Resin dispersions having uniform particle diameters, resin particles and processes for producing both

A particulate resin comprising

• resin particles (C) having a structure such that a resin particle (A) composed of a resin (a) adheres to the surface of a resin particle (B) composed of a resin (b)
• wherein
• (1):
• the volume average particle diameter ratio of resin particles (A) to resin particles (B) is 0.001 to 0.3,
• (2):
• the volume average particle diameter of resin particles (A) is 0.01 to 30 μm and the volume average particle diameter of resin particles (B) is 0.1 to 300 μm,
• (3):
• the volume average particle diameter/number average particle diameter of resin particles (C) is 1.00 to 1.20,
• (4):
• at least 5% of the surface of the resin particle (B) is covered with the resin particle (A),
• (5):
• resin particles (C) have a BET specific surface area of 0.5 to 5.0 m2/g,
• (6):
• resin particles (C) have a surface average centerline roughness Ra value of 0.01 to 0.8 μm,
• (7):
• resin particles (C) have a Wadell practical sphericity of 0.90 to 1.00, and
• (8):
• resin (a) and/or resin (b) is at least one resin selected from the group consisting of polyurethane resin, epoxy resin, vinyl resin, and polyester resin.

A particulate resin comprising

• resin particles composed of a resin (b),
• wherein
• (1):
• the volume average particle diameter/number average particle diameter of the resin particles is 1.0 to 1.20,
• (2):
• the BET specific surface area of the resin particles is 0.5 to 5.0 m2/g,
• (3):
• the surface average centerline roughness Ra value of the resin particles is 0.01 to 0.8 μm,
• (4):
• the Wadell practical sphericity of the resin particles is 0.90 to 1.00, and
• (5):
• the resin (b) is at least one resin selected from the group consisting of polyurethane resin, epoxy resin, vinyl resin, and polyester resin.