Patent ID: 11958924
Assignee: ARLANXEO DEUTSCHLAND GMBH
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC C

Claim 0:
1. A process for preparing a solution of a hydrogenated nitrile-diene copolymer, said process comprising:
(i) providing a nitrile-diene copolymer;
(ii) providing a solvent mixture comprising: a first solvent comprising one or more members selected from the group consisting of monochlorobenzene, dichloromethane, benzene, dichlorobenzene, toluene, cyclohexane, and ketone-containing solvents of the general formula R3—CO—R4 where R3 and R4 each independently represent a linear or branched or cyclic alkyl having 1 to 20 carbon atoms; and a second solvent selected from cyclopentyl methyl ether (CPME);
(iii) dissolving the nitrile-diene copolymer according to (i) in the solvent mixture according to (ii) to form a solution; and
(iv) subjecting the solution formed in (iii) to hydrogenation to produce the hydrogenated nitrile-diene copolymer;
wherein the hydrogenation is conducted in the presence of a metathesis catalyst selected from the group consisting of Grubbs I catalyst of the structure (IV), Grubbs II catalyst of the structure (V), Zhan 1B catalyst of the structure (XV), Grela catalyst of the structure (XVI), and Grubbs-Hoveyda II catalyst of the structure (VII):,