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:
Jul. 11, 2006
Filed:
Aug. 27, 2002
Giovanni Ricci, Parma, IT;
Francesco Masi, Sant' Angelo Lodigiano-Lodi, IT;
Marco Battistella, Novate Milanese, IT;
Anna Sommazzi, Santa Margherita Ligure-Genova, IT;
Maria Rivellini, Legal Representative, Novara, IT;
Sefano Santi, Legal Representative, Novara, IT;
Laura Santi, Legal Representative, Novara, IT;
Giovanni Ricci, Parma, IT;
Francesco Masi, Sant' Angelo Lodigiano-Lodi, IT;
Marco Battistella, Novate Milanese, IT;
Anna Sommazzi, Santa Margherita Ligure-Genova, IT;
Maria Rivellini, legal representative, Novara, IT;
Sefano Santi, legal representative, Novara, IT;
Laura Santi, legal representative, Novara, IT;
ENI S.p.A., Rome, IT;
Polimeri Europa S.p.A.,, Brindisi, IT;
Abstract
A description follows of random butadiene-isoprene copolymers with a trans-1,4 structure, having a butadiene/isoprene molar composition ranging from 98/2 to 32/68, the above copolymers being crystalline or amorphous depending on the isoprene content. The process for the preparation of the above copolymers is also described, in the present of a catalytic system which comprises: (a) a first component consisting of a vanadium compound selected from: (a1) compounds having general formula (Ia) VO(L)(X)wherein n is an integer from 1 to 3 and m ranges from zero to 2, n+m being equal to 2 or 3; (a2) compounds having general formula (Ib) V(L)(X)wherein p is an integer from 1 to 4, q ranges from zero to 3, the sum of p+q being equal to 3 or 4; wherein L is a bidentate ligand and X is a halogen, preferably Chlorine; (b) a second component selected from aluminoxanes and relative derivatives.