Title:
CROSS-COPOLYMER AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2015/174485
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a cross-copolymer in which a residual catalyst component remains in a reduced amount and which has improved transparency, applicability to medical materials and yellowish discoloration resistance; and a method for producing the cross-copolymer. According to the present invention, a cross-copolymer is provided, wherein the cross-copolymer is produced through a coordination polymerization step of carrying out the copolymerization of an olefin monomer, an aromatic vinyl compound monomer and an aromatic polyene using a single-site coordination polymerization catalyst to synthesize an olefin-(aromatic vinyl compound)-(aromatic polyene) copolymer and a subsequent anionic polymerization step of carrying out polymerization in the co-presence of the olefin-(aromatic vinyl compound)-(aromatic polyene) copolymer and an aromatic vinyl compound monomer using an anionic polymerization initiator, said cross-copolymer being characterized in that the total mass of aluminum and lithium, which are residual catalyst components, contained in the cross-copolymer is 200 ppm or less.
Inventors:
ARAI TORU (JP)
TSUKAMOTO AYUMU (JP)
SASAKI ERI (JP)
TSUKAMOTO AYUMU (JP)
SASAKI ERI (JP)
Application Number:
PCT/JP2015/063873
Publication Date:
November 19, 2015
Filing Date:
May 14, 2015
Export Citation:
Assignee:
DENKI KAGAKU KOGYO KK (JP)
International Classes:
C08F297/02; A61L29/00; A61L31/00; C08F4/6592; C08F6/08; C08F212/00
Domestic Patent References:
| WO2013018839A1 | 2013-02-07 |
Foreign References:
| JP2013202133A | 2013-10-07 | |||
| JP2010043232A | 2010-02-25 | |||
| JP2011213843A | 2011-10-27 |
Other References:
See also references of EP 3144329A4
Attorney, Agent or Firm:
SK INTELLECTUAL PROPERTY LAW FIRM et al. (JP)
SK patent business corporation (JP)
SK patent business corporation (JP)
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