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Adhesive for drawing slot wedge, and preparation method of slot wedge using adhesive

An adhesive and slot wedge technology, applied in polymer adhesive additives, using/manufacturing slot locking devices, adhesive additives, etc., can solve problems such as poor mechanical strength, achieve high heat resistance, and excellent mechanical properties. , the effect of good insulation performance

Active Publication Date: 2020-09-01
浙江博菲电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional pull-out slot wedges are generally produced with epoxy anhydride or unsaturated polyester as the impregnated resin and alkali-free glass fiber as the reinforcing material. Its tensile, bending, compression and other mechanical strength is poor, especially under high temperature conditions
[0004] With the continuous upgrading of heat resistance grades of motors, electrical appliances, transformers and other equipment, especially in high-voltage motors and wind power generators, higher requirements are placed on the mechanical strength of slot wedge products at high temperatures. The wedge is far from meeting the needs of electrical equipment, so we developed this slot wedge with high mechanical strength and good heat resistance

Method used

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  • Adhesive for drawing slot wedge, and preparation method of slot wedge using adhesive
  • Adhesive for drawing slot wedge, and preparation method of slot wedge using adhesive
  • Adhesive for drawing slot wedge, and preparation method of slot wedge using adhesive

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Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0032] In embodiment 1~5, the preparation method of the epoxy resin of bismaleimide modification is:

[0033] 1) Put 90 parts of E51 epoxy resin, 10 parts of 638 epoxy resin and 5 parts of maleic anhydride into the reaction kettle in sequence, and keep warm at 130±5°C until the acid value is less than 3mgKOH / g;

[0034] 2) After the acid value is qualified, add 15 parts of bismaleimide, keep warm at 145±5°C until the liquid surface is clear and transparent, then cool down, add 10 parts of vinyl toluene, and obtain bismaleimide modified epoxy resin.

Embodiment 1

[0038] The formula of the adhesive of the present embodiment is:

[0039] Bismaleimide modified epoxy resin 100g, initiator dicumyl peroxide (DCP) 1.5g, reactive diluent are styrene 13g, curing agent is 2-ethyl-4 methylimidazole 4.0g .

[0040] After the above-mentioned components are mixed evenly according to the formula, the high heat-resistant and high-strength epoxy adhesive for drawing and pulling is prepared. When the adhesive is used, the mold is heated to 160°C in the curing step, and the resin stays in the mold for 80 seconds. After the curing step at high temperature, an insulating material is formed, and the insulating material is obtained through a subsequent process to obtain a slot wedge.

Embodiment 2

[0042] The formula of the adhesive of the present embodiment is:

[0043] Bismaleimide modified epoxy resin 100g, isophthalic unsaturated polyester resin 6g, tert-butyl peroxybenzoate 1.0g, reactive diluent is styrene 10g, curing agent 2-ethyl-4 Methylimidazole 3.0g.

[0044] After the above-mentioned components are mixed evenly according to the formula, the adhesive for high temperature resistant slot wedge is prepared. When the adhesive is used, the mold is heated to 150°C in the curing step, and the resin stays in the mold for 80 seconds. After the curing step at high temperature, an insulating material is formed, and the insulating material is obtained through a subsequent process to obtain a slot wedge.

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Abstract

The invention discloses an adhesive for drawing a slot wedge, and a preparation method of the slot wedge using the adhesive. The adhesive comprises, by weight, 100 parts of bismaleimide modified epoxyresin, 0-10 parts of unsaturated polyester resin, 8-15 parts of an active diluent, 0.2-1.5 parts of an initiator and 2-5 parts of a curing agent. Compared with like adhesives in the prior art, the adhesive for drawing the slot wedge, provided by the invention, has the advantages of high heat-resistant grade, good insulating property, good mechanical strength, particularly good thermal-state mechanical strength, certain flame-retardant effect and excellent comprehensive performance.

Description

technical field [0001] The present application relates to the technical field of insulating materials, in particular to an adhesive used for pulling out slot wedges and a method for preparing slot wedges using the adhesive. Background technique [0002] The slot wedge is an indispensable part in the engine. For example, the patent document with the authorized announcement number CN201130879 discloses a slot wedge structure made of magnetic material, which consists of two parts: the slot wedge and the slot bottom wedge. The slot wedge is placed in the slot and cover the entire length of the slot, the top of the slot wedge is placed in the slot, the width of the top of the slot wedge is smaller than the width of the slot, so that a gap is formed between the top of the slot wedge and the slot, and the arc surface of the top of the slot wedge matches the arc surface of the tooth top of the iron core , the lower end of the slot wedge is stuck in the slot and connected to the slot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/10C09J11/08H02K15/00H02K3/487
CPCC09J163/10C09J11/08H02K15/0018H02K3/487C08L2201/08C08L67/06
Inventor 许坤陈瑞王志坚张凤清缪丽峰胡萧勇
Owner 浙江博菲电气股份有限公司
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