Preparation of polyvinylpyrrolidone-iodine

Details Preparation of polyvinylpyrrolidone-iodine Preparation of polyvinylpyrrolidone-iodine

C - Chemistry, Metallurgy

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C08F 226/08 (2006.01) A01N 59/12 (2006.01) C08F 8/20 (2006.01) C08F 8/22 (2006.01)

Patent

CA 1136342

O.Z. 0050/033151 ABSTRACT OF THE DISCLOSURE: A process for the preparation of PVP-iodine by reacting polyvinylpyrrolidone powder with elementary iodine at from 70 to 100°C. The reaction is carried out in the presence of formic acid, oxalic acid or an ammonium salt or amide of carbonic acid, formic acid or oxalic acid. The process avoids the disadvantage of long periods of heating, which can result in degradation of the polyvinylpyrrolidone, and is particularly suitable for the preparation of an stable PVP-iodine using a low molecular weight polyvinylpyrrolidone.

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