| 摘要 |
<p>1370566 Magnetic coating FUJI PHOTO FILM CO Ltd 14 April 1972 [15 April 1971] 17465/72 Heading B2E [Also in Division C3] A coating composition for coating on a support to form a magnetic recording element, includes a ferromagnetic CrO 2 material disposed in a binder comrising 1 % a vinyl chloride-vinylidene chloride copolymer, an epoxy resin and a polyisocyanate. The CrO 2 material may be modified with less than 5% of Ru, Su, Sb, Ti, V, Mu, Fe, Co, Ni, F, P, As, Bi, Nb, Ta, Na, K, Li, Cs, Cd, Te, Be, B, Mg, Zn, Zr, Pt, Au or Hg. Specified polyisocyanates are 2:4 or 2:6 tolylene di-isocyanate, diphenyl-methane 4:4' diisocyanate, 3:3' ditolylene 4:4' diisocyanate, 1:5 naphthalenedricocyanate. Comparative examples illustrate the maintenance of good magnetic properties of coatings according to the invention even at high temperature and humidity.</p> |
