Process for producing polybutadiene rubber

Details Process for producing polybutadiene rubber Process for producing polybutadiene rubber

1996-05-30

1997-11-11

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526119, 526137, 526139, 526142, 526143, 5261691, 5263404, C08F 480, C08F 206, C08F13606

Patent

active

056865430

ABSTRACT:
A process for producing a polybutadiene rubber having a cis-1,4 content of 94% or more, a ratio of weight average molecular weight to number average molecular weight of 2.5 to 3.5 as measured by a gel permeation chromatography and a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 20 to 100, which process comprises polymerizing 1,3-butadiene in an inert organic solvent with a catalyst comprising as the main components (a) a nickel compound; (b) a specific fluorine compound; (c) a trialkylaluminum; and (d) a halogenated aldehyde and/or a quinone compound. The use of the specific catalyst enables the production in a high yield of a polybutadiene rubber which maintains the abrasion resistance, high impact resilience and low heat buildup which are the characteristics of polybutadiene rubber and has a small die swell when extruded in the form of a blend with a natural rubber and is excellent in physical properties of vulcanizate.

REFERENCES:
patent: 3624000 (1971-11-01), Throckmorton
patent: 3684789 (1972-08-01), Yagi et al.
patent: 3732195 (1973-05-01), Throckmorton
patent: 3816567 (1974-06-01), Yagi et al.
patent: 3843618 (1974-10-01), Yagi et al.
patent: 3844974 (1974-10-01), Throckmorton
patent: 4096322 (1978-06-01), Throckmorton
Pavlos Hadjiandreou, et al., "Butadiene 1,4-Polymerization Initiated by Coordination System", Macromolecules, vol. 17, (pp. 2455-2456), 1984.
M. C. Throckmorton, "Butadiene Polymerization with Nickel Compounds: Effect of Cocatalysts", J. Appl. Poly. Sci., vol. 42, (pp. 3019-3024), 1991.
M. C. Throckmorton, et al., "An HF-Nickel-R.sub.3 AL Catalyst System for Producing High cis-1,4-Polybutadiene", Rubber Chem. Tech., vol. 45, (pp. 268-277), 1972.

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