Filled perfluoropolymer composition
View Patent ↗The present invention relates to plenum cables jacketed with a composition comprising perfluoropolymer, inorganic char-forming agent, and hydrocarbon polymer, which passes the NFPA-255 burn test.
1. A composition consisting essentially of perfluoropolymer, about 10-60 wt % char-forming inorganic agent, and about 0.1 to 5 wt % hydrocarbon polymer that is thermally stable at the melting temperature of said perfluoropolymer, to total 100 wt % based on the combined weight of said perfluoropolymer, agent and hydrocarbon polymer.
2. Melt-fabricated article of the composition of claim 1 .
3. The melt fabricated article of claim 2 wherein said hydrocarbon polymer disperses said agent in said perfluoropolymer.
4. Cable jacket, tubing, profiles and tape of the melt-fabricated article of claim 2 .
5. Pellets of the composition of claim 1 .
6. The composition of claim 1 wherein said agent is in the form of particles having a mean particle size of no greater than about 3 micrometer.
7. The composition of claim 1 wherein said agent is metal oxide.
8. The composition of claim 7 wherein said metal oxide is ZnO.
9. A composition comprising perfluoropolymer, about 10-60wt% char-forming inorganic agent, and about 0.1 to 5 wt% hydrocarbon polymer that is thermally stable at the melting temperature of said perfluoropolymer, to total 100 wt% based on the combined weight of said perfluoropolymer, agent and hydrocarbon polymer, wherein said hydrocarbon polymer is thermoplastic elastomer.
10. The composition of claim 9 wherein said thermoplastic elastomer contains aromatic moiety.
11. A composition comprising perfluoropolymer, about 10-60 wt% char-forming inorganic agent, and about 0.1 to 5 wt% hydrocarbon polymer that is thermally stable at the melting temperature of said perfluoropolymer, to total 100 wt% based on the combined weight of said perfluoropolymer, agent and hydrocarbon polymer, wherein said composition is free of added antioxidant.
12. The composition of claim 1 exhibiting an acid generation of no greater than about 5% and an acidity characterized by a pH of at least about 2.5 determined in accordance with MIL C-24643.
13. The composition of claim 1 further comprising an inorganic phosphor in an effective amount to color said composition when subjected to excitation radiation.
14. The composition of claim 1 wherein said agent is ceramic microspheres.
15. The composition of claim 1 wherein said agent comprises a plurality of char-forming agents, at least one of which is ceramic microspheres.
16. Process comprising melt fabricating the composition of claim 1 and obtaining as a result thereof a dispersion of said agent in said perfluoropolymer.
17. The composition of claim 1 wherein said composition contains 20 to 50 wt% of said char-forming agent.
18. The composition of claim 1 wherein said composition contains 0.5 to 3 wt% of said hydrocarbon polymer.
19. The composition of claim 13 wherein the amount of said inorganic phosphor is 0.1 to 5 wt% based on the combined weight of said perfluoropolymer, char-forming agent, hydrocarbon polymer and inorganic phosphor.
20. The composition of claim 1 wherein said composition contains 20 to 50 wt% of said char-forming agent and 0.5 to 3 wt% of said hydrocarbon polymer.