Abstract: A thermoplastic composition, contains a polycarbonate resin, a polycarbonate-polysiloxane copolymer, an aromatic vinyl copolymer, an impact modifier, and a mineral filler, wherein the composition has least about 40% ductility under multiaxial impact strength test conditions per ASTM D3763 at ?30° C. Alternatively, a composition contains a polycarbonate resin, a polycarbonate-polysiloxane copolymer in an amount sufficient to provide at least about 2.5 wt. % siloxane by weight of the composition, an aromatic vinyl copolymer comprising SAN, an impact modifier comprising ABS, and a mineral filler. Such compositions may be made by combining, by weight of the composition, polycarbonate resin, a polycarbonate-polysiloxane copolymer, an aromatic vinyl copolymer, an impact modifier, and a mineral filler, wherein the composition has at least 40% ductility under multiaxial impact strength test conditions per ASTM D3763 at ?30° C.

Abstract: The present invention relates to low-viscosity oligocarbonate polyols, their preparation and use. The oligocarbonate polyols are based on diols of formula I below, which are used in combination with a further aliphatic polyol.

Abstract: A polyesterified block copolymer represented by the general formula (1), (2) or (3) (for example, polyolefin/polyolefin block copolymer of the following general formula (1)), obtained by an esterification reaction between a terminal maleated polymer and a terminal hydroxylated polymer. Also, a process for producing the same is provided. (1) wherein each of R1 and R2 represents hydrogen or methyl; m is an integer of 10 to 200; n is an integer 10 to 200; k is an integer 5 of to 3000.

Abstract: The invention relates to a flame retardant polycarbonate composition which is comprised of a polycarbonate, a phosphoric acid ester, a functionalized acrylic polymer, and an alkyl methacrylate-diene-vinyl aromatic terpolymer, wherein the polycarbonate is present in the composition in an amount of at least about 85 weight percent, wherein the phosphoric acid ester is present at a level which is within the range of about 1 weight percent to about 12 weight percent, wherein the functionalized acrylic polymer is present at a level which is within the range of about 0.5 weight percent to about 4.5 weight percent, and wherein the alkyl methacrylate-diene-vinyl aromatic terpolymer is present at a level which is within the range of about 0.5 weight percent to about 4.5 weight percent, with the proviso that the sum of the amount of the functionalized acrylic polymer and the alkyl methacrylate-diene-vinyl aromatic terpolymer present in the composition does not total more than 5 weight percent.

Abstract: An aromatic carbonate polymer composition having improved thermal stability consisting of an aromatic carbonate polymer such as a polycarbonate or polycarbonate/polyester blend and an impact modifier which is free of alkali materials which catalytically degrade a polycarbonate. Also an impact modifier which is preferably of a shell-core structure prepared by the emulsion polymerization process and has a pH of about 3 to about 8. A preferred emulsifier is an alkyl sulfonate having an alkyl group of C6-C18 carbons.

Abstract: The present invention is a polycarbonate resin composition containing a polycarbonate resin and comprising at least two resins contained as components, wherein the intensity ratio of the absorption peak appearing in a range of 2933±5 cm?1 to the absorption peak appearing in a range of 2965±5 cm?1 is 0.43 or more. The polymer alloy of this invention can be used to obtain a material with excellent impact resistance.

Abstract: A thermoplastic molding composition containing polycarbonate, polyalkylene terephthalate and an elastomeric impact modifier is disclosed. The impact modifier that exhibits pH value of less than 7 and contains less than 500 ppm of sodium ions, is characterized in its core/shell morphology, where the core contains polymerized butadiene structural units and shell contains polymerized methacrylate structural units. The core is present in an amount of 40 to 70 percent relative to the weight of the impact modifier, and the glass transition temperature of the shell is greater than 23° C. The composition is characterized in its improved surface quality and toughness at low temperatures.

Abstract: This invention relates to a blend of biodegradable polymers comprising: (A) about 5% to about 95% by weight of at least one flexible biodegradable polymer (A) having a glass transition less than about 0° C., (B) about 5% to about 95% by weight of at least one rigid biodegradable polymer (B) having a glass transition greater than about 10° C., and (C) about 0.25 to about 10 weight % of at least one compatibilizer (C), said percentages being based on the total weight of the polymer blend; where the polymer blend has a higher zero shear melt viscosity than polymers (A) and (B) separately.

