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:
Mar. 19, 2013
Filed:
Jan. 21, 2008
Michel Duc, Pau, FR;
Bruno Vuillemin, Lescar, FR;
Denis Bertin, Marseilles, FR;
Sylvain Marque, Marseilles, FR;
Christophe Galindo, Magny-les-Hameaux, FR;
Michel Duc, Pau, FR;
Bruno Vuillemin, Lescar, FR;
Denis Bertin, Marseilles, FR;
Sylvain Marque, Marseilles, FR;
Christophe Galindo, Magny-les-Hameaux, FR;
Total Petrochemicals France, Paris, FR;
Centre National de la Recherche Scientifique, Paris, FR;
Abstract
The present invention relates to a process for preparing a high impact monovinylaromatic polymer comprising admixing a rubber, at least one monovinylaromatic monomer and optionally one or more comonomer in the presence of at least a borane complex of the L-BHtype wherein L is a Lewis base and polymerizing the monovinylaromatic monomer. The borane complex initiator, L may be an ether (e.g THF, tetrahydrofurane), a thioether (e.g dimethylthioether) or an amine. A preferred complex is an amine borane such as by way of example triethylamine borane. The present invention also relates to a high impact monovinylaromatic polymer having a weight ratio of grafted monovinylaromatic monomer and optional comonomer to the initial monovinylaromatic monomer and optional comonomer above 0.1%, advantageously above 2% and preferably in the range 2 to 4%. The invention is of particular interest to make high impact polystyrene.