(19)
(11) EP 4 186 537 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

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

(48) Corrigendum issued on:
17.07.2024 Bulletin 2024/29

(43) Date of publication:
31.05.2023 Bulletin 2023/22

(21) Application number: 20945919.7

(22) Date of filing: 28.08.2020
(51) International Patent Classification (IPC): 
C08J 3/075(2006.01)
C08L 67/00(2006.01)
A61L 24/00(2006.01)
 C08L 71/02(2006.01)
C08L 5/08(2006.01)
A61L 24/04(2006.01)
(52) Cooperative Patent Classification (CPC):
A61L 24/0031; A61L 24/0042; A61L 24/0015; A61L 24/046; A61L 2300/236; A61L 2300/404; A61L 2300/402; A61L 2300/41; A61L 2300/418; A61L 2300/416; C08J 3/075; C08J 2371/02; C08J 2405/08; C08J 2471/02; C08J 2377/04; C08J 2477/04
 
C-Sets:
  1. A61L 24/046, C08L 71/02;
  2. A61L 24/046, C08L 77/04;
(86) International application number:
PCT/CN2020/112194
(87) International publication number:
WO 2022/016664 (27.01.2022 Gazette 2022/04)
(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

(30) Priority: 23.07.2020 CN 202010718193

(71) Applicant: NKD pharm Co., Ltd
Beijing 100176 (CN)

(72) Inventors:
  • LENG, Hongfei
    Beijing 100176 (CN)
  • XU, Xiaoyu
    Beijing 100176 (CN)
  • TAO, Xiumei
    Beijing 100176 (CN)

(74) Representative: Wichmann, Hendrik 
Wuesthoff & Wuesthoff Patentanwälte und Rechtsanwalt PartG mbB Schweigerstraße 2
81541 München
81541 München (DE)


(56) References cited: : 
   
       


    (54) SEALING HYDROGEL, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF


    (57) A sealing hydrogel, a preparation method therefor and an application thereof, relating to the technical field of polymer materials. Raw materials for preparing the sealing hydrogel comprise a first component and a second component. The first component comprises a compound A and a compound B. The compound A is a multiarm polyethylene glycol derivative, and the compound B is polyarm copolyester of glycidyl isopropyl ether and ethyl glycidyl ether. The second component comprises oligopeptide or a derivative thereof. By means of the selection of a high molecular weight compound in gel components and the coordination of the first component and the second component, the swelling ratio of the hydrogel can be effectively reduced.