WEATHER-RESISTANT VARNISH AND BASE ENAMEL FOR OBTAINING MULTILAYER COATING SYSTEM Russian patent published in 2024 - IPC C09D127/12 

FIELD: polymer industry.

SUBSTANCE: invention relates to polymer compositions for producing protective paint coatings. Disclosed is base enamel for coating metals and polymer composite materials, consisting of a film-forming copolymer of fluoroalkene and vinyl ether, a pigment paste, a curing agent—a polyisocyanate, a UV stabilizer—a sterically hindered amine, dispersant—a copolymer of butyl methacrylate and methacrylic acid derivatives, a curing catalyst selected from tin dibutyl dilaurate, cobalt carboxylate, lead carboxylate, and an organic solvent. Also disclosed is a weather-resistant lacquer and a protective paint coating system.

EFFECT: reduced roughness of the coating, increased luster, reduced thickness and providing a color difference of not more than 3 after exposure to UV radiation for 1,000 hours.

6 cl, 2 tbl, 7 ex