EP2928954A1

EP2928954A1 - Flame-retardant polycarbonate molding materials ii

Info

Publication number: EP2928954A1
Application number: EP13799594.0A
Authority: EP
Inventors: Mathieu JUNG; Thomas Eckel; Vera Taschner
Original assignee: Bayer MaterialScience AG
Current assignee: Covestro Deutschland AG
Priority date: 2012-12-07
Filing date: 2013-12-05
Publication date: 2015-10-14
Also published as: CN104822753A; JP2016501304A; US20150307705A1; KR20150093747A; WO2014086944A1; CA2894430A1; MX2015007081A; BR112015012393A2; TW201434895A

Abstract

The invention relates to flame-retardant, impact-modified, high-temperature-stable polycarbonate (PC) compositions and molding materials that have high hydrolysis stability, containing A) 48 - 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 residue, 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 with 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 residue, preferably chlorine, or an OH residue, D) 1.0 - 7.0 parts by weight of at least one organic flame-retardant agent which contains phosphorus and is different from C, E) 0 - 15.0 parts by weight of rubber-free vinyl (co)polymer or polyalkylene terephthalate, F) 0 - 15.0 parts by weight of additives, G) 0.05 - 5.0 parts by weight of anti-dripping agent, wherein all specifications of parts by weight are preferably normalized in such a way that the sum of the parts by weight of all components A+B+C+D+E+F+G in the composition is 100 and at least 50% of the phosphorus amount of the total composition comes from component C. The invention further relates to the use of the compositions to produce molded bodies and the molded bodies produced from the compositions.

Description

Flame-retardant polycarbonate molding compounds II

The present invention relates to flame-retardant, impact-modified, high-temperature-stable polycarbonate (PC) compositions having cyclic phosphazenes which have high hydrolytic stability and good notched impact strength, as well as processes for their preparation and the use of cyclopentes Pho sphazenen as F l amms chutzmitte l in polycarbonate compositions.

EP 1 095 099 A1 describes polycarbonate-ABS molding compositions equipped with phosphazenes and phosphorus compounds which have excellent flame retardancy and good mechanical properties such as weld line strength or notched impact strength.

EP 1 196 498 A1 describes phosphazene-treated molding compositions based on polycarbonate and graft polymers selected from the group of silicone, EP (D) M and acrylate rubbers as graft base, which have excellent flame retardancy and very good mechanical properties, such as resistance to stress cracking or notched impact strength.

EP 1 095 100 A1 describes polycarbonate / ABS molding compositions containing phosphazenes and inorganic nanoparticles which have excellent flame retardancy and very good mechanical properties.

EP 1 095 097 A1 describes phosphazene-modified polycarbonate-ABS molding compositions which have excellent flame retardancy and very good processing properties, the graft polymer being prepared by mass, solution or mass-suspension polymerization processes.

The above documents disclose linear and cyclic phosphazenes. In the cyclic phosphazenes, however, the proportions of trimers, tetramers and higher oligomers are not specified,

US2003 / 092802 Al discloses phenoxyphosphazenes and their preparation and use in polycarbonate-AB molding compositions. The phenoxyphosphazenes are preferably crosslinked and the molding compositions are distinguished by good flame retardancy, good impact strength, high flexural modulus and high melt volume flow rate. The ABS used is not described in detail. Furthermore, in this document the proportions of trimers, tetramers and higher oligomers of the present application are not described. JP2004 155802 discloses cyclic phosphazenes and their use in thermoplastic molding compositions such as polycarbonate and ABS. Polycarbonate-ABS molding compositions with cyclic phosphazenes with precisely defined proportions of trimers, tetramers and higher oligomers are not disclosed.

JP 1995 0038462 describes polycarbonate compositions containing graft polymers, phosphazenes as flame retardants and optionally vinyl copolymers. However, specific structures, compositions and amounts of the flame retardant are not mentioned.

JP 19990176718 describes thermoplastic compositions consisting of aromatic polycarbonate, copolymer of aromatic vinyl monomers and vinyl cyanides, graft polymer of alkyl (meth) acrylates and rubber and phosphazene as flame retardants, which have good flowability.

The object of the present invention is therefore to provide a flame-retardant molding composition which is distinguished by a property combination of good notched impact strength, high heat resistance and high hydrolytic stability with a consistently good UL94V0 classification at 1.5 mm.

Preferably, the molding compositions are flame retardant and meet UL94 V-0 requirements even with thin wall thicknesses (i.e., wall thickness of 1.5 mm).

It has surprisingly been found that compositions containing

A) 48-95 parts by wt., Preferably 65-90 wt. Parts, more preferably 70-85 wt. Parts, particularly preferably 73-88 wt. Parts, aromatic polycarbonate and / or aromatic polyester carbonate,

B) 1.0-20.0 parts by weight, preferably 3.0-18.0 parts by weight, particularly preferably 4.0-16.0 parts by weight, of rubber-modified graft polymer,

C) 1.0-20.0 parts by weight, preferably 1.5-18.0 parts by weight, more preferably 2.0-15.0 parts by weight, particularly preferably 4.0-10.0 parts by weight Parts, at least one cyclic phosphazene of structure (X),

k is 1 or an integer from 1 to 10, preferably a number from 1 to 8, particularly preferably 1 to 5, with a trimere content (k = 1) of 60 to 98 mol%, more preferably of 65 to 95 mol%, particularly preferably from 65 to 90 mol%, and very particularly preferably from 65 to 85 mol%, in particular 70 mol%, based on the component C,

R is the same or different and is an amine radical, in each case, optionally halogenated, preferably fluorine-halogenated, C i to Cg-alkyl, preferably methyl, ethyl, propyl or butyl, C _j - to C§ alkoxy, preferably

Methoxy, ethoxy, propoxy or butoxy, each optionally substituted by alkyl, preferably C _j -C4 alkyl, and / or halogen, preferably chlorine and / or

Bromine, substituted C5- to Cg-cycloalkyl, each optionally substituted by alkyl, preferably C] _C4-alkyl, and / or halogen, preferably chlorine, bromine and / or hydroxy-substituted, Cg- to C20 "aryloxy, preferably phenoxy,

Naphthyloxy, each optionally substituted by alkyl, preferably C ₁ -C 4 -alkyl, and / or halogen, preferably chlorine and / or bromine, substituted C7 to C \ 2 ~

Aralkyl, preferably phenyl-C _j -C4-alkyl, or a halogen radical, preferably chlorine, or an OH radical. 1.0 to 7.0 parts by weight, preferably 1.5 to 6.5 parts by weight, more preferably 2.0 to 6.0 parts by weight, particularly preferably 2.2 to 5.5 parts by weight. Parts, at least one phosphorus-containing organic flame retardant other than C, E) 0 to 15.0 parts by weight, preferably 2.0 to 12.5 parts by weight, more preferably from 3.0 to 9.0 parts by weight, particularly preferably 3.0 to 6.0 parts by weight Parts rubber-free vinyl (co) polymer or polyalkylene terephthalates, F) 0 to 15.0 parts by wt., Preferably from 0.05 to 15.00 parts by wt., More preferably 0.2 to 10.0 wt Parts, more preferably 0.4 to 5.0 parts by weight of additives,

G) 0.05 to 5.0 parts by wt., Preferably 0.1 to 2.0 parts by wt., Particularly preferably 0.1 to 1.0 parts by wt. Antidripping agent. wherein all parts by weight are preferably standardized in the present application such that the sum of the parts by weight of all components A + B + C + D + E + F + G in the composition 100 results, and

at least 50% of the amount of phosphorus of the total composition is from component C.

