US Patent Issued to Sun Chemical on July 8 for "Water-based washable printing inks for recycled plastics" (North Carolina Inventors)

ALEXANDRIA, Va., July 9 -- United States Patent no. 12,351,719, issued on July 8, was assigned to Sun Chemical Corp. (Parsippany, N.J.).

"Water-based washable printing inks for recycled plastics" was invented by Alexander Lahr (Charlotte, N.C.) and Bruce Marshall (Charlotte, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Method for recycling printed plastic articles without contaminating or staining the recycled plastic with color due the printed ink. The ink is a water-based composition comprising select self-crosslinking acrylate copolymers or polyurethane resins, which inks exhibit good adhesion under conditions of use, but which are readily removed as solid particles when exposed to a hot caustic so...