U.S.8,138,250 B2
H R D Corporation has been granted a patent for an ink composition,comprised of between 20%-60%weight percent of an acrylic resin dispersion;between 5%-30%weight percent of a pigment;between 20%-75%weight percent of an aqueous solvent;and between 0.5%to 5%weight percent of a hydrogenated,vegetable-derived wax,the wax being characterized by an iodine value between 2 to 5,and wherein the wax is a wax comprising 20%castor wax and 80%soybean wax by weight.
Source:
http://www.coatingsworld.com/issues/2012-09/view_patents/hrd-corp-patents-wax-for-reducing-mar-and-abrasion-in-inks-and-coatings/
