Acyl germanium compound according to general formula [R.sub.mAr(CO)].sub.4Ge and process for the preparation thereof. The compound is suitable as initiator for radical polymerization.

Acyl germanium compound according to general formula [R.sub.mAr(CO)].sub.4Ge and process for the preparation thereof. The compound is suitable as initiator for radical polymerization.

The invention relates to a rubber composition which comprises a reinforcing filler, a vulcanization system and more than 50 to 100 phr of an elastomer which contains more than 50 mol % of ethylene units and which is a copolymer of ethylene, of a first 1,3-diene which is 1,3-butadiene, isoprene or a mixture thereof, and of a second 1,3-diene of formula CH.sub.2?CRCH?CH.sub.2, the symbol R representing an unsaturated aliphatic hydrocarbon chain having 3 to 20 carbon atoms.

The invention relates to a rubber composition which comprises a reinforcing filler, a vulcanization system and more than 50 to 100 phr of an elastomer which contains more than 50 mol % of ethylene units and which is a copolymer of ethylene, of a first 1,3-diene which is 1,3-butadiene, isoprene or a mixture thereof, and of a second 1,3-diene of formula CH.sub.2?CRCH?CH.sub.2, the symbol R representing an unsaturated aliphatic hydrocarbon chain having 3 to 20 carbon atoms.

Polymerization catalyst compositions are provided as are methods of their preparation. The compositions comprise fatty amines and find advantageous use in olefin polymerization processes. The catalyst composition comprises at least one supported polymerization catalyst wherein the catalyst composition is modified with at least one fatty amine wherein the fatty amine is substantially free of particulate inorganic material.

This invention relates to catalyst compounds and the synthesis and applications useful in olefin metathesis reactions. The catalyst compounds of the invention are represented by the formula (I): wherein M is a Group 8 metal; X.sup.1 and X.sup.2 are anionic ligands; L.sup.1 and L.sup.2 are neutral two electron donor ligands. The present invention also relates to an easy applicable catalyst synthesis and the application in different olefin metathesis processes, e.g. Reaction Injection Molding (RIM), process to make -olefins from fatty acid ester, e.g. methyl oleate.

This invention relates to catalyst compounds and the synthesis and applications useful in olefin metathesis reactions. The catalyst compounds of the invention are represented by the formula (I): wherein M is a Group 8 metal; X.sup.1 and X.sup.2 are anionic ligands; L.sup.1 and L.sup.2 are neutral two electron donor ligands. The present invention also relates to an easy applicable catalyst synthesis and the application in different olefin metathesis processes, e.g. Reaction Injection Molding (RIM), process to make -olefins from fatty acid ester, e.g. methyl oleate.

Acyl germanium compound according to general formula [R.sub.mAr(CO)].sub.4Ge and process for the preparation thereof. The compound is suitable as initiator for radical polymerization.

Acyl germanium compound according to general formula [R.sub.mAr(CO)].sub.4Ge and process for the preparation thereof. The compound is suitable as initiator for radical polymerization.

This invention discloses an improved process which employs mixed alpha-olefins as feed over activated metallocene catalyst systems to provide essentially random liquid polymers particularly useful in lubricant components or as functional fluids.