| abstract |
FIELD: chemistry. n SUBSTANCE: invention relates to carbodiimides having terminal urethane groups of formula (I), which can be used to protect ester polymers from hydrolysis. In formula (I), radicals R can be identical or different and is selected from groups of -NHCOOR III -, where R III is (C 1 -C 22 )-alkyl, (C 6 -C 12 )-cycloalkyl or corresponds to an alkoxypolyoxyalkylene radical, R 1 , R 2 and R 3 each independently, is methyl or ethyl, wherein each benzene ring having only one methyl group, n=0–20. n (I). n EFFECT: invention relates to methods for the preparation of carbodiimides containing their compositions for protecting ester-based polymers against hydrolysis, method for producing such a composition and use of carbodiimides in ester-based polyols as a protection against hydrolytic degradation. n 19 cl, 5 tbl, 10 ex |