Patent · US Expired

Process for converting polyaminopolyaryl-methanes into diaminodiarylmethanes

US4083870A · kind A · utility

3Cited by

1References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hans-Josef Buysch · Krefeld, DE
Peter Ziemek · Cologne, DE
Roderich Raue · Dover, US

Key dates

Filing date	Feb 12, 1974
Grant date	Apr 11, 1978
Priority date	—
Expiry date	Feb 12, 1994

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G59/5033
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polyaminopolyarylmethanes and an aromatic monoamine unsubstituted in an ortho or a para position to the amino group are heated in water to produce diaminodiarylmethanes.

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