Binder für magnetische Medien

摘要

A binder composition suitable for use with magnetic media comprising: (i) a phosphonated polyurethane having a plurality of units of the formula: in which: the nitrogen atom forms part of the backbone chain of the polymer, and R<1> and R<2> independently represent an alkyl group, cycloalkyl group, an aryl group or together comprise the necessary carbon atoms to complete a ring, and (ii) a vinyl chloride copolymer having pendant ammonium functionalities.