Patent ID: 6060567
Filing Date: 2000-05-09
Classification: B29C,B29K,B32B,C08F,C08G,C08J,C08L,Y10S

Abstract:
An interpolymer formed by a continuous process of preparing a substantially linear interpolymer of ethylene and at least one C.sub.3 -C.sub.20 alpha-olefin, said interpolymer having long chain branching, a critical shear rate at onset of gross melt fracture greater than 4.times.10.sup.6 dyne/cm.sup.2, a melt flow ratio, I.sub.10 /I.sub.2 .gtoreq.5.63, and a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation:M.sub.w /M.sub.n .ltoreq.(I.sub.10 /I.sub.2)-4.63,said process comprising continuously contacting ethylene and said at least one C.sub.3 -C.sub.20 alpha-olefin with a catalyst composition under continuous polymerization conditions and removing the interpolymer having long chain branches via a reactor exit stream, wherein said catalyst composition is made from components comprising:a) a metal coordination complex corresponding to the formula: ##STR8## wherein R' each occurrence is independently selected from the group consisting of hydrogen, alkyl, aryl, silyl, germyl, cyano, halo and combinations thereof having up to 20 non-hydrogen atoms;X each occurrence independently is selected from the group consisting of hydride, halo, alkyl, aryl, silyl, germyl, arloxy, alkoxy, amide, siloxy, neutral Lewis base ligands and combinations thereof having up to 20 non-hydrogen atoms,Y is --O--, --S--, --NR*--, --PR*--, or neutral two electron donor ligand selected from the group consisting of OR*, SR*, NR*.sub.2, and PR*.sub.2 ;M is a metal of group 3-10. or the Lanthanide series of the Periodic Table of the Elements; andZ is SiR*.sub.2, CR*.sub.2, SiR*.sub.2 SiR*.sub.2, CR*.sub.2 CR*.sub.2, CR*.dbd.CR*, CR*.sub.2 SiR*.sub.2, GeR*.sub.2, BR*, BR*.sub.2 ;wherein:R* each occurrence is independently selected from the group consisting of hydrogen, alkyl, aryl, silyl, halogenated aryl, halogenated alkyl groups having up to 20 non-hydrogen atoms, and mixtures thereof, or two or more R* groups from Y, Z, or both Y and Z form a fused ring system; andn is 1 or 2, andb) an activating cocatalystwherein the M.sub.w /M.sub.n is less than 3.5.