Abstract: According to the present invention, a film having a tensile modulus of elasticity of 220 MPa or more is adopted as a surface substrate film for a motor vehicle brake disc antirust film. If needed, the surface substrate film is made to further contain an ultraviolet absorber in a proportion of 0.01 to 20 parts by mass relative to 100 parts by mass of the surface substrate film in such a way that the spectral transmittance of the surface substrate film in a wavelength region from 200 to 380 nm falls within a range from 0 to 20%. The present invention can provide a surface substrate film for a motor vehicle brake disc antirust film which surface substrate film is hardly peeled off when adhered onto a motor vehicle wheel.

Abstract: According to the present invention, a pressure-sensitive adhesive for a motor vehicle brake disc antirust film, which comprises an acrylic resin based pressure-sensitive adhesive prepared by crosslinking an acrylic copolymer containing a unit based on a (meth)acrylamide based monomer and having a weight average molecular weight of 500,000 to 1,100,000 with a polyisocyanate compound by the utilization of the unit based on a (meth)acrylamide based monomer as a crosslinking base point. The pressure-sensitive adhesive for a motor vehicle brake disc antirust film can provide a motor vehicle brake disc antirust film which is hardly peeled off when adhered onto a motor vehicle wheel.

Abstract: According to the present invention, a pressure-sensitive adhesive for a motor vehicle brake disc antirust film, which comprises an acrylic resin based pressure-sensitive adhesive prepared by crosslinking an acrylic copolymer containing a unit based on a (meth)acrylamide based monomer and having a weight average molecular weight of 500,000 to 1,100,000 with a polyisocyanate compound by the utilization of the unit based on a (meth)acrylamide based monomer as a crosslinking base point. The pressure-sensitive adhesive for a motor vehicle brake disc antirust film can provide a motor vehicle brake disc antirust film which is hardly peeled off when adhered onto a motor vehicle wheel.