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:
Jan. 08, 2008
Filed:
Jun. 26, 2002
Mathias Destarac, Paris, FR;
Wojciech Bzducha, Courbevoie, FR;
Mathias Destarac, Paris, FR;
Wojciech Bzducha, Courbevoie, FR;
Rhodia Chimie, Aubervilliers, FR;
Abstract
The invention concerns a method for preparing polymers by free radical polymerisation comprising (i) preparing a mini-emulsion containing: at least an ethylenically unsaturated monomer, at least a control agent selected among xanthates, dithio-carbamates, thioether-thiones, the xanthates comprising phosphorus and optionally fluorine and dithiophosphoroesters, an aqueous solution, a surfactant, and a co-surfacant, and (ii) reacting said mini-emulsion, in the presence of a free radical source, at a sufficient temperature and/or for a sufficient time interval to form the polymers.