Patent ID: 7378476

Claim:
An olefin polymerization process comprising gas-phase polymerization of at least one olefin monomer in a reactor using a Ziegler-Natta or metallocene catalyst system in the presence of at least one suitable radical-generating compound in an amount sufficient for polymer modification and subsequent stabilization of such radicals before post-reactor heat processing wherein the generated radical is formed from di-tert-amylperoxide, t-butylperoxy-2-ethoxyhexylcarbonate, 2,5-dimethyl-2,5-di(t-butylperoxy)-3-hexyne, di-tert-butyl peroxide; tert-butyl cumyl peroxide; tert-amylperoxy benzoate;. tert-butylperoxy-3,5,5-trimethylhexanoate; tertbutylperoxy-2-ethylhexanoate: tert-amylperoxy-2-ethylhexanoate; a mixture of peroxydicarbonates; 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane; dicumyl peroxide; 2,2-di(tert-butylperoxy)butane; tert-amylperoxy-2-ethylhexylcarbonate; or tertbutylperoxy-2-ethylhexylcarbonate.