In a preferred embodiment, the composition consists only of the components A to G.

The desired combination of properties is achieved if at least 50%> of the phosphorus amount needed to achieve the UL94V-0 classification at 1.5 mm originates from component C.

In a preferred embodiment, the composition is free of inorganic flame retardants and flame retardant synergists, in particular aluminum hydroxide, aluminum oxide hydroxide and arsenic and antimony oxides.

In a further preferred embodiment, in which component B is a bulk polymer B2, the proportion of component B is particularly preferably 10-18% by weight, based on the total composition.

The preferred embodiments may be performed individually or linked together.

The invention also provides processes for the preparation of the molding compositions and the use of the molding compositions for the production of moldings, and the use of cyclic phosphazenes having a defined oligomer distribution for the preparation of the compositions according to the invention. The molding compositions of the invention can be used for the production of moldings of any kind. These can be produced by injection molding, extrusion and blow molding. Another form of processing is the production of moldings by deep drawing from previously prepared plates or films.

Examples of such moldings are foils, profiles, housing parts of all types, e.g. for household appliances such as juice presses, coffee machines, blenders; for office machines such as monitors, flat screens, notebooks, printers, copiers; Panels, pipes, electrical installation ducts, windows, doors and other profiles for the building sector (interior and exterior applications) and electrical and electronic parts such as switches, plugs and sockets, as well as body and interior components for commercial vehicles, in particular for the automotive sector. In particular, the molding compositions according to the invention can also be used, for example, for the production of the following moldings or moldings: Interior parts for rail vehicles, ships, airplanes, buses and other motor vehicles, housings of air fresheners contain the electric appliances , Devices for information processing and transmission equipment, Housing and cladding of medical equipment, Enclosures for safety devices, Moldings for sanitary and bath equipment, Grille cover and housing for garden tools.

Component A

Aromatic polycarbonates and / or aromatic polyester carbonates according to component A which are suitable according to the invention are known from the literature or can be prepared by processes known from the literature (for example, see Schnell, Chemistry and Physics of Polycarbonates, Interscience Publishers, 1964, and DE-AS 1 495 626, DE for preparing aromatic polycarbonates -A 2 232 877, DE-A 2 703 376, DE-A 2 714 544, DE-A 3 000 610, DE-A 3 832 396, for the preparation of aromatic polyester carbonates, eg DE-A 3 007 934) ,

The preparation of aromatic polycarbonates z. Example, by reacting diphenols with carbonic acid halides, preferably phosgene and / or with aromatic dicarboxylic acid dihalides, preferably Benzoldicarbonsäuredihalogeniden by the interfacial process, optionally using chain terminators, such as monophenols and optionally using trifunctional or more than trifunctional branching agents, for example triphenols or tetraphenols. Likewise is a preparation via a melt polymerization by reaction of diphenols with, for example, diphenyl carbonate possible.

Diphenols for the preparation of the aromatic polycarbonates and / or aromatic polyester carbonates are preferably those of the formula (I)

a single bond, C ₁ to C ₅ -alkylene, C ₂ to C ₅ -alkylidene, C ₅ to C ₆ -cycloalkylidene,

O, -SO-, -CO-, -S-, -SO2-, C ₆ to C ₁₂ arylene, to the other aromatic optionally

Heteroatom-containing rings may be condensed,

or a radical of the formula (II) or (III)

B is in each case C ₁ to C ₁₂ -alkyl, preferably methyl, halogen, preferably chlorine and / or bromine

x each independently 0, 1 or 2,

p is 1 or 0, and

R ⁵ and R ^{6 are} individually selectable for each X ¹ , independently of one another hydrogen or C ₁ to C ₆ -

Alkyl, preferably hydrogen, methyl or ethyl,

X ¹ carbon and

m is an integer from 4 to 7, preferably 4 or 5, with the proviso that on at least one atom X ¹ , R ⁵ and R ^{6 are} simultaneously alkyl. Preferred diphenols are hydroquinone, resorcinol, dihydroxydiphenols, bis- (hydroxyphenyl) - C ^ C _j -alkanes, bis- (hydroxyphenyl) _-C5 _-C6 -cycloalkanes, bis- (hydroxyphenyl) ethers, bis- (hydroxyphenyl ) -sulfoxides, bis (hydroxyphenyl) ketones, bis (hydroxyphenyl) -sulfones and α, α-bis (hydroxyphenyl) -diisopropyl-benzenes and their nuclear-brominated and / or nuclear-chlorinated derivatives.

Particularly preferred diphenols are 4,4'-dihydroxydiphenyl, bisphenol A, 2,4-bis (4-hydroxyphenyl) -2-methylbutane, 1,1-bis- (4-hydroxyphenyl) -cyclohexane, 1, 1 - Bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane, 4,4'-dihydroxydiphenylsulfide, 4,4'-dihydroxydiphenylsulfone and their di- and tetrabrominated or chlorinated derivatives such as 2,2-bis (3-chloro-4-) hydroxyphenyl) -propane, 2,2-bis (3,5-dichloro-4-hydroxyphenyl) -propane or 2,2-bis (3,5-dibromo-4-hydroxyphenyl) -propane. Particularly preferred is 2,2-bis (4-hydroxyphenyl) propane (bisphenol-A). The diphenols can be used individually or as any mixtures. The diphenols are known from the literature or obtainable by literature methods. Chain terminators suitable for the preparation of the thermoplastic, aromatic polycarbonates are, for example, phenol, p-chlorophenol, p-tert-butylphenol or 2,4,6-tribromophenol, but also long-chain alkylphenols, such as 4- [2- (2,4,4 -Trimethylpentyl)] - phenol, 4- (l, 3-tetramethyl-butyl) -phenol according to DE-A 2,842,005 or monoalkylphenols or dialkylphenols having a total of 8 to 20 carbon atoms in the alkyl substituents such as 3,5-di-tert. Butylphenol, p-iso-octylphenol, p-tert-octylphenol, p-dodecylphenol and 2- (3,5-dimethylheptyl) phenol and 4- (3,5-dimethylheptyl) phenol. The amount of chain terminators to be used is generally between 0.5 mol%, and 10 mol%, based on the molar sum of the diphenols used in each case. The thermoplastic aromatic polycarbonates have average molecular weights (weight average M _w , as measured by GPC (gel permeation chromatography) with polycarbonate standard) of 15,000 to 80,000 g / mol, preferably 19,000 to 32,000 g / mol, particularly preferably 22,000 to 30,000 g / mol. The thermoplastic, aromatic polycarbonates may be branched in a known manner, preferably by the incorporation of 0.05 to 2.0 mol%, based on the sum of the diphenols used, of trifunctional or more than trifunctional compounds, for example those with three and more phenolic groups. Preference is given to using linear polycarbonates, more preferably based on bisphenol-A.

