Interior train components having low smoke and low heat release, and methods of their manufacture

1. A railway component,

wherein the component is a molded or extruded seat component, comprising a thermoplastic composition comprising, based on the total weight of the composition:

69 to 90 wt. % of a first polymer comprising bisphenol A carbonate units and monoaryl arylate units, and a second polymer comprising bisphenol A carbonate units, monoaryl arylate units, and siloxane units;

10 to 30 wt. % of a polyetherimide;

optionally, up to 5 wt. % of an additive selected from a processing aid, a heat stabilizer, an ultra violet light absorber, a colorant, or a combination comprising at least one of the foregoing; and

optionally, 2 to 12 wt. % of an organophosphorus compound in an amount effective to provide 0.1 to 1.0 wt. % of phosphorus, based on the total weight of the thermoplastic polymer composition,

wherein

the bisphenol A carbonate units are of the formula

the monoaryl arylate units are of the formula

wherein each R h is independently a halogen atom, a C 1-10 hydrocarbyl and n is 0 to 4; and

the siloxane units are of the formula

or a combination comprising at least one of the foregoing, wherein E has an average value of 2 to 90;

wherein a sample of the thermoplastic composition has:

a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

an integral of the smoke density as a function of time up to 4 minutes (VOF4) of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

a maximum average heat release (MAHRE) of equal to or less than 90 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2 , and

a ductility in multiaxial impact of 80% to 100%, measured at 23° C. at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs.

2. The railway component of claim 1 , wherein a sample of the thermoplastic composition has:

a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

an integral of the smoke density as a function of time up to 4 minutes (VOF4) of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

a maximum average heat release (MAHRE) of equal to or less than 60 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2 , and

a ductility in multiaxial impact of 80% to 100%, measured at +23° C. at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs.

3. The railway component of claim 1 , wherein the first polymer comprises:

2 to 20 mol % of bisphenol-A carbonate units,

60 to 98 mol % of isophthalic acid-terephthalic acid-resorcinol ester units of the formula

and

optionally, 1 to 20 mol % resorcinol carbonate units of the formula

isophthalic acid-terephthalic acid-bisphenol-A ester units of the formula

or a combination comprising at least one of the foregoing.

4. The railway component of claim 1 , wherein the first polymer comprises units of the formula

wherein m is 4 to 100, and the mole ratio of x:m is 99:1 to 1:99.

5. The railway component of claim 1 , wherein the second polymer comprises

1 to 40 mol % of the bisphenol A carbonate units,

50 to 95 mol % of the isophthalic acid-terephthalic acid-resorcinol units, and

the siloxane units in an amount effective to provide 0.1 to 10 wt. % of siloxane units, based on the weight of the second polymer, wherein E has an average value of 2 to 50.

6. The railway component of claim 1 , wherein the polyetherimide comprises units of the formula

wherein

R is a C 2-20 hydrocarbon group, and

Z is an aromatic C 6-24 monocyclic or polycyclic group optionally substituted with 1 to 6 C 1-8 alkyl groups, 1 to 8 halogen atoms, or a combination comprising at least one of the foregoing, wherein the divalent bonds of the —O—Z—O— group are in the 3,3′, 3,4′, 4,3′, or the 4,4′ positions.

7. The railway component of claim 6 , wherein R is m-phenylene and Z is 2,2-bis(1′,4′-phenylene)isopropylidene.

8. The railway component of claim 1 , wherein the component is injection molded, and the thermoplastic composition has a melt volume flow rate of equal to or greater than 4 cc/10 min measured at 300° C. under 1.2 kg force measured according to ISO 1133.

9. The railway component of claim 1 , wherein the component is extruded, and the thermoplastic composition has a Vicat B120 of less than 160° C. measured according to ISO 306.

10. The railway component of claim 1 , wherein the organophosphorus compound is an aromatic organophosphorus compound having at least one organic aromatic group and at least one phosphorus-containing group, or an organic compound having at least one phosphorus-nitrogen bond.

11. The railway component of claim 10 , wherein the organophosphorus compound is bisphenol A bis(diphenyl phosphate), triphenyl phosphate, resorcinol bis(diphenyl phosphate), tricresyl phosphate, a phenol/bi-phenol polyphosphate, or a combination comprising at least one of the foregoing.

