▎ 摘　　要

NOVELTY - Conductive polyurethane composite emulsion comprises a modified nano-carbon material comprising 10 pts. wt. graphene oxide, 20-30 pts. wt. multi-walled carbon nanotubes, 1.5-2 pts. wt. silane coupling agent, 3-4 pts. wt. first polyester polyol, and 5-10 pts. wt. alcohol diluent. USE - The Conductive polyurethane composite emulsion useful for conductive coatings, electric heating coatings, and electromagnetic shielding coatings. ADVANTAGE - The conductive PUA composite emulsion has good stability and strong conductivity, which can be well applied to conductive coating, electric heating coating, electromagnetic shielding coating and other fields. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of the composite emulsion, involving (a) adding a second polyester polyol and mixed chain extender to a nitrogen-protected reaction kettle, dehydrating under a vacuum at 100-110℃ for 1-2 hours, cooling to 60-80℃, adding solvent, stirring, opening the condensation reflux device, rotating at 120-180 rpm for 10-15 minutes until the raw material is dissolved, adding the modified nano-carbon material and catalyst, and stirring for 20-30 minutes to a uniform dispersion state, (b) diluting the aliphatic isocyanate and solvent, slowly dripping into the reaction kettle within 20 minutes, heating at 80-90℃, and stirring for 40-60 minutes to react, (c) cooling to 75-85℃, adding 1/3 of the initiator and 1/2 of the emulsifier, increasing the stirring speed to 240-600 rpm, diluting the acrylic monomer with solvent, slowly dripping to the reaction kettle within 10-30 minutes, adding deionized water, and stirring the reaction for 40-60 minutes, (d) diluting with deionized water, dripping the initiator of 2/3 of the formula and emulsifier of 1/2 of the formula to the reaction kettle within 20-40 minutes, and stirring the reaction for 40-60 minutes, and (e) adding the remaining deionized water, cooling to room temperature, closing the condensation reflux device, adding neutralizing amine for neutralization, controlling the pH value to 7.5-8.5, and discharging the material to prepare the emulsion.