FFKM

Ethylene-vinyl acetate mbbers (EAM)—this chapter Ethylene-acrylate mbbers (AEM)—this chapter Fluorombbers (FKM, CFM, FFKM, FZ, AFMU etc.)—Chapter 13 Silicone and fluorosilicone mbbers (MQ, VMQ, PMQ, PVMQ and FVMQ)— Chapter 29... [Pg.309]

FFKM perfluororubbers of the polymethylene type, having all substituent groups on... [Pg.947]

ASTM D1418 FFKM elastomer, such as DuPont Kalrez... [Pg.134]

Perfluoroelastomers represent a special subgroup of fluorocarbon elastomers. They are essentially rubbery derivatives of PTFE and exhibit exceptional properties, such as unequaled chemical inertness and thermal stability. Currently, there are two types of known commercial perfluoroelastomers, KALREZ and PERLAST . These have ASTM designation FFKM. [Pg.93]

Perfluoroelastomers (FFKM), such as KALREZ, are particularly suited for extreme service conditions. They are resistant to more than 1,500 chemical substances, including ethers, ketones, esters, aromatic and chlorinated solvents, oxidizers, oils, fuels, acids, and alkali and are capable of service at temperatures up to 316°C (600°F).55 Because of the retention of resilience, low compression set, and good creep resistance, they perform extremely well as static or dynamic seals under conditions where other materials, such as metals, FKM, PIPE and other elastomers, fail. Parts from FFKM have very low outgassing characteristics and can be made from formulations, which comply with FDA regulations.56 Primary areas of application of perfluoroelastomers are paint and coating operations, oil and gas recovery,... [Pg.112]

ETFE, FEP, HTE fluoroplastic, THV fluoroplastic, PTFE, modified PTFE, PTFE micropowders, PFA, PVDF, fluorocarbon elastomers (FKM, FFKM) PCTFE... [Pg.4]

Perflnoroelastomers (FFKM) contain a CSM that is essential for their cross-linking. Examples of CSMs are as follows ... [Pg.100]

Perfluoroelastomers (ASTM designation FFKM) are essentially copolymers of two perfluorinated monomers, TFE and PMVE with a CSM, which is essential for cross-linking. Perfluoroelastomers can be cured by ionizing radiation without any additives. The advantage of radiation cured FFKM is the absence of any additives, so that the product is very pure. The disadvantage is the relatively low upper-use temperature of the cured material, typically 150°C, which limits the material to special sealing applications only [32]. [Pg.101]

FIGURE 5.9 O-rings from FFKM. (Photo courtesy of DPA.)... [Pg.122]

Perfluoroelastomers (ASTM designation FFKM) such as copolymers of tetrafluoro-ethylene (TEE) and perfluoromethylvinyl ether (PMVE) can maintain their thermal stability to temperatures as high as 300°C (572°F) or even higher, with a maximum continuous service temperature of 315°C (599°F). Moreover, instead of hardening, the elastomer becomes more elastic with aging [13]. [Pg.173]

The longer the polymer chain is, the better is the resistance to compression set because of the improved ability to store energy. In Figure 8.3, the sealing compounds are NBR (nitrile rubber), EPDM (ethylene-propylene diene rubber), FVMQ (fluoro-vinyl-methyl [fluorosilicone]), VMQ (vinyl-methyl silicone), FKM (fluroelastomers), and FFKM (perfluoroelastomers). [Pg.113]

Fluoroelastomer FFKM 300°C O-rings, gaskets, seals parts... [Pg.160]

Features Compat. with ECO, EPDM, FFKM, NBR elastomers... [Pg.1035]

Perfluoro rubbers of the poly- methylene type having all substituent groups on the polymer chain either fluoro, perfluoroalkyl, or perfluoroalkoxy groups Fluoroelastomer FFKM... [Pg.215]

Commercially available fluorocarbon elastomers meet automotive specifications in the HK section of ASTM D2000 and SAE J200. ASTM D1418 specifies designations of composition fiuorocarbon elastomers are designated FKM, FEPM, or FFKM in the case of perfiuoroelastomers. [Pg.3317]

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