A kind of ultra-low temperature curing epoxy anticorrosion coating

Abstract

The invention discloses an ultra-low temperature curing epoxy anticorrosion coating. The ultralow temperature curing epoxy anticorrosion coating is composed of two components A and B. The component A is composed of film-forming resin, auxiliary agent, filler, pigment and deionized Composed of water, the film-forming resin is composed of 25-45 parts of bisphenol F epoxy resin, 20-40 parts of silane-modified epoxy resin, 2-4 parts of the auxiliary agent, and the filler includes nano-silica 15~25 parts and 2~10 parts of lignocellulose, the pigment is 3~5 parts of titanium dioxide, and the deionized water is 10~20 parts; the component B is a curing agent, consisting of 3~10 parts of phenalkamine, B It consists of 2~5 parts of diamine, 2~5 parts of polyamide and 5~10 parts of deionized water. The above formulation system can effectively improve the weather resistance of the coating, prevent cracking, and has the advantages of good anti-corrosion properties and high adhesion. The curing agent used is a mixed curing system with phenalkamine as the main body, which can effectively Accelerate the reaction speed of epoxy resin, reduce the curing reaction temperature and reduce the curing energy consumption.

Description

technical field [0001] The invention relates to the field of epoxy coatings, in particular to an ultra-low temperature curing epoxy anticorrosion coating. Background technique [0002] Epoxy coatings have excellent technological properties, mechanical properties and physical properties, and are widely used. However, commonly used epoxy resins have problems such as high viscosity and high curing temperature at room temperature. The curing temperature of conventional epoxy resin / anhydride systems is 180-200°C, and the curing time is 15-30 minutes. On the one hand, the temperature consumes a lot of energy, and on the other hand, it will affect the substrate with poor heat resistance, which limits its application on heat-sensitive substrates, resulting in a narrow application range; and limits the wide application of epoxy resin. Moreover, since the coating film of epoxy coatings will expand or shrink with the change of ambient temperature, this kind of thermal expansion and co...

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Problems solved by technology

However, commonly used epoxy resins have problems such as high viscosity and high curing temperature at room temperature. The curing temperature of conventional epoxy resin / anhydride systems is 180-200°C, and the curing time is 15-30 minutes. On the one hand, the temperature consumes a lot of energy, and it will affect the substrate with poor heat resistance, which limits its application on heat-sensitive substrates, resulting in a narrow application range; and limits the wide application of epoxy resin

Moreover, since the coating film of epoxy coatings will expand or shrink with the change of ambient temperature, this kind of thermal expansion and contraction will easily lead to easy cracking of the coating film. If it is applied in an outdoor environment, it will easily cause the film layer to be corroded and the color of the coating will change color. , Adhesion reduction, peeling and other disadvantages

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