Wear-resistant epoxy glue and preparation method thereof

Abstract

The invention relates to wear-resistant epoxy glue and a preparation method thereof. The epoxy glue is prepared by mixing a component A and a component B based on a weight ratio of (100:11.1)-(100:13.3), wherein the component A comprises the following raw materials in parts by weight: 10-20 parts of liquid epoxy resin, 10-20 parts of bisphenol F epoxy resin with modified nano rubber particles, 2.5-5 parts of epoxy resin activity diluent, 0.5-1.0 part of coupling agent, 53-61 parts of aluminum oxide ceramic microsphere, 4-6 parts of white alundum powder, 3-5 parts of glass fiber powder, 0.5-1.2 parts of chopped nylon fiber and 1-2 parts of gas-phase silicon dioxide; and the component B comprises the following raw materials in percentage by weight: 55-65 parts of polyamide, 12-18 parts of isophorone diamine, 4-7.5 parts of AEPHP (N-Aminoethylpiperazine), 1-2 parts of solidification accelerating agent, 8-10 parts of kaolin, 3-6 parts of glass fiber powder and 3-5 parts of gas-phase silicon dioxide. The preparation method comprises the following steps: preparing the bisphenol F epoxy resin with modified nano rubber particles; respectively preparing the component A and the component B;and mixing the component A and the component B in proportion when the epoxy glue is used.

Description

technical field [0001] The invention relates to a wear-resistant epoxy glue and a preparation method thereof, belonging to the technical field of adhesives. Background technique [0002] In the washing equipment and piping system of mines, smelting, power plants, etc., the erosion and abrasive wear of the equipment and the inner wall of the pipeline caused by the slurry are very serious. The use of lining ceramic sheets and polyurethane coatings is a common wear-resistant protection method; however, the method of lining ceramic sheets, because the inner walls of equipment and pipelines are mostly curved, ceramic sheets are difficult to mount tightly, and are easy to cause damage under the impact of ore. Spraying polyurethane coating cannot form a thicker coating, and it is difficult to resist the impact and abrasive wear of heavy-duty ore; and both are difficult to quickly repair the damaged part on site. [0003] For the on-site repair and pre-protection of worn equipment,...

AI Technical Summary

Problems solved by technology

These methods often bring about a decrease in the thermal stability of the epoxy cured product, resulting in a decrease in the glass transition temperature, poor aging resistance, low impact strength and wear resistance; and because these toughened materials have greater viscosity force, causing the viscosity of the epoxy resin to increase, so that the wear-resistant adhesive made will be drawn at high temperature and hard at low temperature, and will easily collapse and flow when the curing reaction releases heat, resulting in poor construction and difficulty in ensuring the repair size

[0005] The epoxy resin is modified with ultra-fine fully vulcanized carboxylated nitrile rubber particles, which has excellent toughening and impact resistance effects; but the particle size reaches 50-100nm, and has a large specific surface area and surface energy. It is an agglomerated powder, and it is difficult to disperse the agglomerated particles in the epoxy resin into a primary particle state by conventional methods such as stirring and three-roll grinding; the agglomerated rubber particles added to the resin in this way only act as an unstable filler. The effect of nanoparticles is completely lost, and there is no toughening effect. On the contrary, the viscosity of the resin will be greatly increased, the adhesion to the substrate will be low, and the performance of the adhesive will also decrease.

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