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:
Nov. 23, 1999
Filed:
Feb. 05, 1997
Tadahito Nobori, Kanagawa-ken, JP;
Masahiro Kouno, Kanagawa-ken, JP;
Toshiaki Suzuki, Kyoto, JP;
Kazumi Mizutani, Kanagawa-ken, JP;
Shinji Kiyono, Kanagawa-ken, JP;
Yoshiho Sonobe, Kanagawa-ken, JP;
Usaji Takaki, Kanagawa-ken, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A salt useful as an active species in an organic reaction and represented by the following chemical formula (1): ##STR1## wherein n stands for an integer of from 1 to 8, Z.sup.n- represents an n-valent anion of an active hydrogen compound, a, b, c and d each stands for a positive integer, and Rs represent the same or different hydrocarbon groups. In addition, a simple and efficient process is provided for producing a poly(alkylene oxide) by polymerizing an alkylene oxide compound in the presence of the salt represented by the chemical formula (1).