REVERSIBLE CROSS-LINKING SYSTEM FOR POLYVINYLAMINES
A vinyl amine containing polymer comprises randomly distributed repeating monomer units having at least two of the following formulae: wherein, R1 is a hydrogen atom or a methyl group; and wherein the vinyl amine containing polymer comprises repeating monomer unit III and/or IV in a total amount of from about 1.5 weight percent to about 8 weight percent based on a total weight of the polymer.
1 . A vinyl amine containing polymer comprising randomly distributed repeating monomer units having at least two of the following formulae:
wherein, R1 is a hydrogen atom or a methyl group; and
wherein said vinyl amine containing polymer comprises repeating monomer unit III and/or IV in a total amount of from about 1.5 weight percent to about 8 weight percent based on a total weight of the polymer.
2 . The polymer of claim 1 wherein repeating monomer unit (I) is present.
3 . The polymer of claim 1 wherein repeating monomer unit (II) is present.
4 . The polymer of claim 1 wherein repeating monomer unit (III) is present.
5 . The polymer of claim 1 wherein repeating monomer unit (IV) is present.
6 . The polymer of claim 1 wherein repeating monomer unit (I) is absent.
7 . The polymer of claim 1 wherein repeating monomer unit (II) is absent.
8 . The polymer of claim 1 wherein repeating monomer unit (III) is absent.
9 . The polymer of claim 1 wherein repeating monomer unit (IV) is absent.
10 . The polymer of claim 1 wherein R1 is a methyl group.
11 . The polymer of claim 1 wherein R1 is a hydrogen atom.
12 . The polymer of claim 1 wherein the repeating monomer unit III and/or IV is present in a total amount of from about 2 weight percent to about 6 weight percent based on a total weight of the polymer.
13 . The polymer of claim 1 wherein the repeating monomer unit III and/or IV is present in a total amount of from about 2 weight percent to about 4 weight percent based on a total weight of the polymer.
14 . The polymer of claim 1 wherein the repeating monomer unit III and/or IV is present in a total amount of from about 4 weight percent to about 6 weight percent based on a total weight of the polymer.
15 . The polymer of claim 1 wherein the repeating monomer unit III and/or IV is present in a total amount of from about 6 weight percent to about 8 weight percent based on a total weight of the polymer.
16 . A method of making the polymer of claim 1 wherein said method comprises the steps of:
reacting a polyvinyl amine and/or vinyl formamide based compound and a compound having a piperidine moiety to form an intermediate; and
acidifying the intermediate to form the polymer.
17 . A method of making paper comprising the step of applying the polymer of claim 1 to pulp.