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US 12,662,571 B2Granted
Polycarbonate compositions containing polyethercarbonate polyols
AssigneeCovestro Deutschland AG
InventorsRolf Wehrmann, Anke Boumans
Life of this patent
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Abstract
Polycarbonate-based compositions containing polyether carbonate polyol are described. The compositions have an elevated transmittance in the VIS range as a result of the additive and further advantageous properties, for instance improved demolding characteristics. Even small amounts have a significant impact.
Claims19
A transparent thermoplastic composition containing
- A) aromatic polycarbonate, and
- B) polyether carbonate polyol,
- C) optionally at least one heat stabilizer and/or transesterification stabilizer,
- D) optionally at least one UV absorber, and
- E) optionally one or more further additives distinct from components B, C and D,
- wherein “transparent” means a visual transmittance Ty (D65 observed at) 10° of at least 84%, determined according to ISO 13468-2:2006 at a thickness of 4 mm, and a haze of <5%, determined according to ASTM D1003:2013 at a layer thickness of 4 mm.
3 more elements
The transparent thermoplastic composition as claimed in 7, wherein the colorants comprise an organic dye.
Dependencies are inferred from the claim text.