Ignition resistant carbonate polymer composition

1. An ignition resistant carbonate polymer composition comprising:

(i) an aromatic polycarbonate or an aromatic polyester carbonate,

(ii) a graft polymer,

(iii) optionally one or more thermoplastic vinyl (co)polymer,

(iv) optionally one or more thermoplastic polyester polymer,

(v) an aromatic phosphorous compound represented by the formula I:

wherein,

R 1 , R 2 , R 3 and R 4 independently of one another each denote optionally halogenated C 1 - to C 8 -alkyl, or C 5 - to C 6 -cycloalkyl, C 6 - to C 20 -aryl or C 7 - to C 12 -aralkyl, in each case optionally substituted by alkyl and/or halogen,

X denotes a mono- or polynuclear aromatic radical having 6 to 30 C atoms,

n independently of one another is 0 or 1,

N represents values from 0 to 30,

(vi) a mixture of a fibril forming polytetrafluoroethylene polymer and a fluorothermoplast, and

(vii) optionally an hypophosphorous acid metal salt.

2. An ignition resistant carbonate polymer composition comprising:

(i) from 40 to 99 parts by weight of an aromatic polycarbonate or an aromatic polyester carbonate,

(ii) from 0.5 to 60 parts by weight of a graft polymer of

(ii.a) from 5 to 99 percent by weight of one or more vinyl monomers on

(ii.b) from 95 to 1 percent by weight of one or more grafting backbones with a glass transition temperature (T g ) of less than 10° C.,

(iii) from 0 to 45 parts by weight of at least one thermoplastic vinyl (co)polymer,

(iv) from 0 to 45 parts by weight of at least one thermoplastic polyester polymer,

(v) from 0.5 to 40 parts by weight of an aromatic phosphorous compound represented by the formula I:

wherein in the formula I,

R 1 , R 2 , R 3 and R 4 independently of one another each denote optionally halogenated C 1 - to C 8 -alkyl, or C 5 - to C 6 -cycloalkyl, C 6 - to C 20 -aryl or C 7 - to C 12 -aralkyl, in each case optionally substituted by alkyl and/or halogen,

X denotes a mono- or polynuclear aromatic radical having 6 to 30 C atoms,

n independently of one another is 0 or 1,

N represents values from 0 to 30,

(vi) from 0.01 to 5 parts by weight of a mixture of a fibril forming polytetrafluoroethylene polymer and a fluorothermoplast, and

(vii) from 0 to 30 parts by weight of an hypophosphorous acid metal salt, wherein parts by weight are based on the total weight of the ignition resistant carbonate polymer composition.

3. The ignition resistant carbonate polymer composition of claim 1 wherein the graft polymer is present in an amount of from 1 to 40 parts by weight and the thermoplastic polyester polymer is present in an amount of from 1 to 30 parts by weight, wherein parts by weight are based on the total weight of the ignition resistant carbonate polymer composition wherein the thermoplastic polyester polymer is one or more of PET, PBT, or mixtures thereof wherein each thermoplastic polyester polymer independently has an intrinsic viscosity of from 0.4 to 1.5 dl/g.

4. The ignition resistant carbonate polymer composition of claim 1 wherein X is derived from a diol selected from diphenylphenol, bisphenol A, resorcinol, or hydroquinone.

5. The ignition resistant carbonate polymer composition of claim 1 wherein the phosphorous compound (v) comprises a mixture of from 3 to 95 weight percent monophosphate compound of formula I and 97 to 5 weight percent oligomeric phosphate compound of formula I, weight percent based on the total weight of the phosphorus compounds (v).

6. The ignition resistant carbonate polymer composition of claim 1 wherein the mixture of the fibril forming polytetrafluoroethylene polymer and the fluorothermoplast is present in an amount of from 0.1 to 3 parts by weight based on the total weight of the ignition resistant carbonate polymer composition.

7. The ignition resistant carbonate polymer composition of claim 1 wherein in component (vi) the fluorothermoplast comprises a polymer of interpolymerized units derived from tetrafluoroethylene (TFE) and hexafluoropropylene (HFP), a polymer of interpolymerized units derived from TFE, HFP and vinylidenefluoride (VDF), a polymer of interpolymerized units derived from TFE, HFP and a monomer represented by formula VI, or a polymer derived from interpolymerized units derived from TFE and a monomer represented by formula VI:

R 8 2 C═CR 8 2   VI

wherein each of R 8 is independently selected from H, Cl, or an alkyl group of from 1 to 8 carbon atoms, a cyclic alkyl group of from 1 to 10 carbon atoms, or an aryl group of from 1 to 8 carbon atoms.

8. The ignition resistant carbonate polymer composition of claim 1 wherein in component (vi) the fluorothermoplast comprises a terpolymer having interpolymerized units derived from tetrafluoroethylene (TFE), hexafluoropropylene (HFP) and vinylidenefluoride (VDF).

9. The ignition resistant carbonate polymer composition of claim 1 wherein in the hypophosphorous acid metal salt (vii) is aluminium hypophosphite, calcium hypophosphite, or mixtures there of and present in an amount defined by the ratio of components (v):(vii) of from 1:2 to 1:5.

10. A method for making an ignition resistant carbonate polymer composition comprising the step of melt-compounding:

(i) from 40 to 99 parts by weight of an aromatic polycarbonate or an aromatic polyester carbonate,

(ii) from 0.5 to 60 parts by weight of a graft polymer of

(ii.a) from 5 to 99 parts by weight of one or more vinyl monomers on

(ii.b) from 95 to 1 percent by weight of one or more grafting backbones with a glass transition temperature (T g ) of less than 10° C.,

(iii) from 0 to 45 parts by weight of at least one thermoplastic vinyl (co)polymer,

(iv) from 0 to 45 parts by weight of at least one thermoplastic polyester polymer,

(v) from 0.5 to 40 parts by weight of an aromatic phosphorous compound represented by the structure:

wherein in the formula I,

R 1 , R 2 , R 3 and R 4 independently of one another each denote optionally halogenated C 1 - to C 8 -alkyl, or C 5 - to C 6 -cycloalkyl, C 6 - to C 20 -aryl or C 7 - to C 12 -aralkyl, in each case optionally substituted by alkyl and/or halogen,

X in the formula I denotes a mono- or polynuclear aromatic radical having 6 to 30 C atoms,

n in the formula I independently of one another can be 0 or 1,

N represents values from 0 to 30,

(vi) from 0.01 to 5 parts by weight of a mixture if a fibril forming polytetrafluoroethylene polymer and a fluorothermoplast, and

(vii) from 0 to 30 parts by weight of an hypophosphorous acid metal salt, wherein parts by weight are based on the total weight of the ignition resistant carbonate polymer composition.

11. A formed article comprising the ignition resistant carbonate polymer of claim 1 .

12. The formed article of claim 11 is an interior trim for rail vehicle, an interior and/or exterior automotive article, an enclosure for electrical devices containing small transformers, an enclosure for information dissemination and/or transmission device, an enclosure and/or cladding for medical purposes, a message device and/or enclosures therefore, a toy vehicles for children, a sheet wall element, an enclosure for safety equipment, a hatchback spoiler, a thermally insulated transport container, an apparatus for keeping and/or caring for small animals, an article for sanitary and/or bathroom installations, a cover grill for ventilation openings, an article for summer houses and sheds, enclosures for garden appliances and/or an enclosure for: a power tool, an appliance, a TV, a VCR, a DVD player, a web appliance, an electronic book, a telephone, a computer, a monitor, a fax machine, a battery charger, a scanner, a copier, a printer, a hand held computer, or a flat screen display.