| 摘要 |
<P>PROBLEM TO BE SOLVED: To provided an intermediate film for laminated glass by which the sound insulation property of the laminated glass is enhanced. <P>SOLUTION: The intermediate film 1 for the laminated glass comprises a first layer 2 containing a polyvinyl acetal resin and a plasticizer and a second layer 3. In the phase diagram of three values such as the degree X of acetalization, the degree Y of acetylation and the content percentage Z of the hydroxyl group in the polyvinyl acetal resin in the first layer 2, the respective three values such as the degree X of acetalization, the degree Y of acetylation and the content percentage Z of the hydroxyl group are present in a region R1 enclosed by a line L1 which is connected with 4 linear segments where a first coordinate A ((X):(Y):(Z)=70 mol%:30 mol%:0 mol%), a second coordinate B ((X):(Y):(Z)=34 mol%:30 mol%:36 mol%), a third coordinate C ((X):(Y):(Z)=94 mol%:0 mol%:6 mol%) and a fourth coordinate D ((X):(Y):(Z)=100 mol%:0 mol%:0 mol%) are connected in this order. <P>COPYRIGHT: (C)2013,JPO&INPIT |
