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US 2021/0198482 A1Published application
Polycarbonate composition comprising pearlescent pigment and/or interference pigment
AssigneeCovestro Intellectual Property GmbH & Co. KG
InventorDerk Erich WANDNER
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Abstract
The invention relates to compositions based on aromatic polycarbonate which comprise metal oxide-coated micas as effect pigments and exhibit no significant molecular weight degradation of the polycarbonate, apparent from the MVR, under thermal stress. This is achieved by addition of small amounts of an epoxy-containing copolymer or terpolymer of styrene and acrylic acid and/or methacrylic acid in combination with a phosphite-containing thermal stabilizer.
Claims14
-13. (canceled)
A thermoplastic composition comprising
- A) 50 wt % to 98.5 wt % of aromatic polycarbonate and
- B) 0.8 wt % to ≤5.0 wt % of interference pigment and/or pearlescent pigment from the group of metal oxide-coated micas,
- C) 0.05 wt % to ≤3 wt % of an epoxy-containing copolymer or terpolymer of styrene and acrylic acid and/or methacrylic acid, and
- D) 0.001 wt % to 0.500 wt % of one or more thermal stabilizers, wherein component D comprises one or more phosphites as thermal stabilizers.
1 more element
Dependencies are inferred from the claim text.