Phosphorus free flame retardant composition

摘要

Phosphorus free polycarbonate compositions having flame retardant properties and a desirable balance of flow, impact resistance, and heat deflection properties are disclosed.

主权项

1. A polycarbonate composition having two or more of the following:
(a) a melt volume rate of a polycarbonate component of at least about 16 cc/10 min, when measured at 260° C. and utilizing a 5 kg load; (b) a notched Izod impact value of at least about 500 J/m; or (c) a heat deflection temperature at 1.8 MPa flatwise mode of at least about 105° C.; wherein the polycarbonate composition is free of a phosphorus based additive, wherein the polycarbonate composition is free of bromine; and wherein the polycarbonate composition comprises one or more of a nitrile polycarbonate, a phthalimide copolymer, or a combination thereof; and one or more of (i) a polymethyl methacrylate grafted silicone having a siloxane content from about 50 weight % to about 75 wt % and acrylic rubber, or (ii) a polyalkylene glycol having a molecular weight (Mn) of about 2,000 g/mol; and wherein the polycarbonate composition has a flame resistance rating of V0 when measured at 1.6 mm thickness, according to UL94 standards.