Polyester/polycarbonate blends having enhanced properties
AssigneeCiba Specialty Chemicals Corportation
InventorsRudolf Pfaendner, Kurt Hoffmann, Heinz Herbst
Life of this patent
Estimating the term…
Abstract
A PES/PC blend having enhanced properties as virgin material and as recyclate comprises: A) at least one metal oxide or metal salt of a fatty acid; and B) at least one phosphite and at least one sterically hindered phenol or at least one difunctional epoxy resin or a combination of both.
Claims15
A polyester/polycarbonate blend which upon thermal processing increases in molecular weight and provides enhanced mechanical properties comprising:
- a) at least metal oxide or metal salt of a fatty acid,
- b.sub.1) at least one phosphite and at least one sterically hindered phenol, and
- b.sub.2) at least one difunctional epoxy resin, containing 0.01-10 parts of component a) 0.02-5 parts of component b) and 0.01-5 parts of component b) and 0.01-5 parts of component b) per 100 parts of PES/PC blend.
A process for increasing the molecular weight and enhancing the properties of polyester/polycarbonate blends (PES/PC blends) upon thermal processing which comprises subjecting the PES/PC blends to thermal processing with the addition of:
- a) at least metal oxide or metal salt of a fatty acid,
- b.sub.1) at least one phosphite and at least one sterically hindered phenol, and
- b.sub.2) at least one difunctional epoxy resin, at a temperature above the melting point of the PES/PC blends using 0.01-10 parts of component a), 0.02-5 parts of component b) and 0.01-5 parts of component b) per 100 parts of PES/PC blend.
Dependencies are inferred from the claim text.