| abstract |
A weatherable block copolyester carbonate is provided. First, at least one resorcinol, alkylresorcinol or haloresorcinol is combined with at least one aromatic dicarboxylic acid dichloride, preferably isophthaloyl dichloride, terephthaloyl dichloride or a mixture thereof. The reaction is carried out to produce a hydroxy terminated polyester intermediate, which is then reacted with a carbonate precursor, preferably in the presence of a dihydroxy compound such as bisphenol A, to form a block copolymer. Polyester carbonate can be produced. This product has excellent physical properties, including a high degree of weatherability. These can be blended with other polymers such as polycarbonates, poly (alkylenecarboxylates), polyarylates, polyetherimides and addition polymers to improve their weatherability. [Selection diagram] None |