Transition metal compound

Details Transition metal compound Transition metal compound

1980-09-24

1982-10-12

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252429B, 526122, 526137, 526138, 526119, 526351, 526901, 526906, C08F 464, C08F 1000

Patent

active

043540104

ABSTRACT:
A solid transition metal compound is ground with an organo-sulphur compound which is a defined aromatic sulphone, sulphonamide or sulphide such as diphenylsulphone, N,N-diethyl-4-phenoxy benzenesulphonamide or phenoxathiin. A Lewis Acid such as titanium tetrachloride can be present during the grinding operation. Alternatively there may be present, during the grinding, an oxidizing agent capable of generating tetravalent titanium in the presence of titanium trichloride, for example carbon tetrachloride or gaseous oxygen. The grinding can be effected in a ball-mill or a vibrating mill. The materials may be added during the grinding and the temperature may be varied during the grinding. A liquid which is a solvent for the organo-sulphur compound or complexes thereof with aluminum chloride may be present during a part of the grinding. The ground product can be used, together with an organo metallic compound such as an alkyl aluminium compound, as a catalyst for the polymerization of olefine monomers such as propylene. The catalyst may also include a Lewis Base compound. Some catalysts of this type combine high activity and high stereospecificity.

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