Sun Chemical Corporation

Kyle Hill

Jarol Osorio

Jarol Alberto Osorio Murillo

Ted Kreutz

Kaci Allen

Described herein are printing ink compositions suitable for printing of microwavable flexible packaging. The printed black ink exhibits low microwave energy absorption, thus minimizing the risk of charring, arcing, ignition, distortion or burning during microwave heating processes. Nitrocellulose resin, a solvent, a polyurethane resin, and a carbon black pigment having at least one of an imaginary permittivity of &#x2264;3, preferably &#x2264;2, and a surface oxygen content of 1 wt % to 3 wt %, preferably 1.5 wt % to 2.5 wt % are among the components of the printing ink compositions. Also described is packaging suitable for exposure to microwave energy upon which the inks have been printed.

Microwavable solvent-based packaging ink composition

Described herein is an ink composition resistant to smearing, particularly when used in combination with adhesives, such as those containing polyols, including polyurethane adhesives. The present ink system is heat resistant, that is, it can withstand elevated temperatures, such as baking and cooking temperatures, and thus is suited for printing on food packaging in which the food contents are cooked in the packaging. The composition includes one or more of an elastomeric polyurethane resin, a styrene maleic anhydride copolymer, a polyurethane-polyol resin, and a group IV metal chelating agent.

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Rock Hill, SC, United States of America

Kyle Hill