Light cured alkali resistant coating

Abstract

A light cured alkali resistant coating is prepared from (by wt%) solid high polymer 10-30, light curing resin 10-70, reactive diluent 8-40, photoinitiator 0.5-5, assistant 0.1-2, and solvent in balance. The invention introduces solid high polymer into preparation raw material of current UV-light cured coating, and on the basis of original frame of UV-light cured coating, utilizes network structure constructed by solid high polymer acrylate high molecular chain, to thereby improve comprehensive anti-corrosive property of light cured coating effectively, especially improve alkali resistance of coating under thin coating condition.

Description

technical field [0001] The invention belongs to the technical field of ultraviolet curing coatings, in particular to a photocuring alkali-resistant coating. Background technique [0002] Ultraviolet curing coatings (UV curing coatings) use the energy of ultraviolet light to initiate polymerization and crosslinking reactions between low-molecular prepolymers or oligomers in coatings and monomer molecules as reactive diluents to obtain hardened paint films. Compared with traditional natural drying or heat-curing coatings, light-curing coatings have high energy utilization rate, suitable for heat-sensitive substrates, no pollution, fast film-forming speed, high-quality coating film, suitable for continuous large-scale production And other characteristics, known as environmentally friendly coatings. [0003] Existing UV-curable coatings are usually composed of oligomers, reactive diluents, photoinitiators and additives. Oligomers are also called photosensitive resins and oligom...

AI Technical Summary

Problems solved by technology

On the one hand, the main chain of the resin or monomer raw materials used in photocurable coatings is rich in ester groups, and the ester groups are prone to accelerated hydrolysis under alkaline conditions, thereby destroying the main chain structure of the coating film.

On the other hand, due to the characteristics of the photocuring technology itself, the rapid curing of the coating film can be achieved at room temperature, while the movement of molecular chains is limited at low temperatures, and the molecular chains cannot be fully fused and collided, resulting in the degree of reaction of double bonds. Not high, it is difficult to form a dense cross-linked network structure on the coating film

Chinese patent CN1014007650A on April 15, 2009 disclosed a UV-curable polyaniline anti-corrosion coating and its preparation method. The UV-curable polyaniline anti-corrosion coating uses polyaniline as the main anti-corrosion material. , polyaniline, fillers, photoinitiators, and additives are blended according to the ratio, stirred, ground, filtered, etc., to obtain a UV-curable polyaniline anti-corrosion coating, but the coating adopts a physical mixing method and cannot form a dense coating on the coating film. The cross-linked network structure cannot solve the alkali resistance bottleneck under the film

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