| 摘要 |
<p>Process for preparation of high molecular weight stabilizer compound by reaction of 2,2,6,6-tetraalkylated-4-piperidones with a hydroxyl functional amine; and, thereafter further reaction of the hydroxyl functional portion of the resultant product with a di-isocyanate or a di-acid to yield a high molecular weight product having recurring units with pendant piperidinyl functionality. These high molecular weight polymers and oligomers are especially suitable in the stabilization of polyolefins, (i.e., polypropylene) against degradation by ultra-violet light and are highly resistant, due to their relative size, against extraction from, and migration within, the stabilized polymer.</p> |
