초록 ▼

The invention includes a process comprising (a) forming a polymeric admixture including at least one polyolefin which has been prepared using a single site catalyst and at least a crosslinking amount of at least one poly(sulfonyl azide) crosslinking agent; (b) shaping the resulting admixture; and (c

The invention includes a process comprising (a) forming a polymeric admixture including at least one polyolefin which has been prepared using a single site catalyst and at least a crosslinking amount of at least one poly(sulfonyl azide) crosslinking agent; (b) shaping the resulting admixture; and (c) heating the resulting shaped admixture to a temperature at least the decomposition temperature of the crosslinking agent. The steps take place in any sequence and optionally include substeps. The single site catalyst is preferably a constrained geometry or metallocene catalyst, but optionally another transition metal catalyst which is not a traditional Ziegler Natta Ti/MgCl.sub.2 catalyst such as a vanadium catalyst. The invention further includes all compositions obtainable by the process of the invention as well as all articles formed from these compositions. The articles are preferably thermoformed, compression molded, injection molded, extruded, cast, blow molded, blown, profile extruded, spun, foamed or molded of any composition of the invention. The invention includes a use of any composition of the invention in any process of thermoforming, injection molding, extrusion, casting, blow molding, spinning, blowing, profile extrusion, foaming, compression molding or a combination thereof.

대표청구항 ▼

[ What is claimed is:] [1.]1. A process comprising (a) forming a polymeric admixture including at least one polyolefin having a molecular weight distribution less than about 3.5 which has been prepared using a single site catalyst and at least a crosslinking amount of at least one poly(sulfonyl azid

[ What is claimed is:] [1.]1. A process comprising (a) forming a polymeric admixture including at least one polyolefin having a molecular weight distribution less than about 3.5 which has been prepared using a single site catalyst and at least a crosslinking amount of at least one poly(sulfonyl azide) crosslinking agent; (b) shaping the resulting admixture; and (c) heating the resulting shaped admixture to a temperature at least the decomposition temperature of the crosslinking agent such that the crosslinking agent crosslinks the polymer admixture wherein the polymeric admixture crosslinked with a poly(sulfonyl azide) crosslinking agent has improved toughness and improved temperature resistance as measured by thermomechanical analysis (TMA) compared to the same polymeric admixture crosslinked with the same molar concentration of a peroxide crosslinking agent.