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High-strength epoxy resin iron-core glue used for amorphous transformer

A technology of epoxy resin and transformer, which is applied in the direction of epoxy resin glue, non-polymer adhesive additives, adhesives, etc., and can solve problems such as easy cracking and weak impact resistance

Inactive Publication Date: 2013-10-02
JIAXING JIAGANG SYNTHETIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cured product of general epoxy resin adhesive is relatively brittle, has weak impact resistance and is easy to crack.

Method used

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  • High-strength epoxy resin iron-core glue used for amorphous transformer

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preparation example Construction

[0041] The preparation method of the high-strength epoxy resin core adhesive for amorphous transformer comprises the following process steps:

[0042] (1) Preparation of liquid isoprene toughening agent: After pre-baking liquid isoprene rubber and reactive epoxy diluent in a drying room at 80°C for more than 3 hours, the ratio by weight is 1:1 Pour it into a high-speed disperser together, and disperse and stir at a speed of 300 rpm for more than 30 minutes until the mixed liquid becomes clear and integrated;

[0043] (2) Preparation of component A: put bisphenol A epoxy resin, liquid isoprene toughening agent, gray glue, defoamer, and coupling agent liquid materials prefabricated in step (1) in a planetary mixer at 90 After heating and stirring at ℃ for 30 minutes, add the thixotropic material, first stir at low speed for 20 minutes, then raise the temperature to 80℃, vacuum and stir at high speed for 20 minutes, move to the hydraulic discharge machine, and press the material ...

Embodiment 1

[0054] Example 1 (A component 1): Add 280Kg bisphenol A type epoxy resin (YD-128 manufactured by Kunshan Guodu Chemical) into a stainless steel reaction kettle with electric heating and vacuum device planetary mixer (Foshan Jinyinhe Machinery, XJB600) , epoxy equivalent 190g / eq), heated to 90°C, then added 2Kg gray glue, 40Kg liquid isoprene toughening agent, 0.6Kg defoamer (Deqian Chemical Defom5300), silane coupling agent KH550 and KH560 0.6Kg (Nanjing Shuguang Chemical Industry Co., Ltd.), stir quickly at 300 rpm for 30 minutes, add 80Kg of thixotropic powder nano-scale rubber and plastic calcium carbonate (Huzhou Linghua Group, D50≤0.5μm), first mix at 200 rpm Stir for 20 minutes, then raise the temperature to 80°C, evacuate to above -0.08MPa, stir at a speed of 300 rpm for 20 minutes, discharge through a hydraulic discharge machine, and pass through a three-roll machine (Changzhou Dongfang Jingda Machinery Factory, S260 ) Grind 1 time into a uniform rubber compound.

Embodiment 2

[0055] Example 2 (A component 2): Add 256Kg bisphenol A type epoxy resin (YD-128 manufactured by Kunshan Guodu Chemical) into a stainless steel reactor of a planetary mixer (Foshan Jinyinhe Machinery, XJB600) with electric heating and vacuum device , epoxy equivalent 190g / eq), heated to 90°C, then added gray glue 2Kg, liquid isoprene toughening agent 64Kg, defoamer 0.6Kg (Deqian Chemical Defom5300), silane coupling agent KH550 and KH560 0.6Kg (Nanjing Shuguang Chemical Industry Co., Ltd.), stir quickly at 300 rpm for 30 minutes, add 80Kg of thixotropic powder nano-scale rubber and plastic calcium carbonate (Huzhou Linghua Group, D50≤0.5μm), first mix at 200 rpm Stir for 20 minutes, then raise the temperature to 80°C, evacuate to above -0.08MPa, stir at a speed of 300 rpm for 20 minutes, discharge through a hydraulic discharge machine, and pass through a three-roll machine (Changzhou Dongfang Jingda Machinery Factory, S260 ) Grind 1 time into a uniform rubber compound.

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Abstract

The invention relates to a high-strength epoxy resin iron-core glue used for an amorphous transformer. The iron-core glue comprises an A component and a B component, wherein the A component comprises a bisphenol A epoxy resin, a flexibilizer liquid isoprene rubber pre-dispersed in an epoxy diluent, a thixotropy powder material, a gray glue, an antifoaming agent and a silane coupling agent; and the B component comprises a curing agent polyamide 651, a curing agent polyetheramine D-400, an accelerant DMP-30, benzyl alcohol, a thixotropy powder material and silicon powder. The iron-core glue is prepared by (1) a step of pre-dispersion of the liquid isoprene rubber; (2) a step of preparation of the A component; and (3) a step of preparation of the B component. By addition of the flexibilizer liquid isoprene rubber, the iron-core glue provided by the invention has improved bonding strength, shock resistance, high toughness, and good heat resistance, and the iron-core glue has thixotropy performance by addition of the thixotropy powder material. The flexibilizer liquid isoprene rubber is pre-dispersed in the epoxy diluent during preparation, thus eliminating adverse phenomena of layering and precipitating.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and relates to a high-strength epoxy resin core adhesive for amorphous transformers and a preparation method thereof. Background technique [0002] Epoxy resin adhesive has excellent bonding performance, water resistance, high mechanical strength and heat resistance. However, the cured product of general epoxy resin adhesive is relatively brittle, has weak impact resistance and is easy to crack. Usually polyurethane, nitrile rubber, acrylic, etc. are used to improve the performance of epoxy resin adhesives. Contents of the invention [0003] The invention aims to provide a composition of high-strength epoxy resin core glue for amorphous transformers, which has high bonding strength, impact resistance, high toughness, good heat resistance and thixotropic performance. Another object of the present invention is to provide a preparation method of this epoxy resin core glue. [0004] This high-...

Claims

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Application Information

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IPC IPC(8): C09J163/02C09J11/08C09J11/04
Inventor 邹伟丰
Owner JIAXING JIAGANG SYNTHETIC MATERIALS
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