12. The railway component of claim 10 , wherein organophosphorus compound containing a nitrogen-phosphorus bond is a phosphazene, phosphorus ester amide, phosphoric acid amide, phosphonic acid amide, phosphinic acid amide, tris(aziridinyl) phosphine oxide, a combination comprising at least one of the foregoing.

13. The railway component of claim 1 , wherein no or substantially no flame retarding brominated compounds, flame retardant salts, or a combination comprising at least one of the foregoing are present in the thermoplastic composition.

14. The railway component of claim 1 , wherein the thermoplastic composition further comprises 0.05 to 5.0 wt. % of a light diffuser additive comprising silicone, polymethylsilsesquioxane, crosslinked poly(methyl methacrylate), methyl methacrylate/ethyleneglycol dimethacrylate copolymer, TiO 2 , or a combination comprising at least one of the foregoing.

15. The railway component of claim 1 , wherein the thermoplastic composition further comprises 0.00002 to 5.0 wt. % of one or more colorants based on the total weight of the polymers in the thermoplastic composition.

16. The railway component of claim 1 , wherein the thermoplastic composition comprises, based on the total weight of the composition,

80 to 90 wt. % of a combination comprising, based on the weight of the combination,

20 to 80 wt. % of a poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester) of the formula

wherein m is 4 to 100, and the mole ratio of x:m is 99:1 to 1:99, and

20 to 80 wt. % of a poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane) comprising

1 to 40 mol % of the bisphenol A carbonate units,

50 to 95 mol % of the isophthalic acid-terephthalic acid-resorcinol units, and

the siloxane units in an amount effective to provide 0.1 to 10 wt. % of siloxane units, based on the weight the poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane), wherein E has an average value of 2 to 30;

10 to 20 wt. % of a polyetherimide comprising units of the formula

wherein R is m-phenylene and Z is 2,2-bis(1′,4′-phenylene)isopropylidene;

optionally, 2 to 12 wt. % of bisphenol A bis(diphenyl phosphate); and

optionally, up to 5 wt. % of an additive selected from a processing aid, a heat stabilizer, an ultra violet light absorber, a colorant, or a combination comprising at least one of the foregoing;

wherein a sample of the thermoplastic composition has:

a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

an integral of the smoke density as a function of time up to 4 minutes (VOF4) of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

a maximum average heat release (MAHRE) of equal to or less than 90 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2 , and

a ductility in multiaxial impact of 80% to 100%, measured at 23° C. at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs.

17. The railway component of claim 1 , wherein the thermoplastic composition comprises, based on the weight of the thermoplastic composition,

80 to 90 wt. % of a combination comprising, based on the weight of the combination,

20 to 80 wt. % of a poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester) of the formula

wherein m is 4 to 100, and the mole ratio of x:m is 99:1 to 1:99, and

20 to 80 wt. % of a poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane) comprising,

1 to 40 mol % of the bisphenol A carbonate units,

50 to 95 mol % of the isophthalic acid-terephthalic acid-resorcinol units, and

the siloxane units in an amount effective to provide 0.1 to 10 wt. % of siloxane units, based on the weight of the poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane), wherein E has an average value of 2 to 30;

10 to 20 wt. % of a polyetherimide comprising units of the formula

wherein R is m-phenylene and Z is 2,2-bis(1′,4′-phenylene)isopropylidene;

2 to up to 12 wt. % of bisphenol A bis(diphenyl phosphate); and

optionally, up to 5 wt. % of an additive selected from a processing aid, a heat stabilizer, an ultra violet light absorber, a colorant, or a combination comprising at least one of the foregoing;

wherein a molded sample of the thermoplastic composition has:

a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

an integral of the smoke density as a function of time up to 4 minutes (VOF4) of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

a maximum average heat release (MAHRE) of equal to or less than 60 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2 , and

a ductility in multiaxial impact of 80% to 100%, measured at 23° C. at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs.

