| 摘要 |
A copolyester carbonate especially suitable for the preparation of machine readable data carriers is disclosed. The inventive copolyester carbonate contains structural units derived from acids according to formula (I), wherein D denotes a mixture of divalent hydrocarbon radicals substantially corresponds to one or more of wherein E1, E2, E3 and E4 denote one of the substituents -(CH2)i-, -(CH2)j-, -(CH2)kCH3 and -(CH2)1CH3, and a, b, c, d, e, f, g, h, i, j, k, l, m, n, o and p independently of one another denote an integer between 1 and 10.
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