(19)
(11) EP 4 093 819 A1

(12)

(43) Date of publication:
30.11.2022 Bulletin 2022/48

(21) Application number: 21770758.7

(22) Date of filing: 17.03.2021
(51) International Patent Classification (IPC): 
C08L 33/26(2006.01)
D21H 21/20(2006.01)
 D21H 17/55(2006.01)
(52) Cooperative Patent Classification (CPC):
D21H 17/55; D21H 21/20; D21H 21/18; D21H 17/375; D21H 17/37; D21H 17/44; C08F 220/56; C08F 8/28
 
C-Sets:
  1. C08F 220/56, C08F 226/02;
  2. C08F 8/28, C08F 220/56;
(86) International application number:
PCT/US2021/022809
(87) International publication number:
WO 2021/188705 (23.09.2021 Gazette 2021/38)
(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 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

(30) Priority: 18.03.2020 US 202062991318 P
27.05.2020 FI 20205543

(71) Applicant: Kemira Oyj
00180 Helsinki (FI)

(72) Inventor:
  • LU, Chen
    Marietta, Georgia 30062 (US)

(74) Representative: Stephens, Clare Jean 
Page White & Farrer Limited Bedford House 21A John Street
London WC1N 2BF
London WC1N 2BF (GB)

   


(54) COMPOSITIONS AND METHODS FOR INCREASED WET AND DRY STRENGTH