| abstract |
The invention relates to a method for preparing a wet strength agent comprisingna first step of reacting a nitrogen-containing polymer with a hydrophobic compound containing 6-40 carbon atoms tonform hydrophobic side-chain substituents on the polymer and a second step of reacting thenhydrophobised nitrogen-containing polymer obtained with a crosslinker to form a cationicnnitrogen-containing resin.nThe invention further relates to a wet strength agent and resin.nIt further relates to the use of said agent and resin in cellulosic suspensions, thenproduction of paper, preferably tissue paper, and paper, preferably tissue paperncomprising a wet strength resin or agent. |