| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an adhesive composition for solar cell back sheets, which causes little reduction in adhesive strength even when left under a high-temperature and high-humidity condition for a long period of time and is less subject to discoloration even when left under a high temperature condition for a long period of time, and a solar cell back sheet using the adhesive composition. <P>SOLUTION: The adhesive composition for solar cell back sheets includes (C) modified rubber obtained by the reaction of (a) rubber containing at least two hydroxyl groups in a molecule and (b) isocyanate, (D) tackifier having a softening point of 85°C or higher and (E) cross-linking agent. The compounding ratio of the component (a) hydroxyl groups (OH) and the component (b) isocyanate groups (NCO) is within a range represented by the following formula: isocyanate groups/hydroxyl groups=0.1 to 0.9, and the component (a) rubber, which is either of isoprene rubber or butadiene rubber, is rubber saturated by adding hydrogen. <P>COPYRIGHT: (C)2012,JPO&INPIT |
