General Electric Company

Radhakrishna Sreenivasarao Arakali

Ramesh Krishnamurti

Jan-Pleun Lens

Gurram Kishan

Edward Joseph Nesakumar

Pramod Shankar Kumbhar

Umesh Krishna Hasyagar

Vinod Kumar Rai

Jegadeesh Thampi

Ashok Shyadligeri

Nileshkumar Prakash Kukalyekar

Debjani Kapila

A process for forming a cycloalkylidene bisphenol comprises: reacting a cycloalkanone compound of formula:where [A] is a substituted or an unsubstituted aromatic group, R&#x2013;Rindependently represent a hydrogen or a C&#x2013;Chydrocarbyl group; and 'a' and 'b' are integers independently having values from 0&#x2013;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], R&#x2013;R, &#x201c;a&#x201d; and &#x201c;b&#x201d; are as previously described. Moreover, any acid catalyst can be used with a resorcinol promoter.

Methods for preparing cycloalkylidene bisphenols

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Bengaluru, India

Radhakrishna Sreenivasarao Arakali