Abstract: The present invention is an improved free-radical crosslinking process and free-radical crosslinking polymer compositions. The improved process delivers hotter processing conditions, faster crosslinking, or increased crosslinked densities. The crosslinkable polymeric composition comprises (1) a free-radical crosslinkable polymer, (2) a free-radical inducing species, and (3) a crosslinking-temperature-profile modifier.

Abstract: Swellable nano-particles, such as layered nano-particles, which are treated or contacted with one or more swelling agents, such as a surfactant, improves the thermal stability of insulation shield in power cables and also permits the use of low levels of NBR and vinyl-acetate EVA copolymers in such insulation shield.

Abstract: This invention is directed to optical cable components fabricated from an extrudable blend of high crystalline polypropylene and an impact modifying polymer to provide an enhanced balance flexural modulus, Izod notched value, grease resistance, and low shrinkage properties. The polypropylene has a crystallinity of greater than weight percent and a melt flow of from 1 to 20 grams per 10 minutes at 230 degrees C. At 23 degrees C., the composition yields an extrudant having a 1-percent secant modulus of at least 1,600 MPa and a notched Izod of at least 35 J/m. The composition also yields an extruded tube having a shrinkage of less than 2.0 percent after 24 hours at 100 degrees C.

Abstract: A process for preparing a composition comprising the step of selecting a composition for preparing a moldable, test plaque having (1) a MDR ts1 at 150 degrees Celsius of at least about 20, (2) a MDR ts1 at 140 degrees Celsius of at least about 50, (3) a retention of tensile strength of at least about 75% after two weeks of aging at 150 degrees Celsius, (4) a retention of elongation of at least about 75% after two weeks of aging at 150 degrees Celsius, (5) water tree resistance less than about 45%, and (6) sweatout of less than about 100 ppm of the thiobis phenolic antioxidant and (b) imparting water tree resistance to the insulation of cables, the composition comprising (i) polyethylene, and based on 100 parts by weight of component (i), (ii) about 0.3 to about 0.