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Mercaptan -modified epoxy adhesive prepolymer capable of being quickly cured at room temperature, and preparation method thereof

An epoxy adhesive, fast curing technology, applied in the direction of adhesives, epoxy resin adhesives, adhesive types, etc., can solve the problems of limited application scope and low viscosity, and achieve the effect of easy purchase in the market, low cost and rich market.

Inactive Publication Date: 2019-12-20
SHANDONG EFIRM BIOCHEMISTRY & ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most mercaptans are small molecular substances with low viscosity and good fluidity, which greatly limits their application range in the field of adhesives

Method used

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  • Mercaptan -modified epoxy adhesive prepolymer capable of being quickly cured at room temperature, and preparation method thereof
  • Mercaptan -modified epoxy adhesive prepolymer capable of being quickly cured at room temperature, and preparation method thereof
  • Mercaptan -modified epoxy adhesive prepolymer capable of being quickly cured at room temperature, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A kind of mercaptan modified room temperature rapid curing epoxy adhesive prepolymer and preparation method thereof, the specific steps are as follows:

[0037] (1) Add 990g of pentaerythritol tetrakis(3-mercaptopropionate) and 5g of 2,4,6-tris(dimethylaminomethyl)phenol into the reaction kettle, stir at 15°C for 1h to disperse the two Uniformly, to obtain a mixture;

[0038] (2) Add 10g of 1,6-hexanediol diglycidyl ether to the mixture obtained in step (1), and then carry out vacuum degassing and stirring reaction at 25°C for 3 hours to obtain mercaptan-modified epoxy Resin adhesive prepolymers;

[0039] The mercaptan-modified epoxy resin adhesive prepolymer and epoxy resin were mixed at a mass ratio of 0.68:1 to verify the curing of the adhesive.

[0040] After testing, the thiol-modified epoxy resin adhesive prepolymer provided in Example 1 of the present invention has a mercapto group content of 26.1%, an epoxy value of 0.02, a viscosity of 860mpa*s, and a curing ...

Embodiment 2

[0042] A kind of mercaptan modified room temperature rapid curing epoxy adhesive prepolymer and preparation method thereof, the specific steps are as follows:

[0043] (1) Add 950g of pentaerythritol tetrakis(3-mercaptopropionate) and 5g of 2,4,6-tris(dimethylaminomethyl)phenol into the reaction kettle, stir at 25°C for 1h to disperse the two Uniformly, to obtain a mixture;

[0044] (2) Add 50g of 1,6-hexanediol diglycidyl ether to the mixture obtained in step (1), and then carry out vacuum degassing and stirring reaction at 25°C for 3 hours to obtain thiol-modified epoxy Resin adhesive prepolymers;

[0045] The thiol-modified epoxy resin adhesive prepolymer and epoxy resin were mixed at a mass ratio of 0.72:1 to verify the curing of the adhesive.

[0046]After testing, the thiol-modified epoxy resin adhesive prepolymer provided in Example 2 of the present invention has a mercapto group content of 25.6%, an epoxy value of 0.04, a viscosity of 7860mpa*s, and a curing time of ...

Embodiment 3

[0048] A kind of mercaptan modified room temperature rapid curing epoxy adhesive prepolymer and preparation method thereof, the specific steps are as follows:

[0049] (1) Add 900g of pentaerythritol tetrakis(3-mercaptopropionate) and 10g of 2,4,6-tris(dimethylaminomethyl)phenol into the reaction kettle, stir at 25°C for 1h to disperse the two Uniformly, get the mixture;

[0050] (2) Add 100g of 1,6-hexanediol diglycidyl ether to the mixture obtained in step (1), and then carry out vacuum degassing and stirring reaction at 50°C for 3 hours to obtain thiol-modified epoxy Resin adhesive prepolymers;

[0051] The mercaptan-modified epoxy resin adhesive prepolymer and epoxy resin were mixed at a mass ratio of 0.78:1 to verify the curing of the adhesive.

[0052] After testing, the mercaptan-modified epoxy resin adhesive prepolymer provided in Example 3 of the present invention has a mercapto group content of 25.1%, an epoxy value of 0.06, a viscosity of 13820mpa*s, and a curing ...

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Abstract

The invention belongs to the field of chemical engineering, and particularly relates to a mercaptan-modified epoxy adhesive prepolymer capable of being quickly cured at room temperature and a preparation method thereof. The mercaptan-modified epoxy adhesive prepolymer is composed of (1) a mercaptan compound containing two or more-SH structures; (2) terminated epoxy ether or terminated epoxy silicone oil or epoxy resin of which the terminal group contains two or more than two groups; and (3) an amine curing agent. The viscosity of the prepolymer can be adjusted according to actual application requirements, so that the application range of mercaptan in the adhesive industry is greatly expanded.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a mercaptan-modified room-temperature fast-curing epoxy adhesive prepolymer and a preparation method thereof. Background technique [0002] Epoxy resin adhesives are a class of engineering adhesives formulated from epoxy resin base materials, curing agents, diluents, accelerators and fillers. Because of its good bonding performance, good functionality, relatively low price, and simple bonding process, it has been widely used in household appliances, automobiles, water conservancy transportation, electronic appliances, and aerospace industries in recent decades. With the continuous development of high-tech and nanotechnology, in recent years, the modification of epoxy resin has been deepened, and methods such as interpenetrating network, chemical copolymerization and nanoparticle toughening have been widely used. There are more and more varieties of performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C08G59/14
CPCC08G59/1483C08L2205/025C09J163/00C08L63/00
Inventor 梁万根张超崔卫华费潇瑶宋吻吻孔凡波
Owner SHANDONG EFIRM BIOCHEMISTRY & ENVIRONMENTAL PROTECTION CO LTD
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