The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 2006
Filed:
Dec. 19, 2003
Debjani Kapila, Bangalore, IN;
Ramesh Krishnamurti, Bangalore, IN;
Jan-pleun Lens, Breda, NL;
Gurram Kishan, Bangalore, IN;
Nileshkumar Kukalyekar, Sangli, IN;
Jegadeesh Thampi, Bangalore, IN;
Umesh Krishna Hasyagar, Bangalore, IN;
Vinod Kumar Rai, Bangalore, IN;
Ashok S. Shyadligeri, Bangalore, IN;
Radhakrishna Sreenivasarao Arakali, Bangalore, IN;
Edward J. Nesakumar, Bangalore, IN;
Pramod Kumbhar, Bangalore, IN;
Debjani Kapila, Bangalore, IN;
Ramesh Krishnamurti, Bangalore, IN;
Jan-Pleun Lens, Breda, NL;
Gurram Kishan, Bangalore, IN;
Nileshkumar Kukalyekar, Sangli, IN;
Jegadeesh Thampi, Bangalore, IN;
Umesh Krishna Hasyagar, Bangalore, IN;
Vinod Kumar Rai, Bangalore, IN;
Ashok S. Shyadligeri, Bangalore, IN;
Radhakrishna Sreenivasarao Arakali, Bangalore, IN;
Edward J. Nesakumar, Bangalore, IN;
Pramod Kumbhar, Bangalore, IN;
General Electric Company, Schenectady, NY (US);
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, R–Rindependently represent a hydrogen or a C–Chydrocarbyl 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], R–R, “a” and “b” are as previously described. Moreover, any acid catalyst can be used with a resorcinol promoter.