US 2003/0158374 A1 · Production process for ethylene oxide copolymer

Abstract

The present invention provides a production process, in which, when an ethylene oxide copolymer is obtained, conditions for obtaining this copolymer having a desirable molecular weight with ease and good reproducibility are provided. The production process for an ethylene oxide copolymer, according to the present invention, comprises the step of carrying out polymerization of a monomer mixture under stirring in a solvent, thereby obtaining the ethylene oxide copolymer, wherein the monomer mixture includes ethylene oxide and a substituted oxirane compound of a structural formula (1) as essential raw materials; with the production process being characterized in that the stirring is carried out by a stirring power of not less than 0.6 kW/m3.

Claims12

Dependent claims

A production process for an ethylene oxide copolymer, which comprises the step of carrying out polymerization of a monomer mixture under stirring in a solvent, thereby obtaining the ethylene oxide copolymer, wherein the monomer mixture includes ethylene oxide and a substituted oxirane compound of a structural formula (1) below as essential raw materials,

wherein the stirring is carried out by a stirring power of not less than 0.6 kW/m3, and
wherein the structural formula (1) is:
3
where:
R1 denotes Ra (Ra is any group having 1 to 16 carbon atoms selected from among alkyl groups, cycloalkyl groups, aryl groups, aralkyl groups, (meth)acryloyl groups, and alkenyl groups) or a —CH2—O—Re—Ra group (Re has a structure of —(CH2—CH2—O)p— (p denotes an integer of 0 to 10))).

2 more elements

Dependencies are inferred from the claim text.

Production process for ethylene oxide copolymer

Life of this patent

Production process for ethylene oxide copolymer

Life of this patent

Abstract

Claims12