Anaerobic adhesive as well as preparation method and application thereof

Abstract

The invention relates to the field of adhesives, in particular to an anaerobic adhesive and a preparation method of the anaerobic adhesive. The anaerobic adhesive comprises 40-100 parts of modified methacrylic acid, 0.8-5 parts of an initiator, 1-4 parts of an accelerant and 0.5-2 parts of an accelerant aid. According to the anaerobic adhesive, polyurethane modified epoxy resin is adopted to modify methacrylic acid, and the preparation method specifically comprises the following steps: adding the polyurethane modified epoxy resin into a reaction kettle, heating to be 60-65 DEG C, adding hydroquinone, adding methacrylic acid when hydroquinone is completely dissolved, continuously heating to be 70-80 DEG C, adding triethylamine, uniformly mixing, heating to be 80-85 DEG C, reacting for 1-3 hours, further heating to be 98-100 DEG C, and reacting for 2-4 hours, so as to obtain the modified methacrylic acid. The anaerobic adhesive provided by the invention is good in toughness and low-temperature resistance, and is also relatively high in tension strength, shearing resistance and impact resistance.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to an anaerobic adhesive, a preparation method and an application. Background technique [0002] Anaerobic adhesives refer to solid polymers that do not solidify when in contact with oxygen or air, and quickly polymerize to become crosslinked once the air is shut off. The so-called "anaerobic" means that the glue is isolated from oxygen when in use. [0003] Anaerobic adhesives are mainly composed of acrylate monomers, initiators, accelerators, and stabilizers, and other additives such as fillers, dyes and pigments, thickeners, plasticizers, thixotropic agents, and ultraviolet light can also be added as needed. Absorbent etc. [0004] Acrylic monomers are the main components of anaerobic adhesives, accounting for more than 90% of its total proportion. Such monomers include acrylic acid, methacrylic acid diester or some special acrylates (methacrylic acid hydroxy Propyl ester), etc. [0...

AI Technical Summary

Problems solved by technology

[0006] (1) Epoxy acrylate formed by acrylic acid or methacrylic acid and epoxy resin, this type of monomer has good temperature resistance, medium resistance, high bonding strength, but poor impact toughness

[0007] (2) Acrylic urethane formed by hydroxyethyl methacrylate or hydroxypropyl ester and isocyanic acid compound. This type of monomer has good low temperature resistance and impact resistance, but the strength is not high and medium resistance Poor performance, especially acid and alkali resistance is often not as good as epoxy type

[0008] The toughened anaerobic adhesives currently on the market are often compounded by the above two types of monomers, but the compatibility is poor, the viscosity is high, and the synthesis process of acrylic urethane is immature, so it is urgent to develop a new anaerobic adhesive