摘要:
A fire retardant polycarbonate composition comprises branched polycarbonate resin, polytetrafluoroethylene, a fire retardant free of bromine and chlorine, and an optional siloxane.
摘要:
Improved fire-retarded properties can be imparted to polycarbonate resin composition by incorporating into the polycarbonate a fire-retardant component containing a perfluoroallkane sulfonate such as potassium perfluorobutane sulfonate and a cyclic siloxane such as octaphenylcyclotetrasiloxane. The fire-retardant component is suitably added at levels to form a polycarbonate composition in which the perfluoroalkane sulfonate is present in an amount of from 0.02 to 0.1 phr relative to the composition as a whole, and the cyclic siloxane is present in an amount of at least 0.02 relative to the composition as a whole.
摘要:
A method to reduce haze in the production of fire resistant polycarbonate compositions comprising flame retardant salts, wherein the salt is blended with a first polycarbonate to form a concentrate, and the concentrate is then added to a second polycarbonate resin.
摘要:
A thermoplastic composition comprises polycarbonate, an impact modifier having a pH of about 3 to about 7, and a flame retardant essentially free of bromine and chlorine.
摘要:
A transparent, fire resistant branched polycarbonate-polysiloxane composition comprises polycarbonate, a short-chained polydiorganosiloxane, a branching agent, and flame retardants essentially free of bromine or chlorine, wherein the amount of short-chained polydiorganosiloxane is about 1 wt. % or less.
摘要:
A fire-resistant polyestercarbonate composition comprises a polyestercarbonate polymer, a polycarbonate polymer, and a salt based flame retardant. The polyestercarbonate polymer comprises a polycarbonate unit and a polyester unit, the polyester unit derived from the reaction of isophthalic acid, terephthalic acid, and resorcinol. The composition can achieve UL94 V0 performance at 0.71 mm thickness. The composition can also maintain physical, mechanical, and processing properties with high loadings of TiO2.
摘要:
It has now been surprisingly found that addition of a phosphorous-containing oxy acid to a glass-filled polycarbonate composition substantially improves its fire retardant performance. Thus, the present invention provides a method for making a flame-retarded glass-filled polycarbonate resin comprising adding to the resin an effective flame-retardant amount of a phosphorous-containing oxy acid. Where appropriate, the melt strength of the polycarbonate is enhanced by the addition of an antidrip agent and the performance can be further enhanced by the addition of a flame retardant. Use of such a composition results in superior fire-retardant performance.