Patent ID: 6825302
Filing Date: 2004-11-30
Classification: C08F

Abstract:
A process for synthesizing a hydrogenated resin having characteristics that make it particularly useful as a tackifier resin having low odor and low color characteristics, said process comprising the steps of (1) polymerization of an unsaturated hydrocarbon monomer mixture in the presence of aluminum halide and an allylic halide to produce an unsaturated resin, wherein the unsaturated hydrocarbon monomer mixture is comprised of unsaturated hyrdocarbon monomers containing from about 4 to about 18 carbon atoms, and wherein said process is conducted in the absence of tantalum compounds; and (2) hydrogenating the unsaturated resin in the presence of a palladium on alumina catalyst system at a temperature which is within the range of about 120Â° C. to about 240Â° C. to produce the hydrogenated resin.