Process for obtaining a butadiene homopolymer in the...

Details Process for obtaining a butadiene homopolymer in the... Process for obtaining a butadiene homopolymer in the...

Filed on

2005-05-16

Date issued

2009-02-03

Examiner

Caldarola, Glenn (Department: 1797)

Patent Class

Chemistry of hydrocarbon compounds

SubClass

Unsaturated compound synthesis

SubSubClass

By addition of entire unsaturated molecules, e.g.,...

Other Related Categories

C585S532000, C526S164000, C526S340400, C502S104000, C502S117000, C502S132000

Type

Reexamination Certificate

Status

active

Patent number

07485765

Description

ABSTRACT:
A process is described for obtaining a 1,3-butadiene homopolymer by the reaction of a catalytic system in the presence of 1,3-butadiene and one or more monoolefin(s) with 4 carbon atoms. This catalytic system is based on at least:a conjugated diene monomer,an organic phosphoric acid salt of one or more rare earth metals, said salt being in suspension in at least one inert, saturated and aliphatic or alicyclic hydrocarbon solvent,an alkylating agent of the formula AlR3or HAlR2, where R is an alkyl group, andan alkylaluminum halide halogen donor.

REFERENCES:
patent: 5397851 (1995-03-01), Knauf et al.
patent: 6350833 (2002-02-01), Knauf et al.
patent: 7056998 (2006-06-01), Laubry et al.
patent: 58154705 (1983-09-01), None
patent: WO 00/69928 (2000-11-01), None
patent: WO 02/38636 (2002-05-01), None

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