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. 03, 2017
Filed:
Jun. 10, 2013
Versalis S.p.a., S. Donato Mil.se, IT;
Luca Soddu, Bologna, IT;
VERSALIS S.P.A., , IT;
Abstract
A process for the preparation of a functionalized and branched elastomeric copolymer comprising the following steps: (a) anionic copolymerization of at least one conjugated diene monomer and at least one vinyl arene, in the presence of at least one hydrocarbon solvent, of at least one lithium-based initiator, and of at least one polar modifier, obtaining a solution comprising an elastomeric copolymer; (b) reacting at least 10% by weight, preferably from 20% by weight to 100 % by weight, of the polymeric chains present in the elastomeric copolymer obtained in step (a) with at least one compound having at least one functional group selected from: epoxides, ketones, esters, aldehydes, obtaining a solution comprising a functionalized elastomeric copolymer; (c) adding a quantity of lithium-based initiator to the solution obtained in step (b), from 1 to 4 times, preferably from 1.5 to 3 times, the molar quantity of lithium-based initiator used in step (a) and a compound of bromine having general formula (I): R—Br (I) wherein R represents a linear or branched C-C, preferably C-C, alkyl group, a C-C, preferably C-C, cycloalkyl group, a C-C, preferably C-C, aryl group.