Anti-chloride-ion-permeation flexible fluororesin coating for concrete surface and preparation method thereof

Abstract

The invention discloses an anti-chloride-ion-permeation flexible fluororesin coating for a concrete surface and a preparation method thereof, and belongs to the field of coatings. According to the method, a component A comprises a wetting dispersant, a rheological additive, a coloring weather-proof pigment, modified surface treatment bismuth oxide, an organic solvent, fluororesin with medium hydroxyl content, modified polyol, a leveling agent and an anti-foaming agent, and a component B comprises a solvent, a dehydrating agent and an isocyanate curing agent. The anti-chloride-ion-permeation flexible fluororesin coating for a concrete surface is high in fluorine content, has ultra-high weather resistance and stain resistance, is high in coating elongation at break, high in tensile strength and good in chloride ion penetration resistance, and can maintain flexibility for a long time after the coating is aged.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a chloride ion penetration-resistant flexible fluororesin coating for concrete surfaces and a preparation method thereof. Background technique [0002] According to incomplete statistics, the dangerous water conservancy projects in my country's water conservancy projects account for about 50% of the total number of projects, and the corrosion of steel bars is one of the main diseases of water conservancy projects: According to the investigation of the use and damage of coastal seaport projects in my country, the seaport Structural damage in ocean engineering and marine engineering is very serious and common. Many upper concrete structures in the splash zone that have been used for more than 10 years have serious cracking due to corrosion of steel bars. In coastal hydraulic projects, the corrosion of engineering steel bars is mainly caused by chloride salts. caused by pollution. In the inla...

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Problems solved by technology

[0005] At present, some enterprises have launched flexible fluorocarbon coatings one after another, but there are still many technical defects in the products, mainly: 1) The coating prepared by the coating is used in a corrosive environment, and the elongation at break after ultraviolet exposure and environmental aging 2) The anti-chloride ion penetration ability of the coating is insufficient, and the chloride ion penetration cannot be effectively prevented in the coating structure of the protective concrete, resulting in premature corrosion of steel bars and further cause concrete to deteriorate

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