Hostaflon PFA

In 1972 Du Pont introduced Teflon PFA, a copolymer of tetrafluoroethylene and perfluorofpropyl vinyl ether) (CF2 = CFOCF2CF2CF3). Similar materials are now also produeed by Asahi Glass, Daikin, Hoechst and Monteflos and are commonly referred to as PFA fluoropolymers. In 1994 Hoechst introduced Hostaflon PFA-N, claimed to have significantly lower melt viscosities than earlier grades of material. 

Somewhat between PTFE and PFA materials is the product Hostaflon TFM, which is a copolymer of TFE and a small amount of the perfluoro(propyl vinyl ether). It has improved impact strength and weldability and has been promoted as a suitable material for forming into bottles. Yet another TFE-perfluoroalkoxy copolymer was introduced by Du Pont in 1979 as Teflon EPE. This material had a somewhat lower melting point (295 °C) than the more common PFA fluoropolymers but it is no longer marketed. 

PFA CF2=CF7 CF2=CFORf Hostaflon TFA Neoflon AP Teflon Hoechst Dai kin Du Pont Germany Japan USA... 

Algoflon, Dyneon, Fluon, Halon, Hiflon, Hostaflon, Neoflon, Polyflon, Soreflon, Teflon, Teflon FEP, Teflon PFA. 

Hostaflon Fluoropolymers (PTFE, PFA, ETFE) Hoechst Celanese Corp. 

Tetrafluoroethylene (TFE) [116-14-3] and perfluorovinyl ether are copolymerized in aqueous (1,2) or nonaqueous (3) media. The polymer is separated and converted into various forms, such as extruded cubes, powders, beads, or dispersions. This family of products is manufactured by DuPont, Daikin, Dyneon, and Asahi Glass and sold under the trade names of Teflon PFA, Neoflon AP, Hostaflon TFA, and Aflon PFA, respectively. Additional information on speciflc manufacturers products can often be obtained by consulting their internet web sites (for example, www.dupont.com/teflon). 

With commercialization of PFA and "TEFZEL" in 1972 a burst of enthusiasm for polymers combining the various structural characteristics ensued. Polymers developed included terpolymers of TFE/HFP/PPVE ("TEFLON" EPE [11], "Hostaflon" TFA and "TEFLON" FEE [12]). The former polymers have certain modest property advantages over blends of FEP with PFA, However, these advantages have not been sufficient to generate enthusiastic use in industry. The FEE copolymers are more interesting since, despite their hydrocarbon content, they have a balance of properties quite similar to those of PFA (Table IV), They are superior to PFA in two ways ... 

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