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Flexible epoxy structural adhesive and preparation method thereof

A technology of epoxy structural adhesive and flexibility, applied in the direction of epoxy resin adhesive, adhesive, adhesive type, etc., can solve the problems of flexibility change in the preparation of epoxy materials, and achieve good adhesion and good bending resistance. and damping performance, the effect of small initial viscosity

Inactive Publication Date: 2015-03-25
SHISHI GUOGAO ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But all these methods use polyetheramine only for epoxy resin curing, so as to achieve the effect of toughening, because the number of polyetheramine introduced in epoxy material is small, so it is not enough to make epoxy material Significant changes in flexibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of flexible epoxy structural adhesive, which is prepared by mixing component A and component B at a weight ratio of 100:40.

[0035] Add 30 parts of D2000 polyetheramine and 10 parts of D400 polyetheramine to 80 parts of JX021 epoxy resin, continue to stir for 15 minutes, and obtain modified polyetheramine after 48 hours at room temperature; mix 15 parts of 6002 epoxy resin, Mix 40 parts of modified polyetheramine and 20 parts of 5748 reactive diluent evenly under stirring to obtain component A; add 2 parts of 554 accelerator to 30 parts of 5506 curing agent under stirring, and then stir for 15 minutes to obtain group B Parts; Mix the raw materials of the above two components A and B evenly to obtain a flexible epoxy structural adhesive.

[0036] The initial viscosity of the flexible epoxy structural adhesive is 6200cps, it can be cured within 5 days at room temperature, and the pot life is more than 120 minutes. The flexibility of the sample is go...

Embodiment 2

[0038] A preparation method of flexible epoxy structural adhesive, which is prepared by mixing component A and component B at a weight ratio of 100:38.

[0039] Add 20 parts of D2000 polyetheramine and 20 parts of D400 polyetheramine to 100 parts of 5749 epoxy resin, continue to stir for 15 minutes, and obtain modified polyetheramine after standing at room temperature for 48 hours; mix 20 parts of 6002 epoxy resin, Mix 50 parts of modified polyetheramine and 10 parts of 5748 reactive diluent evenly under stirring to obtain component A; add 1.5 parts of 554 accelerator to 45 parts of 5506 curing agent under stirring, and then stir for 15 minutes to obtain group B Parts; Mix the raw materials of the above two components A and B evenly to obtain a flexible epoxy structural adhesive.

[0040] The initial viscosity of the flexible epoxy structural adhesive is 5100cps, it can be cured within 4 days at room temperature, and the pot life is more than 120 minutes. The flexibility of t...

Embodiment 3

[0042]A preparation method of flexible epoxy structural adhesive, which is prepared by mixing component A and component B at a weight ratio of 100:22.

[0043] Add 30 parts of D2000 polyetheramine and 20 parts of D400 polyetheramine to 100 parts of 6350 epoxy resin, continue to stir for 15 minutes, and then obtain modified polyetheramine after standing at room temperature for 48 hours; mix 20 parts of 618 epoxy resin and Mix 70 parts of modified polyetheramine evenly under stirring to obtain component A; add 2 parts of 554 accelerator to 50 parts of 5506 curing agent under stirring, and then stir for 15 minutes to obtain component B; combine the above A and B The raw materials of the two components are uniformly mixed to obtain a flexible epoxy structural adhesive.

[0044] The initial viscosity of the flexible epoxy structural adhesive is 6300cps, it can be cured within 5 days at room temperature, and the pot life is more than 120 minutes. The flexibility of the sample is go...

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Abstract

The invention provides a formula of a flexible epoxy structural adhesive and a preparation method. The method is characterized in that dual-epoxy-group epoxy resin and polyether amine react to obtain modified polyether amine firstly. The formula of the flexible epoxy structural adhesive comprises a component A and a component B, wherein the component A comprises, in parts by weight, 10-40 parts of the epoxy resin, 40-80 parts of the modified polyether amine and 0-40 parts of a reactive diluent; the component B comprises, in parts by weight, 0-20 parts of the polyether amine, 30-60 parts of a curing agent and 1-3 parts of an accelerator; the flexible epoxy structural adhesive is prepared after the component A and the component B are mixed in the weight ratio of 100:(20-60). The method has the advantages that the flexible epoxy structural adhesive is convenient to construct, long in working life, slow in heat release and capable of being cured at the room temperature; an obtained epoxy material is good in flexibility, high in adhesive strength and widely applicable to fields of electrons, machinery, ships, automobiles, buildings and the like.

Description

technical field [0001] The invention relates to a polymer functional material and a preparation method thereof, in particular to a flexible epoxy structural adhesive prepared by using ether amine and a preparation method thereof. Background technique [0002] Epoxy materials have excellent properties, including excellent mechanical properties, good electrical insulation properties, good corrosion resistance, low shrinkage, good chemical and thermal stability, high strength and high modulus, good bonding properties and excellent processability Etc., so epoxy resin is one of the most important matrix resins in composite materials, and has been widely used in many fields. However, due to the high cross-linking density of ordinary epoxy resin after curing, the epoxy material has great brittleness, poor impact resistance, and is easy to crack; When the change is large, it is easy to appear the phenomenon of interface disengagement, bulging, and edge warping, which limits its ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J171/00C09J11/06
Inventor 陈海波
Owner SHISHI GUOGAO ELECTRONICS TECH
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