The invention relates to the technical field of water-based coatings, and discloses a food-grade water-based
coating with skid resistance,
wear resistance and
stain resistance and application of the food-grade water-based
coating in a water cup, and the food-grade water-based
coating comprises a coating composition and oxidized
starch for curing, the coating composition comprises a
solvent, a hydrophilic response component, an
ion response component, a film-forming main body and a cross-linking agent, the oxidized
starch is prepared by reacting
starch with an
oxidizing agent. According to the anti-skid coating, the components of
carboxymethyl chitosan and
polyaspartic acid
sodium salt are cooperated, and a coating preparation process of step-by-step
dissolution and stirring at a specific rotating speed is matched, so that environmental adaptability anti-skid is realized.
Carboxymethyl chitosan absorbs water in a moist environment to generate conformational rearrangement and
expose polar groups,
polyaspartic acid
sodium salt is affected by ions in an
electrolyte environment to cause molecular chain curl, the friction performance of the coating in dry, moist and
electrolyte environments can be adjusted according to needs through linkage of
carboxymethyl chitosan and
polyaspartic acid
sodium salt, and meanwhile, the components are uniformly dispersed to guarantee response stability. The inherent contradiction between skid resistance and easy cleaning is solved.