(19)
(11) EP 3 736 303 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
21.04.2021 Bulletin 2021/16

(43) Date of publication:
11.11.2020 Bulletin 2020/46

(21) Application number: 19172816.1

(22) Date of filing: 06.05.2019
(51) International Patent Classification (IPC): 
C08G 63/08(2006.01)
A61L 27/12(2006.01)
A61L 31/06(2006.01)
C08G 63/82(2006.01)
 A61K 47/34(2017.01)
A61L 27/18(2006.01)
C08G 63/64(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(71) Applicants:
  • Evonik Operations GmbH
    45128 Essen (DE)
  • Friedrich-Schiller-Universität Jena
    07743 Jena (DE)

(72) Inventors:
  • WINDHAB, Norbert,
    65719 Hofheim (DE)
  • BINDL, Martin,
    68239 Mannheim (DE)
  • KARAU, Andreas,
    63571 Gelnhausen (DE)
  • SEIBEL, Manuel,
    64625 Bensheim (DE)
  • ENDRES, Thomas,
    Hoover, AL 35226 (US)
  • SCHUBERT, Ulrich Sigmar,
    07743 Jena (DE)
  • WEBER, Christine
    07745 Jena (DE)
  • BANDELLI, Damiano
    50068, Rufina, Florence (IT)

(74) Representative: Evonik Patent Association 
c/o Evonik Industries AG IP Management Bau 1042A/PB 15 Paul-Baumann-Straße 1
45772 Marl
45772 Marl (DE)

   


(54) NOVEL CATALYZED SYNTHESIS OF BIODEGRADABLE POLYESTERS


(57) The invention relates to a catalytic process for preparing polyester by ring-opening polymerization of at least one substituted glycolide of formula (I) or copolymerization of at least one substituted glycolide of formula (I) with trimethyl carbonate and/or at least one lactone of formula (II), wherein a strontium(II) alkoxide Sr(OR3)2, is used as a catalyst.