Abstract: A continuous process for the production of an elastomer-modified thermoplastic is disclosed. The process entails (i) obtaining graft elastomer (D) having residual moisture content of 1 to 50 wt. %, particularly 5 to 50 wt. %, particularly preferably 10 to 40 wt. %, (ii) introducing (D) and thermoplastic resin (B) through an inlet to a reactor operating under conditions calculated to melt (D) and (B) and to remove organic volatile components C) to produce a molten blend, the reactor being equipped with a plurality of kneading bars, that convey a portion of the molten blend towards the reactor inlet.

Abstract: A polymer blend consisting essentially of at least one thermoplastic polymer, and a polymer comprising structural units derived from a 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine is disclosed.

Abstract: A thermoplastic composition, comprising: about 10 to about 84 wt. % of a polycarbonate resin; about 0.5 to about 40 wt. % of a polycarbonate-polysiloxane copolymer; 1 to about 40 wt. % of an impact modifier composition; and about 1 to about 50 wt. % of an alkyl (meth)acrylate polymer; each based on the total combined weight of the thermoplastic composition, exclusive of any filler. In another embodiment, the thermoplastic composition may comprise about 10 to about 85 wt. % of a polycarbonate resin; about 1 to about 40 wt. % of an impact modifier composition; and about 1 to about 50 wt. % of an impact-modified alkyl (meth)acrylate polymer; each based on the total combined weight of the thermoplastic composition, exclusive of any filler. The compositions have improved weld line strength, and are useful in the manufacture of molded parts, especially for electronic devices.

Abstract: A thermoplastic composition contains a polycarbonate resin, an aromatic vinyl copolymer, an impact modifier and a mineral filler, wherein the composition has a lightness L* of greater than or equal to about 70 under one or more of CIE D65, CWF-2 or C illumination using a 2° observer at 360 to 750 nanometers (nm), including specular components. Alternatively, a thermoplastic composition may contain a polycarbonate resin, a vinyl aromatic copolymer, an impact modifier and a mineral filler, and less than or equal to about 400 parts per million iron, by weight of the composition. An article may be formed by molding, extruding, shaping or forming such a composition to form the article.

Abstract: The present invention is directed a golf ball that uses impact modified non-ionic engineered thermoplastic polycarbonate/polyester copolymer or blend, for example polycarbonate/poly(butylene terephthalate) (PC/PBT) impact modified by blending with functionalized thermoplastic block co-polymers like maleic anhydride grafted styrene-butadiene-styrene and its hydrogenated derivatives. The impact modified thermoplastic polycarbonate/polyester are used as intermediate layers to produce golf balls having lower flexural modulus and improved durability.

Abstract: The present invention relates to a thermoplastic resin composition and a preparation method of the same, more precisely, a thermoplastic resin composition containing acrylate-styrene-acrylonitrile (ASA) graft copolymer resin, aromatic polycarbonate resin, aromatic vinyl compound and vinyl cyan compound copolymer resin and styrene-acrylonitrile graft maleic anhydride (SAN-g-MAN) to improve exterior physical properties such as scratch resistance, surface gloss, colorability, weather resistance, etc, and a preparation method of the same.

Abstract: Disclosed is a thermoplastic composition comprising a polycarbonate terpolymer comprising structures derived from structures (I), (TI) and (III), wherein (I) is a dihydroxy compound having the structure (A): wherein n is 0 to 4 and Rf is independently a halogen atom, a C1-10 hydrocarbon group, or a C1-10 halogen substituted hydrocarbon group; (II) comprises a second dihydroxy compound derived from Formula (A) and different from (I) and wherein n and Rf are as previously defined; and (III) a third dihydroxy compound not derived from Formula (A), wherein the sum of the mol percent of all of structures (I) and (II) is greater than 45% relative to the sum of the molar amounts of all of structures (I), (II) and (III) in the polycarbonate terpolymer and wherein said polycarbonate terpolymer is amorphous; an impact modifier; and an ungrafted rigid copolymer. The thermoplastic composition has improved chemical resistance and scratch resistance.

Abstract: A thermoplastic polycarbonate composition is disclosed, in various embodiments, having enhanced low-temperature ductility, UV resistance and/or fire-retardance characteristics. The composition comprises a polycarbonate, and a combination of an elastomer-modified graft copolymer and a polysiloxane-polycarbonate copolymer. The polycarbonate composition is useful for manufacture of electronic and mechanical parts, among others.

