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:
Apr. 10, 2007
Filed:
Nov. 23, 2001
Beatrice Boussand, Saint Foy les Lyons, FR;
Philippe Bonnet, Lyons, FR;
Francois Court, Fontaine l'Abbe, FR;
Michel Devic, Saint Foy les Lyons, FR;
Manuel Hidalgo, Bois-Colombes, FR;
Christophe Navarro, Bidache, FR;
Beatrice Boussand, Saint Foy les Lyons, FR;
Philippe Bonnet, Lyons, FR;
Francois Court, Fontaine l'Abbe, FR;
Michel Devic, Saint Foy les Lyons, FR;
Manuel Hidalgo, Bois-Colombes, FR;
Christophe Navarro, Bidache, FR;
Atofina, Puteaux, FR;
Abstract
Use is made, for selectively hydrogenating the olefinic double bonds of block copolymers, at least one block of which comprises olefinic double bonds, using a catalyst based on a metal from Group VIII in a medium comprising an organic solvent for the copolymer and an ionic liquid as solvent for the catalyst, of a water-immiscible ionic liquid, preferably an ionic liquid for which the anion is the hexafluorophosphate anion and the cation is the 1-butyl-3-methylimidazolium (bmim) or 1-ethyl-3-methylimidazolium (emim) cation. Applied to poly(styrene)-b-poly(butadiene)-b-poly(methyl methacrylate) block copolymers, the poly(butadiene) block of which predominantly possesses a 1,4-microstructure, this process results in copolymers for which the degree of hydrogenation is at least equal to 50% and which exhibit a melting point of greater than 30 °C.