Both homopolycarbonates and copolycarbonates are suitable. For the preparation of copolycarbonates according to the invention according to component A, it is also possible to use 1 to 25% by weight, preferably 2.5 to 25 wt.%, Based on the total amount to be used diphenols, polydiorganosiloxanes with hydroxyaryloxy end groups are used. These are known (US 3 419 634) and can be prepared by literature methods. Also suitable are polydiorganosiloxane-containing copolycarbonates; the preparation of the polydiorganosiloxane-containing copolycarbonates is described, for example, in DE-A 3 334 782.

Aromatic Dicarbonsäuredihalogemde for the preparation of aromatic polyester carbonates are preferably the diacid dichlorides of isophthalic acid, terephthalic acid, diphenyl ether-4,4'-dicarboxylic acid and naphthalene-2,6-dicarboxylic acid.

Particularly preferred are mixtures of the diacid dichlorides of isophthalic acid and terephthalic acid in the ratio between 1:20 and 20: 1.

In the production of polyester carbonates, a carbonyl halide, preferably phosgene, is additionally used as the bifunctional acid derivative.

As chain terminators for the preparation of the aromatic polyester are in addition to the aforementioned monophenols nor their chlorocarbonic acid esters and the acid chlorides of aromatic monocarboxylic acids, which may optionally be substituted by Ci to C22-alkyl groups or by halogen atoms, as well as aliphatic C2 to C22 Monocarbonsäurechloride into consideration.

The amount of chain terminators is in each case 0.1 to 10 mol%, based on moles of diphenol in the case of the phenolic chain terminators and on moles of dicarboxylic acid dichloride in the case of monocarboxylic acid chloride chain terminators.

In the production of aromatic polyester carbonates, one or more aromatic hydroxycarboxylic acids may additionally be used.

The aromatic polyester carbonates may be branched both linearly and in a known manner (see DE-A 2 940 024 and DE-A 3 007 934), preference being given to linear polyestercarbonates.

Examples of suitable branching agents are difunctional or polyfunctional carboxylic acid chlorides, such as trimesic acid trichloride, cyanuric trichloride, 3,3 ', 4,4'-benzophenone tetracarboxylic acid tetrachloride, 1,4,5,8-naphthalene tetracarboxylic acid tetrachloride or pyromellitic acid tetrachloride, in amounts of 0 , 01 to 1.0 mol% (based on the dicarboxylic acid dichlorides used) or difunctional or polyfunctional phenols, such as phloroglucinol, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -hept-2-ene, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -heptane, 1, 3,5-tri- (4-hydroxyphenyl) -benzene, 1,1,1-tri- (4-hydroxyphenyl ) ethane, tri- (4-hydroxyphenyl) -phenylmethane, 2,2-bis [4,4-bis (4-hydroxy-phenyl) -cyclohexyl] -propane, 2,4-bis (4-hydroxyphenyl- isopropyl) -phenol, tetra- (4-hydroxyphenyl) -methane, 2,6-bis (2-hydroxy-5-methyl-benzyl) -4-methyl-phenol, 2- (4-hydroxyphenyl) -2- (2 , 4-dihydroxyphenyl) -propane, tetra (4- [4-hydroxyphenyl-isopropyl] -phenoxy) -methane, 1,4-bis [4,4'-dihydroxytri-phenyl) -methyl] -benzene , be used in amounts of 0.01 to 1, 0 mol% based on diphenols used. Phenolic branching agents can be presented with the diphenols; Acid chloride branching agents may be added together with the acid dichlorides.

In the thermoplastic, aromatic polyester carbonates, the proportion of carbonate structural units can vary as desired. The proportion of carbonate groups is preferably up to 100 mol%, in particular up to 80 mol%, particularly preferably up to 50 mol%, based on the sum of ester groups and carbonate groups. Both the ester and the carbonate portion of the aromatic polyester carbonates may be present in the form of blocks or randomly distributed in the polycondensate.

The thermoplastic, aromatic polycarbonates and polyester carbonates can be used alone or in any desired mixture.

Component B

Suitable graft polymers as component B are both emulsion polymers B1 and bulk polymers B2 and mixtures of B1 and B2.

In a preferred embodiment, component B consists only of polymers B2. Component B 1 is graft polymer prepared in the emulsion polymerization process, in a preferred embodiment,

Bl. l) 5 to 95 wt .-%, preferably 10 to 70 wt .-%, particularly preferably 20 to 60

Wt .-%, based on the component Bl, a mixture of

Bl. 1) 65 to 85% by weight, preferably 70 to 80% by weight, based on B l. l, at least one monomer selected from the group of vinyl aromatics (such as styrene, α-methyl styrene), ring-substituted vinyl aromatics (such as p-methyl styrene, p-chlorostyrene) and methacrylic acid (C1-C8) alkyl esters (such as methyl methacrylate , Ethyl methacrylate) and Bl .1.2) 15 to 35 wt .-%, preferably 20 to 30 wt -.%, Based on B 1.1, at least one monomer selected from the group of vinyl cyanides (such as unsaturated nitriles such as acrylonitrile and methacrylonitrile), (meth) acrylic acid - (C 1 -C 8) -alkyl esters (such as, for example, methyl methacrylate, n-butyl acrylate, tert-butyl acrylate) and derivatives (such as, for example, anhydrides and imides) of unsaturated carboxylic acids (for example maleic anhydride and N-phenylmaleimide)

B1.2) 95 to 5 wt .-%, preferably 90 to 30 wt .-%, particularly preferably 80 to 40 wt .-%, based on the component Bl, at least one elastomeric graft base. The graft base preferably has a glass transition temperature <0 ° C, more preferably <- 20 ° C, particularly preferably <-60 ° C.

Glass transition temperatures, unless otherwise stated in the present invention, determined by means of differential scanning calorimetry (DSC) according to the standard DIN EN 61006 at a heating rate of 10 K / min with definition of the Tg as the midpoint temperature (tangent method) and nitrogen as inert gas.

The graft particles in the component Bl preferably have an average particle size (d.sub.50 value) of from 0.05 to 5 .mu.m, preferably from 0.1 to 1.0 .mu.m, more preferably from 0.2 to 0.5 .mu.m.

The average particle size dso is the diameter, above and below which are each 50% by weight of the particles. Unless explicitly stated otherwise in the present application, it is determined by ultracentrifuge measurement (W. Scholtan, H. Lange, Kolloid, Z. and Z. Polymere 250 (1972), 782-796).

Preferred monomers B 1.1.1 are selected from at least one of the monomers styrene, α-methylstyrene and methyl methacrylate, preferred monomers B l. 1 .2 are selected from at least one of the monomers acrylonitrile, maleic anhydride and methyl methacrylate. Particularly preferred monomers are B 1.1.1 styrene and Bl .1.2 acrylonitrile.

