Patent ID: 11795276

Abstract:
Provided are composite particles including hydrophobic solid particle A and hydrophobic solid particle B over surface of hydrophobic solid particle A, wherein contact angle CAa of hydrophobic solid particle A with water is 110 degrees≤CAa≤180 degrees, contact angle CAb of hydrophobic solid particle B with water is 110 degrees≤CAb≤180 degrees, ratio (d50a/d50b) of number average particle diameter d50a of hydrophobic solid particle A to number average particle diameter d50b of hydrophobic solid particle B is 10≤(d50a/d50b)≤100, and coating ratio CR of composite particles expressed by Formula 1 is 50%≤CR≤500%, where in Formula 1, Xa, Ya, and Za represent mass (g), density (g/cubic micrometer), and volume (cubic micrometer) of hydrophobic solid particle A, and Xb, Yb, and Zb represent mass (g), density (g/cubic micrometer), and volume (cubic micrometer) of hydrophobic solid particle B.