Scratch-coated polyurea elastomer corrosion-resistant and wear-resistant material and preparation method thereof

Abstract

The invention discloses a scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material and a preparation method thereof. The scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material is characterized by comprising an ingredient A and an ingredient B, wherein the ingredient A is prepolymers with NCO end groups obtained through the reaction between 30 to 40 mass percent of polyether polyol and 60 to 70 mass percent of polyisocyanates; the ingredient B is prepared from 30 to 40 mass percent polyaspartic acid ester, 60 to 70 mass percent of filling materials and a small number of auxiliary agents through high-speed dispersion grinding. In the use process, the prepared ingredient A and the prepared ingredient B are weighed according to the weight ratio of 1:4, and are then uniformly mixed; next, scraping coating construction is performed. The material has the characteristics of high mechanical intensity, corrosion resistance, wear resistance, good anti-seeping performance, aging resistance, proper reaction speed, no solvent, convenient construction and the like. The scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material is particularly suitable for industrial and mining enterprise equipment and spare part anti-corrosion wear-resistant liners.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to a method for preparing a scratch-coated polyurea elastomer corrosion-resistant and wear-resistant material. Background technique [0002] In industrial and mining enterprises, a large number of equipments operate in the abrasive environment of corrosive media and fluid media containing solid particles. Due to the harsh environment, the service life of equipment and spare parts is greatly reduced, which directly leads to corrosion and wear damage of equipment, and reduces the operating efficiency of equipment. , Abnormal downtime, etc. lead to a substantial increase in production costs, and the generation of waste equipment and spare parts also leads to a waste of resources. To solve the above problems, the methods currently used mainly include: lining the interior of the equipment with ceramic tiles, rubber glass fiber reinforced plastics, anti-corrosion coat...

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Problems solved by technology

However, these methods have different disadvantages: lining ceramic tiles is difficult to construct, the cement is easy to age, and ceramic tiles are easy to fall off under strong impact conditions; lining rubber, because rubber is a non-polar substance, the bonding strength with the substrate is low. , easy to delamination and bubbling; FRP is prone to bulging and leakage due to its fiber conductivity, which affects the overall anti-corrosion and wear resistance; most of the anti-corrosion coatings contain solvents, which reduces the adhesion and impermeability; equipment When the anti-corrosion and wear-resistant materials such as stainless steel and titanium alloy are used for spare parts, the anti-corrosion and wear-resistant performance will be significantly improved, but the cost will also be significantly increased, which is not conducive to large-scale promotion and use.

Although the current spray polyurea elastomer (SUPA) exhibits many superior properties, it also shows certain problems during use, such as the reaction speed is too fast, the gel time is only a few seconds to tens of seconds, and special spraying equipment is required Construction, it is more difficult to construct on a small area or irregular surface, and the construction effect is poor; due to the fast reaction time, the wettability between the construction material and the substrate is deteriorated, and the bonding strength of the material is reduced; due to the fast reaction speed , the reaction heat release is concentrated, resulting in a large thermal shrinkage rate and large internal stress, which reduces the overall performance of the material

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