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US 6,133,389 AGranted
Amorphous tetrafluoroethylene-hexafluoropropylene copolymers
AssigneeE. I. Du Pont de Nemours and Company
InventorsColin Anolick, Viacheslav Alexandrovich Petrov, Bruce Edmund Smart, Charles Winfield Stewart, Robert Clayton Wheland, William Brown Farnham, Andrew Edward Feiring, Weiming Qiu
Life of this patent
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Abstract
Disclosed herein are novel amorphous tetrafluoroethylene-hexafluoropropylene (TFE-HFP) dipolymers, and other copolymers containing TFE, HFP and a third monomer, many of which are more random than previous amorphous TFE-HFP copolymers, as well as a novel high productivity continuous process for making these polymers. The polymers are particularly useful in the form of coatings, films and encapsulants.
Claims11
A film comprising a polymer selected from the group consisting of:
- (A) an amorphous polymer, consisting essentially of, repeat units of the formula:
- (i) at least about 30 mole percent of
- --CF(CF.sub.3)--CF.sub.2 -- (I)
- (ii) at least about 1 mole percent
- --CF.sub.2 --CF.sub.2 -- (II)
- (iii) 0 to about 10 mole percent ##STR2## wherein X is --C.sub.n F.sub.2n+1 or --OC.sub.n F.sub.2n+1, m is 2, 3 or 4, and n is an integer of 2 to 20, with --C.sub.n F.sub.2n+1 or an integer of 1 to 20 with --OC.sub.n F.sub.2n+1 ;
- and
- provided that in said polymer less than 20 mole percent of (I) is present in the form of triads;
- and;
- (B) an amorphous polymer containing repeat units derived from:
- 2- 60mole percent hexafluoropropylene, up to 35 mole percent total of one or more second monomers, and the balance tetrafluoroethylene, provided that at least one mole percent of TFE is present in the polymer, and wherein said second monomer is ethylene, vinyl fluoride, trifluoroethylene, 3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene, 4-bromo-3,3,4,4-tetrafluoro-1-butene, ethylene CH.sub.2 .dbd.CHO(C.dbd.O)R.sup.2 wherein R.sup.2 is perfluoro-n-alkyl containing 1 to 8 carbon atoms, CH.sub.2 .dbd.CHR.sup.3 wherein R.sup.3 is perfluoro-n-alkyl containing 1 to 8 carbon atoms, CH.sub.2 .dbd.CH(C.dbd.O)OR.sup.4 wherein R.sup.4 is C.sub.n F.sub.x H.sub.y wherein x+y=2n+1 and n is 1 to 8, chlorotrifluoroethylene, or allyltrimethoxysilane, and provided that at least some of said repeat units derived from said second monomer are present;
- or
- 27-60 mole percent hexafluoropropylene, up to 5 mole percent total of one or more fourth monomers and the balance tetrafluoroethylene, provided that the polymer contains at least 1 mole percent tetrafluoroethylene, wherein said fourth monomer is perfluorocyclopentene, perfluorocyclobutene, CF.sub.2 .dbd.CFCF.sub.2 CN, CF.sub.2 .dbd.CFR.sup.5 wherein R.sup.5 is perfluoroalkyl optionally containing one or more of one or more ether groups, one cyano group, or one sulfonyl fluoride group, perfluoro(2-metylene-4-methyl-1,3-dioxolane), perfluoro(2-methyl-2,3-dihydro-1,4-dioxin), or FSO.sub.2 CF.sub.2 CF.sub.2 OCF(CF.sub.3)CF.sub.2 OCF.dbd.CF.sub.2, and provided that at least some of said repeat units derived from said fourth monomer are present;
- or
- 27-60 mole percent hexafluoropropylene, up to 30 mole percent total of one or more second monomers and up to 5 mole percent total of one or more fourth monomers, and the balance tetrafluoroethylene, provided that the polymer contains at least 1 mole percent tetrafluoroethylene, and further provided that at least some repeat units derived from said second monomer and said fourth monomer are present.
12 more elements
A coating of a polymer selected from the group consisting of
- (A) an amorphous polymer, consisting essentially of, repeat units of the formula:
- (i) at least about 30 mole percent of
- --CF(CF.sub.3)--CF.sub.2 -- (I)
- (ii) at least about 1 mole percent
- --CF.sub.2 --CF.sub.2 -- (II)
- (iii) 0 to about 10 mole percent ##STR3## wherein X is --C.sub.n F.sub.2n+1 or -OC.sub.n F.sub.2n+1, m is 2, 3 or 4 and n is an integer of 2 to 20, with C.sub.n F.sub.2n+1 or an integer of 1 to 20 with --OC.sub.n F.sub.2n+1 ;
- and
- provided that in said polymer less than 20 mole percent of (I) is present in the form of triads;
- and;
- (B) an amorphous polymer containing repeat units derived from:
- 27-60 mole percent hexafluoropropylene, up to 35 mole percent total of one or more second monomers, and the balance tetrafluoroethylene, provided that at least one mole percent of TFE is present in the polymer, and wherein said second monomer is ethylene, vinyl fluoride, trifluoroethylene, 3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene, 4-bromo-3,3,4,4-tetrafluoro-1-butene, ethylene CH.sub.2 .dbd.CHO(C.dbd.O)R.sup.2 wherein R.sup.2 is perfluoro-n-alkyl containing 1 to 8 carbon atoms, CH.sub.2 .dbd.CHR.sup.3 wherein R.sup.3 is perfluoro-n-alkyl containing 1 to 8 carbon atoms, CH.sub.2 .dbd.CH(C.dbd.O)OR.sup.4 wherein R.sup.4 is C.sub.n F.sub.x H.sub.y wherein x+y=2n+1 and n is 1 to 8, chlorotrifluoroethylene, or allyltrimethoxysilane, and provided that at least some of said repeat units derived from said second monomer are present;
- or
- 27-60 mole percent hexafluoropropylene, up to 5 mole percent total of one or more fourth monomers and the balance tetrafluoroethylene, provided that the polymer contains at least 1 mole percent tetrafluoroethylene, wherein said fourth monomer is perfluorocyclopentene, perfluorocyclobutene, CF.sub.2 .dbd.CFCF.sub.2 CN, CF.sub.2 .dbd.CFR.sup.5 wherein R.sup.5 is perfluoroalkyl optionally containing one or more of one or more ether groups, one cyano group, or one sulfonyl fluoride group, perfluoro(2-methylene-4-methyl-1,3-dioxolane), perfluoro(2-methyl-2,3-dihydro-1,4-dioxin), or FSO.sub.2 CF.sub.2 CF.sub.2 OCF(CF.sub.3)C.sub.2 OCF.dbd.CF.sub.2, and provided that at least some of said repeat units derived from said fourth monomer are present;
- or
- 27-60 mole percent hexafluoropropylene, up to 30 mole percent total of one or more second monomers and up to 5 mole percent total of one or more fourth monomers, and the balance tetrafluoroethylene, provided that the polymer contains at least 1 mole percent tetrafluoroethylene, and further provided that at least some repeat units derived from said second monomer and said fourth monomer are present.
12 more elements
Dependencies are inferred from the claim text.