摘要:
A method of preparing a pigment comprising in order the steps of: a) providing a pigment containing a nucleophile group under basic conditions; b) reacting the pigment with 1,4-butane sultone or 1,3-propane sultone in an alkaline medium to form sulfobutyl groups respectively sulfopropyl groups on the pigment surface; and c) adding acid to convert the sulfobutyl groups or sulfopropyl groups to sulfonic acid groups. Pigments obtainable by the method and non aqueous pigment dispersions are also disclosed.
摘要:
The invention provides an OLED device containing certain alkali metal cluster compounds with mixed ligands, such compounds, and methods of making them. In particular, the cluster compound is a neutrally charged mixed cluster compound comprising first and second subunits with the first subunit comprising an alkali metal salt of a nitrogen containing a heterocyclic ligand bearing a anionic hydroxy group and the second subunit consisting of an organic alkali metal salt different than the first subunit.
摘要:
A quinacridone derivative according to Formula (I): Formula (I), wherein R 1 and R 2 are each independently selected from the group consisting of hydrogen, alkyl and halogen. Methods for preparing non-aqueous pigment dispersions and inkjet inks comprising a pigment and the quinacridone derivative of Formula (I) are also disclosed.
摘要:
This invention relates to novel fluorinated dyes or colorants having high solubility and low viscosity in halogenated, especially fluorinated, solvents. The dyes or colorants of the present invention have shown to improve the performance of electrophoretic displays.
摘要:
A high chroma, opaque gamma 2, 9-dichloroquinacridone pigment specified by its particle shape and size and characterized by C.I.E. color space values in masstone, and a process for its preparation is disclosed. The new gamma 2, 9-dichloroquinacridone pigment is especially useful for coloring coating compositons, such as automotive paints, and plastics.