| 摘要 |
A process for preparing a polyaminopolymer which contains functionality comprises the steps of (a) contacting a polyfunctional amine with an unsaturated alkylating agent under reaction conditions to form an amine/unsaturated alkylating agent adduct; (b) contacting the adduct with a polyfunctional compound such that a polyaminopolymer is formed: (e) contacting the polyaminopolymer with a halogen, hypohalous acid or precursor thereof such that a polyaminopolymer having halohydrin or dihalo functionality is formed, and (d) raising the pH of the polyaminopolymer having halohydrin or vicinal dihalo functionality sufficiently to cause an increase in molecular weight. Alternatively, the invention is a process having steps (a), (b), (c) and optionally (d), but with a step (h) between steps (b) and (c) of contacting the polyaminopolymer with a crosslinking agent therefor having at least two functional groups reactive with amine groups such that a crosslinked polyaminopolymer is formed. Polyaminopolymers so prepared, papers using such polymers, and processes for preparing such papers are novel. The papers preferably have improved wet strength. The polyaminopolymers are useful when dried (especially freeze dried) and redissolved. Certain of the polyamino-polymers have structures of Formula IV: [-R'N-(CnH2nNR)m-CO-Q-CO-] wherein R and R' are independently H or unsaturated organic group, n is the number of carbon atoms, m is the number of repeating units, and Q is a divalent organic group. Compounds of Formula IV are also made from a polyamide by alkylation with excess alkylating agent at high pH.
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