Title:
ETHYLENE/α-OLEFIN/5-VINYL-2-NORBORNENE COPOLYMER, COMPOSITION CONTAINING SAID COPOLYMER, AND CROSSLINKED BODY
Document Type and Number:
WIPO Patent Application WO/2023/182473
Kind Code:
A1
Abstract:
[Problem] The purpose of the present invention is to obtain an ethylene/α-olefin/non-conjugated polyene copolymer which can be applied to LIM molding or other wide range of molding methods, and is suitable for achievement of a molded body that has excellent mechanical strength. [Solution] The present invention relates to an ethylene/α-olefin/5-vinyl-2-norbornene copolymer which is characterized by satisfying the requirements (i) to (vi) described below. (i) The weight average molecular weight is within the range of 1,000 to 50,000. (ii) The molecular weight distribution (Mw/Mn, Mw: weight average molecular weight, Mn: number average molecular weight) as determined by gel permeation chromatography (GPC) is 2.7 or less. (iii) The intensity ratio Tαβ/Tαα of 13C-NMR spectrum is 0.0 to 0.1. (iv) The content of a constituent unit derived from 5-vinyl-2-norbornene is within the range of 0.1% by mass to 20.0% by mass. (v) The constituent unit derived from 5-vinyl-2-norbornene comprises an endo structure and an exo structure; and the (endo structure)/(exo structure) ratio is 2.5 or less. (vi) The limiting viscosity (η) as measured in decahydronaphthalene at 135°C is within the range of 0.01 dl/g to 0.8 dl/g.
Inventors:
ICHINO KOTARO (JP)
ARINO MITSUNAO (JP)
ARINO MITSUNAO (JP)
Application Number:
PCT/JP2023/011699
Publication Date:
September 28, 2023
Filing Date:
March 24, 2023
Export Citation:
Assignee:
MITSUI CHEMICALS INC (JP)
International Classes:
C08F210/18; C08F4/6592; C08L23/08; C08L23/16
Domestic Patent References:
| WO2015122415A1 | 2015-08-20 |
Foreign References:
| JPS62121711A | 1987-06-03 | |||
| JPH07196717A | 1995-08-01 | |||
| JP2019167403A | 2019-10-03 | |||
| JP2011001497A | 2011-01-06 | |||
| JP2006299065A | 2006-11-02 |
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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