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. 25, 2016
Filed:
Dec. 20, 2013
Versalis S.p.a., San Donato Milanese, IT;
Francesco Masi, S. Angelo Lodigiano, IT;
Giovanni Ricci, Parma, IT;
Anna Sommazzi, S. Margherita Ligure, IT;
Giuseppe Leone, Milan, IT;
Maria Caldararo, Trecate, IT;
Versalis S.P.A., , IT;
Abstract
Process for the preparation of (co)polymers of conjugated dienes which comprises polymerizing at least one conjugated diene in the presence of a catalytic system comprising at least one bis-imino-pyridine complex of cobalt having general formula (I): wherein: Rand R, equal to or different from each other, represent a hydrogen atom; or they are selected from linear or branched C-Cpreferably C-C, alkyl groups, optionally halogenated, cycloalkyl groups optionally substituted, aryl groups optionally substituted; Rand R, different from each other, represent a hydrogen atom; or they are selected from linear or branched C-Cpreferably C-C, alkyl groups, optionally halogenated, cycloalkyl groups optionally substituted, aryl groups optionally substituted; arylalkyl groups; or Rand Rcan be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C-C, preferably C-C, alkyl groups, said cycle optionally containing other heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; or Rand R, can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C-C, preferably C-C, alkyl groups, said cycle optionally containing other heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; R, Rand R, equal to or different from each other, represent a hydrogen atom, or they are selected from linear or branched C-C, preferably C-C, alkyl groups, optionally halogenated, cycloalkyl groups optionally substituted; aryl groups optionally substituted; arylalkyl groups; or Rand R, can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C-C, preferably C-C, alkyl groups, said cycle optionally containing other heteroatoms such as, for example, oxygen, -sulfur, nitrogen, silicon, phosphorous, selenium; or Rand R, can be optionally bound to each other to form, together with the other atoms to which they are bound, a cycle containing from 3 to 6 carbon atoms, saturated, unsaturated, or aromatic, optionally substituted with linear or branched C-C, preferably C-C, alkyl groups, said cycle optionally containing other heteroatoms such as, for example, oxygen, sulfur, nitrogen, silicon, phosphorous, selenium; Xand X, equal to or different from each other, represent a halogen atom such as, for example, chlorine, bromine, iodine; or they are selected from linear or branched C-C, preferably C-C, alkyl groups, —OCORgroups or —ORgroups wherein Ris selected from linear or branched C-C/preferably C-C, alkyl groups.