COPOLYMER AND METHOD FOR PRODUCING SAME, COPOLYMER MIXTURE, DOPE RESIN COMPOSITION, AND RESIN MOLDED BODY AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2021/033768

A1

The present invention discloses a method for producing a copolymer which contains a constituent unit derived from α-methylenelactone and a constituent unit derived from an alkyl (meth)acrylate that has an alkyl group having from 1 to 6 carbon atoms. This method for producing a copolymer comprises a step for polymerizing monomers containing α-methylenelactone and an alkyl (meth)acrylate in the presence of a solvent. The solvent satisfies either the condition (A) (at least one solvent selected from the group consisting of cyclic amides and cyclic esters) or the condition (B) (a mixed solvent which is composed of a first solvent having a boiling point of less than 100°C and a second solvent having a boiling point of 100°C or more, wherein: the first solvent is at least one substance selected from the group consisting of ketones and alkyl chlorides; the second solvent is at least one substance selected from the group consisting of cyclic ketones, cyclic esters, amides and sulfoxides; and the mixed solvent has a boiling point of from 70°C to 120°C).

IMOTO SHIN-YA (JP)
KITAMURA TOMOAKI (JP)
TAKARAGI KENSUKE (JP)
NAKANISHI HIDETAKA (JP)

PCT/JP2020/031644

February 25, 2021

August 21, 2020

Click for automatic bibliography generation  

NIPPON CATALYTIC CHEM IND (JP)

C08F20/18; C08F220/12; C08F220/18; C08F224/00; C08J5/18; C08L33/04

JPH0912645A	1997-01-14
JP2009041007A	2009-02-26
JP2009517538A	2009-04-30
JP2011046805A	2011-03-10
JPH08231648A	1996-09-10
JP2009227787A	2009-10-08
JP2010179640A	2010-08-19

HASEGAWA Yoshiki et al. (JP)

View/Download PDF      PDF Help

Previous Patent: MEDICAL INSTRUMENT AND MANUFACTURING METHOD THEREFOR

Next Patent: MEDICAL INSTRUMENT AND METHOD FOR MANUFACTURING SAME