Patent ID: 7329720
Filing Date: 2008-02-12
Classification: C07D

Abstract:
1. A method for increasing a mean particle size of a 2-hydrocarbyl-3,3-bis(hydroxyaryl)phthalimidine, the method comprising: forming a mixture of a 2-hydrocarbyl-3,3-bis(hydroxyaryl)phthalimidine having a mean particle size less than 2 microns and a solvent composition comprising an organic solvent and water, wherein the solvent composition is capable of at least partially dissolving the 2-hydrocarbyl-3,3-bis(hydroxyaryl)phthalimidine; forming an adduct of the 2-hydrocarbyl-3,3-bis(hydroxyaryl)phthalimidine; and heating the mixture at a temperature and for a time effective to decompose the adduct to form a 2-hydrocarbyl-3,3-bis(hydroxyaryl)phthalimidine product having a mean particle size greater than 5 microns.