INTERACTION BETWEEN THE POLYMER MICROSPHERES AND THE PIGMENTS IN ORGANIC MEDIA: HOW TO SUPPRESS THE INTERACTION IN THE NAD COATINGS

摘要

The interaction between the polymer microspheres from NAD and the pigment particles in organic media was studied to improve the storage stabilities of NAD coatings. The pigments which cause the problems such as a viscosity increase or color change in the coatings exhibit strong affinities to the core polymer of NAD. From the results it is considered that the interaction are mainly caused by the substitution and/or bridging adsorptions of the pigment between the core and the pigment dispersant polymers. The effect of an electrostatic interaction seems to be negligible in the studied models.