Preparation and Characterization of Water Base Co-Polymer Nano Particles and Use it as a Binder for Printing Ink

Abstract

This work is expected to provide an ideal 50% emulsion for modern day application in water-based flexographic inks and over print varnish. Numerous trials were undertaken to produce the ideal performance product from (St/BuA) emulsion co- polymer & (VAM), (®VeoVa10) and (BuA) terpolymer emulsion, also (EA), (2-EHA) and (MMA) as terpolymer emulsion having stable properties for a period of time (six month solid) Also, to achieve a low coagulum of both co and terpolymers . Two surfactant systems were used as well as changing the monomers ratio in the presence of constant ratio of initiator. The prepared polymers were investigated by testing: solid content %, wet coagulum 100mesh, (g/l), particle size (nm), viscosity (cP), molecular weight, hardness, adhesion and pH. Characterisation was undertaken using TEM, TGA and IR spectroscopy analysis. The selected best prepared (St/BuA) emulsion co-polymer & (VAM), (®VeoVa10) and (BuA) terpolymer emulsion were formulated in presence of pigments and other ingredients as flexographic inks water base and investigated by testing: PH, viscosity, degree of dispersion and water resistance. The prepared emulsion Co-ter polymers were conducted to incorporate in standard formulation of water base flexographic inks and compared with the commercial polymer (Johncryl 90) in standard formulation to study the difference between the prepared and the trade mark emulsion polymer. Also The selected best prepared terpolymer (EA), (2-EHA) and

(MMA) were formulated in the preparation of over print varnish for