Patent ID: 7262244

Claim:
A polymer composite comprising at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) below 30 and a polydispersity below 2.7 at least one filler and optionally at least one cross-linking agent, wherein the optionally hydrogenated, nitrile rubber polymer is prepared by reacting a nitrile polymer in the presence of one ore more compounds of the general formulas I, II, III or IV; wherein: M is Os or Ru, R and R 1 are, independently, hydrogen or a hydrocarbon selected from the group consisting of C 2 -C 20 alkenyl, C 2 -C 20 alkynyl, C 1 -C 20 alkyl, aryl, C 1 -C 20 carboxylate, C 1 -C 20 alkoxy, C 2 -C 20 alkenyloxy, C 2 -C 20 alkynyloxy, aryloxy, C 2 -C 20 alkoxycarbonyl, C 1 -C 20 alkylthio, C 1 -C 20 alkylsulfonyl and C 1 -C 20 alkylsulfinyl, X and X 1 are independently any anionic ligand, and L and L 1 are independently any neutral ligand; wherein: M 1 is Os or Ru; R 2 and R 3 are, independently, hydrogen or a hydrocarbon selected from the group consisting of C 2 -C 20 alkenyl, C 2 -C 20 alkynyl, C 1 -C 20 alkyl, aryl, C 1 -C 20 carboxylate, C 1 -C 20 alkoxy, C 2 -C 20 alkenyloxy, C 2 -C 20 alkynyloxy, aryloxy, C 2 -C 20 alkoxycarbonyl, C 1 -C 20 alkylthio, C 1 -C 20 alkylsulfonyl and C 1 -C 20 alkylsulfinyl, X 2 is an anionic ligand, and L 2 is a neutral π-bonded ligand, independent of whether it is mono- or polycyclic, L 3 is a ligand selected from the group consisting of phosphines, sulfonated phosphines, fluorinated phosphines, functionalized phosphines bearing up to three aminoalkyl-, ammoniumalkyl-, alkoxyalkyl-, alkoxylcarbonylalkyl-, hydrocycarbonylalkyl-, hydroxyalkyl- or ketoalkyl- groups, phosphites, phosphinites, phosphonites, phosphinamines, arsines, stibenes, ethers, amines, amides, imines, sulfoxides, thioethers and pyridines, Y′ is a non-coordinating anion, n is an integer in the range of from 0 to 5; wherein M 2 is Mo or W, R 4 and R 5 are, independently, hydrogen or a hydrocarbon selected from the group consisting of C 2 -C 20 alkenyl, C 2 -C 20 alkynyl, C 1 -C 20 alkyl, aryl, C 1 -C 20 carboxylate, C 1 -C 20 alkoxy, C 2 -C 20 alkenyloxy, C2-C 20 alkynyloxy, aryloxy, C 2 -C 20 alkoxycarbonyl, C 1 -C 20 alkythio, C 1 -C 20 alkylsulfonyl and C 1 -C 20 alkylsulfinyl, R 6 and R 7 are independently selected from any unsubstituted or halo-substituted alkyl, aryl, aralkyl groups or silicon-containing analogs thereof, wherein: M is Os or Ru, R and R 1 are independently selected from the group consisting of hydrogen, substituted or unsubstituted alkyl, and substituted or unsubstituted alkyl, X and X 1 are independently any anionic ligand, and L and L 1 are independently any neutral ligand.