Stablized Polycarbonate Blend With Post Consumer Recycled Plastics

摘要

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.

主权项

1. 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.