| 摘要 |
A spin finish composition comprising a polyester carbonate corresponding to formula I:wherein R<1 >and R<5 >independently of one another represent linear or branched, saturated or unsaturated alkyl groups containing from about 6 to 21 carbon atoms, R<2 >and R<4 >independently of one another represent alkyl groups containing from about 2 to 4 carbon atoms, R<3 >represents a saturated or unsaturated, linear or branched difunctional hydrocarbon radical containing 1 to 22 carbon atoms, k has a value of 0 or 1 to 50, l has a value of 1 to 300, n has a value of 2 to 50 and m has a value of from 2 to 50.
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