Patent ID: 7495064
Filing Date: 2009-02-24
Classification: C08G

Abstract:
1. A method of producing a polycarbonate comprising the steps of, (i) introducing to a melt polymerization reactor system comprising a polymerization reactor operating under melt polymerization conditions, a reaction mixture comprising: an acid stabilizer and a first dihydroxy compound selected from the group consisting of catechol, resorcinol, hydroquinone, butyl hydroquinone, methyl hydroquinone, DMBPC, biphenol, o,o-biphenol, 2,2-dihydroxynaphtalene, and ortho-methyl BPA, an activated diarylcarbonate, and a polymerization catalyst system comprising a first catalyst compound having the structure: (ii) allowing the reaction mixture to polymerize thereby forming polycarbonate.