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Fast-curing high-strength epoxy adhesive

An epoxy adhesive, fast curing technology, applied in the direction of polymer adhesive additives, adhesive types, adhesives, etc. The problem of poor bonding strength, etc., can meet the needs of bonding, realize the requirements of rapid installation and maintenance, and improve the bonding strength.

Active Publication Date: 2021-10-26
GUANGDONG HENGDA NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is known that the insulation resistance of existing epoxy resin adhesives is generally higher than that of acrylic two-component adhesives
At the same time, the existing room temperature curing epoxy resin adhesives also have the following disadvantages: the adhesive with high bonding strength takes a long time to cure at a temperature of 5-38 ° C, or needs to be heated and cured; it can realize fast curing at room temperature The cured adhesive has poor bonding strength at 2 to 4 hours and 24 hours, which cannot meet the bonding requirements of rail glued insulating joints

Method used

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  • Fast-curing high-strength epoxy adhesive
  • Fast-curing high-strength epoxy adhesive
  • Fast-curing high-strength epoxy adhesive

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A fast-curing high-strength epoxy adhesive, comprising A component and B component, the A component includes the following components by weight: 60-100 parts of epoxy resin, 1-10 parts of epoxy diluent parts, 30-60 parts of toughening composition, 5-50 parts of filler and 1-5 parts of thixotropic agent; said B component includes the following components by weight parts: 30-70 parts of amine curing agent, curing accelerator 1-20 parts of agent, 1-20 parts of filler and 1-5 parts of thixotropic agent.

[0040]Wherein, the above-mentioned toughening composition is a composition of a closed polyurethane prepolymer and a core-shell rubber dispersion, and the weight ratio of the two is 1:3-3:1.

[0041] Wherein, the above-mentioned blocked polyurethane prepolymer is obtained by reacting polyether polyol with excess isocyanate, and then blocking isocyanate with phenols.

[0042] Among them, the above polyether polyol is a polymer or copolymer of one or more of polyoxypropylen...

Embodiment 2- Embodiment 7

[0054] According to the A component and the B component provided in Example 1, the components of the high-strength epoxy adhesive are proportioned, wherein the epoxy resin is preferably bisphenol A type epoxy resin NPEL-128;

[0055] The epoxy diluent is C12-14 alkyl glycidyl ether (AGE);

[0056] The closed polyurethane prepolymer adopts the closed polyurethane prepolymer of Desmocap11A, Desmocap12A and Desmocap14CNB models;

[0057] The model of the core-shell rubber particle dispersion is MX125;

[0058] The filler is 1002 silica powder, the thixotropic agent is fumed silica, and the model is TS-720;

[0059] The curing accelerator is 2,4,6-tris(dimethylaminomethyl)phenol, K54.

[0060] The specific component ratio of the high-strength epoxy adhesive of embodiment 2-embodiment 7 is as follows:

[0061]

[0062] The preparation method of the high-strength epoxy adhesive of above-mentioned embodiment 2-embodiment 7 is:

[0063] The preparation method of component A: ta...

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Abstract

The invention discloses a fast-curing high-strength epoxy adhesive which comprises a component A and a component B. The component A comprises the following components in parts by weight: 60-100 parts of epoxy resin, 1-10 parts of an epoxy diluent, 30-60 parts of a toughening composition, 5-50 parts of filler and 1-5 parts of a thixotropic agent. The component B is prepared from the following components in parts by weight: 30 to 70 parts of amine curing agent, 1 to 20 parts of curing accelerator, 1 to 20 parts of filler and 1 to 5 parts of thixotropic agent. According to the fast-curing high-strength epoxy adhesive, the blocked polyurethane prepolymer and the core-shell rubber particle dispersion liquid are compounded and combined to be used as a toughening agent, so that the impact toughness of the adhesive is improved while the shear strength is rapidly established.

Description

technical field [0001] The invention relates to the technical field of epoxy resin adhesives, in particular to a fast-curing high-strength epoxy adhesive. Background technique [0002] With the development of railway speed-up and track modernization, rail glued insulation technology has been widely used in railway track laying. The glue used for rail glued insulation joints is usually an epoxy resin adhesive. For example, Beijing Institute of Aeronautical Materials and Shanghai Railway Bureau Technology Center have reported an epoxy structural adhesive for rail joints. This adhesive It needs to be heated and cured, and cannot be used for on-site installation and maintenance of rail glued joints. [0003] The Chinese patent with the publication number CN1015468B reports a modified acrylic two-component adhesive for bonding rails, which can be quickly cured and can realize field construction operations for bonding rail joints, but does not mention bonding The insulation resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J11/08C08G59/50
CPCC09J163/00C09J11/08C08G59/504C08G59/5006C08L2207/53C08L75/08C08L9/00C08L9/06C08L33/04C08L83/04
Inventor 杨伟胜周志杰陈天来关怀周为民
Owner GUANGDONG HENGDA NEW MATERIALS TECH
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