Application Number  00128468 Application Date  2000.11.16
Publication Number  1297003 Publication Date  2001.05.30
Priority Information   1999/11/17 US 60/166154  
Applicant(s) Name  Ciba SC Holding AG  
Inventor(s) Name  F. Bebler  
Patent Agency Code  72001 Patent Agent  zhang yuanzhong
AbstractAn alpha-II form of a 1,4-diketo-3,6-di(4'-tertiary butyl phenyl)-2,5-dihydr o pyrrolo[3,4-c]pyrrole pigment characterized by C.I.E color space values, particularly a high chrom a value and yellow hue, in masstone, and a process for its preparation is disclosed. The 1,4-diketo-3,6-di(4'-tertiary butyl phenyl)-2,5-dihydro pyrrolo[3,4-c]pyrrol e pigment is especially useful for coloring coating compositions, such as automotive paints, and plastics.