Patents

Whitford Patents Fluoropolymer Coating

May 6, 2014

U.S. 8,586,677 B2
Whitford Corporation has been granted a patent for a fluoropolymer composition  comprised of at least one high molecular weight polytetrafluoroethylene, which has been trace modified with a modifying co-monomer (TMHPTFE) and having a number average molecular weight (Mn) of at least 500,000 and a first melt temperature (Tm) of less than 342° C.
The modifying co-monomer present in an amount of less than one weight percent, based on the weight of the TMHPTFE, the at least one TMHPTFE present in an amount of between 50 weight percent and 90 weight percent based on the total solids weight of all fluoropolymers in the composition; at least one melt-processible fluoropolymer (MPF) selected from perfluoroalkoxy (PFA) and methylflouroalkoxy (MFA), the  MPF present in an amount of between 10 weight percent and 50 weight percent based on the total solids weight of all fluoropolymers in the composition, and having a melt flow index (MFI) greater than 10 g/10 min; and wherein the composition lacks low molecular weight polytetrafluoroethylene (LPTFE) having a number average molecular weight (Mn) of less than 500,000.