| 摘要 |
FIELD: construction. ^ SUBSTANCE: anti-corrosion protective coating consists of the first element - a single-component moisture-hardened isocyanate primer, which contains at least 75 wt % of a nonvolatile residue and 6Ç8 wt % of isocyanate groups. The second element is a thick-layer external coating, to produce which a double-component polyurea-urethane mastic is used, containing an isocyanate prepolymer on the basis of diphenyl methane diisocyanate with mass portion of NCO-groups making 15Ç17% and dynamic viscosity at the temperature of (203)C - 3Ç10 Pas, and the component it hardens with active atoms of hydrogen with hydroxyl number making 95Ç105 mgKOH/g, mass portion of total titrated nitrogen of 4.2Ç4.5%, containing a mixture of simple or complex polyester diol with molecular weight of 800Ç1000 c.u., sterically hindered diamine with amine number of 12Ç16.7%, oxypropylated ethylene diamine with hydroxyl number of 640Ç800 mgKOH/g and liposoluble organic pigments, at the ratio of isocyanate prepolymer to a component with active atoms of hydrogen, which ensures hardening of a thick-layer external coating until the required level of operational characteristics is produced. ^ EFFECT: coating ensures high level of adhesion, resistance to cathode lamination with preservation of the main physical-mechanical indices and ecological safety in process of insulation works. ^ 3 tbl |
