Cycloolefin metathesis catalyst
AssigneeThe Goodyear Tire & Rubber Company
InventorEilert A. Ofstead
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Abstract
There is disclosed a new process for ring-opening polymerization of cycloolefins by the use of a catalyst comprising (A) tungsten or molybdenum halides, (B) alkyl aluminum halides and (C) an alcohol which may optionally contain a halogen substituent and (D) an alcohol which has a nitrile substituent. Also the catalyst is disclosed as useful in metathesis of olefins.
Claims2
A metathesis catalyst composition comprises of (A) at least one transition metal salt selected from the group consisting of tungsten halides, tungsten oxyhalides, molybdenum halides and molybdenum oxyhalides, (B) at least one compound selected from the group consisting of dialkylaluminum halides, alkylaluminum sesquihalides and alkylaluminum dihalides, (C) at least one compound of the general formula ROH wherein R is selected from the group consisting of alkyl and cycloalkyl, and wherein R contains a nitrile substituent situated on the carbon atom adjacent to that bearing the hydroxy group, and (D) a compound of the general formula ROH wherein R is selected from the group consisting of alkyl, cycloalkyl, alkoxyalkyl, haloalkyl, and aryl, and wherein the molar ratio of A:B:C:D lies within the range of 1:0.5-10:0 .5-3:0.5-1.
Dependencies are inferred from the claim text.