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:
Sep. 22, 2009
Filed:
Mar. 30, 2007
Rajshekhar Basale, Bangalore, IN;
Hyacinth Mary Bastian, Goodwill Enclave, IN;
Balakrishnan Ganesan, Karnataka, IN;
Venkata Rama Narayanan Ganapathy Bhotla, Bangalore, IN;
Gurram Kishan, Karnataka, IN;
Pushpa Narayanan, Bangalore, IN;
Swaminathan Shubashree, Bangalore, IN;
Ravindra Vikram Singh, Utter Pradesh, IN;
Rajshekhar Basale, Bangalore, IN;
Hyacinth Mary Bastian, Goodwill Enclave, IN;
Balakrishnan Ganesan, Karnataka, IN;
Venkata Rama Narayanan Ganapathy Bhotla, Bangalore, IN;
Gurram Kishan, Karnataka, IN;
Pushpa Narayanan, Bangalore, IN;
Swaminathan Shubashree, Bangalore, IN;
Ravindra Vikram Singh, Utter Pradesh, IN;
SABIC Innovative Plastics IP BV, Bergen op Zoom, NL;
Abstract
Disclosed herein is a method comprising reacting a phenolphthalein material and a primary hydrocarbyl amine in the presence of an acid catalyst to form a reaction mixture comprising 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, wherein the phenolphthalein material comprises greater than or equal to 99 weight percent phenolphthalein, based on the total weight of the phenolphthalein material; quenching the reaction mixture and treating the quenched reaction mixture to obtain a first solid. The first solid is purified by a combination of techniques to produce a solid comprising 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine with sufficient purity to be used as a monomer in the synthesis of clear polymers.