Patent ID: 7470757

Claim:
An olefin polymerization process comprising: a) providing a chromium-based polymerization catalyst; b) contacting said catalyst with an alpha olefin in a polymerization reactor under polymerization conditions with an anti-fouling polymer having an average molecular weight greater than 1,000 daltons and having i) at least one polymer block characterized by the formula —(CH 2 —CH 2 —O) k -wherein k is within the range of 1-50; and ii) at least one polymer block characterized by the formula —(CH 2 —CH(R)—O) n -wherein R comprises an alkyl group having from 1-6 carbon atoms and n is within the range of 1-50; wherein said copolymer is terminated by end groups R′ and R″, R′ is OH or a C 1 -C 6 alkoxy group and R″ is H or a C 1 -C 6 alkyl group; and c) recovering an olefin polymer from said reaction zone.