Document Type and Number:
Japanese Patent JPH0557288
Kind Code:
B2
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.
Inventors:
KLOSIEWICZ DANIEL WILLIAM (US)
LEACH DOUGLAS ROBERT (US)
LEACH DOUGLAS ROBERT (US)
Application Number:
JP25516085A
Publication Date:
August 23, 1993
Filing Date:
November 15, 1985
Export Citation:
Assignee:
HERCULES INC
International Classes:
C08F4/00; C08F2/02; C08F4/60; C08F4/62; C08F32/00; C08F32/08; C08G61/00; C08G61/06; C08G61/08; (IPC1-7): C08G61/00