The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2000
Filed:
Oct. 09, 1997
Vladimir A Zakharov, Novosibirsk, RU;
Gennadii D Bukatov, Novosibirsk, RU;
Sergei A Sergeev, Novosibirsk, RU;
DSM N.V., Herleen, NL;
Abstract
A method for polymerizing at least one olefin by contacting at least one olefin with a polymerization catalyst and an organometallic compound containing a metal from group 1, 2, 12 or 13 of the Periodic System of Elements under effective polymerization conditions. The polymerization catalyst is obtained by contacting metallic magnesium with an aromatic halide, RX, under conditions effective to obtain a first reaction product and solid residual products. The first reaction product is then separated from the solid residual products. A silane compound containing an alkoxy or aryloxy group is added to the first reaction product between -20.degree. C. to 20.degree. C. to obtain a precipitate which is purified to obtain a second reaction product. Subsequently, the second reaction product is contacted with a halogenized titanium compound, such as titanium tetrachloride, to obtain a further reaction product. The polymerization catalyst is obtained by purifying the further reaction product. In the aromatic halide, R represents an aromatic group containing from 6 to 20 carbon atoms and X represents a halide.