Fire resistant, high flow poly(aryl ether sulfone) composition
Polymer composition (C) containing (i) a poly(aryl ether sulfone) material (M12) composed of a poly(biphenyl ether sulfone) (P1) and, optionally in addition, a poly(aryl ether sulfone) (P2) containing recurring units with arylene groups linked to each other via a secondary, ternary or quaternary carbon atom, and (ii) a per(halo)fluoropolymer material (M34), composed of a per(halo)fluoropolymer (P3) of which at least 2.0 wt. % of the recurring units are derived from a per(halo)fluoromonomer other than tetrafluoroethylene, and a polytetrafluoroethylene (P4). Shaped article, especially aircraft interior component, comprising the polymer composition (C).
1. A polymer composition (C), comprising:
more than 75 wt. % and below 98 wt. %, based on the total weight of the polymer composition (C), of a poly(aryl ether sulfone) material (M12) consisting of at least one poly(biphenyl ether sulfone) (P1), and
and
0.1 to 5 wt. %, based on the total weight of the polymer composition (C), of a per(halo)fluoropolymer material (M34) consisting of:
55 to 75 wt. %, based on the total weight of the per(halo)fluoropolymer material (M34), of at least one per(halo)fluoropolymer (P3) of which at least 2.0 wt. % of the recurring units are recurring units (R3) derived from at least one per(halo)fluoromonomer other than tetrafluoroethylene, and
45 to 25 wt. %, based on the total weight of the per(halo)fluoropolymer material (M34), of at least one polytetrafluoroethylene (P4).
2. The polymer composition according to claim 1 , wherein the weight of the poly(aryl ether sulfone) material (M12), based on the total weight of polymer composition (C), ranges between 90% and 98 wt. %.
3. The polymer composition according to claim 1 , wherein essentially all the recurring units of the at least one poly(biphenyl ether sulfone) (P1) are recurring units (R1) of formula:
4. The polymer composition according to claim 1 , wherein the weight of the per(halo)fluoropolymer material (M34), based on the total weight of polymer composition (C), is 2.0-5.0 wt. %.
5. The polymer composition according to claim 1 , wherein the per(halo)fluoropolymer (P3) is a copolymer essentially all the recurring units of which are a mix composed of from 7.0% to 20 wt. % of recurring units (R3) derived from perfluoromethylvinylether and at from 80% to 93.0% of recurring units derived from tetrafluoroethylene.
6. The polymer composition according to claim 1 , wherein the polymer composition (C) further comprises titanium dioxide.
7. A shaped article comprising the polymer composition according to claim 1 .
8. The shaped article according to claim 7 , which is an aircraft interior component.
9. The shaped article according to claim 8 , wherein the aircraft interior component is selected from the group consisting of overhead passenger service units, window reveals, air return grills, wall panels, overhead storage lockers, serving trays, seat backs, cabin partitions, and ducts.
10. An aircraft comprising the shaped article according to claim 7 .
11. The polymer composition according to claim 1 , wherein per(halo)fluoropolymer (P3) is melt-processable and per(halo)fluoropolymer (P4) is nonmelt-processable.
12. The polymer composition according to claim 1 , which comprises 0.1-4 wt. %, based on the total weight of the polymer composition (C), of the per(halo)fluoropolymer material (M34).