Method for making a dicyclopentadiene crosslinked polymer

Details Method for making a dicyclopentadiene crosslinked polymer Method for making a dicyclopentadiene crosslinked polymer

C - Chemistry, Metallurgy

08

G

402/438, 402/452

C08G 61/08 (2006.01) C08F 4/08 (2006.01) C08F 32/06 (2006.01)

Patent

CA 1258745

METHOD FOR MAKING A DICYCLOPENTADIENE CROSSLINKED POLYMER Abstract of the Disclosures Disclosed is a method of making a crosslinked poly (dicyclopentadiene) with a metathesis-catalyst system, where the metathesis-catalyst system contains an organoaluminum or organoaluminum halide activator and a pentavalent tantalum catalyst. In a preferred embodiment, the crosslinked polymer is formed by combining, in a first place, a plurality of reac- tant streams, one reactant stream which contains the activator, a second reactant stream which contains the catalyst and at least one reactant stream which contains dicyclopentadiene; then injecting the combined reactant streams into a second place, such as a mold, where polymerization occurs. Use of the pentavalent tantalum catalyst results in the formation of a crosslinked polymer having less color and greater transparency than crosslinked poly(dicyclopentadiene) made without a pentavalent tantalum catalyst.

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