POLYMER, AND SOLAR CELL SEALANT USING SAME

摘要

Provided is a polymer from which an encapsulant excellent in weather resistance and processability can be obtained when being used for an encapsulant for a solar cell. The polymer that has a main chain comprising repeating units represented by formula (1) and repeating units represented by formula (2) and satisfies requirements (a1), (a2), and (a3),
(a1) : the ratio of the number of the repeating units represented by formula (2) to the total number of the carbon atoms that constitute the main chain of the polymer is from 3.8% to 7.5%; (a2) : the ratio X represented by formula (3) is from 82% to 100%; X = 100 × A / B
(a3) : the polymer has a melting point of 42°C to 90°C as measured with a differential scanning calorimeter.