Patent · US Expired

Production of hydrogenated nitrile rubbers

US4581417A · kind A · utility

90Cited by

1References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hartmuth Buding · Titz, DE
Heinrich Konigshofen · Bensberg, DE
Zsolt Szentivanyi · Leverkusen, DE
Joachim Thormer · Leverkusen, DE

Key dates

Filing date	Aug 8, 1984
Grant date	Apr 8, 1986
Priority date	—
Expiry date	Aug 8, 2004

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08C19/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The hydrogenation of NBR in an aromatic solvent with tris-(triphenylphosphane)-rhodium-(I) halide as catalyst under hydrogen pressures of from 20 to 350 bars and at temperatures in the range from 100.degree. to 145.degree. C. leads to products having degrees of hydrogenation of at least 90% and outstanding properties when the catalyst concentration amounts to between 0.05 and 0.6% by weight, based on solid rubber, and when hydrogenation is carried out in the presence of at most 2% by weight of triphenylphosphane.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.