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:
Oct. 08, 2002
Filed:
Mar. 15, 2000
Robert Rupaner, Ellerstadt, DE;
Sven Lawrenz, Mannheim, DE;
Johannes Dobbelaar, Wachenheim, DE;
Gerhard Bauer, Weinheim, DE;
Franz-Josef Mueseler, Neustadt, DE;
Werner Kirchner, Neustadt, DE;
Bradley Ronald Morrison, Mannheim, DE;
Jürgen Nahstoll, Eisenberg, DE;
Martin Meister, Neustadt, DE;
Reinhard Bächer, Bad Dürkheim, DE;
Wolfgang Hübinger, Limburgerhof, DE;
Gerhard Schumacher, Heidelberg, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process is described for reducing the residual monomer content in a liquid solution, mixture, melt, suspension or dispersion of a polymer by postpolymerization with addition of a redox initiator system at a reaction temperature appropriate to it and with an extremely short mixing time of the liquid system in the production reactor by metering—gradually, in portions or continuously—at least one of the redox initiator components required to initiate polymerization of the residual monomers over a period (metering time) which is from about 10 to 250 times the mixing time of the liquid system in said reactor.