HYDROGENATED NITRILE RUBBER CONTAINING PHOSPHINE OXIDE OR DIPHOSPHINE OXIDE

摘要

Novel hydrogenated nitrile rubbers are provided, which, as well as having reduced contents of phosphines and/or diphosphines, include phosphine oxides and a specific content of halogens, and which enable access to vulcanizable mixtures and corresponding vulcanizates that possess improved moduli and compression set values and good values for heat buildup under dynamic stress. These novel hydrogenated nitrile rubbers are obtained by a specific production process, in the course of which the hydrogenated nitrile rubbers are reacted with at least one specific oxidizing agent.

主权项

1. Hydrogenated nitrile rubber comprising:
i) 0 to 1.0 wt % of phosphines, diphosphines or mixtures thereof, based on the hydrogenated nitrile rubber, ii) 0.25 to 6 wt % of phosphine oxides, diphosphine oxides or mixtures thereof, based on the hydrogenated nitrile rubber, and iii) 25 to 10000 ppm total halogen.