| 摘要 |
PROBLEM TO BE SOLVED: To provide a urethane-based adhesive for solar cell back sheet, good in initial adhesivity after cured on film, high in adhesivity at elevated temperatures, and having sufficiently high hydrolysis resistance over a long period, thus excellent in comprehensive balance, to provide a solar cell back sheet obtained using the adhesive, and to provide a solar cell module obtained using the solar cell back sheet.SOLUTION: An urethane-based adhesive for solar battery back sheets is obtained by mixing (A) an isocyanate group-terminated urethane prepolymer and (B) a polyol, wherein the urethane prepolymer is obtained by reaction between a hydroxyl-containing compound and an isocyanate compound, wherein the hydroxyl-containing compound includes a polycaprolactone polyol. This adhesive is good in initial adhesivity after cured on film and high in adhesivity at elevated temperatures, and has sufficiently high hydrolysis resistance over a long period, thus being excellent in comprehensive balance. |
