Modified fluoroplastic composition and modified fluoroplastic molded article
View Patent ↗A modified fluoroplastic composition contains a first unmodified fluoroplastic prepared by applying ionizing radiation to the fluoroplastic heated at the melting point or a higher temperature under an inert gas atmosphere, a second unmodified fluoroplastic, and a polyamide-imide resin.
1. A modified fluoroplastic composition, comprising:
a modified fluoroplastic prepared by applying ionizing radiation to a first unmodified fluoroplastic heated at the melting point or a higher temperature under an inert gas atmosphere;
a second unmodified fluoroplastic; and
a polyamide-imide resin.
2. The modified fluoroplastic composition as defined in claim 1 , wherein:
the weight of the modified fluoroplastic is 5 parts by weight to 50 parts by weight of the overall weight of the modified fluoroplastic composition, the weight of the polyamide-imide resin is 5 parts by weight to 20 parts by weight of the overall weight of the modified fluoroplastic composition; and
the sum weight of the modified fluoroplastic and the polyamide-imide resin is 10 parts by weight to 60 parts by weight of the overall weight of the modified fluoroplastic composition.
3. The modified fluoroplastic composition as defined in claim 1 , wherein:
the first or second unmodified fluoroplastic is a tetrafluoroethylene-based polymer, further comprising 1 mol % or less of a heterogeneous fluoromonomer.
4. The modified fluoroplastic composition as defined in claim 1 , wherein:
the modified fluoroplastic has 40 J/g or less heat of crystallization, and 325° C. or less melting point.
5. The modified fluoroplastic composition as defined in claim 1 , wherein:
the modified fluoroplastic is prepared by applying ionizing radiation to a first unmodified fluoroplastic heated at the melting point or a higher temperature under an inert gas atmosphere having a 10 torr or less oxygen concentration within a range of irradiation doses of from 1 KGy to 10 MGy.
6. The modified fluoroplastic composition as defined in claim 5 , wherein:
the higher temperature ranges from 10 to 30° C. above the melting point.
7. The modified fluoroplastic composition as defined in claim 6 , wherein:
the fluoroplastic is a tetrafluoroethylene-based polymer heated at a temperature ranging from 327° C. to 357° C.
8. The modified fluoroplastic composition as defined in claim 6 , wherein:
the fluoroplastic is a tetrafluoroethylene-perfluoro(alkyl vinyl ether)-based copolymer heated at a temperature ranging from 310° C. to 340° C.
9. The modified fluoroplastic composition as defined in claim 6 , wherein:
the fluoroplastic is a tetrafluoroethylene-hexafluoropropylene-based copolymer heated at a temperature ranging from 275° C. to 305° C.
10. The modified fluoroplastic composition as defined in claim 1 , wherein the second unmodified fluoroplastic comprises a tetrafluoroethylene-based polymer.
11. The modified fluoroplastic composition as defined in claim 10 , wherein the tetrafluoroethylene-based polymer contains 0.2 mol % or less of a polymeric unit derived from a copolymerizable monomer selected from the group consisting of perfluoro(alkyl vinyl ether), hexafluoropropylene, (perfluorolakyl)ethylene, and chlorotrifluoroethylene.
12. The modified fluoroplastic composition as defined in claim 1 , wherein the first unmodified fluoroplastic comprises a tetrafluoroethylene-perfluoro(alkyl vinyl ether)-based copolymer.
13. The modified fluoroplastic composition as defined in claim 12 , wherein the tetrafluoroethylene-perfluoro(alkyl vinyl ether)-based copolymer further contains 0.2 mol % or less of a polymeric unit derived from a copolymerizable monomer selected from the group consisting of, hexafluoropropylene, (perfluorolakyl)ethylene, and chlorotrifluoroethylene.
14. The modified fluoroplastic composition as defined in claim 1 , wherein the first unmodified fluoroplastic comprises a tetrafluoroethylene-hexafluoropropylene-based copolymer.
15. The modified fluoroplastic composition as defined in claim 14 , wherein the tetrafluoroethylene-hexafluoropropylene-based further contains 0.2 mol % or less of a polymeric unit derived from a copolymerizable monomer selected from the group consisting of perfluoro(alkyl vinyl ether), (perfluorolakyl)ethylene, and chlorotrifluoroethylene.
16. The modified fluoroplastic composition as defined in claim 1 , wherein the first unmodified fluoroplastic comprises a tetrafluoroethylene-based polymer.
17. The modified fluoroplastic composition as defined in claim 16 , wherein the tetrafluoroethylene-based polymer contains 0.2 mol % or less of a polymeric unit derived from a copolymerizable monomer selected from the group consisting of perfluoro(alkyl vinyl ether), hexafluoropropylene, (perfluorolakyl)ethylene, and chlorotrifluoroethylene.
18. The modified fluoroplastic composition as defined in claim 1 , wherein the second unmodified fluoroplastic comprises a tetrafluoroethylene-perfluoro(alkyl vinyl ether)-based copolymer.
19. The modified fluoroplastic composition as defined in claim 18 , wherein the tetrafluoroethylene-perfluoro(alkyl vinyl ether)-based copolymer further contains 0.2 mol % or less of a polymeric unit derived from a copolymerizable monomer selected from the group consisting of (perfluorolakyl)ethylene, and chlorotrifluoroethylene.
20. The modified fluoroplastic composition as defined in claim 1 , wherein the second unmodified fluoroplastic comprises a tetrafluoroethylene-hexafluoropropylene-based copolymer.
21. The modified fluoroplastic composition as defined in claim 20 , wherein the tetrafluoroethylene-hexafluoropropylene-based copolymer further contains 0.2 mol % or less of a polymeric unit derived from a copolymerizable monomer selected from the group consisting of perfluoro(alkyl vinyl ether), hexafluoropropylene, (perfluorolakyl)ethylene, and chlorotrifluoroethylene.
22. A modified fluoroplastic molded article, comprising:
a modified fluoroplastic composition molded into a predetermined shape; and
the modified fluoroplastic composition comprising
a modified fluoroplastic prepared by applying ionizing radiation to a first unmodified fluoroplastic heated at the melting point or a higher temperature under an inert gas atmosphere;
a second unmodified fluoroplastic; and
a polyamide-imide resin.
23. The modified fluoroplastic article as defined in claim 22 , wherein:
the modified fluoroplastic composition contains further a solid lubricant selected from the group consisting of molybdenum disulfide, and graphite.