POLYESTER HYBRID EPOXY CURING AGENTS Russian patent published in 2015 - IPC C08G59/54 C08G65/332 C08G65/333 C09D163/00 C08G18/50 C08G73/02 

FIELD: chemistry.

SUBSTANCE: invention relates to polyester-amide-amine compound of formula III, to method of thereof obtaining and application, to curable coating composition, cured composition, as well as to method of application of coating on substrate surface. Polyester-amide-amine compound has the following formula: where x: 1-200, y: 0-200, z: 1-100, m, n: 0-2, m+n ≥ 0.1, R = monovalent primary aliphatic or aromatic residue or amino-residue, in particular ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl or tret-butyl residue, or ethylamine, n-propylamine, iso-propylamine, n-butylamine, sec-butylamine or tert-butylamine residue. Method of obtaining said compound consists in the fact that reaction of polyetheramine with alkylacrylate is carried out at first stage. Reaction of polyalkyleneimine with product, obtained at first stage is carried out at second stage. Polyetheramine and polyalkyleneimine have at least one primary or secondary aminogroup. Polyester-amide-amine compound is applied as curing agent for epoxy or isocyanate systems. Curable coating composition contains curable compound, representing epoxy or isocyanate resin, and at least one said polyester-amide-amine compound. Method of applying coating on substrate surface, in particular internal surface of tube or pipeline, consists in the fact that, first, curable coating composition is obtained. After that, surface of substrate is, at least, partially covered with curable composition with its further curing.

EFFECT: invention makes it possible to obtain composition with low viscosity and thin glossy coatings with good hardness and flexibility.

16 cl, 2 tbl, 4 ex