Abstract: A composition formed from (a) a polyester and polycarbonate blend; (b) an organopolysiloxane-polycarbonate block copolymer; (c) an acrylic core shell impact modifier; (d) titanium dioxide and (e) a flame retarding amount of a halogenated flame retardant has properties useful as a weatherable molding composition. It can suitably be used in articles such as encloses for electronic equipment such as communication devices.

Abstract: A high-reactivity liquid polyurethane composition which contains at least one uretdione group and cures at a low baking temperature can be used for producing plastics, particularly surface coatings and adhesives. The polyurethane composition contains A) at least one curing agent which contains at least one uretdione group and is obtained from i) an aliphatic polyisocyanate, a (cyclo)aliphatic polyisocyanate, a cycloaliphatic polyisocyanate or mixtures thereof, and ii) at least one hydroxyl-containing compound, the curing agent having a free NCO content of less than 5% by weight and a uretdione content of from 1 to 18% by weight; and B) at least one catalyst.

Abstract: Disclosed is an improved weatherable thermoplastic composition. The composition is comprised of a copolymer of an alkyl acrylate or alkyl methacrylate and (methyl)methacrylate and a multi-stage, sequentially-polymerized impact modifier polymer. The copolymer is characterized by greater than 15 weight percent alkyl acrylate content. The multi-stage, sequentially-polymerized impact modifier is characterized by an elastomer stage, which is 55 percent by weight or greater of the impact modifier composition and is minimally crosslinked. The thermoplastic composition can be used in a wide range of film, sheet, or molded applications.

Abstract: A flame resistant, impact-modified polycarbonate composition is disclosed. The composition that is suitable especially for preparing thermoformed articles comprises branched aromatic polycarbonate and/or branched aromatic polyester carbonate, a graft polymer containing silicone rubber or silicone acrylate rubber, talc, and a phosphorus-containing flameproofing agent, and meets high requirements in terms of fireproofing. Also disclosed is a process for the preparation of the composition and its use in the production of molded articles.

Abstract: Thermoplastic molding composition comprising components A, B, C and D and, if appropriate, E, F, G and H, A) from 1 to 97.5% by weight of at least one aromatic polycarbonate A, B) from 1 to 97.5% by weight of at least one graft polymer B made from b1) from 40 to 80% by weight of a graft base made from an elastomeric polymer B1, b2) from 20 to 60% by weight of a graft B2 made from b21) from 60 to 95% by weight of styrene or of substituted styrenes B21 and b22) from 5 to 40% by weight of at least one unsaturated nitrile B22, C) from 1 to 97.5% by weight of at least one thermoplastic copolymer C made from c1) from 60 to 85% by weight of styrene or of substituted styrenes C1 or mixtures thereof and c2) from 15 to 40% by weight of at least one unsaturated nitrile C2, D) from 0.

Abstract: The present invention relates to miscible blends of the polycarbonate of bisphenol A and polyesters from aromatic dicarboxylic acids, 1,4-cyclohexanedimethanol, ethylene glycol, and 2,2?-(sulfonylbis(4,1-phenyleneoxy)-bis(ethanol).

Abstract: Disclosed are polymer compositions comprising: (A) a first component comprising about 1 to 99 percent by weight at least one polyester (A) comprising: (1) diacid residues selected from the group consisting of terephthalic acid residues, isophthalic acid residues and mixtures thereof, and (2) diol residues selected from the group consisting of 1,4 -cyclohexanedimethanol residues, ethylene glycol residues and mixtures thereof; wherein the molar ratio of 1,4-cyclohexanedimethanol to ethylene glycol is less than 0.

Abstract: A thermoplastic molding compositions having improved stress cracking resistance is disclosed. The composition contains A) 40 to 99.5 parts by weight of at least one branched resin selected from a first group consisting of aromatic polycarbonate and polyestercarbonate and B) 0.5 to 60 parts by weight of graft polymer containing a grafting shell and a grafting base, said grafting base being other than polybutadiene rubber. The structure of the branched resin contains at least one residue of a branching agent selected from among tri-functional phenolic monomer and tetra-functional phenolic monomer.

Abstract: Thermoplastic molding compositions containing grafted polymers produced with different initiator systems are disclosed. The compositions are distinguished by a combination of good toughness and reduced opacity. As a result, appreciably smaller quantities of pigment are needed to color the molding composition.