Examples of suitable graft bases B1.2 for the graft polymers B1 are diene rubbers, diene-vinyl block copolymer rubbers, EP (D) M rubbers, ie those based on ethylene / propylene and optionally diene, acrylate, polyurethane, silicone, chloroprene - And ethylene / vinyl acetate rubbers and mixtures of such rubbers or silicone-acrylate composite rubbers in which the silicone and the acrylate components are chemically linked to each other (eg by grafting). Preferred graft bases B1.2 are diene rubbers (for example based on butadiene or isoprene), diene-vinyl block copolymer rubbers (for example based on butadiene and styrene blocks), copolymers of diene rubbers with further copolymerizable monomers (for example according to B 1.1.1 and Bl .1.2) and mixtures of the abovementioned types of rubber. Especially preferred are pure polybutadiene rubber and styrene-butadiene block copolymer rubber.

The gel content of the graft polymers is at least 40% by weight, preferably at least 60% by weight, particularly preferably at least 75% by weight (measured in acetone).

The gel content of the graft polymers, unless otherwise stated in the present invention, determined at 25 ° C as insoluble in acetone as a solvent insoluble fraction (M. Hoffmann, H. Krömer, R. Kuhn, polymer analysis I and II, Georg Thieme Verlag, Stuttgart 1977).

The graft polymers Bl are prepared by free-radical polymerization.

The graft polymer Bl is generally free due to its production, i. non-chemically bonded to the rubber base copolymer of B 1.1.1 and B l .1.2, which is characterized in that it can be dissolved in suitable solvents (such as acetone). Component B 1 preferably contains a free copolymer of B 1.1.1 and Bl. 1.2 which has a weight-average molecular weight (Mw), determined by gel permeation chromatography using polystyrene as standard, of preferably 30,000 to 150,000 g / mol, more preferably 40,000 to 120,000 g / mol.

As component B2, the compositions of the invention may optionally contain graft polymers prepared by the bulk, solution or suspension polymerization process. In a preferred embodiment, these are graft polymers of

B2.1) 5 to 95 wt .-%, preferably 80 to 93 wt .-%, particularly preferably 85 to 92 wt .-%, most preferably 87 to 93 wt .-%, based on the component B2, of a mixture out

B2.1.1) from 65 to 85% by weight, preferably from 70 to 80% by weight, based on the mixture B.2.1, of at least one monomer selected from the group of vinylaromatics (such as, for example, styrene, α-methylstyrene), ring-substituted vinylaromatics (such as p-methylstyrene, p-chlorostyrene) and methacrylic acid (C 1 -C 8) -alkyl esters (such as methyl methacrylate, ethyl methacrylate) and

B2.1.2) 15 to 35 wt .-%, preferably 20 to 30 wt -.% Based on the mixture B2.1, at least one monomer selected from the group of vinyl cyanides (such as unsaturated nitriles such as acrylonitrile and methacrylonitrile), (Meth ) acrylic acid (Cl-C8) -alkyl (such as methyl methacrylate, n-butyl acrylate, tert-butyl acrylate) and derivatives (such as anhydrides and imides) of unsaturated carboxylic acids (for example, maleic anhydride and N-phenyl-maleimide) to B2.2) 95 to 5 wt .-%, preferably 20 to 7 wt .-%, particularly preferably 15 to 8 wt .-%, most preferably 13 to 7 wt .-%, based on the component B2, at least one graft.

The graft base preferably has a glass transition temperature <0 ° C, preferably <-20 ° C, more preferably <-60 ° C. The graft particles in the component B2 preferably have an average particle size (D50 value) of 0.1 to 10 μm, preferably of 0.2 to 2 μm, particularly preferably of 0.3 to 1.0 μm, very particularly preferably of 0 , 3 to 0.6 μιη on.

Preferred monomers B2.1.1 are selected from at least one of the monomers styrene, α-methylstyrene and methyl methacrylate, preferred monomers B2.1.2 are selected from at least one of the monomers acrylonitrile, maleic anhydride and methyl methacrylate.

Particularly preferred monomers are B2.1.1 styrene and B2.1.2 acrylonitrile.

Suitable graft bases B2.2 for the graft polymers B2 are, for example, diene rubbers, diene-vinyl block copolymer rubbers, EP (D) M rubbers, ie those based on ethylene / propylene and mixtures of such rubbers. Preferred graft bases B2.2 are diene rubbers (for example based on butadiene or isoprene), diene-vinyl block copolymer rubbers (for example based on butadiene and styrene blocks), copolymers of diene rubbers with further copolymerizable monomers (for example according to B2.1.1 and B2 .1.2) and mixtures of the aforementioned rubber types. Particularly preferred as the graft base B2.2 are styrene-butadiene block copolymer rubbers and mixtures of styrene-butadiene block copolymer rubbers with pure polybutadiene rubber.

The gel fraction of the graft polymers B2 is preferably 10 to 35% by weight, more preferably 15 to 30% by weight, very particularly preferably 17 to 23% by weight (measured in acetone).

Particularly preferred polymers B2 are, for example, ABS polymers prepared by free-radical polymerization, which in a preferred embodiment up to 10 wt .-%, more preferably bis to 5% by weight, particularly preferably 2 to 5% by weight, based in each case on the graft polymer B2, of n-butyl acrylate.

The graft polymer B2 generally comprises free, i. non-chemically bonded to the rubber base copolymer of B2.1.1 and B2.1.2, which is characterized in that it can be dissolved in suitable solvents (such as acetone).

Component B2 preferably contains free copolymer of B2.1.1 and B2.1.2 which has a weight-average molecular weight (Mw), determined by gel permeation chromatography using polystyrene as standard, of preferably 50,000 to 200,000 g / mol, particularly preferably 70,000 to 150,000 g / mol , more preferably from 80,000 to 120,000 g / mol.

Component C

Phosphazenes according to component C, which are used according to the present invention, are cyclic phosphazenes according to formula (X)

R

in which

R is the same or different and for

an amine radical,

- in each case, optionally halogenated, preferably halogen-halogenated, more preferably monohalogenated, C 1 - to Cg-alkyl, preferably methyl,

Ethyl, propyl or butyl,

C 1 -C -alkoxy, preferably methoxy, ethoxy, propoxy or butoxy,

optionally in each case by alkyl, preferably C ₁ -C 4 -alkyl, and / or

Halogen, preferably chlorine and / or bromine, substituted C5 to Cg-cycloalkyl, optionally in each case by alkyl, preferably C 1 -C 4 -alkyl, and / or halogen, preferably chlorine, bromine and / or hydroxyl-substituted, C 2 -C 2 () -aryloxy, preferably phenoxy, naphthyloxy,

- Each optionally substituted by alkyl, preferably Ci-C4-alkyl, and / or halogen, preferably chlorine and / or bromine, substituted C7- to Ci 2-aralkyl, preferably phenyl-Ci-C4-alkyl, or

a halogen radical, preferably chlorine or fluorine, or

- an OH remainder is.

k has the above meaning.

