Olefin polymerization process in the presence of an...

Details Olefin polymerization process in the presence of an... Olefin polymerization process in the presence of an...

2005-02-08

2008-12-30

Teskin, Fred M (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S064000, C526S106000

Reexamination Certificate

active

07470757

ABSTRACT:
An olefin polymerisation process carried out in the presence of an anti-fouling agent and a chromium-type catalyst or Ziegler Natta catalyst; characterised in that the anti-fouling agent comprises an anti-fouling polymer having an average molecular weight (Mw) of greater than 1000 daltons and containing: (1) one or more blocks —(CH2—CH2—O)k— where each k is in the range from 1 to 50; and (2) one or more blocks —(CH2—CH(R)—(O)n−where R comprises an alkyl group having from 1 to 6 carbon atoms and each n is in the range from 1 to 50, and terminated by a R′ and a R″ end groups, wherein R′ is OH or an alkoxy having from 1 to 6 carbon atoms and R″ is H or an alkyl having from 1 to 6 carbon atoms.

REFERENCES:
patent: 3248179 (1966-04-01), Norwood
patent: 5929179 (1999-07-01), Strobbe et al.
patent: 2003/0114608 (2003-06-01), Tharappel et al.
Boulares et al., Preparation and structure of polyether-block containing polymers, Pure & Appl. Chem., vol. 70, No. 6, pp. 1239-1244, 1998.

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