CHROMATE-FREE, QUICK-DRYING PROTECTIVE PRIMER Russian patent published in 2023 - IPC C09D163/02 C09D5/12 C08L63/02 

FIELD: polymers.

SUBSTANCE: present invention relates to polymer compositions for obtaining a chromate-free quick-drying primer based on modified oligomers, which can be used to protect structures made of metallic and non-metallic materials in coating systems. A chromate-free quick-drying protective primer is described, including a polymeric film-forming agent, a film-hardener - an organosilicon amine, an anti-corrosion pigment, a structure-forming filler, an organic solvent, characterized in that it additionally comprises a thio-containing elastomeric component with terminal sulfhydryl functional groups and a curing accelerator in the following ratio, weight parts: polymeric film-forming 90-110; thio-containing elastomeric component 15-35.0; film hardener - organosilicon amine 31-85.0; curing accelerator 2.1-4.9; a mixture of anti-corrosion pigments 43.0-86.0; a mixture of structure-forming fillers 74.0-114.0; mixture of organic solvents 150.0-227.0.

EFFECT: creating a composition of a chromate-free quick-drying primer used in coating systems during operation from -60 to +100°C, which reduces the porosity of coatings, internal stresses arising in the coating film, which increases elasticity, provides high adhesive strength with metal surfaces, as well as carbon fibre reinforced plastics, improves physical and mechanical properties, provides high water resistance, resistance to aggressive media, and also pore-filling ability during application on polymer composite material.

4 cl, 2 tbl, 11 ex