Quickly cured anaerobic plane sealant and initiator composition and preparation method

Abstract

The invention relates to an anaerobic plane sealant which has an effect of increasing the curing speed on an aluminum and aluminum alloy material, and a preparation method of the anaerobic plane sealant. The invention mainly provides a novel approach of promoting the curing speed of the anaerobic plane sealant on aluminum and aluminum alloy without influencing the storage stability. The method comprises the step of adding a proper amount of water and dimethyl sulfoxide into an anaerobic curing sealant containing polyurethane-methacrylate prepolymer, free radical polymerizable monomer, organic peroxide, an accelerant and a stabilizer. The preparation method provided by the invention is simple and convenient, and the anaerobic plane sealant has excellent storage stability, and can still be used for quickly well adhering aluminum and aluminum alloy at a low-humidity environment.

Description

technical field

[0001] The invention relates to an anaerobic curing planar sealant and an initiator composition that has good adhesion to aluminum (aluminum alloy), has the advantages of increased curing speed, good storage stability, and forms a tough adhesive layer after curing, and is used in the automobile industry, etc. Field aluminum (aluminum alloy) flange surface sealing. Background technique

[0002] Anaerobic flat sealant is mainly used for sealing between flange faces with small gaps. Compared with silicone flat sealant, it has better solvent resistance, higher strength and thus can withstand greater pressure. In the presence of oxygen, anaerobic adhesives do not undergo polymerization and remain liquid due to the inhibition of oxygen. When the anaerobic adhesive existing between the two parts is bonded together, the contact area between the glue and oxygen becomes smaller and smaller, and the dissolved oxygen content in the glue becomes smaller and smaller, and ...

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