Patent ID: 6114026
Filing Date: 2000-09-05
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising:a nonmagnetic support; anda magnetic layer formed on said nonmagnetic support, said magnetic layer comprising a magnetic powder, a binder and a lubricant, said binder comprising a polyester polyurethane resin and a phenoxy resin, said lubricant comprising a polyhydric alcohol ester and silicone oil, the surface extraction from said coating type magnetic recording medium being 3.0.times.10.sup.-3 to 3.0.times.10.sup.-2 g/m.sup.2, one of said polyester polyurethane resin and said phenoxy resin having a functional group which improves dispersability of the magnetic powder, a ratio by weight of said polyester polyurethane resin to said phenoxy resin is from 9:1 to 7:3, a ratio by weight of polyhydric ester to silicone oil is from 1:1 to 5:1, and said binder does not have a glass transition outside of the range from 30.degree. C. to 70.degree. C.