Resin composition for vibration-damping coating material, and production method therefor

A vibration damping coating comprising:

• a vibration damping coating resin composition that contains an emulsion particle having a multilayer structure;
• and
• a pigment,
• the emulsion particle including an outermost layer and an inner layer located inside the outermost layer,
• the inner layer being formed from a resin,
• the outermost layer being formed from a resin having a glass transition temperature of 60° C. or higher,
• the outermost layer being present in a proportion of 1% to 17% by mass in 100% by mass of the emulsion particle, wherein a glass transition temperature of the resin forming the outermost layer is higher than a glass transition temperature of the resin forming the inner layer by 10° C. or more, and
• wherein at least one of the resin forming the outer layer and the resin forming the inner layer comprises a (meth)acrylic polymer.

A method for producing a vibration damping coating resin composition containing an emulsion particle having a multilayer structure, the method comprising:

• polymerizing a monomer component to form a resin containing-inner layer;
• and
• polymerizing a monomer component to produce the emulsion particle with an outermost layer formed from a resin having a glass transition temperature of 60° C. or higher, and the outermost layer is present at a proportion of 1% to 17% by mass relative to 100% in the mass of the emulsion particle,
• wherein a glass transition temperature of a resin forming the outermost layer is higher than a glass transition temperature of the resin forming the inner layer by 10° C. or more,
• and wherein at least one of the resin forming the outer layer and the resin forming the inner layer comprises a (meth)acrylic polymer.