Preferred are:

Propoxyphosphazene, Phenoxyphosphazen, Methylphenoxyphosphazen, Aminophosphazen and Fluoralkylphosphazene, and phosphazenes of the following structures:

In the compounds shown above, k = 1, 2 or 3.

Preference is given to phenoxyphosphazene (all R = phenoxy) with a proportion of oligomers with k = 1 (Cl) of 60 to 98 mol .-%.

In the event that the phosphazene according to formula (X) is halogen-substituted on the phosphorus, z. B. from incompletely reacted starting material, the proportion of this phosphorus halogen-substituted phosphazene is preferably less than 1000 ppm, more preferably less than 500ppm.

The phosphazenes can be used alone or as a mixture, i. the radical R may be the same or 2 or more radicals in the formula (X) may be different. The radicals R of a phosphazene are preferably identical.

In a further preferred embodiment, only phosphazenes with the same R are used. In a preferred embodiment, the proportion of tetramers (k = 2) (C2) is from 2 to 50 mol% based on the component C, more preferably from 5 to 40 mol%, even more preferably from 10 to 30 mol. -%, particularly preferably from 10 to 20 mol .-%.

In a preferred embodiment, the proportion of higher oligomeric phosphazenes (k = 3, 4, 5, 6 and 7) (C3) from 0 to 30 mol .-% based on the component C, more preferably from 2.5 to 25 mol .%, even more preferably from 5 to 20 mol%, and more preferably from 6 to 15 mol%.

In a preferred embodiment, the proportion of the oligomers with k> = 8 (C4) from 0 to 2.0 mol .-%> based on the component C, and preferably from 0.10 to 1.00 mol .-%> ,

In a further preferred embodiment, the phosphazenes of component C fulfill all three aforementioned conditions with regard to the proportions (C 2 -C 4).

Component C is preferably a phenoxyphosphazene having a trimere content (k = 1) of 65 to 85 mol%, a tetramer content (k = 2) of 10 to 20 mol%, a proportion of higher oligomeric phosphazenes (k = 3,4,5,6 and 7) from 5 to 20 mol .-%> and phosphazene oligomers with k> = 8 from 0 to 2 mol .-%>, based on the component C. Component C is particularly preferably a phenoxyphosphazene having a trimere content (k = 1) of 70 to 85 mol%, a tetramer proportion (k = 2) of 10 to 20 mol%, a proportion of higher oligomeric phosphazenes (k = 3,4,5,6 and 7) from 6 to 15 mol .-% and phosphazene oligomers with k> = 8 from 0.1 to 1 mol .-%, based on the component C.

In a further particularly preferred embodiment, the component C is a Phenoxyphosphazen with a trimer content (k = l) of 65 to 85 mol .-%, a tetramer content (k = 2) of 10 to 20 mol .-%, a proportion of higher oligomers Phosphazenes (k = 3,4,5,6 and 7) of 5 to 15 mol .-% and phosphazene oligomers with k> = 8 from 0 to 1 mol .-%, based on the component C.

N defines the weighted arithmetic mean of k according to the following formula:

Where x is; the proportion of the oligomer k; and it holds that the sum of all x; is equal to 1.

In an alternative embodiment, n is in the range from 1.10 to 1.75, preferably from 1.15 to 1.50, more preferably from 1.20 to 1.45, and particularly preferably from 1.20 to 1.40 ( Area limits included). The phosphazenes and their preparation are described, for example, in EP-A 728 811, DE-A 1 961668 and WO 97/40092.

The oligomer compositions of the phosphazenes in the respective blend samples can also be detected and quantified after compounding by means of ³¹ P NMR (chemical shift, δ trimer: 6.5 to 10.0 ppm, δ tetramer: -10 to -13.5 ppm; δ higher oligomers: -16.5 to -25.0 ppm). Component D

Phosphorus-containing flame retardants D in the sense according to the invention are preferably selected from the groups of mono- and oligomeric phosphoric and phosphonic acid esters and phosphonatoamines, it also being possible to use mixtures of a plurality of components selected from one or more of these groups as flame retardants. Other halogen-free phosphorus compounds not specifically mentioned here can also be used alone or in any combination with other halogen-free phosphorus compounds.

Preferred mono- and oligomeric phosphoric or phosphonic acid esters are phosphorus compounds of the general formula (V)

wherein

R 1, R 2, R 3 and R 4, each independently of the other optionally halogenated C 1 to C 8 alkyl, each optionally substituted by alkyl, preferably C 1 to C 4 alkyl, and / or halogen, preferably chlorine, bromine, substituted C 5 to C 6 cycloalkyl, C 6 to C20 aryl or C7 to C12 aralkyl, n are independently 0 or 1, q is 0 to 30 and

X is a mononuclear or polynuclear aromatic radical having 6 to 30 C atoms, or a linear or branched aliphatic radical having 2 to 30 C atoms, which may be OH-substituted and may contain up to eight ether bonds.

Preferably, R 1, R 2, R 3 and R 4 independently of one another are C 1 - to C 4 -alkyl, phenyl, naphthyl or phenyl-C 1 -C 4 -alkyl. The aromatic groups R 1, R 2, R 3 and R 4 may in turn be substituted by halogen and / or alkyl groups, preferably chlorine, bromine and / or C 1 to C 4 alkyl. Particularly preferred aryl radicals are cresyl, phenyl, xylenyl, propylphenyl or butylphenyl and the corresponding brominated and chlorinated derivatives thereof. X in the formula (V) is preferably a mononuclear or polynuclear aromatic radical having 6 to 30 carbon atoms. This is preferably derived from diphenols of the formula (I). n in the formula (V) may, independently of one another, be 0 or 1, preferably n is 1. q represents integer values of 0 to 30, preferably 0 to 20, particularly preferably 0 to 10, in the case of mixtures for average values from 0.8 to 5.0, preferably from 1.0 to 3.0, more preferably from 1.05 to 2.00, and most preferably from 1.08 to 1.60.

X is particularly preferred for

or their chlorinated or brominated derivatives, in particular, X is derived from resorcinol, hydroquinone, bisphenol A or diphenylphenol. X is particularly preferably derived from bisphenol A.

Phosphorus compounds of the formula (V) are, in particular, tributyl phosphate, triphenyl phosphate, tricresyl phosphate, diphenyl cresyl phosphate, diphenyl octyl phosphate, diphenyl 2-ethyl cresyl phosphate, tri (isopropylphenyl) phosphate, resorcinol bridged oligophosphate and bisphenol A bridged oligophosphate. The use of oligomeric phosphoric acid esters of the formula (V) derived from bisphenol A is particularly preferred.

Highly preferred as component D is bisphenol A-based oligophosphate according to formula (Va).

The phosphorus compounds according to component D are known (cf., for example, EP-A 0 363 608, EP-A 0 640 655) or can be prepared by known methods in an analogous manner (eg Ullmanns Enzyklopadie der technischen Chemie, Vol. 301 ff. 1979; Houben-Weyl, Methods of Organic Chemistry, Vol. 12/1, p. 43; Beilstein, Vol. 6, p. 177).

