Abstract
2(2,4-Dihydroxyphenyl) H-4-hydroxybenzotriazole and 2(2,4-dihydroxy-phenyl)2H-1,3-di(4-hydroxybenzotriazole) were incorporated in amounts of 1 to 10 mol% into examples of typical aliphatic or aromatic polyesters, either by direct synthesis from the monomers or by transesterification from already prepared polyesters. The polyesters showed UV spectra typical for the 2(2-hydroxyphenyl)2H-benzotriazole unit in amounts approximately corresponding to the feed composition. Some complications in the direct incorporation of dihydroxy-2(2-hydroxyphenyl)2H-benzotriazoles into polyesters were encountered when the diacid chloride method was used for the preparation of the polyesters; branched and crosslinked polyesters were obtained.
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Gomez, P., Vogl, O. Functional Polymers XLV. Incorporation of Dihydroxy 2(2-Hydroxyphenyl) H-Benzotriazole Derivatives into Polyesters. Polym J 18, 429–437 (1986). https://doi.org/10.1295/polymj.18.429
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DOI: https://doi.org/10.1295/polymj.18.429
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Monatshefte f�r Chemie Chemical Monthly (1988)