| 摘要 |
<p>PURPOSE: Certain ACAs(adhesion control agents) which are used to control adhesion of a sheet to glass, result in no-adhesion at all when humidity of an intermediate layer is high. Multivalent metal salts of organic monocarboxylic acid control such adhesion and are relatively insensitive to water absorption of the sheet, But multivalent metal salts contained in PVB(polyvinyl butyral) sheet affect UV stability of the sheet despite the presence of UV absorbent. CONSTITUTION: Resistance of PVB sheet against exposure to light is improved. Therefore UV stability is provided to PVB sheet containing multivalent metal carboxylic acid with ACA. The purpose and other purposes are achieved by providing a polyvinyl butyral sheet containing multivalent metal salt and benzotriazol compound of Formula 1 in UV stabilizing amount. In Formula 1, R1 is CH3, linear or branched C5 alkyl, linear or branched C12 alkyl, and R2 is CH3, linear or branched C5 alkyl,</p> |