Abstract: The present invention relates to a flame retardant thermoplastic resin composition that contains a phenol resin derivative having good char formability, regardless of the base resin. A flame retardant thermoplastic resin composition according to the present invention comprises (A) 100 parts by weight of a thermoplastic resin as a base resin, (B) about 0.1˜100 parts by weight of a phenol resin derivative, and (C) about 0.1˜50 parts by weight of a phosphoric acid ester morpholide compound or a mixture of phosphoric acid ester morpholide compounds. Another flame retardant thermoplastic resin composition according to the present invention comprises (A) 100 parts by weight of a thermoplastic resin as a base resin, (B) about 0.1˜100 parts by weight of polyphenylene ether, (C) about 0.1˜100 parts by weight of a phenol resin derivative, and (D) about 0.1˜50 parts by weight of a phosphoric acid ester morpholide compound or a mixture of phosphoric acid ester morpholide compounds.

Abstract: A thermoplastic molding composition comprising polycarbonate resin, at least one impact modifier and highly pure talc is disclosed. The talc is characterized in that it contains Al2O3 in an amount of less than 1% relative to the weight of said talc. The composition that features high toughness, good processability and low coefficient of thermal expansion is suitable for the manufacture of exterior parts of vehicles.

Abstract: Disclosed are resinous compositions with excellent balance of impact, heat, flow and environmental stress crack resistance, comprising (i) at least one aromatic polycarbonate, (ii) at least one low molecular weight hydrocarbon resin derived from petroleum C5–C9 feedstock and (iii) optionally a second thermoplastic resin which is not polycarbonate resin, (iv) optionally a rubber modified graft copolymer, and (v) optionally a polymeric or non-polymeric organic phosphorus species. Also disclosed is a method for the manufacture of the compositions and for the manufacture of articles thereof.

Abstract: The present invention relates to polymer blends containing a component selected from the group poly(ester)carbonates, graft polymers or mixtures thereof, polyalkylene naphthalate as the second component optionally together with a further component selected from the group of vinyl (co)polymers, polyalkylene terephthalates or mixtures thereof, wherein mixtures of polycarbonate, polyalkylene naphthalate and optionally polyalkylene terephthalate contain no tetrafluoroethylene polymer.

Abstract: A Polymer compositions that features high degree of toughness, very good processability and extremely high gloss is disclosed. The composition contains (I) a graft rubber polymer obtained by emulsion polymerization of styrene and acrylonitrile in the presence of a mixture of (A) a butadiene polymer latex having a mean particle diameter d50?250 nm, a particle size distribution width of 20 to 80 nm and a gel content of 30 to 95 wt. %, (B) a butadiene polymer latex with a mean particle diameter d50>250 to 350 nm, a particle size distribution width of 30 to 100 nm and gel content of 30 to 80 wt. %, and (C) a butadiene polymer latex (C) with a mean particle diameter d50>350 nm, a particle size distribution width of 40 to 150 nm, and a gel content of 50 to 95 wt. %. and (II) a rubber-free copolymer of styrene and acrylonitrile. At least one of (A), (B) and (C) is a product of seed polymerization.

Abstract: Functionalized propylene polymer compositions useful as coupling/compatibilizing agents are provided. The compositions are a mixture of two different functionalized propylene polymers. Polypropylene composites containing fillers and/or non-compatible resins and formulated using the mixed functionalized coupling/compatibilizing agents are also provided.

Abstract: The present invention provides polymer compositions of special graft rubber polymers, in the production of which are employed rubbers with defined particle diameters obtained by seed polymerization using seed latex particles with defined particle diameters.

Abstract: The present invention is a process for producing branched polycarbonate providing for optimum utilization of the branching agent. It was surprisingly found that adding at least a portion of the coupling catalyst to the polymerization at a point during the oligomerization in the reaction results in a higher degree of branching and improved rheological properties.

Abstract: A method for recycling an optical disk includes crushing a recovered optical disk without further treatment into chips that are used as a raw material of a resin composition for forming a film. The resin composition can be formed by injection molding to form a resin molded article. A film is formed on the surface of the resin molded article by plating or coating.

