A method for producing a transparent article comprises the steps of melt transesterifying a monomer mixture in the presence of a transesterification catalyst to produce a hydroquinone polycarbonate copolymer product comprising greater than 45 mole percent of structural units derived from the hydroquinone....http://www.google.com/patents/US7528214?utm_source=gb-gplus-sharePatent US7528214 - Methods for preparing transparent articles from hydroquinone polycarbonate copolymers
