(19)
(11) EP 4 816 425 A1

(12)

(43) Date of publication:
07.10.2026 Bulletin 2026/41

(21) Application number: 24827378.1

(22) Date of filing: 22.11.2024
(51) International Patent Classification (IPC): 
C08F 210/06(2006.01)
C08F 4/659(2006.01)
 C08F 4/64(2006.01)
(52) Cooperative Patent Classification (CPC):
C08F 210/06; C08F 4/65908; C08F 4/65912
 
C-Sets:
  1. C08F 210/06, C08F 4/64158;
  2. C08F 210/06, C08F 236/20, C08F 2500/17, C08F 2500/30, C08F 2500/33, C08F 2500/34, C08F 2500/38, C08F 2500/39;
  3. C08F 210/06, C08F 236/20, C08F 2500/03, C08F 2500/17, C08F 2500/30, C08F 2500/33, C08F 2500/34, C08F 2500/38, C08F 2500/39;
(86) International application number:
PCT/US2024/057107
(87) International publication number:
WO 2025/117379 (05.06.2025 Gazette 2025/23)
(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 01.12.2023 US 202363605015 P

(71) Applicant: ExxonMobil Technology and Engineering Company
Spring, TX 77389 (US)

(72) Inventors:
  • LAMBIC, Nikola S.
    Seabrook, Texas 77586 (US)
  • NGUYEN, An Ngoc-Michael
    Pearland, Texas 77584 (US)
  • LOPEZ-BARRON, Carlos R.
    Houston, Texas 77059 (US)
  • CANICH, Jo Ann M.
    Houston, Texas 77059 (US)

(74) Representative: ExxonMobil Petroleum & Chemical BV 
IP Law Europe Hermeslaan 2
1831 Machelen
1831 Machelen (BE)

   


(54) FORMATION OF BRANCHED POLYPROPYLENES USING DIANIONIC COMPLEXES HAVING EIGHT-MEMBERED CHELATE RINGS