As component D according to the invention it is also possible to use mixtures of phosphates having a different chemical structure and / or having the same chemical structure and different molecular weight.

Preference is given to using mixtures having the same structure and different chain length, the stated q value being the mean q value. The mean q value is determined by determining the composition of the phosphorus compound (molecular weight distribution) by means of high pressure liquid chromatography (HPLC) at 40 ° C. in a mixture of acetonitrile and water (50:50) and from this the mean values for q are calculated , Furthermore, phosphonatamines, as described in WO 00/00541 and WO 01/18105, can be used as flame retardants.

The flame retardants of component D can be used alone or in any mixture with each other or in admixture with other flame retardants.

If the compositions according to the invention are provided with a flame retardant, an antidripping agent, preferably polytetrafluoroethylene (PTFE), is preferably additionally present.

Component E Component E comprises one or more thermoplastic vinyl (co) polymers or polyalkylene terephthalates. Suitable vinyl (co) polymers E are polymers of at least one monomer from the group of vinylaromatics, vinyl cyanides (unsaturated nitriles), (meth) acrylic acid (Ci-Cg) - alkyl esters, unsaturated carboxylic acids and derivatives (such as anhydrides and imides) unsaturated carboxylic acids. Particularly suitable are (co) polymers of

E. l 50 to 99, preferably 60 to 80 parts by weight of vinylaromatics and / or ring-substituted vinylaromatics such as styrene, α-methylstyrene, p-methylstyrene, p-chlorostyrene) and / or (meth) acrylic acid (Ci-C8) - Alkyl esters, such as methyl methacrylate, ethyl methacrylate), and E.2 1 to 50, preferably 20 to 40 parts by weight of vinyl cyanides (unsaturated nitriles) such as acrylonitrile and methacrylonitrile and / or (meth) acrylic acid (Ci-C8) alkyl esters, such as Methyl methacrylate, n-butyl acrylate, t-butyl acrylate, and / or unsaturated carboxylic acids, such as maleic acid, and / or derivatives, such as anhydrides and imides, unsaturated carboxylic acids, for example maleic anhydride and N-phenylmaleimide).

The vinyl (co) polymers E are resinous, thermoplastic and rubber-free. Particularly preferred is the copolymer of E. l styrene and E.2 acrylonitrile.

The (co) polymers according to E are known and can be prepared by free-radical polymerization, in particular by emulsion, suspension, solution or bulk polymerization. The (co) polymers preferably have average molecular weights M w (weight average, determined by light scattering or sedimentation) of between 15,000 and 200,000 g / mol, more preferably between 100,000 and 150,000 g / mol.

In a particularly preferred embodiment, E is a copolymer of 77% by weight of styrene and 23% by weight of acrylonitrile having a weight-average molecular weight M _w of 130,000 g / mol.

Suitable as component E, the compositions according to the invention comprise one or a mixture of two or more different polyalkylene terephthalates. Polyalkylene terephthalates in the context of the invention are polyalkylene terephthalates which are derived from terephthalic acid (or its reactive derivatives, for example dimethyl esters or anhydrides) and alkanediols, cycloaliphatic or araliphatic diols and mixtures thereof, for example based on propylene glycol, butanediol, pentanediol, hexanediol, 1, 2. Cyclohexanediol, 1,4-cyclohexanediol, 1,3-cyclohexanediol, and cyclohexyldimethanol, with the diol component of the invention having more than 2 carbon atoms. Accordingly, polybutylene terephthalate and / or polytrimethylene terephthalate, most preferably polybutylene terephthalate, are preferably used as component E. The polyalkylene terephthalates according to the invention may also contain up to 5% by weight of isophthalic acid as the monomer of the diacid. Preferred polyalkylene terephthalates can be prepared from terephthalic acid (or its reactive derivatives) and aliphatic or cycloaliphatic diols having 3 to 21 carbon atoms by known methods (Kunststoff-Handbuch, Vol. VIII, p. 695 FF, Carl Hanser Verlag, Munich 1973 ). Preferred polyalkylene terephthalates contain at least 80, preferably at least 90 mol%, based on the diol component, 1,3-propanediol and / or butanediol-1,4-radicals.

In addition to terephthalic acid residues, the preferred polyalkylene terephthalates may contain up to 20 mol% of radicals of other aromatic dicarboxylic acids having 8 to 14 C atoms or aliphatic dicarboxylic acids having 4 to 12 C atoms, such as radicals of phthalic acid, isophthalic acid, naphthalene, dicarboxylic acid, 4,4'-diphenyldicarboxylic acid, succinic, adipic, sebacic, azelaic, cyclohexanediacetic, cyclohexanedicarboxylic.

The preferred polyalkylene terephthalates may contain, in addition to propanediol-1,3- or butanediol-1,4-radicals, up to 20 mol% of other aliphatic diols having 3 to 12 carbon atoms or cycloaliphatic diols having 6 to 21 carbon atoms, e.g. Residues of 2-ethylpropane-1,3-diol, neopentyl glycol, 1,5-pentanediol, 1,6-hexanediol, cyclohexane-1,4-dimethanol, 3-methylpentane-2,4-diol, 2-methyl- pentane-2,4-diol, 2,2,4-trimethylpentane-1,3-diol and 2-ethylhexane-1,6-diol, 2,2-diethyl-1,3-propanol, 2,5-hexanediol, 1, 4-di (β-hydroxyethoxy) benzene, 2,2-bis (4-hydroxycyclohexyl) propane, 2,4-dihydroxy-1,1,3,3-tetramethylcyclobutane, 2,2- bis (3-.beta.-hydroxyethoxyphenyl) propane and 2,2-bis (4-hydroxypropoxyphenyl) propane (DE-A 24 07 674, 24 07 776, 27 15 932).

The polyalkylene terephthalates may be prepared by incorporation of relatively small amounts of trihydric or trihydric alcohols or of tri or tetrabasic carboxylic acids such as those described e.g. in DE-A 19 00 270 and US-A 3,692,744 are branched. Examples of preferred branching agents are trimesic acid, trimellitic acid, trimethylolethane and -propane and pentaerythritol.

It is advisable to use no more than 1 mol% of the branching agent, based on the acid component. Particular preference is given to polyalkylene terephthalates which are prepared solely from terephthalic acid or its reactive derivatives (for example, their dialkyl esters, such as dimethyl terephthalate) and Propanediol-1,3 and / or 1,4-butanediol have been prepared (polypropylene and polybutylene terephthalate), and mixtures of these polyalkylene terephthalates.

Preferred polyalkylene terephthalates are also copolyesters which are prepared from at least two of the abovementioned acid components and / or from at least two of the abovementioned alcohol components; particularly preferred copolyesters are poly (propylene glycol 1, 3-butanediol-1, 4) terephthalates.

The polyalkylene terephthalates generally have an intrinsic viscosity of about 0.4 to 1.5 dl / g, preferably 0.5 to 1.3 dl / g, each measured in phenol / o-dichlorobenzene (1: 1 parts by weight ) at 25 ° C.

