COATINGS Russian patent published in 2021 - IPC C09D5/08 C08G59/40 C08G59/24 

FIELD: coating compositions.

SUBSTANCE: invention relates to compositions of epoxy primer with a low solvent content or without a solvent. A composition of primer coating with an exceptionally high solid content is proposed containing: (i) from 5.0 to 50% by wt. of at least one epoxy resin based on bisphenol F; (ii) from 1.5 to 12% by wt. of at least one silane; (iii) from 0 to 20% by wt. of at least one hydrocarbon resin; (iv) from 1.0 to 15% by wt. of at least one reactive diluent; (v) at least one hardener; wherein the specified composition has a solids content of at least 90% by wt. measured in accordance with ASTM D5201-05; wherein the specified composition has viscosity of 200 to 800 cP at 23°C and 50% OV (ASTM D4287), and wherein ratio between the amount of hydrogen equivalents in the hardener and the amount of epoxy equivalents in the coating composition is from 50:100 to 120:100. A set for primer coating, the use of the proposed coating composition for protecting metal substrate, and the corresponding metal substrate are also proposed.

EFFECT: proposed composition can be applied using usual airless spraying equipment to obtain a fast-curing anti-corrosion layer on substrate, wherein resulting coating has long-term viability.

20 cl, 14 tbl