IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0774154
(2004-02-06)
|
| 우선권정보 |
EP-0075848 (2003-03-25) |
| §371/§102 date |
20040408
(20040408)
|
|
발명자
/ 주소 |
- Kaspar, Harald
- Hintzer, Klaus
- Zipplies, Tilman
- Kaulbach, Ralph
|
| 출원인 / 주소 |
- 3M Innovative Properties Company
|
| 인용정보 |
피인용 횟수 :
17 인용 특허 :
12 |
초록
▼
The present invention provides a fluoropolymer that is melt-processible and thermoplastic and that has a melting point between 100° C. and 320° C. The fluoropolymer is derived from (a) one or more gaseous fluorinated monomers, (b) one or more modifiers selected from (i) olefins having a bromine or i
The present invention provides a fluoropolymer that is melt-processible and thermoplastic and that has a melting point between 100° C. and 320° C. The fluoropolymer is derived from (a) one or more gaseous fluorinated monomers, (b) one or more modifiers selected from (i) olefins having a bromine or iodine atom bonded to a carbon of the double bond of the olefin, (ii) olefins corresponding to formula (I):Xa2C?CXa?Rf?Br??(I)wherein each Xa independently represents hydrogen, fluorine, bromine, chlorine or iodine, Rf is a perfluoroalkylene group, typically having 1 to 8 carbon atoms, a perfluorooxyalkylene group or a perfluoropolyether group and (iii) mixtures thereof; and (c) optionally one or more comonomers selected from non-gaseous fluorinated monomers and non-fluorinated monomers. The resulting fluoropolymer has long chain branches. The invention further provides a method for making these polymers.
대표청구항
▼
1. A composition comprising a fluoropolymer that is melt-processible and thermoplastic and that has a melting point between 100° C. and 320° C., said fluoropolymer having long chain branches and being derived from (a) one or more gaseous fluorinated monomers, (b) one or more modifiers selected from
1. A composition comprising a fluoropolymer that is melt-processible and thermoplastic and that has a melting point between 100° C. and 320° C., said fluoropolymer having long chain branches and being derived from (a) one or more gaseous fluorinated monomers, (b) one or more modifiers selected from (i) olefins having a bromine or iodine atom bonded to a carbon of the double bond of the olefin, (ii) olefins corresponding to formula (I):Xa2C?CXa?Rf?Br??(I) wherein each Xa independently represents hydrogen, fluorine, bromine, chlorine or iodine, Rf is a perfluoroalkylene group, a perfluorooxyalkylene group or a perfluoropolyether group and (iii) mixtures thereof; and (c) optionally one or more comonomers selected from non-gaseous fluorinated monomers and non-fluorinated monomers.2. A composition according to claim 1, wherein said gaseous fluorinated monomers are selected from tetrafluoroethylene, vinylidene fluoride, chlorotrifluoroethylene, hexafluoropropylene, perfluorovinyl ethers and mixtures thereof.3. A composition according to claim 1 wherein said olefin having a bromine or iodine atom bonded to a carbon of the double bond of the olefin corresponds to the general formula:X2C?CXZ??(I) wherein each X may be the same or different and is selected from the group consisting of hydrogen, F, Cl, Br and I, with the proviso that at least one X represents Br or I, Z represents hydrogen, F, Cl, Br, I, a perfluoroalkyl group, a perfluoroalkoxy group or a perfluoropolyether group.4. A composition according to claim 1 wherein X is selected from hydrogen, F and Br with the proviso that at least one X represents Br and Z is hydrogen, F, Br, a perfluoroalkyl group or a perfluoroalkoxy group.5. A composition according to claim 1 wherein said fluoropolymer is a perfluorinated polymer.6. A composition according to claim 1 wherein said fluoropolymer comprises units deriving from tetrafluoroethylene and hexafluoropropylene or comprises units deriving from tetrafluoroethylene and a perfluorinated vinyl ether.7. A method comprising extruding a fluoropolymer as defined in claim 1.8. A method according to claim 7 wherein said fluoropolymer is extruded as a coating onto a wire or a cable.9. Method for making a fluoropolymer that is melt-processible and thermoplastic and that has a melting point between 100° C. and 320° C., comprising polymerization (a) one or more gaseous fluorinated monomers with (b) one or more modifiers selected from (i) olefins having a bromine or iodine atom bonded to a carbon of the double bond of the olefin, (ii) olefins corresponding to formula (I):Xa2C?CXa?Rf?Br??(I) wherein each Xa independently represents hydrogen, fluorine, bromine, chlorine or iodine, Rf is a perfluoroalkylene group, a perfluorooxyalkylene group or a perfluoropolyether group and (iii) mixtures thereof; and (c) optionally one or more comonomers selected from non-gaseous fluorinated monomers and non-fluorinated monomers, whereas the amounts of said gaseous fluorinated monomers and optional comonomers are selected such so as to obtain a melt-processible thermoplastic fluoropolymer having a melting point between 100 and 320° C. and wherein said one or more modifiers are used in an amount of not more than 0.3% by weight based on the total weight of monomers fed to the polymerization.10. Method according to claim 9 wherein the resulting fluoropolymer is a perfluoropolymer and wherein subsequent to the polymerization, the resulting perfluoropolymer is subjected to a fluorination step.
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