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. 14, 2006
Filed:
Sep. 09, 2004
Eduard Schmid, Bonaduz, CH;
Heinz Hoff, Tamins, CH;
Ornulf Rexin, Felsburg, CH;
Ems-Chemie AG, Domat/Ems, CH;
Abstract
A catalyst solution for the anionic polymerization of lactones and/or lactams comprises a salt of at least one compound of the general formula I In this formula (I), Ris H or an aliphatic, cycloaliphatic or aromatic radical with 1 to 12 C atoms which can also have heteroatoms or hetero groups, the radical R, which is the same or different, is H, halogen, C–C-alkyl, ethoxy or wherein said solvation agent S comprises N-methylpyrrolidone, N-octylpyrrolidone, N-cyclohexylpyrrolidone, N-octylcaprolactam, tetrabutyl urea or mixtures thereof methoxy, and n=1, 2 or 3, and wherein the salt is dissolved in an aprotic solvation agent S.