBER FOR SEALING, AND PROCESS FOR PRODUCING THE MOLDED RUBBER
Document Type and Number:
WIPO Patent Application WO/2000/059962
Kind Code:
A1
Abstract:
An ethylene/$g(a)-olefin/unconjugated polyene copolymer rubber which is obtained from ethylene, a C¿3-20? $g(a)-olefin, and an unconjugated polyene and has the following properties; and a sealing rubber composition and a sealing molded rubber both containing the copolymer rubber. (i) The intrinsic viscosity [$g(h)] as measured in a 135°C decalin solvent is 1.5 to 5.0 dl/g. (ii) The value g$g(h)* or g' as defined in the description is 0.6 to 0.9. (iii) The Mw/Mn is from 3.0 to 50. (iv) The iodine value is 10 to 40. (v) The molar ratio of ethylene to the C¿3-20? $g(a)-olefin is from 40/60 to 95/5. (vi) The ratio D of T$g(a)$g(b) intensity to T$g(a)$g(a) intensity in a ?13¿C-NMR spectrum is 0.5 or lower.
Inventors:
KODA TAKU (JP)
KAWASAKI MASAAKI (JP)
KAWASAKI MASAAKI (JP)
Application Number:
PCT/JP2000/001967
Publication Date:
October 12, 2000
Filing Date:
March 29, 2000
Export Citation:
Assignee:
MITSUI CHEMICALS INC (JP)
KODA TAKU (JP)
KAWASAKI MASAAKI (JP)
KODA TAKU (JP)
KAWASAKI MASAAKI (JP)
International Classes:
C08F210/18; C09K3/10; (IPC1-7): C08F210/18; C08L23/08; C08L23/16; C08F8/34; C09K3/10
Foreign References:
| JPH08337693A | 1996-12-24 | |||
| EP0718324A2 | 1996-06-26 | |||
| EP0094051A1 | 1983-11-16 | |||
| EP0227206A1 | 1987-07-01 | |||
| EP0446382A1 | 1991-09-18 | |||
| JPH09169878A | 1997-06-30 |
Other References:
J.C. RANDALL, MACROMOLECULES, vol. 15, 1982, pages 353
J. RAY, MACROMOLECULES, vol. 10, 1977, pages 773
See also references of EP 1088836A4
J. RAY, MACROMOLECULES, vol. 10, 1977, pages 773
See also references of EP 1088836A4
Attorney, Agent or Firm:
Hiraki, Yusuke (Toranomon 1-chome Minato-ku, Tokyo, JP)
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