Selective hydrogenation of conjugated diolefin polymers

Details Selective hydrogenation of conjugated diolefin polymers Selective hydrogenation of conjugated diolefin polymers

1990-08-15

1992-08-25

Lipman, Bernard

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

Synthetic resins

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

5253328, 5253329, 5253331, 5253332, 525339, C08F 804

Patent

active

051419971

ABSTRACT:
This invention provides a catalyst and a process for the hydrogenation of conjugated diolefin polymers which first involves the polymerization or copolymerization of such monomers with an organo alkali metal polymerization initiator in a suitable solvent thereby creating a living polymer. The living polymer is preferably terminated by the addition of hydrogen. Finally, selective hydrogenation of the unsaturated double bonds in the conjugated diolefin units of the terminated polymer is carried out in the presence of at least one bis(cyclopentadienyl)titanium (+3) compound of the formula:

REFERENCES:
patent: 2449949 (1944-09-01), Morris et al.
patent: 3113986 (1963-12-01), Breslow et al.
patent: 3472829 (1969-10-01), Claybaugh et al.
patent: 3475399 (1969-10-01), Peters et al.
patent: 3525729 (1970-08-01), Gaeth
patent: 3541064 (1970-11-01), Yoshimoto et al.
patent: 3580897 (1971-05-01), Yoshimoto et al.
patent: 3720654 (1973-03-01), Olechowski
patent: 3937759 (1976-02-01), Baumgartner et al.
patent: 4014859 (1977-03-01), Cooper et al.
patent: 4156673 (1979-05-01), Eckert
patent: 4340703 (1982-07-01), Freppel
patent: 4501857 (1985-02-01), Kishimoto et al.
patent: 4547555 (1985-10-01), Cook et al.
patent: 4629767 (1986-12-01), Shyr et al.
patent: 4673714 (1987-06-01), Kishimoto et al.
Ziegler-Natta Catalysts and Polymerizations, John Boor, Jr., published by Academic Press in 1979.
Journal of Organo Metallic Chemistry, Feb. 6, 1990, vol. 382, Nos. 1 and 2, pp. 69-76.

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