Pigmentary copper phthalocyanine solid solution and transparent dispersion comprising it, their uses, and processes for preparing the dispersion

摘要

The present invention relates to pigmentary solid solutions comprising copper phthalocyanine (Pigment Blue 15; C.I. 74160) as host and other blue to violet pigments as guests. Preferred hosts are the alpha (Pigment Blue 15:1), beta (Pigment Blue 15:3) and epsi (Pigment Blue 15:6) crystal forms of copper phthalocyanine, especially the epsi crystal form. The present invention also relates to dispersions comprising solid solutions as pigment particles, and pigment derivatives as rheology improvers. Preferred dispersions of solid solutions in the e crystal lattice may be used in particular to prepare color filters for liquid-crystal displays (LCDs). The present invention also includes a process for preparing the dispersions of the invention, the solid solutions themselves, and the use thereof to pigment high molecular mass organic materials.