“…Frequently, the corresponding acetoxybenzoic acids are used as reactive components upon applying p-hydroxybenzoic acid or salicylic acid as co-monomers in standard polyesters (Scheme 12), such as polyethyleneterephthalate (PET) or polybutyleneterephthalate (PBT). [91,93,97,98] p-Hydroxybenzoic acid, in particular, can be incorporated into bisphenol-A-polycarbonate by a transesterification melt procedure, [92,99] thus resulting in a polyester carbonate. Based on a polycarbonate production of over 1 million tonne per year, the fraction of fixed CO 2 might be increased to the 10 % originating from the carbonate unit.…”