Nitto-denko Corporation

Koki Hashimoto

Takeshi Igarashi

Eiichi Imoto

Chihiro Yoshida

Provided is a paint-protective coating material formed from an acrylic coating composition comprising an acrylic polymer as base polymer. The acrylic polymer-forming monomers includes a monomer (m) having a homopolymer Tg of 90° C. or higher and a monomer (m) having a homopolymer Tg of −30° C. or lower. The monomer (m) includes at least acrylonitrile. In the monomers, the monomers (m) and (m) have a molar ratio (m/m) of 0.8 or higher and 1.5 or lower. The paint-protective coating material has storage moduli of 150 MPa or higher and 1000 MPa or lower at 23° C., and 0.40 MPa or higher at 70° C.

Paint-protective coating material and acrylic coating composition

Provided is a paint-protective coating material formed from a liquid coating composition. The coating composition comprises, as its base polymer, a polymer (A) that is a polymerization product of monomers comprising an acrylic monomer. The paint-protective coating material has a storage modulus at 70° C. of 0.40 MPa or higher and 1.30 or lower, a storage modulus at 23° C. of 250 MPa or higher and 800 MPa or lower, and a storage modulus at −30° C. of 2300 MPa or less.

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Ibaraki, Japan

Koki Hashimoto