BLENDED FLUOROPOLYMER COATINGS FOR RIGID SUBSTRATES

• Main Authors: LEECH, LAWRENCE D, HARVEY, LEONARD W
• Format: Patent
• Language: English; Polish
• Published: 31.12.2012
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

The present invention provides a fluoropolymer coating composition, comprising: at least one high molecular weight polytetrafluoroethylene (HPTFE) having a number average molecular weight (M n ) of at least 500,000 and including a modifying co-monomer in an amount less than 1 wt.% based on the weight of said high molecular weight polytetrafluoroethylene (HPTFE), said at least one HPTFE being present in an amount of between 75 wt.% and 95 wt.%, based on the total solids weight of all fluoropolymers in said coating composition; and a blended fluoropolymer composition present in an amount of between 5 wt.% and 25 wt.% based on the total solids weight of all fluoropolymers in said coating composition, said blended fluoropolymer composition comprising: at least one low molecular weight polytetrafluoroethylene (LPTFE) having a first melt temperature (T m ) of 335°C or less; and at least one melt-processible fluoropolymer (MPF).