| 摘要 |
<p>Colouring compsn. contains a brownish black or black pigment consisting of pulverised particles of a lower Ti oxide having formula TinO2n-1 (I) (where n is integer 1 to 100). (I) is prepd. by (a) mixing a TiO2 powder, having particle size 0.01-1 mu, with metallic Ti powder, having particle size =10 mu, in mol. ratio 1-199:1, and (b) heating the mixt. in vacuo or in a reducing atmos., pref. to 500-1200 (600-1000) degrees C, for 1-20 hrs. (I) is used in cosmetics, partic. make-up cosmetics, paints, printing inks (claimed) and in pigment pastes. (I) can be used as pigments for colouring rubber and plastics. (I) mix well with other powders; are stable, easily used and prepd. (I) are non-toxic, i.e. do not irritate skin and eyes, and have low acute oral toxicity, e.g. LD50 25 ml/kg when used as a 20 wt. % suspension of TiO or Ti2O3.</p> |
