Low-temperature shock-resistant fluorocarbon finishing paint for bridges and preparation method thereof

Abstract

The invention discloses a low-temperature shock-resistant fluorocarbon finishing paint for bridges and a preparation method thereof. The finishing paint is composed of a component A and a component B, wherein the component A comprises the following components in parts by weight: 54-56 parts of trifluoro FEVE resin, 0-14 parts of diluter, 2.2-2.4 parts of dispersing agent, 25.5-29.8 parts of titanium white, 0.8-1.2 parts of thixotropic agent, 0.4-0.6 part of leveling agent, 0.8-1.2 parts of anti-ultraviolet absorbent and 0.3-0.8 part of silane coupling agent; the component B comprises the following components in parts by weight: 50 parts of isocyanate curing agent and 50 parts of diluter; and the weight ratio of the component A to the component B is 5:1. The paint can still have very high impact resistance at low temperature (-40 DEG C), has high glossiness and high gloss retention, and can be used as a bridge paint for cold areas.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a low-temperature impact-resistant fluorocarbon finish paint for bridges and a preparation method thereof. Background technique [0002] The composition of coatings mainly includes film-forming substances, pigments, solvents and additives. The film-forming substances are the basis of coatings. It has the function of bonding other components in the coating to form a coating film, and plays a decisive role in the properties of coatings and coating films. In modern coatings, resins are mostly used as film-forming substances. [0003] Resin, generally refers to unprocessed high molecular polymer, has the general characteristics of high molecular polymer. In a low temperature environment, the mobility of resin molecules is reduced, the movement of molecular segments becomes difficult, the resin loses its viscoelasticity, the yield stress becomes higher, and it is more prone to fracture under ...

AI Technical Summary

Problems solved by technology

[0004] In northern China, the temperature in winter can drop to minus 20 or 30 degrees. Under such climatic conditions, the physical properties of ordinary bridge coatings become very poor. It is easy to crack and fall off, and at these crack points, the steel substrate will be directly affected by corrosive media such as rainwater and oxygen due to the loss of coating protection, resulting in rust and gradual diffusion, resulting in corrosion pits on the surface of the substrate Or cracks, these cracks will further expand, causing stress corrosion cracking of the base material of the bridge, which brings great hidden dangers to transportation safety

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