Methods for preparing cycloalkylidene bisphenols

US7015365B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Debjani Kapila · Bengaluru, IN
• Ramesh Krishnamurti · Williamsville, US
• Jan-Pleun Lens · Breda, NL
• Gurram Kishan · Bengaluru, IN
• Nileshkumar Prakash Kukalyekar · Echt, NL
• Jegadeesh Thampi · Bengaluru, IN
• Umesh Krishna Hasyagar · Savanuru, IN
• Vinod Kumar Rai · Bengaluru, IN
• Ashok Shyadligeri · Bengaluru, IN
• Radhakrishna Sreenivasarao Arakali · Bengaluru, IN
• Edward J. Nesakumar · Bengaluru, IN
• Pramod Kumbhar · Savanuru, IN

Key dates

• Filing date: Dec 19, 2003
• Grant date: Mar 21, 2006
• Expiry date: Jan 17, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2603/68
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for forming a cycloalkylidene bisphenol comprises: reacting a cycloalkanone compound of formula: where [A] is a substituted or an unsubstituted aromatic group, R1–R4 independently represent a hydrogen or a C1–C12 hydrocarbyl group; and “a” and “b” are integers independently having values from 0–3; with an aromatic hydroxy compound of formula [A]-OH, where [A] is as previously described; at a mole ratio of greater than or equal to about 20, in the presence of a sulfonic acid type ion exchange resin catalyst crosslinked with greater than or equal to about 8 weight percent of divinylbenzene, and a promoter selected from the group consisting of a mercaptan compound and a resorcinol compound; to form a cycloalkylidene bisphenol of formula: where [A], R1–R4, “a” and “b” are as previously described. Moreover, any acid catalyst can be used with a resorcinol promoter.