Process for the (co)polymerization of ethylene

Details Process for the (co)polymerization of ethylene Process for the (co)polymerization of ethylene

2006-03-28

2006-03-28

Choi, Ling-Sui (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S348000, C526S118000, C526S124300, C526S124200, C526S123100, C502S103000, C502S115000, C502S125000, C502S127000

Reexamination Certificate

active

07019097

ABSTRACT:
A process for the (co)polymerization ethylene, optionally in mixtures with olefins CH═CHR in which R is hydrogen or a hydrocarbyl radical with 1–12 carbon atoms, carried out in the presence of a catalyst system comprising (A) a solid catalyst component which comprises Mg, halogen an electron donor selected form ethers, esters, or amines, and Ti atoms in an oxidation state such that the weight percentage ratio between Ti(red)/Ti(tot)ranges from about 0.05 to about 1; wherein Ti(red)is the weight percentage on the solid catalyst component of the Ti atoms having a valence less than 4 and Ti(tot)is the weight percentage on the solid catalyst component of all the Ti atoms and (B) an Al-alkyl compound. The said process is capable to produce ethylene polymers with a reduced oligomers content and/or improved mechanical characteristics.

REFERENCES:
patent: 4298718 (1981-11-01), Mayr et al.
patent: 4399054 (1983-08-01), Ferraris et al.
patent: 4469648 (1984-09-01), Ferraris et al.
patent: 4495338 (1985-01-01), Mayr et al.
patent: 5091353 (1992-02-01), Kioka et al.
patent: 5298474 (1994-03-01), Luciani et al.
patent: 5356848 (1994-10-01), Brusson et al.
patent: 5733987 (1998-03-01), Covezzi et al.
patent: 6071846 (2000-06-01), Kitajima et al.
patent: 6306985 (2001-10-01), Xiao et al.
patent: 0395083 (1990-10-01), None
patent: 0522651 (1993-01-01), None
patent: 0553805 (1993-08-01), None
patent: 0553806 (1993-08-01), None
patent: 0564211 (1993-10-01), None
patent: 0601525 (1994-06-01), None
patent: 0739907 (1996-10-01), None
patent: 9221706 (1992-12-01), None
patent: 9303078 (1993-02-01), None
patent: 9844009 (1998-10-01), None

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