Patent · US Expired

Process for the preparation of substituted cycloalkylidene bisphenols

US5210328A · kind A · utility

11Cited by

8References

2Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Dieter Freitag · Krefeld, DE
Claus Wulff · Krefeld, DE
Alfred Eitel · Dormagen, DE
Helmut Waldmann · Leverkusen, DE
Uwe Westeppe · Mettmann, DE
Manfred Hajek · Leverkusen, DE
Klaus Berg · Krefeld, DE
Bernd Griehsel · Bottrop, DE
Carl Casser · Neunburg vorm Wald, DE

Key dates

Filing date	Jun 25, 1992
Grant date	May 11, 1993
Priority date	—
Expiry date	Jun 25, 2012

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/14
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

This invention relates to a process for the preparation of substituted cycloalkylidene bisphenols from phenols and special cycloalkanones in the presence of acid condensation catalysts and in the presence of water.

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