77465-46-4Relevant academic research and scientific papers
The crystal and molecular structure of C.I.Pigment Yellow 155, a high performance bisacetoacetarylide disazo yellow pigment
Li, Zheng,Liu, Chong,Wang, Shujun,Lv, Dongjun,Xiao, Liwei
, p. 246 - 250 (2018/09/18)
C.I.Pigment Yellow 155 (Y 155) is an important bisacetoacetarylide disazo yellow pigment with a unique structure, which has the potential to be an alternative for benzidine yellow pigments due to its superior solvent resistance and light fastness. It is essential to investigate the crystal structure of Y 155 to understand the relationship between the structure and technical performance. Y 155 crystallizes in the triclinic P1(—) space group. The molecule exists in the bisketohydrazone form which is consistent with that of disazoacetoacetanilide pigments (Diarylide Yellows). Different from the unsubstituted analogue (BADA), Y 155 molecules are approximately planar due to stronger intramolecular hydrogen bonding. In Y 155 crystals, each molecule is interleaved in two adjacent layers above and below. The color and the technical performance are discussed in relation to its crystal structure especially involving in the role of four methyl formate groups.
Method of conditioning azo pigments containing carboxylic ester groups
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Page/Page column 3, (2009/08/16)
The invention provides a method of conditioning azo pigments containing carboxylic ester groups, using glycol monoalkyl ethers or mixtures of glycols and glycol dialkyl ethers
