公开(公告)号：WO2022010959A1

公开(公告)日：2022-01-13

申请号：PCT/US2021/040605

申请日：2021-07-07

Applicant: ECOLAB USA INC.

Inventor： JORDAN, David, Steven ,  HUANG, Heqing ,  CHENG, Weiguo ,  WEI, Mingli ,  LIU, Mei ,  GRANGER, William, Arthur

IPC: D21H17/37 ,  D21H17/42 ,  D21H17/44 ,  D21H21/18 ,  D21H23/28 ,  D21H23/50 ,  D21H27/30 ,  D21H27/32

Abstract: The present disclosure provides methods and compositions for strengthening paper. The methods may include a step of spraying an anionic polymer onto a paper sheet to increase the strength of the paper sheet. The anionic polymer may have amino groups, amide groups, or a combination of amino groups and amide groups. These groups may be functionalized with an aldehyde. Methods may also include a step of adding a wet end composition to a wet end of the papermaking process.