| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polyvinyl acetal resin composition and its sheet having excellent transparency, moisture resistance, flexibility and strength and a laminated glass having excellent transparency, penetration resistance and antiscattering property. <P>SOLUTION: The polyvinyl acetal resin composition contains 100 pts. mass of a polyvinyl acetal resin and 10-1,000 pts. mass of a modified polypropylene glycol containing≥50 mass% polypropylene glycol and/or propylene glycol structure and satisfying the following conditions (1) to (3). (1) 0.1≤Ha/Hp≤20, (2) 70≤Ha≤300 and (3) 10≤Hp≤700 wherein Ha and Hp are the hydroxyl value (mg-KOH/g) of the polyvinyl acetal resin and the hydroxyl value of the modified polypropylene glycol containing≥50 mass% polypropylene glycol and/or propylene glycol structure, respectively. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
