Patent ID: 6093781
Filing Date: 2000-07-25
Classification: C08F

Abstract:
A non-linear monovinyl aromatic polymer containing at least 50 weight percent of units derived from at least one monovinyl aromatic monomer having a weight average molecular weight of from 75,000 to 500,000, a melt strength of from 0.5 g at 190.degree. C. to 10.0 g at 230.degree. C., and the polymer contains monomer units having at least 1 and up to 4 branching points, characterized in that the non-linear monovinyl aromatic polymer has a comb-type form wherein the said monomer units have 3 branching points, a star-type form wherein the said monomer units have from 2 to 4 branching points, or a dendritic structure wherein the branches their selves have branched units attached to them as long as there are no more than 4 branches per monomeric unit.