Patent ID: 7192998

Claim:
A process for producing olefin polymers, which comprises the steps of: (a) polymerizing an olefin monomer in a polymerization zone in the presence of a catalyst comprising a transition metal compound to form an olefin polymer, and (b) adding to and mixing with the olefin polymer at the end of or downstream from the polymerization zone an additive composition comprising a compound having a weight averaged molecular weight of at least 100 and containing a group R, a cation Y, an anionic group —C(R 1 ) 2 —X − bonded to group R, and optionally a group —C(R 1 ) 2 —X—H bonded to group R, wherein R 1 each occurrence independently represents hydrogen or an alkyl group having from 1 to 20 carbon atoms, X is an element selected from group 16 of the periodic table of elements, R comprises one or more units of the general formula (—(CHR 1 ),—X—), wherein R 1 is as previously defined and —X— is an ether or thioether linkage between two carbon atoms, and t is an integer from 1 to 10, which units may be the same or different, Y is selected from the group consisting of cations of metals selected from groups 1 and 2 of the Periodic Table of Elements and cations of the formula [R a 4 M] + , wherein M is an element of group 15 of the Periodic Table of Elements, and R a independently each occurrence is hydrogen or a hydrocarbyl group, C is carbon, and H is hydrogen, the additive composition having a relative mole fraction, n, of cations Y and a relative mole fraction, m, of groups of the formula —C(R 1 ) 2 —X—H, wherein 0<n1, 0≦m<1, and n+m=1.