LIQUID HYDROXYLAMINE CURING AGENT FOR ISOCYANATE PREPOLYMERS FOR PRODUCING SPRAYED POLYUREA-URETHANE COATINGS Russian patent published in 2014 - IPC C08G18/32 C08L75/02 C08L75/04 

FIELD: chemistry.

SUBSTANCE: invention relates to formulations of liquid "hybrid" hydroxylamine curing agents for urethane prepolymers with terminal isocyanate groups, used in producing sprayed thick-layer polyurea-urethane coatings designed for corrosion protection of metal pipes, moulded coupling components, stop valves of compressor and pump stations, mounting assemblies main and field oil and gas pipelines, reservoirs for underground storage of liquefied gas and oil storages in factory or route coating conditions during construction, reconstruction and overhaul repairs. The composition of the curing agent includes the following components: 3,3'-dichloro-4,4'-diaminodiphenylmethane as an aromatic diamine, polyoxypropylenetriol with molecular weight of 5000 units as oligoether polyol, polydiethylene glycol adipate with molecular weight of 800 units as oligoester polyol, N,N'-tetraoxypropylene ethylenediamine with hydroxyl number of 640-800 mgKOH/g as oxypropylated ethylenediamine, black dye Nigrosin as a fat-soluble pigment.

EFFECT: invention enables to obtain a liquid curing agent with active hydrogen atoms, obtain a non-primer anticorrosion polyurea-urethane, having metal adhesion and cathodic disbonding resistance higher than GOST R51164-98 requirements for coatings with a primer undercoating.

2 tbl, 7 ex