Multifunctional self-repairing polyurethane reticulate pattern coating and preparation method thereof

Abstract

The invention provides a multifunctional self-repairing polyurethane reticulate pattern coating and a preparation method thereof. The multifunctional self-repairing polyurethane reticulate pattern coating is prepared from the following raw materials in parts by weight: 30 to 40 parts of hexanediol polycarbonate, 20 to 30 parts of isophorone diisocyanate, 5 to 10 parts of dimethylolpropionic acid,2 to 2.5 parts of triethylamine, 0.5 to 1 part of diethylene glycol, 0.2 to 0.5 part of hydrazine monohydrate, 20 to 25 parts of a nano active matter-bimetal layered polymer, 20 to 25 parts of a metalinorganic salt-porous material, 7-10 parts of a leveling agent, and 5-10 parts of a pigment. Two different nano containers are used for respectively packaging two inhibitors aiming at different corrosion triggering mechanisms and protection mechanisms; and moreover, polycarbonate adipate into which a carbonate part is introduced is used as a matrix of the polyurethane coating, and meanwhile, acid-base, microorganism and rainwater residues are resisted, so that the polyurethane coating has the characteristics of good ageing hydrolysis resistance, oil resistance, weather resistance and microorganism decomposition corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of weather-resistant paint production, and in particular relates to a multifunctional self-repairing polyurethane textured paint and a preparation method thereof. Background technique [0002] Corrosion is the reaction in which metal interacts with surrounding media (such as water, air, salt, microorganisms) in the environment, triggers chemical or electrochemical changes, and destroys itself. Metal corrosion is not only manifested in loss of luster and rust in appearance, but also in reduced strength, reduced ductility, and increased resistance. Corrosion has caused a lot of inconvenience to our daily life. Problems such as rusting of iron pans, falling of metal balconies due to corrosion, rupture of metal water pipes due to corrosion, and even leakage of natural gas pipelines due to corrosion all have an impact on our economy and safety. The survey shows that metal corrosion causes direct losses to the U...

AI Technical Summary

Problems solved by technology

[0005] Although the principle used is that the external trigger mechanism triggers the release of the self-healing components from the nanocontainer, the trigger mechanism is only for the external corrosive substances when the pH increases when they contact the coating, and for the acidic external corrosive substances or At the same time, when acidic and alkaline corrosive substances contact different positions of the coating, the coating cannot be fully protected, and the released self-healing components are only protected by forming a passive protective film at the corrosion site.

Images