Process for the preparation of compatible thermoplastic compositions from polyesters and polycarbonates.

摘要

A process for the preparation of a thermoplastic polymeric composition, homogeneous in the molten state, starting from aromatic policarbonates and polyesters, which comprises contacting in the molten state an aromatic polycarbonate and an aromatic polyester, in the presence of a catalytic component consisting of at least one metallic salt or complex, soluble in the polycarbonate or polyester or in the mixture of the two in the molten state, selected from the group comprising: i) the soluble salts or complexes of a metal selected from lanthanium or other elements of the group of lanthanides (or rare earth metals), ii) the salts or complexes of a metal selected from the metal of groups IIA, IIIA, IVA, VA of the periodic table, or from transition metals, which metallic salts or complexes include at least one anion deriving from a carboxylic acid, or a bidentate anionic ligand; said catalytic component being added in a quantity of from 0.005 to 0.5 parts per 100 parts by weight of the mixture consisting of polyester and polycarbonate. The thermoplastic polymeric compositions obtained with said process have a good light transparency, excellent processability and stability in the molten state, high thermal resistance and resistance to solvents.