Dry films are flexible, glossy and clear. The water resistance is excellent if the polymer has been adequately cured. When immersed in perchlorethylene, the films will exhibit moderate swelling. Duracet 898 should be thickened with cellulosic thickeners, although polyacrylate thickeners may be used if a pot life of less than 12 hours is adequate. Depending on conditions, this emulsion will generally dry and cure in from 1 to 4 minutes at from 275 to 300°F. If the cure time or temperature is marginal, catalysts such as aluminum chloride (0.5% on solution weight), diammonium acid phosphate (1.0%) or oxalic acid (0.1%) may be used. Water soluble melamine-formaldehyde resins (2% to 10%) will also co-react with this emulsion. The use of catalysts or reactive resins will shorten the useful pot life. Duracet 898 conforms compositionally with FDA Regulation 175.105.
Shelf Life: Three months at 70F. Store in closed containers.
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