polymers made with metallocene catalysts for use in rotomolding and injection molding products

摘要

POLYMERS MADE WITH METALOCENIC CATALYZERS FOR USE IN PRODUCTS PRODUCED WITH ROTATING AND INJECTION MOLDING. The present invention relates to ethylene alphaolefin copolymers formed by contacting at least one supported metallocene catalyst, ethylene and one alpha olefin in a gas phase reactor. In some embodiments, the polymer may have: a density between 0.890 and 0.970 g / cc; a melt index between 0.7 and 200 dg / min; a melt index ratio of less than 30; an ESOR value exceeding 1000 hours; and a 1% secant modulus greater than 517 MPa (75,000 psi). In other embodiments, the polymer may have: a density between 0.930 g / cc and 0.970 g / cc; a melt index between 10 dg / min and 200 dg / min; a melt index ratio between 10 and 25; a partial weight greater than 3 g and a partial length greater than 38 cm in the spiral flow test, and; a zero shear viscosity of less than 150 Paés. Also described are the production processes of these polymers.