18. A railway component,

wherein the component is an extruded or molded interior train cladding comprising a thermoplastic composition comprising, based on the total weight of the composition:

69 to 90 wt. % of a first polymer comprising bisphenol A carbonate units and monoaryl arylate units and a second polymer comprising bisphenol A carbonate units, monoaryl arylate units, and siloxane units;

10 to 30 wt. % of a polyetherimide;

optionally, up to 5 wt. % of an additive selected from a processing aid, a heat stabilizer, an ultra violet light absorber, a colorant, or a combination comprising at least one of the foregoing; and

optionally an organophosphorus compound in an amount effective to provide 0.1 to 1.0 wt. % of phosphorus, based on the total weight of the thermoplastic polymer composition,

wherein

the bisphenol A carbonate units are of the formula

the monoaryl arylate units are of the formula

wherein each R h is independently a halogen atom, a C 1-10 hydrocarbyl and n is 0 to 4; and

the siloxane units are of the formula

or a combination comprising at least one of the foregoing, wherein E has an average value of 2 to 90;

wherein a sample of the thermoplastic composition has:

a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

an integral of the smoke density as a function of time up to 4 minutes (VOF4) of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

a maximum average heat release (MAHRE) of equal to or less than 90 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2 ,

a critical heat flux at extinguishment (CFE) of equal to or greater than 20 kW/m 2 measured in accordance with ISO 5658-2 on a 3 mm thick plaque, and

a ductility in multiaxial impact of 80% to 100%, measured at 23° C. at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs.

19. The railway component of claim 18 ,

wherein a sample of the thermoplastic composition has:

a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

an integral of the smoke density as a function of time up to 4 minutes (VOF4) of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

a maximum average heat release (MAHRE) of equal to or less than 60 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2 ,

a critical heat flux at extinguishment (CFE) of equal to or greater than 20 kW/m 2 measured in accordance with ISO 5658-2 on a 3 mm thick plaque, and

a ductility in multiaxial impact of 80% to 100%, measured at 23° C. at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs.

20. The railway component of claim 18 , wherein the component is injection molded, and the thermoplastic composition has a melt volume flow rate of equal to or greater than 4 cc/10 min measured at 300° C. under 1.2 kg force measured according to ISO 1133.

21. The railway component of claim 18 , wherein the component is extruded, and the thermoplastic composition has a Vicat B120 of less than 160° C. measured according to ISO 306.

22. The railway component of claim 18 , wherein the first polymer comprises:

2 to 20 mol % of bisphenol-A carbonate units,

60 to 98 mol % of isophthalic acid-terephthalic acid-resorcinol ester units of the formula

and

optionally, 1 to 20 mol % resorcinol carbonate units of the formula

isophthalic acid-terephthalic acid-bisphenol-A ester units of the formula

or a combination comprising at least one of the foregoing.

23. The railway component of claim 18 , wherein the first polymer comprises units of the formula

wherein m is 4 to 100, and the mole ratio of x:m is 99:1 to 1:99.

24. The railway component of claim 18 , wherein the second polymer comprises

1 to 40 mol % of the bisphenol A carbonate units,

50 to 95 mol % of the isophthalic acid-terephthalic acid-resorcinol units, and

the siloxane units in an amount effective to provide 0.1 to 10 wt. % of siloxane units, based on the weight of the polymer, wherein E has an average value of 2 to 30.

25. The railway component of claim 18 , wherein the polyetherimide comprises units of the formula

wherein

R is a C 2-20 hydrocarbon group, and

Z is an aromatic C 6-24 monocyclic or polycyclic group optionally substituted with 1 to 6 C 1-8 alkyl groups, 1 to 8 halogen atoms, or a combination comprising at least one of the foregoing, wherein the divalent bonds of the —O—Z—O— group are in the 3,3′, 3,4′, 4,3′, or the 4,4′ positions.

26. The railway component of claim 25 , wherein R is m-phenylene and Z is 2,2-bis(1′,4′-phenylene)isopropylidene.

27. The railway component of claim 18 , wherein the organophosphorus compound is an aromatic organophosphorus compound having at least one organic aromatic group and at least one phosphorus-containing group, or an organic compound having at least one phosphorus-nitrogen bond.

