IPC분류정보
국가/구분 |
United States(US) Patent
공개
|
국제특허분류(IPC7판) |
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출원번호 |
US-0874753
(2001-06-05)
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공개번호 |
US-0022997
(2003-01-30)
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발명자
/ 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
0 |
초록
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A moldable, extrudable, thermally crosslinkable composition of matter containing 50-99% by weight fluoropolymers, in which 50-95% of the polymer content of the blend is an FKM fluoroelastomer and 5-50% of the polymer content of the blend is one or more thermoplastic PVDF polymers or copolymers conta
A moldable, extrudable, thermally crosslinkable composition of matter containing 50-99% by weight fluoropolymers, in which 50-95% of the polymer content of the blend is an FKM fluoroelastomer and 5-50% of the polymer content of the blend is one or more thermoplastic PVDF polymers or copolymers containing at least 70% by weight vinylidene fluoride monomer units, and the crosslinked articles derived from processing and curing the subject composition of matter.
대표청구항
▼
1. A moldable, extrudable, thermally crosslinkable composition of matter blend comprising about 50-99% by weight fluoropolymers, in which about 50-95% of the polymer content of the blend is an FKM fluoroelastomer and about 5-50% of the polymer content of the blend is one or more thermoplastic PVDF p
1. A moldable, extrudable, thermally crosslinkable composition of matter blend comprising about 50-99% by weight fluoropolymers, in which about 50-95% of the polymer content of the blend is an FKM fluoroelastomer and about 5-50% of the polymer content of the blend is one or more thermoplastic PVDF polymers or copolymers containing at least about 70% by weight vinylidene fluoride monomer units, and the crosslinked articles derived from processing and curing the subject composition of matter. 2. The composition of claim 1 comprising one or more PVDF/HFP copolymers at a total level between 10-45% by weight of the polymer content of the blend. 3. The composition of claim 1 comprising a PVDF/CTFE copolymer at a level between 10-45% by weight of the polymer content of the blend. 4. The composition of claim 2 comprising a PVDF/HFP copolymer at a level between 10-44.5% by weight of the polymer content of the blend and a minor portion of a PVDF/CTFE copolymer at a level between 0.5-5% of the polymer content of the blend. 5. The composition of claim 2 comprising a PVDF/HFP copolymer at a level between 10-44.5% by weight of the polymer content of the blend and a minor portion of a THV copolymer with a melting temperature below 150° C., at a level between 0.5-5% of the polymer content of the blend. 6. The composition of claim 1 further comprising one or more platy fillers selected from the group of such fillers consisting of mica, talc, clay, and delaminated graphite, to accomplish a low-permeability composition. 7. The composition of claim 6 wherein said platy filler is composed at least in part of mica, talc, or clay which has been treated with an aminosilane. 8. The composition of claim 2 comprising a PVDF/HFP copolymer at a level between 10-45% by weight of the polymer content of the blend, optionally a fluoroplastic processing aid at a level up to 5% by weight of the polymer, with the balance of the polymeric portion of the composition consisting of a high-fluorine FKM polymer, containing at least 71% by weight fluorine. 9. The composition of claim 1, further comprising at least two conductive fillers of different size and shape, to accomplish electrical resistivity below 106ohm-cm. 10. The composition of claim 9 wherein the conductive fillers comprise 2-4% by volume of a platy conductive filler selected from the group consisting of graphite powder, metal-coated mica, and metal flakes, plus 5-8% by volume of an electrically conductive carbon black which has at most 120 m2/gram BET surface area. 11. The composition of claim 8 wherein the conductive fillers comprise 2-4% by volume of a platy conductive filler selected from the group consisting of graphite powder, metal-coated mica, and metal flakes, plus 5-8% by volume of an electrically conductive carbon black which has at most 120 m2/gram BET surface area. 12. The composition of claim 9 further comprising a platy filler selected from the group consisting of mica, talc, clay, and delaminated graphite. 13. The composition of claim 10 further comprising a platy filler sele cted from the group consisting of mica, talc, clay, and delaminated graphite. 14. The composition of claim 12 in which said platy filler is composed at least in part of mica, talc, or clay which has been treated with an aminosilane. 15. The composition of claim 13 in which said platy filler is composed at least in part of mica, talc, or clay which has been treated with an aminosilane. 16. The composition of claim 1 further comprising at least one type of oligomeric poly-CTFE as a processing aid. 17. The composition of claim 8 further comprising an oligomeric poly-CTFE. 18. The composition of claim 1 wherein the FKM is a peroxide-crosslinkable elastomer, and the composition further comprises a free radical generating initiator and optionally a coagent. 19. The composition of claim 17 wherein the FKM is a peroxide-crosslinkable low-temperature FKM elastomer. 20. The composition of claim 19 wherein the FKM is a labile iodine-containing peroxide-crosslinkable FKM elastomer. 21. The composition of claim 20 wherein the FKM is a high-fluorine material with greater than 72% combined fluorine by weight. 22. The composition of claim 16 further comprising about 0.2-4 parts of a zinc salt of one or several fatty acids. 23. The composition of claim 5 comprising a PVDF/HFP copolymer at a level between 10-44.5% by weight of the polymer content of the blend, a conductive carbon black, and a minor portion of a THV copolymer with a melting temperature below 150° C., at a level between 0.5-5% of the polymer content of the blend.
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