Solvent-free epoxy weight anticorrosion paint used for coated joints of steel buried pipeline

Abstract

The invention introduces a solvent-free epoxy weight anticorrosion paint used for coated joints of a steel buried pipeline, which comprises a component A and a component B; wherein the mass percentage of each raw material in the component A comprises: 30-45% of epoxy resin, 5-15% of glycidyl ether active diluent, 0.05%-1% of silicone defoamer, 20-35% of compound anti-rust pigment, 3-10% of other pigments, 5-15% of barium sulfate mineral filler, 10-20% of other mineral fillers and 0.3-1.5% of polyamide wax; the mass part of each raw material in the component B comprises: 10-25 parts of polyamide curing agent, 5-15 parts of Mannich base and 0.5%-2 parts of curing accelerator; and the mass ratio of the component A to the component B is 100 to 15-35. The paint provided by the present invention has the advantages of pure epoxy, environmental friendly performance and saved resource due to solvent-free property; and is capable of raising the anti-corrosive property, chemical resistance property and insulating property; and is capable of raising the toughness resistance, wear resistance and impact resistance of the coating by employing the mineral fillers.

Description

technical field [0001] The invention relates to an anti-corrosion paint, in particular to a solvent-free epoxy heavy-duty anti-corrosion paint for joint repair of steel buried pipelines. Background technique [0002] At present, the anti-corrosion coatings used for steel buried pipelines mainly include: petroleum asphalt, coal tar enamel, epoxy coal tar pitch, fusion bonded epoxy powder coating (FBE), extruded polyethylene, polyethylene tape and composite coating layer (including 3PE). Petroleum asphalt paint, epoxy coal tar pitch paint and its glass fiber cloth composite coating were widely used in early pipeline anticorrosion, but they were gradually eliminated due to solvents, environmental pollution, low construction efficiency, and high labor intensity. . Fusion-bonded epoxy resin coating has strong adhesion to steel pipes, good corrosion resistance in various environments, and high mechanical impact resistance, but poor water resistance and water vapor permeability r...

AI Technical Summary

Problems solved by technology

These filling methods have different technical shortcomings: among them, petroleum asphalt paint pollutes the environment and has poor temperature resistance; cold wrapping tape has anti-corrosion, poor adhesion, poor water resistance, low strength, and is greatly affected by the environment; powder epoxy coating has poor water resistance, Difficult construction; PE heat shrink construction is difficult, requires heat treatment, and high cost

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