摘要:
A polyester composition includes specific amounts of a poly(alkylene terephthalate), an impact modifier, glass fibers, and a flame retardant. The impact modifier includes a polyolefin elastomer, optionally in combination with a thermoplastic polyester elastomer. The flame retardant includes a metal dialkylphosphinate, a melamine based flame retardant, and a flame retardant synergist that can be an organophosphine oxide, an oligomeric or polymeric bis(phenoxy)phosphazene, an organophosphate ester, or a combination thereof. The composition is useful for fabricating parts for electrical and electronic devices.
摘要:
This disclosure relates to halogen-free flame retardant polycarbonate/thermoplastic polyester molding compositions with improved mechanical properties and increased polyester loading level. More particularly, the disclosure relates to halogen-free polycarbonate/ thermoplastic polyester resin alloys with polymeric phosphorus flame retardant additive and siloxane impact modifier. Also included are methods for preparing such compositions and articles there from.
摘要:
Disclosed herein is a flame retardant composition comprising 20 to 80 weight percent of a polycarbonate; 1 to 20 weight percent of a halogenated phenoxyphosphazene flame retardant, where all weight percents are based on a total weight of the flame retardant composition. Disclosed herein too is a method comprising blending a 20 to 80 weight percent of a polycarbonate; and 1 to 20 weight percent of a halogenated phenoxyphosphazene flame retardant to produce a flame retardant composition, where all weight percents are based on a total weight of the flame retardant composition.
摘要:
A polymer composition includes 15 to 60 wt%, preferably 20 to 56 wt% of a polycarbonate; 30 to 60 wt%, preferably 28 to 50 wt% of a poly(1,4-cyclohexanedimethylene terephthalate); 0.05 to 35 wt%, preferably 0.1 to 30 wt% of a poly(carbonate-siloxane); 0.5 to 18 wt%, preferably 1 to 13 wt% of a thermoplastic poly(ester-ether) copolymer, preferably comprising poly(butylene terephthalate) blocks and poly(oxyC 1 -C 4 alkylene units); and 0.5 to 8 wt% of ethylene- alkyl (meth)acrylate copolymer, wherein alkyl is a C 1 -C 4 straight chain, unsaturated hydrocarbon group; wherein the weight percentages are based on the total weight of the polymer composition. A method of manufacturing an article including the steps of melt blending the components of the polycarbonate composition is described. An article prepared by the method is also described.
摘要:
In various aspects, the disclosure relates to reinforced thermoplastic compositions exhibiting improved physical properties as well as thin wall flame resistance. The reinforced thermoplastic compositions comprise polycarbonate polymer, a filler, and a polyolefin elastomer.
摘要:
A composition includes specific amounts of an aromatic polycarbonate, a polycarbonate-polysiloxane block copolymer, a poly(alkylene terephthalate), a flame retardant, and a drip retardant. The flame retardant includes an oligomeric or polymeric bis(aryloxy)phosphazene in combination with an organophosphine oxide, an oligomeric or polymeric aromatic phosphonate, or a combination thereof. The composition is useful for fabricating parts for electrical and electronic devices.
摘要:
In an embodiment, a composition comprises, based on the total weight of the composition, 55 to 85 wt% of a polycarbonate; 10 to 25 wt% of an organopolysiloxane- polycarbonate block copolymer; 5 to 15 wt% of a phosphine oxide; and 0 to 3 wt % of an impact modifier. In another embodiment, a method of making a composition comprises extruding a mixture to form a composition comprising, based on the total weight of the composition, 55 to 85 wt% of a polycarbonate; 10 to 25 wt% of an organopolysiloxane- polycarbonate block copolymer; 5 to 15 wt% of a phosphine oxide; and 0 to 3 wt % of an impact modifier comprises extruding the polycarbonate, the organopolysiloxane- polycarbonate block copolymer, and the phosphine oxide to form the composition.
摘要:
A composition includes specific amounts of an aromatic polycarbonate, a block polycarbonate-polysiloxane, a poly(alkylene terephthalate), a block polyestercarbonate, and an organophosphate ester. Relative to a corresponding composition lacking the block polyestercarbonate, the composition exhibits improved solvent resistance while substantially maintaining impact strength, melt flow, and flame retardancy. The composition is useful for fabricating articles that may come into contact with liquid chemicals or chemical vapors.