Double-component solvent-free damping coating and its preparation method

Abstract

The invention relates to a double-component solvent-free damping coating and its preparation method. The method comprises the following steps: 1, paint preparation: uniformly stirring and mixing a modified epoxy resin and a standard epoxy resin, adding an antifoaming agent, continuously uniformly stirring, sequentially adding composite sheet mica, 400 mesh calcium carbonate, graphite powder, the antifoaming agent and a dust preventive, uniformly stirring, grinding twice through using a three-roll machine, and examining the viscosity to obtain the paint of the solvent-free damping coating when the viscosity satisfies a case that no flowing appears after the scraping of 5mm of a coat; 2, curing agent preparation: adding an epoxy curing agent into talcum powder under stirring, and continuously stirring for 1-2h to obtain a uniform slurry which is the curing agent of the solvent-free damping coating; and 3, coating preparation: uniformly mixing the paint obtained in step 1 with the curing agent obtained in step 2 according to a weight ratio of the paint to the curing agent of 2:1 to obtain the solvent-free damping coating. Compared with coatings prepared through the prior art, the coating prepared in the invention has the advantages of easy construction, zero content of VOC, curing at normal temperature, high loss factor, high corrosion and vibration resistances, and the like.

Description

technical field [0001] The invention relates to a coating, in particular to a two-component solvent-free damping coating and a preparation method thereof. Background technique [0002] Damping coating is a new type of functional material capable of absorbing vibrational mechanical energy. The engines or electromechanical equipment of various mechanical equipment or transport vehicles will produce different degrees of vibration and noise when they are running, and these vibrations and noise will cause harm to the environment and personnel. Damping anti-vibration and noise reduction technology is one of the methods to effectively control vibration and noise. At the same time, these facilities operate in different environments and even in high-temperature and high-humidity environments, so these anti-noise materials must have excellent anti-corrosion effects and high-temperature resistance effects. [0003] my country has developed and produced damping materials since the 196...

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Problems solved by technology

[0003] my country has developed and produced damping materials since the 1960s, among which the patent number CN9110548407, the name of the invention is "a flame-retardant damping coating layer constituting a constrained damping structure, but this coating has the following disadvantages: ① The strength of the constrained layer is low, and it is often damaged at high temperatures. Cracking under the stress cycle, so as to meet the performance requirements of vibration reduction and noise reduction of the material; ②It synthesizes the constrained layer and the damping layer, and the construction process is relatively complicated. Free damping material for shock absorption and noise reduction on the vibrating surface, but its damping wet area is wide, the composite loss factor is 0.05-0.08, and the damping performance is low

Patent No. CN101955711A, the title of the invention is "a quick-drying water-based damping coating and its preparation method", which provides a preparation method for water-based damping coatings, but generally speaking, the corrosion resistance of water-based coatings on metal substrates is not as good as that of oily coatings

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