Coating composition, method for manufacturing same, and separation membrane comprising same

A coating composition comprising a composite in which a dissociated natural polymer compound is bound to at least a portion of a surface of an acrylic polymer particle,

• wherein
• the coating composition is an aqueous coating slurry,
• the coating composition is water-soluble,
• the pH of the coating composition is in a range of 4 to 5,
• the concentration of the dissociated natural polymer compound is in a range of 1% to 10% by weight,
• the dissociated natural polymer compound is one selected from the group consisting of collagen, casein, albumin, gelatin, and a combination of two or more thereof,
• the composite is at least one of a plurality of composites in the aqueous coating slurry, and the plurality of composites are composite particles, and
• D10, D50 and D90 of the composite particles in the aqueous coating slurry are constant across said concentration range of the dissociated natural polymer compound, where Dx is a particle size value corresponding to x % of the composite particles in the aqueous coating slurry.