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Abstract

Disclosed is a polymerization inhibitor of N-vinyl pyrrolidone monomers and use thereof. The polymerization inhibitor is selected from an inorganic weak acid potassium salt and/or an organic acid potassium salt. The polymerization inhibitor is added to N-vinyl pyrrolidone monomers, and is sealed and preserved under the protection of inert gas, wherein the addition amount of the polymerization inhibitor is 0.005-0.2% by mass with respect to the mass of the N-vinyl pyrrolidone monomers. Directly adding the polymerization inhibitor into the N-vinyl pyrrolidone monomers in proportion can inhibit the self-polymerization of the N-vinyl pyrrolidone monomers, and hence extend the shelf life. The chromaticity and toxicity of the monomers can be reduced to a great extent. The polymerization inhibitor can be used directly during solution polymerization without being removed, and does not affect the chromaticity of a polymerization solution.

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