Provided herein is a composition that includes a compound (I), and one or more diester compounds (II) selected from compounds represented by formula 1 and compounds represented by formula 2. The compound (I) and the diester compound (II) are contained in X parts by mass and Y parts by mass, respectively, with respect to 100 parts by mass of a polyvinyl acetal having an average amount of residual hydroxyl group of 15 to 50 mol%. In the composition, X = 3 to 100, Y = 5 to 60, and X + Y = 42 to 120. The composition does not involve bleeding of a plasticizer even when stored at low temperature, or cause problems due to extraction of a component even when brought into contact with water. The composition can thus develop desirable sound insulation performance when used as an intermediate film for laminated glass.
本文提供的组合物包括一种化合物(I)和一种或多种二酯化合物(II),二者选自式 1 所示化合物和式 2 所示化合物。化合物(I)和二酯化合物(II)的质量份数分别为 X 份和 Y 份,相对于 100 份聚
乙烯醇缩醛的质量份数,其残余羟基的平均含量为 15 至 50 摩尔%。在组合物中,X = 3 至 100,Y = 5 至 60,X + Y = 42 至 120。该组合物即使在低温下储存也不会造成
增塑剂渗出,即使与
水接触也不会造成成分萃取问题。因此,该组合物在用作夹层
玻璃的中间膜时,可以获得理想的隔音性能。