Process for producing a colored molded article of metathesis polymerized polymer

Claim 1

A process for producing a molded article comprising the steps of: preparing a first reactive solution containing at least one metathesis polymerizable cycloolefin and a catalyst component of a metathesis polymerization catalyst system comprising a halide of tungsten, molybdenum, rhenium or tantalum; preparing a second reactive solution containing at least one metathesis polymerizable cycloolefin ana an activator component for said metathesis polymerization catalyst system, wherein said activator component is selected from the group consisting of tetraalkyl tins, trialkyl tin hydrides, alkylaluminum compounds and alkylaluminum halide compounds; adding at least one pigment selected from the group consisting of (a) a carbon black prepared by the incomplete combustion process, (b) a titanium oxide, (c) an iron oxide, and (d) a cobalt oxide to said second reactive solution; adding, subsequent to the addition of said pigment, a supplementary amount of said activator component to said second reactive solution to compensate for said activator component consumed when said pigment is added to said second reactive solution; combining a plurality of reactive solutions comprising at least said first reactive solution and said second reactive solution; and introducing said combined reactive solutions into a mold and metathesis polymerizing in bulk in said mold to produce said molded article.