| 摘要 |
<p>An acrylic film comprising 70 to 95 parts by weight of (A) an acrylic rubber-containing polymer and 5 to 30 parts by weight of (B) an acrylic-based thermoplastic polymer and having a total amount of (A) the acrylic rubber-containing polymer and (B) the acrylic-based thermoplastic polymer of 100 parts by weight, a gel content of 50 to 70% by weight, and elongation at break in one direction of 180% or more, wherein (A) the acrylic rubber-containing polymer comprises an elastic copolymer comprising 50 to 99.9% by weight of an alkyl ester of an acrylic acid monomer unit, 0 to 49.9% by weight of other copolymerizable vinyl monomer unit, and 0.1 to 10% by weight of a copolymerizable crosslinkable monomer unit, and a monomer or a mixture thereof comprising 40 to 100% by weight of an ester of a methacrylic acid and 0 to 60% by weight of a vinyl monomer copolymerizable therewith, wherein a glass transition temperature of a polymer of the monomer or the mixture exceeds 65 DEG C; (A) the acrylic rubber-containing polymer has a gel content of at least 60% by weight, a graft rubber particle diameter of 0.08 to 0.16 mu m, and a calcium content of 50 to 500ppm; and at least 10% of 10 to 400 parts by weight of the monomer or the mixture is bonded to and is graft-polymerized onto 100 parts by weight of the elastic copolymer, and wherein (B) the acrylic-based thermoplastic polymer comprises 50 to 100% by weight of an ester of a methacrylic acid monomer unit having an alkyl group of 1 to 4 carbon atoms, 0 to 50% by weight of an ester of an acrylic acid monomer unit, and 0 to 50% by weight of at least one other copolymerizable vinyl monomer unit; and (B) the acrylic-based thermoplastic polymer has a glass transition temperature of 65 DEG C or less and a weight average molecular weight of 100,000 to 300,000.</p> |
