| 摘要 |
<p>The thermal stability of a halogenated polycarbonate, or an article molded therefrom, is improved by incorporating a trisaryl phosphite into the halogenated polycarbonate in an amount of 200 to 1,500 weight parts per million. The thermal stabilizing effect of the phosphite is apparent in a reduced level of yellowness in the halogenated polycarbonate or molded article. Amounts of trisaryl phosphite less than 200 ppm or greater than 1,500 ppm do not give the desired stabilizing effect. Trisaryl phosphite which has performed its stabilizing effect is present as trisaryl phosphate.</p> |
