COPOLYMER, PAPER-TREATING AGENT, AND PROCESSED PAPER

摘要

A paper-treating agent which comprises a copolymer comprising, as essential components, units derived from a (meth)acrylate having a polyfluoroalkyl group, units derived from a pyrrolidone monomer, nitrogen-containing units, e.g., -[CH2C(CH3)[COOCH2CH2CH2N<+>(CH3)3.Cl<->]]-, and units containing an anionic functional group, e.g., -[CH2C(CH3)COOH]-. The paper-treating agent has a low viscosity and is less apt to suffer a decrease in performance even when used in combination with a cationic paper-strengthening agent.