RELATIONSHIP BETWEEN SURFACE CHARACTER OF COPPER PHTHALOCYANINE BLUE PIGMENT PARTICLE AND SURFACE-POTENTIAL - SURFACE-POTENTIAL IN SOLVENTSAND OR ACRYLIC-MONOMERS/
K. Okura et S. Matsuzaki, RELATIONSHIP BETWEEN SURFACE CHARACTER OF COPPER PHTHALOCYANINE BLUE PIGMENT PARTICLE AND SURFACE-POTENTIAL - SURFACE-POTENTIAL IN SOLVENTSAND OR ACRYLIC-MONOMERS/, Nippon kagaku kaishi, (1), 1996, pp. 76-83
Study of suspension stability related to the surface potential of pigm
ent particle in nonaqueous system has been scarcely done due to the co
mplicated ionization phenomena. However, the surface potential of disp
ersed particles is very important for the study of dispersion stabilit
y. Surface potential of three different copper phthalocyanine pigments
was measured in solvents and/or acrylic monomers. The copper phthaloc
yanine pigment samples having three different surface characters were
prepared by surface treatment using amino derivative and sulfonated de
rivative of copper phthalocyanine compound. Dispersion stability was o
btained in the system where surface potential was recognized,and the s
urface potential was deeply related with the polarization and the diss
ociation of the polar solvents and/or monomers adsorbed on the surface
of pigment particles. The permittivity of the system was measured to
estimate the polarization and the dissociation of the polar solvents a
nd/or monomers. The interaction between the surface of pigment particl
e and the polar solvents and monomer molecules was quite different in
each pigment's surface.