| 摘要 |
Unique water-soluble polymers are prepared by reacting a polyalkylenepolyamine or a polyalkylenimine with an epoxide or an activated aziridine; the epoxide and aziridine rings are each connected to a hydrocarbon radical having at least eight carbon atoms through generally an ether, ester, carboxamide or phosphoramide linkage. The polymers are particularly useful as temporary paper sizes, i.e., the polymers impart a sizing effect which disappears after some days without affecting the absorbency characteristics of the paper after that time.
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