Abstract: A regenerated resin composition comprising (I) a molded article pulverized material (Component A) that satisfies conditions (1) that the molded article pulverized material is a pulverized material of a molded article having an aromatic polycarbonate resin content of 30 to 98% by weight, (2) that the pulverized material has a viscosity average molecular weight of 17,000 to 30,000, and (3) that the pulverized material has a wet heat retention ratio of at least 60%, and (II) an aromatic polycarbonate resin (Component B). According to the present invention, there is provided a regenerated resin composition that comprises a pulverized material from a molded article made of an aromatic polycarbonate resin and that is excellent in the property of retaining physical properties for a long period of time and excellent in mechanical strength.

Abstract: Acid anhydride denatured chlorinated polyolefin (component A) which is composed of a copolymer of propylene and ?-olefin wherein the chlorine contents is 15 to 24% by weight, denatured amount of acid anhydride is 0.6 to 2.0%, weight average molecular weight is 40000 to 120000, and acrylic denatured alkyd resin (component B) which is comprised of alkyd resin polymer part (b1) whose iodine value is 80 or more and oil length is 35 to 70, and acrylic resin polymer part (b2) whose glass-transition temperature is not less than 50° C. wherein the weight average molecular weight is 10000 to 100000, weight ratio of the alkyd part and acrylic part is in a range of from 25/75 to 75/25, are used in a range of from 80/20 to 20/80 (A/B).

Abstract: A compatible blend of polycarbonate resin with a vinyl (co)polymer blending partner is disclosed. The preparation of inventive blend comprise reactive blending of polycarbonate, a vinyl (co)polymer and a novel compatibilizer in the presence of a transesterification catalyst and under conditions of time and temperature designed to promote transesterification. The compatibilizer is the polymerized reaction product of at least one vinyl monomer that contains no hydroxy groups and a hydroxyl containing monomer conforming to (I) where R denotes H or C1–C4 alkyl, R1 denotes H, Cl, Br, C1–C4 alkyl, cyclohexyl, or C1–C4 alkoxy, a is 0 or 1, b is 0 or 1, c is 0 or 1, n is an integer of 0 to 4 and X is an OH group. The compatible blends of the invention are characterized by their improved properties.

Abstract: Improved multi-phase polypropylene composites are provided. The compositions are comprised of a polypropylene base resin, a non-compatible dispersed phase which can be a polymer or filler material and a propylene-ethylene copolymer grafted with a carboxylic acid or carboxylic acid derivative.

Abstract: A substantially transparent antistatic, impact resistant, molding composition comprises a miscible mixture of a polycarbonate resin and a cycloaliphatic polyester resin, and an antistatic polymeric material wherein the mixture of the polycarbonate and the cycloaliphatic polyester resin is present in suitable proportions for substantially matching the index of refraction of the antistatic polymeric material.

Abstract: The invention relates to an impact additive of the core/shell type for thermoplastic polymers. This impact additive comprises a crosslinked elastomeric core based on n-alkyl acrylate and a shell made of poly(alkyl methacrylate) grafted onto said core.

Abstract: A flame-retardant polycarbonate resin composition comprising either a resin mixture of a polycarbonate resin and a styrenic resin, a functional group-having silicone compound, and a fluoro-olefin resin; or a polycarbonate resin, a functional group-having silicone compound, and a core/shell-type, grafted rubbery elastomer; or a resin mixture of a polycarbonate resin and a styrenic resin, a fluoro-olefin resin, an inorganic filler, and a polycarbonate-polyorganosiloxane copolymer and/or a functional group-having silicone resin, which composition and its moldings, exhibit good flame retardance, good impact resistance, and good thermal stability.

Abstract: The present invention provides plastics with high toughness and the preparation thereof. The plastics with high toughness, which have the balance of stiffness and toughness, stable properties and good processability, are obtained by blending the rubber particles having an average particle size of 20 to 200 nm with the pseudoductile plastics, wherein the weight ratio of the rubber particles to the plastics is from 0.5:99.5 to 70:30. The present invention also provides plastics with both high stiffness and high toughness and the preparation thereof. The plastics with both high stiffness and high toughness, which have also an improved heat resistance and good processability, are prepared by blending the rubber particles having an average particle size of 20 to 500 nm and the crystalline plastics, wherein the amount of the rubber particles added in the plastics matrix is from 0.3 to 5 weight parts.

Abstract: Disclosed is a transparent/translucent molding composition and process for making prepared from an impact modifier and a resin blend of polycarbonate and a cycloaliphatic polyester having a matching index of refraction.

