Particle Size of Pigments for Soy Water Based Inks

Dipesh Sonar, Alexandra Pekarovicova, and Paul D. Fleming III, Western Michigan University;
Veronika Husovska, American Ink and Technology

Most of the commercially available water-based inks are formulated and manufactured using acrylic chemistry-based resins. Excluding from being nonrenewable, they are also non-biodegradable raw materials. Besides being used as resins for water based printing inks, they are used in various different applications, such as in prosthetic dentistry, automotive industry, medical devices, paints, storage tanks, metal buildings, rail car coatings, bridges, pipes, sealant/adhesive, paper and printing industries. Transparent coatings made of acrylics contain of about 20-25 weight % solids and do not meet the requirements of VOC regulations anymore. Therefore, these kinds of materials need to be replaced by some other alternatives that are natural water borne polymer systems, which was the motivation behind the present research. The aim of this work is to develop soy based pigment dispersions for water based inks to replace acrylic ones.