Title:
ANIONIC POLYMERIZATION METHOD AND METHOD FOR PRODUCING POLYMER
Document Type and Number:
WIPO Patent Application WO/2020/045212
Kind Code:
A1
Abstract:
The present invention provides: a method for more reliable anionic polymerization of a (meth)acrylic acid ester, the method enabling high living properties without sacrificing properties inherent in a (meth)acrylic polymer, such as transparency; and a method for more reliably producing a (meth)acrylic acid ester block polymer having high uniformity of molecular weight. In this method for anionic polymerization of a (meth)acrylic acid ester, a tertiary organic aluminum compound (A), an organic lithium compound (B) and at least one type of Lewis base (C) are present in a polymerization system. The tertiary organic aluminum compound (A) contains a tertiary organic aluminum compound (A1) that has a chemical structure in which two or more of the three bonds in an aluminum atom are bonded to an aromatic ring via an oxygen atom. The molar ratio (A2)/(A1) of a tertiary organic aluminum compound (A2) to the tertiary organic aluminum compound (A1) falls within the range 0-0.8%, the tertiary organic aluminum compound (A2) having a chemical structure in which one or fewer of the three bonds of an aluminum atom in the tertiary organic aluminum compound (A) is bonded to an aromatic ring via an oxygen atom.
Inventors:
KAWAHARA MOE (JP)
ONO TOMOHIRO (JP)
ONO TOMOHIRO (JP)
Application Number:
PCT/JP2019/032762
Publication Date:
March 05, 2020
Filing Date:
August 22, 2019
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
C08F2/06; C08F20/10; C08F4/12; C08F4/48; C08F4/54; C08F297/02
Domestic Patent References:
| WO2015012229A1 | 2015-01-29 |
Foreign References:
| JP2001131216A | 2001-05-15 | |||
| JP2001158805A | 2001-06-12 | |||
| JP2002088109A | 2002-03-27 | |||
| JP2009079095A | 2009-04-16 | |||
| JPH11335432A | 1999-12-07 | |||
| JP2000044631A | 2000-02-15 | |||
| JPH07330819A | 1995-12-19 | |||
| US5670592A | 1997-09-23 | |||
| JP2001131216A | 2001-05-15 |
Other References:
RODRIGUEZ-DELGADO,A. ET AL.: "Single-Site Anionic Polymerization. Monomeric Ester Enolaluminate Propagator Synthesis, Molecular Structure, and Polymerization Mechanism", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 127, 2005, pages 961 - 974, XP055695449
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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