The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2005
Filed:
Jan. 03, 2003
Michiyuki Kono, Neyagawa, JP;
Manabu Kikuta, Kyotanabe, JP;
Masahito Nishiura, Nishinomiya, JP;
Fumihide Tamura, Kusatsu, JP;
Taketo Toba, Takarazuka, JP;
Shigetaka Takamiya, Himeji, JP;
Koichiro Saeki, Suita, JP;
Kazuo Takei, Suita, JP;
Toshiaki Kuriyama, Yokohama, JP;
Masashi Yukitake, Kawasaki, JP;
Michiyuki Kono, Neyagawa, JP;
Manabu Kikuta, Kyotanabe, JP;
Masahito Nishiura, Nishinomiya, JP;
Fumihide Tamura, Kusatsu, JP;
Taketo Toba, Takarazuka, JP;
Shigetaka Takamiya, Himeji, JP;
Koichiro Saeki, Suita, JP;
Kazuo Takei, Suita, JP;
Toshiaki Kuriyama, Yokohama, JP;
Masashi Yukitake, Kawasaki, JP;
Dai-ichi Kogyo Seiyaku Co., Ltd., Kyoto, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
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/m.