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:
Jun. 25, 2002
Filed:
May. 30, 2000
Satoshi Yamasaki, Aichi, JP;
Yasunori Hara, Aichi, JP;
Tamotsu Kunihiro, Aichi, JP;
Fumio Yamazaki, Aichi, JP;
Mikio Matsufuji, Aichi, JP;
Ariko Nishikawa, Aichi, JP;
Shinsuke Matsumoto, Aichi, JP;
Tsukuru Izukawa, Aichi, JP;
Masahiro Isobe, Kanagawa, JP;
Kazuhiko Ohkubo, Kanagawa, JP;
Kaoru Ueno, Kanagawa, JP;
Mitsui chemicals, Inc., , JP;
Abstract
The object is to provide a method for producing a polyoxyalkylene polyol and a method for producing a derivative thereof wherein the remaining catalyst compound is efficiently removed from a crude polyoxyalkylene polyol by a simple manner, and a method for producing a polyoxyalkylene polyol wherein a crude polyoxyalkylene polyol is produced by addition polymerization of an epoxide compound to an active hydrogen compound using as a catalyst a compound having a P═N bond, then, the crude polyoxyalkylene polyol is allowed to contact with a solid acid having a specific surface area of 450 to 1200 m /g and an average pore diameter of 40 to 100 Å to control the catalyst-remaining amount in the polyoxyalkylene polyol to 150 ppm or less, and a method for producing a derivative of the-above-described polyol are provided.