Quickly cured anaerobic plane sealant and initiator composition and preparation method

A flat sealing and rapid curing technology, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve the problems of decreased storage stability, difficulty in fast and effective curing, etc., to ensure stability, promote anaerobic adhesive curing, Fast and good curing effect

Inactive Publication Date: 2015-02-18
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, anaerobic adhesives based on conventional technology are difficult to cure quickly and effectively when used on inert metal surfaces such as aluminum (aluminum alloy). Stability is also greatly reduced

Method used

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  • Quickly cured anaerobic plane sealant and initiator composition and preparation method
  • Quickly cured anaerobic plane sealant and initiator composition and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Mix 80 parts (parts by mass, the same below) of polyurethane methacrylate oligomer with a viscosity of 4000~20000 mPa·s at 25°C, 10 parts of hydroxyethyl methacrylate, 5 parts of methacrylic acid, 15 parts of methyl Isobornyl acrylate is put into the reactor, and at a speed of 250 rpm, 0.001 part of stabilizer naphthoquinone, 0.001 part of metal chelating agent EDTA sodium salt, 2 parts of o-benzoylsulfonimide, 0.8 part of N- Acetyl phenylhydrazine, stirred for 2 hours until completely dissolved. Then add 1 part of deionized water, 1 part of dimethyl sulfoxide, and 3 parts of cumene hydroperoxide, and stir for 10 to 20 minutes until uniform. Then add 8 parts of polyethylene powder and 2.5 parts of fumed silica, stir at 800 rpm for 20~40 minutes until uniform, and then vacuum at -0.08~-0.10MPa at 15 rpm After 10-20 minutes, the material can be discharged after the inspection performance is qualified, and it is packed in a low-density polyethylene tube.

Embodiment 2

[0043] Mix 70 parts (parts by mass, the same below) of polyurethane methacrylate oligomer with a viscosity of 25,000~30,000 mPa·s at 25°C, 7 parts of hydroxyethyl methacrylate, 4 parts of methacrylic acid, 11 parts of methyl Isobornyl acrylate and 5 parts of 2-phenoxyethyl acrylate are put into the reactor, and at a speed of 250 rpm, 0.001 part of stabilizer naphthoquinone, 0.001 part of metal chelating agent EDTA sodium salt, 1.5 parts of o-phthalic acid Formylsulfonimide, 0.5 parts of N-acetylphenylhydrazine, stirred for 2 hours until completely dissolved. Then add 1 part of deionized water, 1 part of dimethyl sulfoxide, and 0.5 parts of 3 parts of cumene hydroperoxide, and stir for 10 to 20 minutes until uniform. Then add 8 parts of polytetrafluoroethylene powder and 2 parts of gas phase white carbon black, stir at 800 rpm for 20~40 minutes until uniform, and then at 15 rpm at a vacuum of -0.08~-0.10MPa Vacuumize for 10-20 minutes, after the inspection performance is quali...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J11/06C09J11/04
Inventor 韦震宇黄海江胡东昇
Owner TONSAN ADHESIVES INC
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