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US 4,729,976 AGranted
Polymer of dicyclopentadiene and a process for preparation
AssigneeShell Oil Company
InventorsWillem Sjardijn, Arris H. Kramer
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Abstract
The invention is a process for preparing a polymer which comprises contacting dicyclopentadiene with a catalyst comprising a phenolic substituted tungsten halide and a trialkyltin hydride or triphenyltin hydride and recovering said polymer. The invention is also a polymer of dicyclopentadiene as prepared in the process of the invention and a catalyst used in the process of the invention to prepare said polymer.
Claims8
A catalyst composition for the preparation of a polymer of dicyclopentadiene which comprises
- (a) a tungsten compound having the formula ##STR7## wherein R.sup.2 is a bulky alkyl group having at least 3 carbon atoms and R.sup.3 is selected from the group consisting of an hydrogen atom and a bulky alkyl group having at least 3 carbon atoms, R.sup.1 is selected from the group consisting of an hydrogen atom and an alkyl group of 1 to 10 carbon atoms, (m+n) is equal to 6 and n is 1 or 2, and
- (b) a tin compound having the formula ##STR8## wherein R.sup.4 is selected from the group consisting of a phenyl group, and an alkyl group having 1 to 10 carbon atoms.
Dependencies are inferred from the claim text.