Patent ID: 6184308
Filing Date: 2001-02-06
Classification: C08F,C09J

Abstract:
A hydrocarbon resin produced by the process comprising (a) providing a mixture consisting essentially of (1) about 40% to 90% by weight based on total monomers of a cyclic diolefin component comprising at least about 50% by weight dicyclopentadiene, and (2) about 60% to 10% by weight based on total monomers of at least one vinyl aromatic component having the formula ##STR3##where R.sub.1 is H or a 1-10 carbon linear or branched chain alkyl group at the meta- or para-position and R.sub.2 is a 1-10 carbon linear or branched chain alkyl group or a 2-methyl-2-phenylpropyl group, (b) thermally polymerizing the mixture, and (c) recovering a product having a Ring and Ball softening point of about 70.degree. to about 150.degree. C., having a Mz with a maximum value of about 4000, having a Mw with a maximum value of about 2500, and having a Pd with a maximum value of about 3.0, wherein the hydrocarbon resin is subsequently hydrogenated in the presence of a catalyst comprising a metal selected from the group consisting of Group VIII, IB, IIB, VIB, and VIIB of the Periodic Table.