| 摘要 |
<p>1481074 Magnetic compositions BASF AG 4 Oct 1974 [5 Oct 1973] 43084/74 Headings C3R and C3B A recording medium comprises a base coated with a dispersion in an organic binder of a finely-divided magnetic pigment and a lubricant comprising (I) where n is 3-8, R<SP>1</SP> and R<SP>2</SP> are optionally halogenated C 3-18 alkoxy or aralkoxy, or R<SP>1</SP> and R<SP>2</SP> together form -O-R<SP>3</SP>-O- where R<SP>3</SP> is a C 3-18 aliphatic radical. (I) may be, e.g. where R is C 2-18 alkyl or alkaryl, or where X is Cl or Br. Also present as lubricant may be a C#16 ester of a mono- or di-carboxylic acid, or a polysiloxane. In examples the binder comprises an elastomeric polyurethane and an epoxy resin. Other binders are specified.</p> |
