Recoating type universal epoxy anticorrosive paint for achieving four-season constructions with single curing agent

Abstract

The invention discloses a recoating type universal epoxy anticorrosive paint for achieving four-season constructions with a single curing agent. A low molecular weight bisphenol A epoxy resin is usedas a resin base, a solvent system of an reactive diluent with branched chains, such as a glycidyl ether type reactive diluent, is introduced into the formulation to form an effective steric effect andprolong the usable life of a product after mixing, and after a coating layer is formed, the curing speed is not influenced, so the construction at the environment temperature of between 10 DEG C below zero and 40 DEG C is achieved, and the problem of the four-season constructions is solved by using one curing agent. A nano anticorrosive pigment, a phenolic amine curing agent, an adhesion promoter, adjusting PVC and a proper amount of dimming powder are selected, and the coating layer is ensured to contain a proper amount of polar groups so that the product has good cathodic disbonding resistance and can be matched with various types of finishing paints. The recoating type universal epoxy anticorrosive paint can be used as an anticorrosive primer for a plurality of positions from a ship bottom to a hull, and has very significant functions of improving the efficiency and the benefit of ship painting.

Description

technical field [0001] This patent relates to an antirust paint, in particular to a recoatable general-purpose epoxy antirust paint which can be applied in all seasons with a single curing agent. Background technique [0002] The general-purpose epoxy antirust paint can be applied to various parts of the ship from the bottom to the hull and the cabin, and can be matched with the cathode control and most of the bottom paints. Its application can greatly reduce the variety of coatings used, thereby simplifying the coating process, improving the logistics system of the shipyard, reducing inventory, increasing production speed, increasing the proficiency of on-site workers and reducing loss, so as to ensure timely delivery of ships and enhance shipyard competition. ability target. [0003] General-purpose epoxy antirust paint has been approved by shipyards as soon as it was launched in this century, and has been widely used. At present, only international large-scale multinati...

AI Technical Summary

Problems solved by technology

[0005] Due to the strong reactivity of general low-temperature curing agents, when used at room temperature, the pot life of the coating after mixing is too short, causing workers to be unable to apply due to the short operating time; Too low activity and the coating dries too slowly to be applied

[0006] In terms of recoatability, although the shipyard hopes that the general-purpose epoxy antirust paint can be repainted and the restriction on the longest painting interval is lifted, but the products of individual manufacturers of general-purpose epoxy antirust paint on the market have achieved recoatability. The general-purpose epoxy coating products of most other manufacturers have a limit on the longest coating interval, which is usually 5-7 days at room temperature. If the longest coating interval is exceeded, the shipyard is often required to roughen the coating surface Increases adhesion between coats

There is no general-purpose epoxy anti-rust paint that can realize recoatability and a curing agent for four-season construction at the same time.

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