MULTICOMPONENT COMPOUND BASED ON EPOXY RESIN WITH LEAKAGE INDICATOR, AND CURING COMPONENT FOR COMPOUND BASED ON EPOXY RESIN Russian patent published in 2022 - IPC C08G59/50 C08G59/56 C08G59/62 C08L63/00 C08L63/04 C08K5/18 

FIELD: chemistry.

SUBSTANCE: invention relates to multicomponent compounds based on epoxy resin. A curing composition for a multicomponent compound based on epoxy resin is proposed, containing at least one first polyamine and at least one second polyamine, as well as at least one polyphenol including bisphenol selected from a group of bisphenol A and bisphenol F, or bisphenol selected from a group of bisphenol A and bisphenol F in combination with two-stage resin as a curing accelerator, while the first polyamine corresponds to the following general formula (I), where R₁ and R₂, independently of each other, are -H or -CH₃ or, together, are an optionally substituted C₃-C₈ hydrocarbon chain, which is connected with the formation of a cycle, and R₃ is -H, -CH₃, -CH₂-CH₂-NH₂, or -CH₂-CH₂-NH-CH₂-CH₂-NH₂, while the second polyamine corresponds to the following general formula (II) or (III), where R₁ and R₂, independently of each other, are H or -CH₃, and X is NH, O, or S. A multicomponent compound based on epoxy resin containing the specified curing composition, and the use of the curing composition are also proposed.

EFFECT: when in contact with air oxygen, the proposed curing composition changes color during several days, and, thus, leakages can be visually identified without the use of additional identifiers.

14 cl, 4 tbl, 11 dwg