Patent ID: 9045590
Filing Date: 2015-06-02
Classification: C08G,C08L

Abstract:
1. A process for preparing a photoactive additive from a monohydroxybenzophenone, a dihydroxy compound, a carbonate precursor, a tertiary amine catalyst, water, and a water-immiscible organic solvent, comprising: combining the dihydroxy compound, tertiary amine catalyst, water, and water-immiscible solvent to form a reaction mixture; adding the carbonate precursor to the reaction mixture over a first time period; and adding the monohydroxybenzophenone to the reaction mixture during the first time period to obtain the photoactive additive; wherein the monohydroxybenzophenone is dissolved in a dilute aqueous sodium hydroxide solution prior to being added to the reaction mixture, wherein the solution contains from about 1 to about 2 moles of NaOH per mole of the monohydroxybenzophenone, and contains from about 5 wt % to about 20 wt % of the monohydroxybenzophenone.