Magnetic recording medium having a dimensional variation
摘要
說明書
Examples thereof, for example, include polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinylidene chloride copolymers, vinyl chloride-acrylonitrile copolymers, acrylic acid ester-acrylonitrile copolymers, acrylic acid ester-vinyl chloride-vinylidene chloride copolymers, vinyl chloride-acrylonitrile copolymers, acrylic acid ester-acrylonitrile copolymers, acrylic acid ester-vinylidene chloride copolymers, methacrylic acid ester-vinylidene chloride copolymers, methacrylic acid ester-vinyl chloride copolymers, methacrylic acid ester-ethylene copolymers, polyvinyl fluoride, vinylidene chloride-acrylonitrile copolymers, acrylonitrile-butadiene copolymers, polyamide resins, polyvinyl butyral, cellulose derivatives (cellulose acetate butyrate cellulose diacetate, cellulose triacetate, cellulose propionate, nitrocellulose), styrene-butadiene copolymers, polyester resins, amino resins, synthetic rubbers, and the like.
Furthermore, examples of the thermosetting resin or reactive resin include a phenolic resin, an epoxy resin, a urea resin, a melamine resin, an alkyd resin, a silicone resin, a polyamine resin, a urea formaldehyde resin, and the like.
Furthermore, a polar functional group such as —SO3M, —OSO3M, —COOM, and P═O(OM)2 may be introduced into each of the binders described above, for the purpose of improving the dispersibility of the magnetic powder. Here, M in the formula represents a hydrogen atom or an alkali metal such as lithium, potassium, or sodium.
