A kind of preparation method of modified epoxy resin and its application in heavy-duty anti-corrosion coating

Abstract

The invention discloses a preparation method of modified epoxy resin and an application of the modified epoxy resin to a heavy anti-corrosion coating. The method includes the steps: by the aid of a multi-step feeding process, firstly, performing terminal hydroxyl modification on the epoxy resin; secondly, adding aliphatic isocyanate to perform modification; finally, adding diethanol amine to stopreaction to prepare polyurethane modified epoxy resin. The modified epoxy resin is used for the heavy anti-corrosion coating, compactness of an epoxy resin heavy anti-corrosion coating layer can be improved, cohesive property between film-forming resin and metal can be improved, and an anti-corrosion coating with better corrosion resistance is prepared.

Description

technical field

[0001] The invention belongs to the technical field of coatings, in particular to a preparation method of modified epoxy resin and its application in heavy-duty anti-corrosion coatings. Background technique

[0002] Various large-scale bridges, buildings, vehicles, machinery and equipment and other public facilities and production equipment made of steel are corroded by water, oxygen, sulfur, chlorine and other compounds in nature all the time, and are caused by steel rust every year. The economic losses amount to tens of billions of dollars; in order to protect steel from corrosion, coating anti-corrosion coatings is an important measure to prevent corrosion, such as: Chinese patent CN86104711 discloses an anti-corrosion coating and process, using epoxy modified chlorine chloride Butadiene rubber is the main film-forming substance, cyclohexanone and butyl acetate are solvents, mica iron oxide and red lead powder are antirust pigments, and T31 is used as a cu...

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