In an alternative embodiment, the polyesters prepared according to the invention can also be used in admixture with other polyesters and / or further polymers, mixtures of polyalkylene terephthalates with other polyesters preferably being used here.

Further additives F

The composition may contain other conventional polymer additives such as flame retardant synergists other than antidrippers, lubricants and mold release agents (for example pentaerythritol tetrastearate), nucleating agents, stabilizers (for example UV / light stabilizers, thermal stabilizers, antioxidants, transesterification inhibitors, hydrolysis stabilizers), antistatic agents (for example carbon blacks, carbon fibers, carbon Nanotubes and organic antistats such as polyalkylene ethers, alkyl sulfonates or polyamide-containing polymers) and dyes, pigments, fillers and reinforcing materials, in particular glass fibers, mineral reinforcing materials and carbon fibers.

As stabilizers sterically hindered phenols and phosphites or mixtures thereof, such as, for example, Irganox® B900 (Ciba Specialty Chemicals) are preferably used. Pentaerythritol tetrastearate is preferably used as a mold release agent. Further, it is preferable to add a black pigment (e.g., black pearls).

Particularly preferred molding compositions comprise, as component F, in addition to optional further additives, a mold release agent, more preferably pentaerythritol tetrastearate, in 0.1 to 1.5 parts by weight, preferably 0.2 to 1.0 part by weight, more preferably 0.3 to 0.8 parts by weight. Particularly preferred molding compositions contain, as component F, in addition to optional further additives, at least one stabilizer, for example selected from the group of steric hindered phenols, phosphites and mixtures thereof, and particularly preferably Irganox® B900, in 0.01 to 0.5 parts by weight, preferably 0.03 to 0.4 parts by weight, particularly preferably 0.06 to 0.3 wt . -Share. Furthermore, the combination of PTFE (component G), pentaerythritol tetrastearate and Irganox B900 with phosphorus-based flame retardants, as component C and D is particularly preferred.

Compensants G In particular, polytetrafluoroethylene (PTFE) or PTFE-containing compositions such as masterbatches of PTFE are used as anti-dripping agents with polymers or copolymers containing styrene or methyl methacrylate, as a powder or as a coagulated mixture, e.g. with component B, used. The fluorinated polyolefins used as Antidrippingmittel are high molecular weight and have glass transition temperatures of above -30 ° C, usually of about 100 ° C, fluorine contents, preferably from 65 to 76, in particular from 70 to 76 wt .-%, average particle diameter d 50 of 0 , 05 to 1000, preferably 0.08 to 20 μιη. In general, the fluorinated

Polyolefins have a density of from 1.2 to 2.3 g / cn. Preferred fluorinated polyolefins are polytetrafluoroethylene, polyvinylidene fluoride, tetrafluoroethylene / hexafluoropropylene and ethylene / tetrafluoroethylene copolymers. The fluorinated polyolefins are known (see "Vinyl and Related Polymers" by Schildknecht, John Wiley & Sons, Inc., New York, 1962, pages 484-494; "Fluoropolymers" by Wall, Wiley-Interscience, John Wiley & Sons, Inc., New York, Vol. 13, 1970, pages 623-654; "Modern Plastics Encyclopedia", 1970-1971, Vol. 47, No. 10A, October 1970, Mc Graw-Hill, Inc., New York, page 134 and 774; "Modern Plastics Encyclopedia", 1975-1976, October 1975, Vol. 52, No. 10A, Mc Graw-Hill, Inc., New York, pages 27, 28 and 472, and U.S. Patents 3,671,487, 3 723,373 and 3,838,092).

They can be prepared by known methods, for example by polymerization of tetrafluoroethylene in an aqueous medium with a free-radical-forming catalyst, for example sodium, potassium or ammonium peroxydisulfate at pressures of 7 to 71 kg / cm.sup.3 and at temperatures of 0 to 200.degree C, preferably at temperatures of 20 to 100 ° C. (Further details see, for example, US Pat. No. 2,393,967). Depending on the form of use, the density of these materials may be between 1.2 and 2.3 g / cw, the average particle size between 0.05 and 1000 μιη. The inventively preferred fluorinated polyolefins have average particle diameter of 0.05 to 20 μηι, preferably 0.08 to 10 μτη, and a density of 1.2 to 1.9 g / cw? -

Suitable fluorinated polyolefins G which can be used in powder form are tetrafluoroethylene polymers having an average particle diameter of from 100 to 1000 μmol ωκΐ densities of 2.0 g / cw? to 2.3 g / cn Suitable tetrafluoroethylene polymer powders are commercially available products and are available, for example, from DuPont under the trade name Teflon®.

Particularly preferred flame-retardant compositions contain, as component G, in addition to optional further additives, a fluorinated polyolefin in 0.05 to 5.0 parts by wt., Preferably 0.1 to 2.0 parts by wt., Particularly preferably 0.1 to 1.0 Parts by weight.

The following examples serve to further illustrate the invention.

Component A

Linear polycarbonate based on bisphenol A having a weight-average molecular weight M _w of 27500 g / mol (determined by GPC in dichloromethane with polycarbonate as standard).

Component B ABS polymer prepared by bulk polymerization of 82 wt .-% based on the ABS polymer of a mixture of 24 wt .-% acrylonitrile and 76 wt .-% of styrene in the presence of 18 wt .-% based on the ABS Polymer of a polybutadiene-styrene block copolymer rubber having a styrene content of 26% by weight. The weight-average molecular weight M _{w of} the free SAN copolymer fraction in the ABS polymer is 80 000 g / mol (measured by GPC in THF). The gel content of the ABS polymer is 24% by weight (measured in acetone).

Component C

Phenoxyphosphazene of the formula (XI) with a proportion of oligomers with k = 1 of 70 mol .-%, a proportion of oligomers with k = 2 of 18 mol .-% and a proportion of oligomers with k> 3 of 12 mol. %.

Component D

Bisphenol-A-based, 8.9% phosphorus content.

Component Fl

Pentaerythritol tetrastearate as lubricant / release agent Component F2 Thermostabilizer, Irganox® B900 (mixture of 80% Irgafos® 168 and 20% Irganox® 1076; BASF AG; Ludwigshafen / Irgafos® 168 (tris (2,4-di-tert-butyl-phenyl ) phosphite) / Irganox® 1076 (2,6-di-tert-butyl-4- (octadecanoxycarbonylethyl) phenol)

Component G

Coagulated mixture of emulsions of fluorinated polyolefins with emulsions of a copolymer based on styrene-acrylonitrile (each 50% by weight) (Cycolac® 449 from Sabic). Production and testing of molding compounds

On a twin-screw extruder (ZSK-25) (Werner and Pfleiderer), the feedstocks listed in Table 1 are compounded at a speed of 225 rpm and a throughput of 20 kg / h at a machine temperature of 260 ° C and granulated. The finished granules are processed on an injection molding machine to the corresponding test specimens (melt temperature 240 ° C, mold temperature 80 ° C, flow front speed 240 mm / s).

