Title: Improvements in the polymerization of norbornene-type crcloolefins
Application Number: 85109124 Application Date: 1985.11.16
Publication Number: 1004206 Publication Date: 1986.08.27
Approval Pub. Date: 1990.02.14 Granted Pub. Date: 1990.02.14
International Classifi-cation: C08F4/22;C08F4/78;C08F32/08;C08G61/08
Applicant(s) Name: Hercules Incorporated Address:
Inventor(s) Name: Daniel William Klosiewicz;douglas Robert Leath
Attorney & Agent: LIU YUANJIN
Abstract:
    A method of preparing a thermoset, cross-linked polymer of a norbornene-type monomer - particularly dicyclopentadiene - is disclosed wherein a reactant stream containing a metathesis catalyst is combined with a second reactant stream containing an activator, and the combined streams are immediately injected into a mold wherein polymerization and cross-linking take place to form a shaped object. The method is characterized by a two part activator comprised of dialkylaluminum chloride or a trialkyl aluminum compound as one part and a dialkylaluminum iodide as the second part. The two part activator delays the occurrence of cross-linking, thereby allowing a somewhat longer time for transfer of the combined streams to the mold and distribution thereof throughout the mold. It also leads to more complete polymerization.
Time: 8