Process for the preparation of pigments containing Cr.sub.2 O.sub.3
    2.
    发明授权
    Process for the preparation of pigments containing Cr.sub.2 O.sub.3 失效
    制备含有CR2O3的颜料的方法

    公开(公告)号:US5167708A

    公开(公告)日:1992-12-01

    申请号:US856351

    申请日:1992-03-23

    摘要: A process for the preparation of chromate-free, Cr.sub.2 O.sub.3 -containing pigments having a spinel, haematite or corundum structure comprises blending pigment-forming raw materials corresponding to the Cr.sub.2 O.sub.3 -containing pigments with from 0.5 to 10% by weight of boric acid or phosphoric acid, calculated as B.sub.2 O.sub.3 or P.sub.2 O.sub.5, respectively, and then annealing the blend whereby the chromate-free, Cr.sub.2 O.sub.3 -containing pigment is obtained.

    摘要翻译: 用于制备具有尖晶石,赤铁矿或刚玉结构的不含铬酸盐的含Cr2O3的颜料的方法包括将对应于含Cr2O3的颜料的颜料形成原料与0.5至10重量%的硼酸或磷酸 ,分别计算为B2O3或P2O5,然后对共混物进行退火,由此得到含铬酸盐的含Cr2O3的颜料。