To characterize the properties of the materials, the following methods were used:

The IZOD notched impact strength was measured according to ISO 180 / 1A on single-sided molded test bars of the dimension 80 mm x 10 mm x 4 mm.

The heat resistance was measured in accordance with ISO 306 (Vicat softening temperature, method B with 50 N load and a heating rate of 120 K / h) on single-sided test bars of dimension 80 mm xl 0 mm x 4 mm.

Melt flowability was evaluated by melt volume flow rate (MVR) measured according to ISO 1133 at a temperature of 260 ° C and with a 5 kg punch load.

As a measure of the resistance to hydrolysis of the prepared compositions, the change in MVR measured according to ISO 1133 at 260 ° C with a stamping load of 5 kg at a 7-day storage of the granules at 95 ° C and 100% relative humidity ("FWL storage" In this case, the increase in the MVR value relative to the MVR value before the corresponding storage was calculated as AMVR (hydr.), Which is defined by the formula below.

AMVR (hydr.) = ^{MVR to FWL ~} storage) - MVRjvor storage) _%

MVRiyor storage)

The fire behavior was measured according to UL 94V on bars measuring 127 x 12.7 x 1.5 mm.

From Table 1 it can be seen that the compositions of Examples 4, 5 and 6, in which more than 50% of the amount of phosphorus required to reach the UL94V-0 classification at 1.5 mm originates from the phosphazene component, accomplishes the object of the invention, ie Combination of high notched impact strength (no brittle fracture), heat resistance and Hydrolysis stability (<100% deviation from the MVR initial value 260 ° C / 5kg after storage for 24h / 95 ° C / 100% relative humidity), with a UL94V-0 classification at 1.5 mm.

Table 1: Composition and properties of the molding compositions

Claims

claims

Containing compositions

48-95 parts by weight of aromatic polycarbonate and / or aromatic polyester-carbonate,

1.0-20.0 parts by weight of rubber-modified graft polymer,

1.0-20.0 parts by weight, of at least one cyclic phosphazene, according to formula (X)

where k is 1 or an integer from 1 to 10, preferably a number from 1 to 8, particularly preferably 1 to 5,

wherein the trimer content (k = l) of 60 to 98 mol .-% based on the component C

is and where

R

each is the same or different and is an amine radical, in each case, optionally halogenated, preferably fluorine halogenated, Ci to Cg-alkyl, preferably methyl, ethyl, propyl or butyl, C _j - to C§ alkoxy, preferably

Methoxy, ethoxy, propoxy or butoxy, in each case optionally by alkyl, preferably CT-C _{/ j-} alkyl, and / or halogen, preferably chlorine and / or

Bromine, substituted C5 to Cg-cycloalkyl, in each case optionally substituted by alkyl, preferably C ₁ -C 4 alkyl, and / or halogen, preferably chlorine, bromine and / or hydroxy-substituted, C - to C2Q-aryloxy, preferably phenoxy, Naphthyloxy, in each case optionally substituted by alkyl, preferably -C CT / _j alkyl, and / or halogen, preferably chlorine and / or bromine, substituted C7 to C 2-

Aralkyl, preferably phenyl-C _j -C _{/ j} alkyl, or a halogen radical, preferably chlorine, or an OH radical.

1.0 to 7.0 parts by weight of at least one phosphorus-containing organic

Flame retardant other than C,

0 - 15.0 parts by weight of rubber-free vinyl (co) polymer or

polyalkylene

0 - 15.0 parts by weight of additives,

0.05 to 5.00 parts by weight of anti-dripping agent.

wherein all parts by weight are preferably normalized such that the sum of the parts by weight of all components A + B + C + D + E + F + G in the composition 100 results, and

wherein at least 50% of the amount of phosphorus of the total composition is from component C.

Second

Compositions according to Claim 1, characterized in that the proportion of trimers (k = 1) is 60 to 98 mol%, more preferably 65 to 95 mol%, more preferably 65 to 90 mol%>, based on the component C is.

3. Compositions according to claim 1 or 2, characterized in that the proportion of component C is 4.0 to 10.0 parts by weight.

4. Compositions according to one of the preceding claims, characterized in that component C is selected from the group consisting of propoxyphosphazenes, phenoxyphosphazenes, methylphenoxyphosphazenes, aminophosphazones and the like

Fluoroalkylphosphazenes.

5. Compositions according to one of the preceding claims, characterized in that R = phenoxy.

6. A composition according to claim 1, characterized in that the proportion of trimers (k = l) is 65-85 mol .-%, based on the component C.

7. Compositions according to one of the preceding claims, characterized in that the trimer fraction (k = l) of 65 to 85 mol .-%, the tetramer content (k = 2) of 10 to 20 mol .-%, the proportion of higher oligomers Phosphazenes (k = 3,4,5,6 and 7) of 5 to 15 mol .-%, and the proportion of phosphazene oligomers with k> = 8 from 0 to 1 mol .-%, each based on the component C. , is.

8. Compositions according to one of the preceding claims, characterized in that component D) is contained in a proportion of 2.2 to 5.5 parts by weight.

9. Compositions according to one of the preceding claims, characterized in that the phosphorus-containing flame retardant (D) is a bisphenol-A based oligophosphate according to formula (Va)

10. Compositions according to one of the preceding claims, containing as component F at least one additive selected from the group consisting of flame retardant synergists, antidripping agents, lubricants and mold release agents, nucleating agents, stabilizers, antistatics, dyes, pigments and fillers and reinforcing agents includes.

11. Compositions according to one of the preceding claims, characterized in that the grafting base of component B is selected from the group consisting of diene rubbers, EP (D) M rubbers, acrylate, polyurethane, silicone, chloroprene and ethylene / vinyl acetate Rubbers.

12. Compositions according to one of the preceding claims, characterized in that component B is a bulk polymer.

13. Use of cyclic phosphazenes, according to formula (X)

for the production of flame-retardant polymer compositions having a combination of properties of good impact strength, high heat resistance and high stability against hydrolysis with a consistently good UL94V0 classification at 1.5 mm,

in which

k is 1 or an integer from 1 to 10, preferably a number from 1 to 8, particularly preferably 1 to 5, wherein the trimers content (k = l) of 60 to 98 mol .-% based on the component C.

is and where

R

each is the same or different and is an amine radical, in each case, optionally halogenated, preferably fluorine-halogenated, C 1 - to Cg-alkyl, preferably methyl, ethyl, propyl or butyl, CT - to Cg-alkoxy, preferably

Bromine, substituted C5 to CSS-cycloalkyl, in each case optionally substituted by alkyl, preferably C ₁ -C 4 alkyl, and / or halogen, preferably chlorine, bromine and / or hydroxy-substituted, C - to C20 "aryloxy, preferably phenoxy,

Aralkyl, preferably phenyl-C _j -C4-alkyl, or a halogen radical, preferably chlorine, or an OH radical.

14. Use of the compositions according to any one of claims 1 to 12 for the production of injection molded or thermoformed moldings.

15. Shaped body obtainable from compositions according to any one of claims 1-12.