| abstract |
Acrylics that can be used as a substitute for PVC sol for watertight, dustproof, rustproof, etc. in parts such as automobile underbody floors, wheel houses, fuel tanks, vehicle body panel joints and bonnets, doors, etc. An acrylic polymer bead used for sol production and an acrylic sol composition containing the same are provided. An acrylic polymer bead having a core / shell / outermost shell structure has a core-forming unit containing a monomer having a homopolymer glass transition temperature (Tg) of 50 to 90% by mass or less. A core formed by emulsion polymerization of a monomer, and a shell formed by emulsion polymerization of a shell-forming monomer containing 60 to 90% by mass or more of a monomer having a glass transition temperature of 50 ° C. or higher of a homopolymer And one or more monomers selected from the group consisting of the core-forming monomer and the shell-forming monomer and an outermost shell layer formed by emulsion polymerization of acrylic acid. [Selection figure] None |