(19)
(11) EP 4 680 661 A1

(12)

(43) Date of publication:
21.01.2026 Bulletin 2026/04

(21) Application number: 24729429.1

(22) Date of filing: 12.03.2024
(51) International Patent Classification (IPC): 
C08J 3/22(2006.01)
C08L 23/12(2006.01)
 C08K 3/04(2006.01)
(52) Cooperative Patent Classification (CPC):
C08J 3/226; C08K 3/04; C08K 3/041; C08K 2201/003; C08J 2323/12; C08J 2423/12; C08K 2201/004; C08K 2201/006
 
C-Sets:
  1. C08K 3/04, C08L 23/12;
  2. C08K 3/041, C08L 23/12;
(86) International application number:
PCT/US2024/019478
(87) International publication number:
WO 2024/191967 (19.09.2024 Gazette 2024/38)
(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: 13.03.2023 US 202363489797 P

(71) Applicant: Birla Carbon U.S.A., Inc.
Marietta, GA 30062-2253 (US)

(72) Inventors:
  • HU, Zhaokang
    Marietta, Georgia 30062-2253 (US)
  • CORELLA, Daniel
    Marietta, Georgia 30062-2253 (US)
  • LI, Zhenpeng
    Marietta, Georgia 30062-2253 (US)
  • KAMAT, Ranjan K.
    Marietta, Georgia 30062-2253 (US)

(74) Representative: Bohest AG 
Holbeinstrasse 36-38
4051 Basel
4051 Basel (CH)

   


(54) METHODS FOR MAKING POLYMER MASTERBATCHES AND FORMULATIONS CONTAINING BOTH CARBON BLACK AND CARBON NANOTUBES