| abstract |
The invention provides a normal-temperature curing polyurethane anti-fog film and a preparation method thereof, belonging to the technical field of high polymer materials. The antifogging film comprises a polyurethane prepolymer and a curing cross-linking agent, and the weight ratio of the polyurethane prepolymer to the curing cross-linking agent is 100 (1-20), preferably 100 (15-20). The antifogging film is mainly crosslinked and cured by carboxyl and aziridine groups at normal temperature, does not consume energy, contains a polymerized surfactant, does not migrate and does not fall off. The antifogging film has the advantages of high light transmittance, stable and durable antifogging effect, scratch resistance on the surface, high adhesion with a substrate, excellent water resistance and simple preparation method, and is suitable for large-scale industrial production. |