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. 07, 2000
Filed:
Apr. 07, 1997
Applicant:
Inventors:
Thieo E Hogen-Esch, South Pasadena, CA (US);
Dimo K Dimov, Los Angeles, CA (US);
Stephan Jungling, Mannheim, DE;
Volker Warzelhan, Weisenheim, DE;
Hermann Gausepohl, Mutterstadt, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigschafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526193 ; 526179 ;
Abstract
The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium cation containing at least one annellated aromatic ring as substituent on the phosphorous atom.