Fluoro rubbers

However, one should not forget that apart from the complexity of the synthesis fluoropolymers are very expensive. For example, the price of fluoro-rubber is more than 30-fold that of an ordinary rubber such as butadiene-styrene (SBR) or ethylene-propylene (EPDM). Cost was one of the factors that gave impetus to research polymer surface fluorination, with the object of imparting the properties of fluoropolymers to the surfaces of less expensive polymers without changing their bulk properties. [Pg.229]

The simple calculations presented below will show that surface fluorination of rubbers with XeF2 is economically advantageous as compared with fluoro-rubbers. The amount ofXeF2 needed for batch treatment of 5000 O-rings made from EPDM rubber (diam. 10.2 x 1.5 mm) is approximately 20 g. That means that the cost ofthe XeF2 needed for one batch treatment, is 20 x 1.5 = 30 for 5000 O-rings or about 0.0006 each. It should be kept in mind that, as mentioned above, the price for fluororubber is thirty times that of EPDM. [Pg.236]

Ethylene-propylene rubber Fluoro-rubber Hypalon Natural rubber Neoprene rubber Nitrile rubber Polysulphide rubber Polyurethane rubber Silicone rubber Styrene-butadiene rubber (SBR)... [Pg.124]

Use a heat resistant packing made of Teflon (polytetrafluoroethylene) or fluoro rubber. [Pg.182]

Property Butyl/halobutyl (isobutylene- isoprene copolymer) N atur al/Isoprene (cis-1,4-polyisoprene) Nitrile (butadiene- Sdicone Neoprene acrylonitrile (polydi-(polycbloroprene) copolymer) metbysiloxane) Fluoro- elastomers (fluoro- rubber) Uretbane (polyesterisocyanate) EPDM (etbylene Butadiene propylenediene (cis-polybuta-monomer) diene) ... [Pg.1478]

Rubbers are used mainly in the seals of packaging (i.e., for this, EPDM is used commonly, while nitrile polybutadiene rubber, and its derivates such as hydrogenated nitrile rubber and acrylates, fluoro-rubbers and silicones are all used for sealing oils and fuel containers, specifically). [Pg.122]

The types of rubber for the automotive industry can be considered in two groups tyres (mostly of NR, SBR, polybutadiene and butyl type rubbers), and profiles and seals (for profiles nitrile-butadiene rubber and derivatives, acrylates, fluoro-rubbers and silicones for sealing). [Pg.182]

Fluoroelastomers Fluorine-containing synthetic rubber with good chemical and heat resistance. Used in underhood applications such as fuel lines, oil and coolant seals, and fuel pumps, and as a flow additive for polyolefins. Also called Fluoro Rubber. [Pg.195]

FKM fluoro rubber of polymethyrene type having substituent fluoro... [Pg.186]

Fluoro rubber of the polymethylene type having substituent fluoro and perfluoroalkyl or perfluoroalkoxy groups on the polymer chain Fluoroelastomer FKM... [Pg.215]

Park, E.-S., Mechanical Properties and Processibility of Glass-Fiber-, WoUas-tonite-, and Fluoro-Rubber-Reinforced Silicone Rubber Composites. J.Appl. Polym. Sci. 2007,105, 460-468. [Pg.250]

Porous active carbon particles derived from various precursors and polytetrafluoroethylene are used as electrode material and binder material, respectively. Fluoro rubbers such as vinylidene fluoride, hexafluoropropylene, and tetrafluoropropylene can be used as binder. Specific surface area of porous particles is preferably between 2000 and 2500 m /g to obtain high volume capacity. [Pg.230]

M class elastomers contain only C atoms and no double bonds in their backbones this improves aging resistance. Examples ethylene-propylene rubber (EPDM), acrylate rubber (ACM), fluoro rubber (EKM)... [Pg.23]

Because of their chemical structure, fluoro rubbers exhibit excellent resistance to weathering and ozone [83]. [Pg.527]

EEPM Polymethylene fluoro rubber with one or more alkyl, fluoroalkyl, fluoroalkoxy groups and/or per-... [Pg.537]

EKM Polymethylene fluoro rubber from vinylidene fluoride and a comonomer fluoro, alkyl, perfluoroalkyl, or perfluoroalkoxy substituent groups with... [Pg.537]

Conditions for graft copolymerization of fluoro-rubbers and PVC with minor proportions of triallyl cyanurate with controlled cross-linking were developed for improvement of low-temperature flexibility . Besides applications already mentioned, I have helped develop... [Pg.237]

When, furthermore, the resistance against the aforementioned media is taken into account only a few elastomer classes remain. Most suitable are the following HR (butyl rubber) and EPDM (ethylene propylene diene rubber) or more generally hydrocarbon-based rubbers with highly saturated polymer backbones for sufficient temperature resistance and chemical ineitness as well as FKM (fluoro rubber), which is especially suited for high-temperature applications. [Pg.221]

Currently-used elastomers include natural rubber, the identical synthetic cis-polyisoprene, butyl rubber, nitrile rubber, neoprene rubber, ethylene-propylene co-polymer rubber, fluoro rubber, urethane rubber and silicone rubber. [Pg.99]

At the moment it appears that new fluoro rubbers, and possibly epichlorohydrin rubber, could offer a solution to these problems. On the other hand NBR manufacturers are working along lines which do not entail a renunciation of NBR. So many questions are still unanswered that any prediction of the future must still be hazardous. [Pg.80]

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