NAALDVORMIGE IJZEROXYDEPIGMENTEN ALSMEDE WERKWIJZE VOOR HET BEREIDEN HIERVAN.,申请号NL19770008330-传众专利搜索

NAALDVORMIGE IJZEROXYDEPIGMENTEN ALSMEDE WERKWIJZE VOOR HET BEREIDEN HIERVAN.

申请公布号：NL7708330(A)

申请号：NL19770008330

申请日期：1977.07.27

申请公布日期：1978.01.31

申请人：

BAYER AKTIENGESELLSCHAFT TE LEVERKUSEN- -BAYERWERK, BONDSREPUBLIEK DUITSLAND.

分类号：C09C1/22;C01G49/00;C01G49/02;C09C1/00;C09C1/24;G11B5/706;(IPC1-7):11B5/02;09C1/24

主分类号：C09C1/22

摘要：<p>An acicular to prismatic ferrimagnetic iron oxide pigment with a porosity of less than about 10% by volume, and optionally containing up to about 15% by weight of other metal oxides such as Zn or especially Co, are produced by heating a suspension of iron(III)oxide hydroxide in an autoclave to a temperature above about 100 DEG C in the presence of at least one mono-, di- or tri-saccharide, at least one alkali metal or alkaline earth metal hydroxide or carbonate and excess water, and washing, filtering and drying the resulting pigments.</p>