Abstract: Disclosed are certain novel polyester compositions particularly useful for shaping or forming into containers and similar shaped articles by thermoforming procedures. The polyester compositions comprise a thermoplastic polyester, an impact modifier and a polyester crystallization rate enhancing component selected from poly(tetramethylene terephthalate) homo- and co-polymers. The polyester compositions exhibit improved crystallization rates as compared to similar compositions not including impact modifier or compositions using other types of crystallization rate enhancing components such as polyolefin-based polymers.

Abstract: A thermoplastic molding composition that features a combination of extremely good toughness, good processability, adjustable surface gloss, good inherent color and reduced opacity is disclosed. The composition contains A) a graft rubber that is the product of free-radical emulsion polymerization using a peroxodisulfate initiator, B) a graft rubber that is the product of free-radical emulsion polymerization using an azo compound initiator and C) a graft polymer that is the product of solution, bulk or suspension polymerization.

Abstract: The present invention relates to polyphosphate ester morpholides, compositions comprising mixtures thereof and thermoplastic resin compositions containing the polyphosphate ester morpholide composition as a flame retardant. The flame retardant compositions comprise mixtures of polyphosphate ester morpholides which are represented by the following general formula I: in which X is 1 or 2; R1 is a C6-C20 aryl group, an alkyl substituted C6-C20 aryl group or a derivative thereof; R2 is a C6-C30 arylene group, an alkyl substituted C6-C30 arylene group or a derivative thereof; n is the average number of morpholide repeating units, m is the average number of R1 repeating units, and n+m is 1 to 5. In accordance with the present invention, it is possible to provide a flame retardant thermoplastic resin compositions having improved flame retardancy even when small amounts of the flame retardant are used.

Abstract: The invention relates to thermoplastic molding materials containing the following main components: A) 2 to 97.9 wt. % of at least one polyester; B) 0 to 95.9 wt. % of at least one polycarbonate; C) 1 to 80 wt. % of at least one graft polymer which is made up of c1) 40 to 80 wt. % of a graft base consisting of a rubber elastic polymer based on alkyl acrylates with 1 to 8 C-atoms in the alkyl radical and with a glass transition temperature of less than 10° C., c2) 20 to 60 wt. % of a graft support consisting of c21) 60 to 95 wt. % styrene or substituted styrenes of general formula (I), wherein R represents an alkyl radical with 1 to 8 C-atoms or a hydrogen atoms and R1 represents an alcohol radical with 1 to 8 C-atoms and the value of n is 1, 2 or 3 and c22) 5 to 40 wt. % of at least one unsaturated nitrile; D) 1 to 80 wt. % of a copolymer consisting of d1) 60 to 95 % styrene or substituted styrenes of general formula (I) or mixtures thereof and d2) 5 to 40 wt. % of at least one unsaturated nitrile; E) 0.

Abstract: The present invention relates to a polycarbonate which can be obtained by a melting method and whose loss angle ? and complex viscosity ?* (Pa·s) measured under the conditions of 250° C. and an angular velocity of 10 rad/s satisfy the following relation (1): 2,500?Tan ?/(?*)?0.

Abstract: A polycarbonate-based thermoplastic resin composition is characterized by comprising a polycarbonate and a substantially gel-free polymer obtained by polymerizing an aromatic vinyl monomer in the presence of a polymer obtained by polymerizing a specific alkyl (meth)acrylate, an aromatic vinyl monomer, and a monomer having two or more unsaturated groups. The composition has excellent moldability (flowability, etc.) while having the intact mechanical properties (impact strength, etc.) inherent in the polycarbonate and has an excellent balance between moldability and mechanical properties. Due to the excellent balance, the composition enables size increase and thickness reduction in molded articles in various fields, especially in the field of domestic electrical appliances and housings for OA apparatuses. The composition is of great industrial value.

Abstract: A thermoplastic molding composition comprising A) at least one member selected from the group consisting of polycarbonate and polyestercarbonate and B) a phosphorus compound is disclosed. The composition wherein A) is a mixture of (A.1) 99.9 to 40 wt. % of branched member, and (A.2) 0.1 to 60 wt. % of linear member, is characterized by high melt stability and improved mechanical properties, particularly improved stress crack resistance under the effect of chemicals and a higher notched impact resistance. The composition is especially suitable for producing profiles, films or sheets of any type in an extrusion process.