Stablized Polycarbonate Blend With Post Consumer Recycled Plastics
AssigneeSabic Innovative Plastics IP B.V.
InventorHiromi Ishida
Life of this patent
Estimating the term…
Abstract
In various aspects, the invention relates to blended thermoplastic polymer compositions (e.g., polycarbonate or polycarbonate-polysiloxane copolymer compositions) comprising recycled acrylonitrile-butadiene-styrene (ABS) polymer or recycled polystyrene polymer which contain at least one impurity and an acid melt flow stabilizer. The presence of the acid melt flow stabilizer improves the thermal stability of the polymer blend. In various further aspects, blended compositions further comprise a flame retardant. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
Claims33
A thermoplastic polymer blend composition, comprising:
- a) from about 1 to less than about 99 parts by weight of a polycarbonate polymer component;
- b) from about 1 to less than about 50 parts by weight of at least one recycled polymer comprising one or more of a recycled acrylonitrile-butadiene-styrene (ABS) polymer, a recycled polystyrene (PS) polymer, or a combination thereof, wherein the recycled polymer comprises at least one impurity not present in an identical virgin polymer;
- and
- c) an acid melt flow stabilizer;
- wherein the thermoplastic polymer blend composition exhibits a melt flow rate measured at 260° C./2.16 kgf measured accordingly to ASTM D1238 that is lower than that of an identical reference polymer blend composition in the absence of the acid melt flow stabilizer.
A thermoplastic polymer blend composition, comprising:
- a) from about 1 to less than about 99 parts by weight of a polycarbonate polymer component;
- b) from about 1 to less than about 50 parts by weight of at least one recycled polymer comprising one or more of a recycled acrylonitrile-butadiene-styrene (ABS) polymer, a recycled polystyrene (PS) polymer, or a combination thereof, wherein the recycled polymer comprises at least one impurity selected from iron, aluminum, copper, magnesium, calcium and polyurethane particle in an amount in the range from at least about 10 ppm to about 10000 ppm;
- and
- c) an acid melt flow stabilizer.
A thermoplastic polymer blend composition, comprising:
- a) a polycarbonate polymer component;
- b) at least one recycled polymer comprising one or more of a recycled acrylonitrile-butadiene-styrene (ABS) polymer, a recycled polystyrene (PS) polymer, or a combination thereof, wherein the recycled polymer comprises at least one impurity not present in an identical virgin polymer;
- and
- c) an acid melt flow stabilizer, wherein the acid melt flow stabilizer does not comprise a carboxylic acid;
- wherein the thermoplastic polymer blend composition exhibits a melt flow rate measured at 260° C./2.16 kgf that is lower than that of an identical reference polymer blend composition in the absence of the acid melt flow stabilizer.
A method of forming a thermoplastic polymer blend composition comprising:
- combining:
- i) from about 1 to less than about 99 parts by weight of a polycarbonate polymer component;
- ii) from about 1 to less than about 50 parts by weight of at least one recycled polymer comprising one or more of a recycled acrylonitrile-butadiene-styrene (ABS) polymer, a recycled polystyrene (PS) polymer, or a combination thereof, wherein the recycled polymer comprises at least one impurity not present in an identical virgin polymer;
- and
- iii) an acid melt flow stabilizer;
- to form the thermoplastic polymer blend composition;
- wherein the formed thermoplastic polymer blend composition exhibits a melt flow rate measured at 260° C./2.16 kgf measured accordingly to ASTM D1238 that is lower than that of an identical reference polymer blend composition in the absence of the acid melt flow stabilizer.
A method of forming a thermoplastic polymer blend composition, comprising:
- combining:
- i) from about 1 to less than about 99 parts by weight of a polycarbonate polymer component;
- ii) from about 1 to less than about 50 parts by weight of at least one recycled polymer comprising one or more of a recycled acrylonitrile-butadiene-styrene (ABS) polymer, a recycled polystyrene (PS) polymer, or a combination thereof, wherein the recycled polymer comprises at least one impurity selected from iron, aluminum, copper, magnesium, calcium and polyurethane particles in an amount of at least about 10 ppm;
- and
- iii) an acid melt flow stabilizer;
- to form the thermoplastic polymer blend composition.
Dependencies are inferred from the claim text.