Moisture-curable anaerobic adhesive and preparation method thereof

An anaerobic adhesive, moisture curing technology, applied in the direction of adhesive, adhesive type, polyurea/polyurethane adhesive, etc., can solve the problem of large coating area of ​​anaerobic adhesive

Pending Publication Date: 2019-08-16
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem in the prior art that the anaerobic adhesive coating area is too large or overflows from the bonded gap, it is difficult to solidify due to long-term exposure to oxygen in the air and remains viscous liquid, and a method that can be provided An anaerobic adhesive that quickly cures and dries on the surface of the workpiece

Method used

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  • Moisture-curable anaerobic adhesive and preparation method thereof
  • Moisture-curable anaerobic adhesive and preparation method thereof
  • Moisture-curable anaerobic adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1

[0062] (1) Synthetic component a: prepolymer Y-1

[0063] ① Add 100g of macromolecular diol POL-3112T to a 500ml four-neck flask, stir at 200r / min, heat up to 100-110°C, vacuumize and dehydrate for 2 hours, and the vacuum degree is 0.07-0.1MPa;

[0064] ②Reduce the temperature in step ① to 50-60°C, add 86.7g of isocyanate monomer CDMDI-100L and 0.3g of catalyst dioctyltin dilaurate at one time, protect with nitrogen, and keep warm at 50-60°C for 2 hours;

[0065] ③Add 9g of small molecule polyol 1,4-butanediol to step ②, heat up to 70-80°C and keep warm for 3h; stop nitrogen, add 50g of reactive diluent isobornyl acrylate IBOA, stir at 200r / min for 10min, and discharge The obtained prepolymer Y-1 was sealed and kept until use.

[0066] The appearance of Y-1 is light yellow and transparent, the viscosity is 2060mPa·s.

[0067] Note: POL-3112T is polybutylene adipate, molecular weight 1000, and the manufacturer is Qingdao Xinyutian Chemical Co., Ltd.; CDMDI...

Embodiment 2

[0072] (1) Synthetic component a: prepolymer Y-1, same as Y-1 in Example 1.

[0073] (2) Preparation of moisture-curable anaerobic adhesive SYJ-2

[0074] In a 1L four-necked flask, one of the mouths of the flask was connected to the atmosphere, and 225g of polyurethane acrylic resin RS 1862, 200g of isobornyl acrylate IBOA, 0.3g of hydroquinone, and 0.6g of supernatant were added under the state of stirring at a rate of 300r / min. Dicumyl oxide, 0.6g N,N-diethyl-p-toluidine, 0.6g sodium saccharin, stir at 300r / min for 15min; add 75g of prepolymer Y-1, seal the flask, and stir at 300r / min for 5min. The appearance of SYJ-2 is slightly yellow and transparent, and the viscosity is 1254mPa·s.

Embodiment 3

[0076] (1) Synthetic component a: prepolymer Y-2

[0077] ①In a 2000ml four-necked flask, add 572.7g of isocyanate monomer HT-100, 90g of small molecular unit alcohol n-butanol, stir at 200r / min, protect with nitrogen, heat up to 50-60°C for 2h;

[0078] ② Add 500g of vacuum dehydrated macromolecular polycarbonate diol PCDL T5651, 1.5g of catalyst dioctyltin dilaurate to step ① and heat it up to 70-80°C for 3 hours; stop nitrogen, add 200g of active diluent acrylic acid Stir at 200r / min for 10min after isobornyl IBOA, and discharge to obtain prepolymer Y-2, which is sealed and stored until use.

[0079] The appearance of Y-2 is clear and transparent, and its viscosity is 3170mPa·s.

[0080] Note: HT-100 is hexamethylene diisocyanate trimer, manufactured by Wanhua Chemical Group Co., Ltd.; PCDL T5651 is polycarbonate diol, molecular weight 1000, manufactured by Asahi Kasei Corporation.

[0081] (2) Preparation of moisture-curable anaerobic adhesive SYJ-3

[0082] In a 1L fou...

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Abstract

The invention relates to a moisture-curable anaerobic adhesive and a preparation method thereof. According to the present invention, when a metal material is adhered, the closed anoxic environment ofthe adhered surface can cause a chemical reaction between the isocyanate group-containing monomer pr prepolymer in an anaerobic adhesive and the polar group on the surface of the metal substrate to generate bridging effect so as to improve the initial adhesion of the anaerobic adhesive to the metal substrate, and the(meth)acryloyloxy group contained in the anaerobic adhesive is subjected to rapidradical polymerization, and the monomer or prepolymer containing more than or equal to 2 isocyanate groups in the system can provide plasticizing effect to maintain the adhesion of the system at a high level so as to achieve the effects of curing and firm adhesion, such that the bonding strength of the anaerobic adhesive is greatly improved; and a small amount of the isocyanate group contained inthe moisture-curable anaerobic adhesive overflowing from the seam of the adhered surface chemically reacts with the water in the air to dry the surface, such that the defect of the contamination on the metal material is avoided while the excess curing glue can be conveniently cut off by using a cutter blade.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a moisture-curable anaerobic adhesive and a preparation method thereof. Background technique [0002] The main components of anaerobic adhesives are anaerobic unsaturated resins, active monomers and catalysts. After being prepared into finished products, they are packed in polyethylene plastic bottles. They are liquid in the environment of oxygen inhibition and have good properties. Stability, can be stored for a long time. It maintains a liquid state before the two metal tight fitting parts are assembled. When the metal tight fitting assembly glue enters the joint surface and gap of the workpiece, due to the isolation from the oxygen molecules in the air, the molecular structure in the glue changes. , the glue changes from liquid to solid. This liquid-solid conversion not only eliminates leak paths, but also enhances the strength and durability of assemblies; in addition, it enables m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J175/06C09J175/04C09J11/06C08G18/79C08G18/66C08G18/42C08G18/32C08G18/44
CPCC08G18/3206C08G18/4238C08G18/44C08G18/792C08G18/797C09J11/06C09J175/14C08L75/06C08K5/46C08L75/04
Inventor 苟小青曹亚成顾斌张玉兴何庆迪营飞蔡青青戚剑彭少雄
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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