| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a composite film having flexibility at low temperature. <P>SOLUTION: The composite film includes an acryl series polymer and a urethane polymer. This acryl series polymer comprises an acrylic component including at least an acrylic acid series monomer, and a monofunctional acryl series monomer having a glass transition temperature (Tg) of a homopolymer of 273 K or higher. The content of the acrylic acid series monomer is 0.5 wt.% or more to 15 wt.% or less in the composite film, the glass transition temperature (Tg ac) of the acryl series polymer is 273 K or higher and the glass transition temperature (Tg ur) of the urethane polymer is 273 K or lower, and the glass transition temperature (Tg com) of the composite film is 269 K or lower. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
