Disclosed herein is a flame retardant composition comprising 10 to 90 weight percent of a linear polycarbonate; a branched polycarbonate; 10 to 70 weight percent of a polysiloxane-polycarbonate copolymer; and 1 to 20 weight percent of a phosphazene compound; were all weight percents are based on the total weight of the composition. Disclosed herein too is a method comprising blending 10 to 90 weight percent of a linear polycarbonate; a branched polycarbonate; 10 to 70 weight percent of a polysiloxane-polycarbonate copolymer; and 1 to 20 weight percent of a phosphazene compound; to form a flame retardant composition; were all weight percents are based on the total weight of the composition.

Flame retardant polycarbonate compositions, methods of manufacture thereof and articles comprising the same

Disclosed herein is a flame retardant composition comprising a polycarbonate; 5 to 10 weight percent of a polysiloxane-polycarbonate copolymer; where the polysiloxane-polycarbonate copolymer comprises an amount of greater than 10 weigh percent of the polysiloxane and where the molecular weight of the polysiloxane-polycarbonate copolymer is greater than or equal to 25,000 grams per mole; 5 to 20 weight percent of a branched polycarbonate; 5 to 60 weight percent of a reinforcing filler; and 1 to 15 weight percent of a flame retarding compound. Disclosed herein too is a method comprising blending a polycarbonate; 5 to 10 weight percent of a polysiloxane-polycarbonate copolymer; 5 to 20 weight percent of a branched polycarbonate; 5 to 60 weight percent of a reinforcing filler; where the reinforcing filler is a glass fiber, a carbon fiber, a metal fiber, or a combination comprising at least one of the foregoing reinforcing fillers; and 1 to 15 weight percent of a flame retarding compound; and extruding the flame retardant composition.

In various aspects, the disclosure relates to blended polymer compositions (e.g., polycarbonate, polycarbonate-polysiloxane copolymer, polyester compositions, etc.) comprising a polycarbonate component, a polyester component, or both; optional impact modifier(s); optional flame retardant; copolymer compatibilizer; and filler. The presence of the polymer compatibilizer improves the impact performance of the polymer blend.

Impact improved filled polycarbonate or polyester compositions

The invention relates to flame-retardant, impact-modified, high-temperature-stable polycarbonate (PC)-ABS compositions and molding materials that have a high modulus of elasticity, good flowability, and high hydrolysis stability, containing: A) 55 - 95 parts by weight of aromatic polycarbonate and/or aromatic polyester carbonate, B) 1.0 - 20.0 parts by weight of rubber-modified graft polymer, C) 1.0 - 20.0 parts by weight of at least one cyclic phosphazene according to formula (X), wherein k stands for 1 or an integer number from 1 to 10, preferably for a number from 1 to 8, especially preferably 1 to 5, wherein the trimer portion (k=1) is 60 to 98 mol % with respect to component C and wherein each R is the same or different and stands for an amine group, C1 to C8 alkyl, preferably methyl, ethyl, propyl, or butyl, which is optionally halogenated, preferably halogenated with fluorine, C1 to C8 alkoxy, preferably methoxy, ethoxy, propoxy, or butoxy, C5 to C6 cycloalkyl, which is optionally substituted with alkyl, preferably with C1 to C4 alkyl, and/or with halogen, preferably chlorine and/or bromine, C6 to C20 aryloxy, preferably phenoxy or naphthyloxy, which is optionally substituted with alkyl, preferably with C1 to C4 alkyl, and/or with halogen, preferably with chlorine or bromine, and/or with hydroxy, C7 to C12 aralkyl, which is optionally substituted with alkyl, preferably with C1 to C4 alkyl, and/or with halogen, preferably with chlorine and/or bromine, preferably phenyl C1 to C4 alkyl, or a halogen group, preferably chlorine, or an OH group, D) 0 - 15 parts by weight of rubber-free vinyl (co)polymer or polyalkylene terephthalate, E) 0 - 15 parts by weight of additives, F) 0.05 - 5.0 parts by weight of anti-dripping agent, wherein all specifications of parts by weight are normalized in such a way that the sum of the parts by weight of all components A+B+C+D+E+F in the composition is 100. The invention further relates to the use of the compositions to produce molded bodies and the molded bodies produced from the compositions.

Flame-retardant polycarbonate molding materials i

An impact resistant, flame-resistant thermoplastic molding composition suitable for making thin-wall housing parts is disclosed. The composition contains A) 50 to 90 parts by weight of at least one a member selected from the group consisting of polycarbonate and polyester carbonate, B) 5 to 20 parts by weight of rubber-modified vinyl (co)polymer C) 2 to 15 parts by weight of at least one low-volatility, halogen-free flameproofing agent, D) 0.1 to 6 parts by weight of a silicate mineral, and optional E) fluorinated polyolefin, and F) conventional polymer additive wherein the total sum of the parts by weight of the components A) to F) is 100, and wherein the rubber content of the composition referred to the weight of the composition is 2 to 6 wt.-%.

Impact-resistant and flameproofed polycarbonate molding compositions

The present invention relates to moulding compositions which are treated with phosphazenes and are based on polycarbonate and graft polymers chosen from the group consisting of silicone rubbers, EP(D)M rubbers and acrylate rubbers as the graft base, and which have an excellent flameproofing and very good mechanical properties, such as resistance to stress cracking or notched impact strength.

Herbicidal mixtures exhibiting a synergistics effect

The present invention relates to flame resistant moulding compositions comprising polycarbonates and graft polymers which, in addition to good flow properties, exhibit good (notched) impact strength and high chemical resistance with a UL94V-0 classification at 1.5 mm. These moulding compositions are particularly suitable for thin-walled housing parts in the electrical and electronics sector.

Flame-retardant PC/ABS compositions having good impact strength, flowability and chemical resistance

Flame-retardant, thermoplastic molding composition comprises: (a) at least one aromatic polycarbonate (50-90 parts by weight); (b) at least one graft polymer (4-14 parts by weight); (c) at least one vinyl (co)polymer (0-15 parts by weight); (d) at least one phosphorus-containing flame retardant (1-20 parts by weight); (e) at least one rubber-free anhydride-modified alpha -olefin terpolymer (0.5-5 parts by weight); (f) at least one filler (0-25 parts by weight); and (g) other conventional additives (0-10 parts by weight), where sum of parts by weight of components (a)-(f) is 100 parts by weight. An independent claim is also included for a flame retardant polycarbonate/acrylonitrile butadiene styrene polymer blend comprising an ethylene-propylene-octene-maleic anhydride copolymer.

Flame-retardant PC/ABS compounds with good impact strength, flowability and chemical resistance

The invention relates to molding materials which are furnished with phosphazenes and which are based on polycarbonate and graft polymers selected from the group of silicone rubbers, EP(D)M rubbers, and acrylate type rubbers used as a graft base which exhibit an excellent flame protection and very good mechanical properties such as resistance to stress cracking or notch impact strength.

Flame-resistant moulding compositions comprising polycarbonate and graft polymers

The invention relates to novel cross-linked bead polymerizates with an average particle size of between 1 to 1000 µm that contain specific halogen-free phosphorus compounds. The invention further relates to a method for producing said bead polymerizates and to the use thereof as flame retardants in thermoplastics.

Dieter Wittmann

Papers

Herbicidal mixtures exhibiting a synergistics effect

Flame-retardant PC/ABS compositions having good impact strength, flowability and chemical resistance

Flame-retardant PC/ABS compounds with good impact strength, flowability and chemical resistance

Flame-resistant moulding compositions comprising polycarbonate and graft polymers

Bead polymerizates containing halogen-free phosphorus compounds