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PVP/VA copolymers are available as white powders or clear solutions in ethanol, isopropanol and water. Polymers in the four ranges of vinylpyrrolidone content (30, 50, 60 and 70 percent), are produced in ethanol or isopropanol. The PVP/VA copolymers with 60 and 70 percent vinylpyrrolidone content are available as solids or as 50 percent aqueous solutions. PVP/VA polymers produce transparent, flexible, oxygen permeable films which adhere to glass, plastics and metals.
