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Double-component epoxy resin embedding adhesive and its preparation method and can sealing technique

A technology of epoxy resin and potting glue, applied in epoxy resin glue, chemical instruments and methods, adhesives, etc., can solve the problems of high surface tension, low surface tension, bubbles cannot be eliminated, etc. Gel time, weaken the effect of difficult defoaming

Active Publication Date: 2008-08-06
SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After repeated experiments, the applicant of the present invention found that if cashew nut shell oil is used alone as a curing agent for potting glue, there will be a large number of bubbles on the surface after curing, which cannot be eliminated. There are mainly two reasons for this: one is the modification of cashew nut shell oil The viscosity of the amine curing agent is relatively high, often reaching several thousand to tens of thousands of cps, which is not conducive to the elimination of surface air bubbles; secondly, because the existing cashew nut shell oil modified amine is used as an epoxy resin curing agent, there is surface tension after glue filling Large defects that are not easy to defoam, and some post-processing work is required to make the mixed epoxy resin curing system have a lower surface tension

Method used

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  • Double-component epoxy resin embedding adhesive and its preparation method and can sealing technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of epoxy resin A component:

[0035] Add 200g bisphenol A epoxy resin in 500ml planetary mixer, add 40g reactive diluent, 1.6g defoamer and 2g black paste successively, then add 210g precipitated barium sulfate, 90g calcium carbonate, 4g fumed white carbon black, in The revolution speed is 5rpm, the rotation speed is 100rpm, without vacuuming, stir for 5 minutes, stop stirring, turn on the vacuum equipment, when the vacuum degree reaches 0.09Mpa, start stirring, the revolution speed is 30rpm, the rotation speed is 300rpm, stir for 30 Minutes, stop stirring, release the vacuum, and discharge;

[0036] (2) Preparation of curing agent B component:

[0037] Weigh 48g of fatty amine, 20g of cashew shell oil modified amine and 12g of polyetheramine into a 300ml high-speed stirring tank, and stir for 5 minutes at a rotation speed of 300rpm.

[0038] Accurately weigh 100g of the above-mentioned component A and 20g of the above-mentioned component B, and stir e...

Embodiment 2

[0041] (1) Preparation of epoxy resin A component: with embodiment 1

[0042] (2) Preparation of curing agent B component:

[0043] Weigh 48g fatty amine, 16g cashew shell oil modified amine and 16g polyether amine respectively in a 300ml high-speed stirring tank, and stir for 5 minutes at a rotating speed of 300rpm.

[0044] Accurately weigh 100g of the above-mentioned component A and 20g of the above-mentioned component B, and stir evenly to make a potting compound.

[0045] The mensuration of operation time and curing time: with embodiment 1

Embodiment 3

[0047] (1) Preparation of epoxy resin A component: with embodiment 1

[0048] (2) Preparation of curing agent B component:

[0049] Weigh 30 g of fatty amine and 30 g of cashew nut shell oil modified amine respectively in a 300 ml high-speed stirring tank, and stir for 5 minutes at a rotation speed of 300 rpm.

[0050] Accurately weigh 100g of the above-mentioned component A and 20g of the above-mentioned component B, and stir evenly to make a potting compound.

[0051] The mensuration of operation time and curing time: with embodiment 1

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Abstract

Bi-component epoxy resin pouring sealant and the preparation and the potting technology are disclosed, which comprises an epoxy resin A component and a cursing agent B component, wherein the curing agent B component at least comprises the mixing curing agent of cashew shell oil modified amine curing agent and fatty amine curing agent. The potting technology comprises mixing and stirring evenly the epoxy resin A component and the curing agent B agent to conduct the potting, and spraying a layer of absolute alcohol on the surface of the pouring sealant after 10-15 minutes. The advantages are that gel time is prolonged through adopting the mixing curing agent of cashew shell oil modified amine curing agent and fatty amine curing agent, the requirement of operation time is fulfilled, and the operation time can reach 20-30 minutes, thereby being beneficial for the encapsulation of housing with large capacity, and the pouring sealant of the invention has the effect of fast curing, wherein the curing time is 1-3 hours, and defoaming is accelerated through spraying a layer of absolute alcohol on the surface of colloid after pouring, thereby making the solid gel surface bright and flat after curing.

Description

technical field [0001] The invention relates to a two-component epoxy resin potting glue and its preparation method and potting process, especially a component using cashew nut shell oil modified amine as a curing agent, and fatty amine and other curing agents A two-component epoxy resin potting compound that is combined into a mixed curing agent. Background technique [0002] For most two-component epoxy potting compounds, the long working time and corresponding long curing time, and vice versa. In the case where the curing time is required to be short, due to the short operation time, it cannot satisfy the shell potting with a large amount of glue at one time, and often the glue filling work has not been completed, and the glue that was poured at the beginning has gelled and cannot flow, which makes the later stage The poured glue cannot fully flow into the gap of the shell, and it is easy to form a cavity in the middle after curing. [0003] If the gel time is prolonged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10C09J163/00C08K5/17
Inventor 李斌王卫华戴宏程张德成
Owner SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD
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