Termination of gas phase polymerizations of conjugated dienes, v

Details Termination of gas phase polymerizations of conjugated dienes, v Termination of gas phase polymerizations of conjugated dienes, v

1996-11-01

1998-03-24

Weber, Thomas R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 84, C08F 242

Patent

active

057313814

ABSTRACT:
There is provided a method for terminating a gas phase polymerization of a compound selected from the group consisting of a conjugated diene, a vinyl-substituted aromatic compound, and mixtures thereof, in a polymerization vessel in the presence of a catalyst, and optionally in the presence of an inert particulate material, comprising introducing a kill agent selected from the group consisting of an alcohol having 1 to 20 carbon atoms, an alkyl or cycloalkyl monoether, ammonia, water, an alkyl or aryl amine, and mixtures thereof.

REFERENCES:
patent: 5066736 (1991-11-01), Dumain et al.
patent: 5336738 (1994-08-01), Havas et al.
patent: 5474961 (1995-12-01), Schlund et al.
Tait, et al., The effect of 14CO contact times on active centre determinations for the polymerization of ethylene catalysed by bis(n-cyclopentadienyl)zirconium (IV) dichloride/methyl-aluminoxane, 1987, pp. 393-398.

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