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A non-post-curing epoxy resin casting system

An epoxy resin and casting system technology, which is applied in the field of non-post-curing epoxy resin casting systems, can solve problems such as heavy labor intensity, high energy consumption, and impact on product delivery time, and achieve high production efficiency, simple production process, and guaranteed The effect of quality stability

Inactive Publication Date: 2016-09-07
广州仑利奇合成树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this traditional curing process will also bring high energy consumption and heavy labor intensity, and also affect the delivery time of the product

Method used

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  • A non-post-curing epoxy resin casting system
  • A non-post-curing epoxy resin casting system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0063] At room temperature, add 10% LLQ8040, 0.5% K560 and 0.5% DY062 accelerator into 89% DER331, stir at room temperature for about 80 minutes, and set aside. Dissolve 0.8% DCMU-99 N-(3,4 dichlorophenyl)-N,N-dimethylurea in LLQ1225 at 80 degrees, cool to room temperature for use. Then mix the above formula toughened epoxy resin, formula toughened anhydride curing agent and 400 mesh active quartz powder according to 100:100:380 at 40°C for 1 hour, vacuumize for 1.5 hours, mold temperature 150°C, vacuum degree 4.5mbar , Hold pressure at 160°C for 15 minutes, demoulding to obtain an insulator without post-curing. The glass transition temperature of the DSC curve test is 85°C, and there is no obvious exothermic curve above 100°C. -40°C-80°C cold and heat cycle 3 times without any cracking.

Embodiment example 2

[0065] Add 5% ATBN 1300×21, 0.2% K560 and 0.8% DMP30 accelerator into 94% DER331, stir at room temperature for about 80 minutes, and set aside. React 10% polyethylene glycol 200 and 89.5% methyltetrahydrophthalic anhydride at 150°C for 1.5 hours, cool to room temperature, add 0.5% 2-ethyl-4 methylimidazole, stir for 30 minutes, cool to room temperature for use . Then mix the above formula toughened epoxy resin, formula toughened anhydride curing agent and 400 mesh active quartz powder according to 100:100:350 at 40°C for 1 hour, vacuumize for 1.5 hours, mold temperature 150°C, vacuum degree 4.5mbar , Hold pressure at 150°C for 30 minutes, demoulding to obtain a transformer without post-curing. The glass transition temperature of the DSC curve test is 82°C, and there is no obvious exothermic curve above 100°C. -50°C-120°C cold and heat cycle 5 times without any cracking.

[0066]

[0067] The above table is the cold and hot cycle report of the non-post-cured epoxy casting...

Embodiment example 3

[0069] At 80°C, add 0.2% aluminum acetylacetonate accelerator to 89.3% DER331 to dissolve, then cool to room temperature, add 15% PPGDGE, 0.5% K560 to the above mixture, stir for 1 hour, and set aside. Dissolve 0.5% organic urea accelerator Dyhard UR 500 in LLQ 1227 at 80 degrees, cool to room temperature for use. Then mix the above formula toughened epoxy resin, formula toughened anhydride curing agent and 400 mesh active quartz powder according to 100:100:400 at 40°C for 1 hour, vacuumize for 1.5 hours, mold temperature 150°C, vacuum degree 4.5mbar , Hold pressure at 150°C for 20 minutes, demoulding to get a casing without post-curing. The glass transition temperature of the DSC curve test is about 96°C, and there is no obvious exothermic curve above 100°C. -40°C-80°C cold and heat cycle 3 times without any cracking.

[0070] refer to figure 1 , the DSC table of the non-post-cured epoxy casting product produced in the implementation case three, as can be seen from the tab...

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Abstract

The invention provides a non-post-curing epoxy resin casting system, which includes a formula toughened epoxy resin and a formula toughened anhydride curing agent, and the formula toughened epoxy resin is milky white to light yellow solvent-free pre-accelerated liquid epoxy resin The curing agent is an improved pre-accelerated acid anhydride liquid curing agent, each component is mixed at a lower temperature according to the expected quantity, after mixing evenly, it is poured into the mold after degassing under vacuum conditions for 0.5 to 2 hours curing reaction. The main feature of the non-post-curing epoxy resin casting system is that it does not need to be cured after demoulding, which reduces the overall energy consumption of the electrical equipment manufacturing plant, and can shorten the production cycle time by as much as 20%, shorten the product delivery time, and reduce product costs. and reduce the labor intensity of workers.

Description

technical field [0001] The invention relates to an epoxy resin casting system, in particular to a non-post-curing epoxy resin casting system which can achieve the same electromechanical properties as the post-curing epoxy system without post-curing. Background technique [0002] Epoxy resin has excellent physical and mechanical properties, electrical insulation properties, chemical resistance and bonding properties, and can be used as coatings, casting materials, molding materials, adhesives, and laminated materials in the form of direct or indirect use from daily life. All aspects of the national economy from supplies to high-tech fields. Especially in the field of electrical insulation, epoxy resin occupies a very important position, but the current mainstream production process adopts two kinds of traditional vacuum casting and automatic pressure gel (APG). The mold is then again subjected to a post-curing process at a high temperature of about 130 degrees Celsius for up...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C39/02C08L63/00C08K3/36C08G59/42
Inventor 莫海林
Owner 广州仑利奇合成树脂有限公司
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