Polyvinylidene Fluoride—Rilsan

FORAFLON in general resists mineral acids, bases, saline solutions, oxidizing agents, and halogens. However, it is attacked by concentrated hot sulphuric acid or nitric acid and very concentrated alkaline solutions. 

FORAFLON resists alcohols, chlorinated solvents, aliphatic and aromatic hydrocarbons and crude oil. 

It swells in certain polar solvents like ketones and esters and dissolves in aprotic solvents like dimethylacetamide, dimettiylformamide and N methylpyrrolidone. It is also attacked by hot amines. 

As an indication, the following table shows the good resistance of FORAFLON immersed under stress in some particularly aggressive reagents. 

Test pieces are cut according to ASTM D 1708 from an extruded plate 0.7 mm thick, and either unbent or bent by the device recommended in standard ASTM D 1693.- they are immersed in a reagent at the temperature indicated. 

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