Special visual effect polycarbonate-polyester composition
AssigneeGeneral Electric Company
InventorBimal Ramesh Patel
Life of this patent
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Abstract
A polycarbonate/polyester resin formulation has enhanced impact resistance and comprises a polycarbonate resin, a polyester resin, flakes having a desired coloration, and a modifier selected to enhance the impact strength of the molded resin.
Claims44
A polycarbonate/polyester resin molding composition which has enhanced impact resistance consisting essentially of
- a polycarbonate resin,
- a polyester resin,
- flakes having a desired coloration, and
- a core-shell impact modifier selected to enhance the impact strength of the molded resin, wherein a concentration of said flake is about 0.3-7 wt. % based on the total of said composition, and said modifier including a rubbery core comprising a polymer derived from butadiene or n-butyl acrylate and a shell comprising a polymer derived from methacrylate alone or in combination with styrene.
A polycarbonate/polyester resin molding composition consisting essentially of, based on the total weight of the composition,
- from 10 to 90 weight percent of a polyester resin;
- from 90 to 10 weight percent of an aromatic polycarbonate resin;
- from about 5 to about 25 percent by weight of a core-shell impact modifier having a rubber core of an acrylate based rubber or a butadiene based rubber and a shell grafted on the core wherein said shell comprises a polymeric material derived from a vinylaromatic compound, a vinylcyanide compound, or an alkyl methacrylate compound;
- and
- from about 0.3 to about 7 percent by weight of metal or mineral flakes for imparting a desired visual effect, said impact modifier enhancing the impact strength of molded composition as compared to a molding composition absent said impact modifier.
A polycarbonate/polyester resin molded article having a background coloration and a visual special effect comprising a substrate consist essentially of
- from 10 to 90 weight percent of a polyester resin;
- from 90 to 10 weight percent of an aromatic polycarbonate resin;
- from about 5 to about 20 percent by weight of a core-shell impact modifier having a rubber core of an acrylate based rubber or a butadiene based rubber and a shell grafted on the core wherein said shell comprises a polymeric material derived from a vinylaromatic compound, a vinylcyanide compound, or an alkyl methacrylate compound;
- and
- from about 0.3 to about 7 percent by weight of metal or mineral flakes for imparting a desired visual effect, said impact modifier enhancing the impact strength of molded composition as compared to a molding composition absent said impact modifier.
A polycarbonate/polyester resin molding composition consisting essentially of, based on the total weight of the composition,
- from 10 to 90 weight percent of a polyester resin;
- from 90 to 10 weight percent of an aromatic polycarbonate resin;
- from about 5 to about 25 percent by weight of a core-shell impact modifier having a rubbery core comprising a polymer derived from butadiene or n-butyl acrylate and a shell comprising a polymer derived from methacrylate alone or in combination with styrene;
- and
- from about 0.3 to about 7 percent by weight of metal or mineral flakes for imparting a desired visual effect, said impact modifier enhancing the impact strength of molded composition as compared to a molding composition absent said impact modifier.
Dependencies are inferred from the claim text.