Hydrogenated nitrile rubber compositions with improved processability
View Patent ↗The present invention relates to polymer composites containing at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50–30 at least one filler and optionally at least one cross-linking agent, a process for preparing said polymer composite wherein at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50–30, at least one filler and optionally at least one cross-linking agent are mixed and a process for the manufacture of a shaped article including the step of injection molding a polymer composite containing at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50-30, at least one filler and at least one cross-linking agent.
1. A polymer composite consisting of at least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50–30 and a polydispersity index of less than 2.7, at least one filler and optionally at least one cross-linking agent,
wherein the optionally hydrogenated, nitrile rubber polymer is prepared by a metathesis reaction in the presence of one or 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 or any neutral carbene, optionally, L and L 1 can be linked to one another to from a bidentate 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 2 –C 20 alkoxycarbonyl, C 1 –C 20 alkylthio, C 1 –C 20 alkylsulfonyl and C 1 –C 20 alkylsulfinyl,
X 2 is anionic ligand, and
L 2 is a neutral π-bonded ligand, independent of whether 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, phophinamines, 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, C 2 –C 20 alkynyloxy, aryloxy, C 2 –C 20 alkoxycarbonyl, C 1 –C 20 alkyrlthio, 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, or any neutral carbene, optionally, L and L 1 can be linked to one another to form a bidentate neutral ligand.
2. The polymer composite according to claim 1 wherein the Mooney viscosity (ML 1+4 @ 100° C.) is in the range of from 45–30.
3. The polymer composite according to claim 1 wherein the Mooney viscosity (ML 1+4 @ 100° C.) is in the range of from 40–30.
4. The polymer composite according to claim 1 , wherein the optional cross-lining agent is selected peroxide or sulfur curing system.
5. A process for preparing the polymer composite according claim 1 comprising mixing the least one, optionally hydrogenated, nitrile rubber polymer having a Mooney viscosity (ML 1+4 @ 100° C.) in the range of from 50–30 and a polydispersity index of less than 2.7, the at least one filler and optionally the at least one cross-linking agent.
6. A process for the manufacture of a shaped article comprising the step of injection molding a polymer composite according to claim 1 .
7. The process according to claim 6 , wherein the shaped article is a seal, a hose, a beating pad, a stator, a well head seal, a valve plate, a cable sheathing, a wheel roller, a belt, in place gaskets or a pipe seal.