Process for producing polybutadiene

Details Process for producing polybutadiene Process for producing polybutadiene

1997-06-25

1999-05-18

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 92, 526 93, 526138, 526153, 5263404, C08F4/80;136/00

Patent

active

059051256

ABSTRACT:
A high cis-1,4-polybutadiene is produced, with reduced gel formation, by preparing a catalyst from (A) a cobalt compound, (B) a trialkyl (C.sub.1-10) aluminum compound, (C) a halide compound selected from those of formulae (1) and (2): (1) AlR.sup.2.sub.m X.sub.3-m, and (2) R.sup.3 --X, wherein R.sup.2 =C.sub.1-10 hydrocarbon, X=halogen, m=0 to 2, R.sup.3 =C.sub.1-40 hydrocarbon, and (D) water in an amount of 0.77 to 1.45 moles per mole of total Al in components (B) and (C); and polymerizing 1,3-butadiene in the presence of the resultant catalyst in a polymerization medium including an alkane, cycloalkane and/or olefin hydrocarbon.

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Ricci, et al. "Polymerization of Conjugated Dialkenes with Transition Metal Catalysts; Influence of Methylaluminoxane on Catalyst Activity and Stereospecificity," Polymer Communications, vol. 32, No. 17 (1991), pp. 514-517.

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