公开(公告)号：US11203838B2

公开(公告)日：2021-12-21

申请号：US16754838

申请日：2018-10-01

申请人： SOLENIS TECHNOLOGIES CAYMAN, L.P.

发明人： Christoph Hamers ,  Hans-Joachim Haehnle ,  Kai Pahnke ,  Anton Esser

IPC分类号： D21H23/04 ,  D21H17/45 ,  C08F218/00 ,  D21H21/18

摘要： A method for the production of paper or cardboard is provide comprising the following steps: (A) Adding a water soluble polymer P to a first aqueous pulp suspension, wherein polymer P is obtainable by Polymerizing to a polymer V of (i) 33 to 83 mol % of a monomer of formula I in which R1═H or C1-C6 alkyl, (ii) 6 to 56 mol % of diallyl dimethyl ammonium chloride, diallyl diethyl ammonium chloride or a salt form of a monoethylenically unsaturated monomer, (iii) 11 to 61 mol % of a monoethylenically unsaturated carboxylic acid, sulfonic acid or phosphonic acid, or salt forms thereof, (iv) 0 to 50 mol % of one or more ethylenically unsaturated monomers, and hydrolyzing the N—C(═O)R1 groups to form primary amino or amidine groups, (B) dehydrating the second aqueous pulp suspension to a wet paper structure, (C) dehydrating the wet paper structure.