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Mica tape for motor and preparation method of mica tape

A technology of mica tape and mica paper, applied in chemical instruments and methods, epoxy resin glue, adhesive types, etc., can solve the problems of difficult motor insulation and flame retardancy, large motor heat generation, poor aging resistance, etc. Improve crosslinking density, reduce dielectric loss, good compatibility

Active Publication Date: 2012-07-18
SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, most of the adhesives for mica tapes are based on ordinary epoxy resin modification or ordinary linear polyester resins, which have low bond strength, low crosslinking density, and poor compatibility. Mica is low in weight, easy to drop powder, low in breakdown voltage, and high in dielectric loss, resulting in high heat generation, poor aging resistance, and poor flame retardant performance of the motor. It is difficult to apply to the insulation and flame retardant of motors.

Method used

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  • Mica tape for motor and preparation method of mica tape
  • Mica tape for motor and preparation method of mica tape
  • Mica tape for motor and preparation method of mica tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the mica tape of the present embodiment obtains through the following steps:

[0026] 1. Preparation of adhesive

[0027] (1), synthetic carboxyl-terminated hyperbranched polyester resin: put 0.1mol trimesic acid, 0.1mol ethylene glycol and 0.2g p-toluenesulfonic acid into a three-necked flask, connect the water separator, thermometer and stirring device, put The temperature of the computer microwave reactor was controlled at 180° C., and the power was set to 1000 watts to react for 6 hours to obtain a carboxyl-terminated hyperbranched polyester resin with a molecular weight of 19500 (number average).

[0028] (2), preparation adhesive: get step (1) gained hyperbranched polyester resin 10 parts, bisphenol A type epoxy resin (commercial code is E51) 40 parts, acetone 25 parts, butanol 25 parts, aluminum acetylacetonate 0.1 40 parts and 40 parts of phosphorus-containing epoxy resin (DGP-1) are mixed evenly to obtain the adhesive.

[0029] 2. Making mica tap...

Embodiment 2

[0032] According to the mica tape of the present embodiment obtains through the following steps:

[0033] 1. Preparation of adhesive

[0034] (1), synthesis of carboxyl-terminated hyperbranched polyester resin: put 0.1mol trimellitic acid, 0.1 butanediol and 0.3g p-toluenesulfonic acid into a three-necked flask, connect the water separator, thermometer and stirring device, and put the computer The temperature of the microwave reactor was controlled at 200° C., and the power was set to 1100 watts to react for 6 hours to obtain a carboxyl-terminated hyperbranched polyester resin with a molecular weight of 18,000 (number average).

[0035] (2), preparation adhesive: get 15 parts of carboxyl-terminated hyperbranched polyester resins obtained in step (1), 30 parts of bisphenol A type epoxy resins (commercial code name is E54), 10 parts of acetone, 20 parts of butanol, xylene 50 parts, 0.3 parts of chromium acetylacetonate, and 60 parts of phosphorus-containing epoxy resin (DGP-2) ...

Embodiment 3

[0039] According to the mica tape of the present embodiment obtains through the following steps:

[0040] 1. Preparation of adhesive

[0041] (1), synthetic carboxyl-terminated hyperbranched polyester resin: 0.11mol trimellitic anhydride, 0.05mol propylene glycol, 0.05mol ethylene glycol and 0.5g p-toluenesulfonic acid are put into a three-necked flask, connected to a water separator, a thermometer and a stirring device, The temperature of the computer microwave reactor was controlled at 150° C., and the power was set to 1100 watts to react for 5 hours to obtain a carboxyl-terminated hyperbranched polyester resin with a molecular weight of 10,000 (number average).

[0042] (2), preparation adhesive: get 15 parts of carboxyl-terminated hyperbranched polyester resins obtained in step (1), 60 parts of bisphenol A type epoxy resins (commercial code name is CYD128), 30 parts of acetone, 30 parts of butanol, 40 parts of toluene parts, 0.5 parts of chromium isooctanoate, and 90 parts ...

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Abstract

The invention relates to a mica tape for a motor and a preparation method of the mica tape. The mica tape comprises a mica paper layer, a polyester film layer, a first adhesive layer and a second adhesive layer, wherein adhesive adopted by the first and the second adhesive layers is formed by mixing 10 to 15 parts of carboxy-terminated hyperbranched polyester resin, 30 to 60 parts of bisphenol A epoxy resin of which the epoxy equivalent weight is less than or equal to 200g / mol, 50 to 120 parts of organic solvents, and 0.1 to 1 part of accelerators and 40 to 90 parts of phosphorus-containing epoxy resin; the number-average molecular weight of the carboxy-terminated hyperbranched polyester resin is greater than or equal to 10000 and is less than 20000; and the carboxy-terminated hyperbranched polyester resin is obtained through using one or more first monomers selected from trimellitic acid, trimesic acid and trimellitic anhydride to react with one or more second monomers selected from ethylene glycol, propylene glycol and butanediol. Compared with an existing mica tape for the motor, the mica tape provided by the invention has the advantages that the cost is lower, the production is simpler and the performance is more excellent.

Description

technical field [0001] The invention relates to a mica tape for a motor and a preparation method thereof. Background technique [0002] For electrical equipment, mica tape for coils is an indispensable material, and its quality plays a key role in the technical and economic indicators and operating life of electrical equipment. Improving the heat resistance level of the mica tape can increase the voltage, increase the capacitance, reduce the volume, reduce the weight, and can run reliably for a long time under harsh conditions such as high temperature and high load, and save the cost of electrical equipment. The key factor to improve its heat resistance level is to increase the mica quantitative of the mica tape, reduce the glue content, and develop an adhesive with higher bonding strength is an important measure to reduce the glue content. At the same time, the adhesive is required to have good compatibility, excellent insulation performance, and heat dissipation Good sex ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B19/02B32B7/12B32B37/12B32B38/16C09J167/00C09J163/02C09J11/06
Inventor 井丰喜张道洪施文磊顾建峰徐晓风
Owner SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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