PRODUCTION METHOD OF ECO-FRIENDLY NANO-CLAY DISPERSED WATER-SOLUBLE ACRYLIC POLYURETHANE COATING LIQUID CONTAINING BIODEGRADABLE CATALYST FOR REPLACING POLYETHLENE AND COATING PAPER

摘要

The present invention relates to a production method of a nano-clay dispersed water-soluble acrylic polyurethane coating liquid, which comprises the steps of producing a prepolymer by mixing a polyol, dimethylol propionic acid (DMPA) and isocyanate; neutralizing the prepolymer with a neutralizing agent diluted in an N-methylpinolidon (NMP) solution; producing water-dispersed polyurethane by adding distilled water to the neutralized prepolymer, water-dispersing the same, and adding a chain extender to the same; adding an acrylic monomer, a biodegradation catalyst and an initiator to the water-dispersed polyurethane, and stirring the same to produce water soluble acrylic polyurethane; and dispersing clay treated with an organified agent to the water-soluble acrylic polyurethane. The coating liquid produced by the method has excellent oil resistance, water resistance, oxygen barrier properties, moisture resistance, printability, heat sealability, and alkali dissociation properties, thereby being usefully used for coating eco-friendly food packaging materials which are easy to recycle (recycling).;COPYRIGHT KIPO 2019