28. The railway component of claim 27 , wherein the organophosphorus compound is bisphenol A bis(diphenyl phosphate), triphenyl phosphate, resorcinol bis(diphenyl phosphate), tricresyl phosphate, a phenol/bi-phenol polyphosphate, or a combination comprising at least one of the foregoing.

29. The railway component of claim 27 , wherein organophosphorus compound containing a nitrogen-phosphorus bond is a phosphazene, phosphorus ester amide, phosphoric acid amide, phosphonic acid amide, phosphinic acid amide, tris(aziridinyl) phosphine oxide, a combination comprising at least one of the foregoing.

30. The railway component of claim 18 , wherein no or substantially no flame retarding brominated compounds, flame retardant salts, or a combination comprising at least one of the foregoing are present in the thermoplastic composition.

31. The railway component of claim 18 , wherein the thermoplastic composition further comprises 0.05 to 5.0 wt. % of a light diffuser additive comprising silicone, polymethylsilsesquioxane, crosslinked poly(methyl methacrylate), methyl methacrylate/ethyleneglycol dimethacrylate copolymer, TiO 2 , or a combination comprising at least one of the foregoing.

32. The railway component of claim 18 , wherein the thermoplastic composition further comprises 0.00002 to 5.0 wt. % of a colorant based on the total weight of the polymers in the thermoplastic composition.

33. The railway component of claim 18 , wherein the thermoplastic composition comprises, based on the total weight of the composition,

80 to 90 wt. % of a combination comprising, based on the weight of the combination,

20 to 80 wt. % of a poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester) of the formula

wherein m is 4 to 100, and the mole ratio of x:m is 99:1 to 1:99, and

20 to 80 wt. % of a poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane) comprising,

1 to 40 mol % of bisphenol A carbonate units,

50 to 95 mol % of isophthalic acid-terephthalic acid-resorcinol units, and

the siloxane units present in an amount effective to provide 0.1 to 10 wt. % of the siloxane units, based on the weight of the poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane), wherein E has an average value of 2 to 30; and

10 to 20 wt. % of a polyetherimide comprising units of the formula

R is m-phenylene and Z is 2,2-bis(1′,4′-phenylene)isopropylidene;

0 to up to 12 wt. % of bisphenol A bis(diphenyl phosphate); and

optionally, up to 5 wt. % of an additive selected from a processing aid, a heat stabilizer, an ultra violet light absorber, a colorant, or a combination comprising at least one of the foregoing;

wherein a sample of the thermoplastic composition has:

a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

an integral of the smoke density as a function of time up to 4 minutes (VOF4) of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

a maximum average heat release (MAHRE) of equal to or less than 90 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2 ,

a critical heat flux at extinguishment (CFE) of equal to or greater than 20 kW/m 2 measured in accordance with ISO 5658-2 on a 3 mm thick plaque, and

a ductility in multiaxial impact of 80% to 100%, measured at 23° C. at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs.

34. The railway component of claim 18 , wherein the thermoplastic composition comprises, based on the total weight of the thermoplastic composition,

80 to 90 wt. % of a combination comprising, based on the weight of the combination,

20 to 80 wt. % of a poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester) of the formula

wherein m is 4 to 100, and the mole ratio of x:m is 99:1 to 1:99, and

20 to 80 wt. % of a poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane) comprising,

1 to 40 mol % of bisphenol A carbonate units,

50 to 95 mol % of isophthalic acid-terephthalic acid-resorcinol units, and

the siloxane units are present in an amount effective to provide 0.1 to 10 wt. % of siloxane units, based on the weight of the poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane), wherein E has an average value of 2 to 30;

10 to 20 wt. % of a polyetherimide comprising units of the formula

R is m-phenylene and Z is 2,2-bis(1′,4′-phenylene)isopropylidene;

2 to up to 12 wt. % of bisphenol A bis(diphenyl phosphate); and

optionally, up to 5 wt. % of an additive selected from a processing aid, a heat stabilizer, an ultra violet light absorber, a colorant, or a combination comprising at least one of the foregoing, wherein a sample of the thermoplastic composition has:

a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

an integral of the smoke density as a function of time up to 4 minutes (VOF4) of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

a maximum average heat release (MAHRE) of equal to or less than 60 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2 ,

a critical heat flux at extinguishment (CFE) of equal to or greater than 20 kW/m 2 measured in accordance with ISO 5658-2 on a 3 mm thick plaque, and

a ductility in multiaxial impact of 80% to 100%, measured at 23° C. at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs.

