In-reactor polymer blends

摘要: 4,999.403 A 3, 1991 Datta et al. 5,504,171 A 4, 1996 Etherton et al. 5,514,761 A 5, 1996 Etherton et al. 5,786,403 A 7, 1998 Okada et al. 5,925.448 A 7/1999 Moyet al. 6,300,451 B1 10/2001 Mehta et al. 6,642,316 B1 1 1/2003 Datta et al. 6,660,809 B1 12/2003 Weng et al.This invention relates to in-reactor polymer blends compris ing at least 60 mole% of propylene and from 0.01 to 10 mole% of at least one diene selected from the group of C to C C.()-diene, norbornadiene, vinyl norbornene and mixtures thereof with the balance being ethylene. The blend comprises first and second polymers having different crystallinities and or differentTgs.