| 摘要 |
<p>UV-ABSORBING CONDENSATION POLYMERIC COMPOSITIONS AND PRODUCTS THEREFROM Polyester compositions useful in formed articles such as beverage bottles and having condensation reacted therein at least one UV-absorbing compound of the formula wherein: R is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, cycloalkyl, substituted cycloalkyl, or alkenyl: R1 is hydrogen, or alkyl, aryl, or cycloalkyl, all of which may be substituted; R2 is hydrogen, or alkyl, cycloalkyl or aryl, all of which may be substituted R3 is hydrogen or 1-3 substituents; and P is cyano or a group such as carbamoyl, aryl, alkylsulfonyl, arylsulfonyl, alkanoyl or aroyl, all of which groups may be substituted; whereby the polyester composition has maximum light radiation absorbance within the range of from about 320 nm to about 380 nm.</p> |