35. The railway component of claim 18 , wherein the cladding is an interior vertical surface selected from room dividers, flaps, boxes, hoods and louvres; an interior door or lining for internal and external doors; a window insulation; a kitchen interior surface; an interior horizontal surface selected from ceiling paneling, flaps, boxes, hoods and louvres; a luggage storage area selected from overhead and vertical luggage racks, luggage containers and compartments; a driver's desk application selected from paneling and surfaces of driver's desk; an interior surface of gangways selected from interior sides of gangway membranes (bellows) and interior linings; a window frame; an optionally folding table with downward facing surface; an interior or exterior surface of air ducts, or a device for passenger information.

36. The railway component of claim 35 , wherein the cladding is a side wall, a front wall, an end-wall, a partition, a room divider, an interior door, a window insulation, a lining, a kitchen interior surface, a ceiling panel, an overhead or vertical luggage rack, a luggage container, a luggage compartment, a window frame, an optionally folding table with downward facing surface, or an information display screen.

37. The railway component of claim 18 , wherein the component is a partition, a room divider, an interior door or lining for internal and external doors, a window insulation, an overhead and vertical luggage rack, a luggage container and compartment, a window frame, an optionally folding table with downward facing surface; or a device for passenger information, wherein the thermoplastic composition comprises a light diffuser additive comprising silicone, polymethylsilsesquioxane, crosslinked poly(methyl methacrylate), methyl methacrylate/ethyleneglycol dimethacrylate copolymer, TiO 2 , or a combination comprising at least one of the foregoing.

38. A railway component

wherein the component is a molded or extruded seat component or a molded or extruded interior train cladding, comprising a thermoplastic composition comprising, based on the total weight of the composition,

58 to 95 wt. % of a poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane) which comprises

1 to 40 mol % of bisphenol A carbonate units,

50 to 95 mol % of isophthalic acid-terephthalic acid-resorcinol units, and

the siloxane units present in an amount effective to provide 0.1 to 10 wt. % of the siloxane units, based on the weight of the poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane);

5 to 30 wt. % of a polyetherimide comprising units of the formula

wherein R is m-phenylene and Z is 2,2-bis(1′,4′-phenylene)isopropylidene;

0 to up to 12 wt. % of bisphenol A bis(diphenyl phosphate); and

optionally, up to 5 wt. % of an additive selected from a processing aid, a heat stabilizer, an ultra violet light absorber, a colorant, or a combination comprising at least one of the foregoing;

wherein

the bisphenol A carbonate units are of the formula

the isophthalic acid-terephthalic acid-resorcinol units are of the formula

and

the siloxane units are of the formula

or a combination comprising at least one of the foregoing, wherein E has an average value of 2 to 90;

wherein a sample of the thermoplastic composition has:

a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

an integral of the smoke density as a function of time up to 4 minutes (VOF4) of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

a maximum average heat release (MAHRE) of equal to or less than 90 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2 , and

a ductility in multiaxial impact of 80% to 100%, measured at 23° C. at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs.

39. The railway component of claim 38 , wherein the thermoplastic composition comprises, based on the weight of the thermoplastic composition,

58 to 93 wt. % of the poly(bisphenol-A carbonate)-co-poly(isophthalate-terephthalate-resorcinol ester)-co-poly(siloxane);

and

5 to 30 wt. % of the polyetherimide;

2 to up to 12 wt. % of bisphenol A bis(diphenyl phosphate); and

optionally, up to 5 wt. % of an additive selected from a processing aid, a heat stabilizer, an ultra violet light absorber, a colorant, or a combination comprising at least one of the foregoing;

wherein a molded sample of the thermoplastic composition has:

a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

an integral of the smoke density as a function of time up to 4 minutes (VOF4) of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2 ,

a maximum average heat release (MAHRE) of equal to or less than 60 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2 , and

a ductility in multiaxial impact of 80% to 100%, measured at 23° C. at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs.