| 摘要 |
[Problem] To provide a laminate comprising a layer including polyvinyl acetal and a layer including a hydrocarbon-based polymer, said laminate having excellent adhesion between these layers. [Solution] A composition including 30-70 parts by mass plasticizer relative to 100 parts by mass polyvinyl acetal, said plasticizer comprising 0.5%-100% by mass plasticizer having a polar group and 0%-99.5% by mass plasticizer not having a polar group and having 100% by mass total of the plasticizer having a polar group and the plasticizer not having a polar group. The composition exhibits a first peak and a second peak derived from the polyvinyl acetal, when the polyvinyl acetal is analyzed by HPLC using an ODS column having an inner radius of 4 mm and a length of 1 cm. |
