Whitford Corporation

Susan J Roberts-Bleming

Leonard W Harvey

Thomas James Bate

Helen L Brain

Lawrence D Leech

Anita K Peacock

Fluoropolymer compositions that include multiple fluoropolymer components and, in exemplary applications, may be applied as coatings to either rigid or flexible substrates. The compositions may themselves be applied as basecoats or overcoats, or may be combined with other components to formulate basecoats or overcoats. In one embodiment, the compositions include at least one low molecular weight polytetrafluoroethylene (LPTFE) and at least two chemically different melt processible fluoropolymers (MPF). In another embodiment, the compositions include at least one high molecular weight polytetrafluoroethylene (HPTFE), at least one low molecular weight polytetrafluoroethylene (LPTFE), and at least two chemically different melt processible fluoropolymers (MPF). After being applied to a substrate, optionally over a basecoat and/or a midcoat and then cured, the present compositions form coatings that demonstrate improved characteristics, such as improved release characteristics, abrasion resistance, translucency/transparency, and permeability, for example.

Blended fluoropolymer compositions having multiple melt processible fluoropolymers

Blended fluoropolymer compositions that, in one exemplary application, may be applied as a coating to a substrate and, optionally, may be applied to a substrate that has been previously coated with a primer or basecoat and/or a midcoat. In one embodiment, the composition is a blend of at least one high molecular weight trace modified polytetrafluoroethyelene (TMHPTFE) and at least one melt-processible fluoropolymer (MPF). After being applied to the substrate, optionally over a primer or basecoat and/or midcoat, and then cured, the present compositions form coatings that demonstrate improved abrasion resistance and/or improved release characteristics and/or increased translucency/transparency and/or improved impermeability. The present compositions may also be used to produce films having a high degree of clarity and impermeability. The present compositions in powder form may be melt or paste extruded to form articles with improved impermeability.

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Cheshire, United Kingdom

Susan J Roberts-Bleming