Process for hydrogenating a conjugated diene polymer

Details Process for hydrogenating a conjugated diene polymer Process for hydrogenating a conjugated diene polymer

2005-10-04

2005-10-04

Lipman, Bernard (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S332800, C525S332900, C525S333100, C525S333200, C525S339000

Reexamination Certificate

active

06951906

ABSTRACT:
This invention relates to a process for selectively hydrogenating the unsaturated double bonds of conjugated diene units of a homopolymer or copolymer. By using a highly active novel homogeneous organo titanium catalyst represented by formula (I) and lithium hydride (LiH) prepared in solution of organo lithium compound and hydrogen as a reducing agent, a polymer could be hydrogenated with significantly high yield and good reproducibility. In addition, this invention is characterized by a novel method in that when a copolymer containing a conjugated diene and vinyl-substituted aromatic hydrocarbon, the unsatured double bonds of conjugated diene units are selectively hydrogenated. In said formula where, Cp is a cyclopentadienyl group (C5H5); R1and R2are the same or different and are selected from halogen atom; R3and R4are the same of different and are selected from hydrogen atoms, alkyl or alkoxy group containing 1 to 12 carbon atoms, aryl or aryloxy groups containing 6 to 20 carbon atoms and cycloalkyl groups containing 6 to 20 carbon atoms.

REFERENCES:
patent: 5242986 (1993-09-01), Gibler et al.
patent: 5814709 (1998-09-01), De Boer et al.
patent: 5886107 (1999-03-01), De Boer et al.
patent: 5925717 (1999-07-01), De Boer et al.
patent: 5994477 (1999-11-01), Ko et al.
patent: 6020439 (2000-02-01), Ko et al.
patent: 0810231 (1997-12-01), None

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