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Dipping insulating paint and preparation method therefor

An impregnated insulation and unsaturated technology, which is applied in the direction of coating, epoxy resin coating, polyester coating, etc., can solve the problems of loss of insulating paint, less paint hanging on motors, and waste of insulating paint, so as to achieve energy-saving production efficiency and saving Material, quality improvement effect

Inactive Publication Date: 2014-03-05
GUANGZHOU BETTER NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of insulating varnishes formulated with such active monomers (such as Low Emission under the Voltatex brand of Dupont Company of the United States and Damisol3630 of Isona Company), the viscosity of the varnish drops rapidly at high temperatures due to its low volatility. , the insulating varnish is seriously lost during the baking process, which leads to a small amount of varnish on the motor after impregnating the insulating varnish, and a serious waste of insulating varnish

Method used

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  • Dipping insulating paint and preparation method therefor
  • Dipping insulating paint and preparation method therefor
  • Dipping insulating paint and preparation method therefor

Examples

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preparation example Construction

[0032] Such as figure 1 , the preparation method of impregnated insulating varnish of the present invention mainly comprises the following steps:

[0033] Step 1: Add all unsaturated polyester resin, acrylate prepolymer and 15-20 parts of non-volatile reactive diluent into the stirring tank, heat to 60-80°C, stir until the resin is completely dissolved and then cool down;

[0034] Step 2: Add a rheological additive to the resin solution in step 1, stir and grind;

[0035] Step 3: Adjust the paint to the specified viscosity range with active diluent;

[0036] Step 4: Add 1% to 2% of curing agent and 0.2% to 1% of additives such as polymerization inhibitor, leveling agent and defoamer;

[0037] Step 5: Filter to obtain impregnated insulating varnish.

[0038] The present invention has the following beneficial effects:

[0039] 1. Use non-volatile active diluent with high flash point and high boiling point to prepare solvent-free insulating paint. The product is environmental...

Embodiment 1

[0045] In parts by weight, the impregnated insulating varnish in this embodiment is made from the following raw materials:

[0046]

[0047]

[0048]The preparation method of the above impregnated insulating varnish is as follows: add 60 parts of unsaturated polyesterimide resin, 10 parts of polyurethane acrylate prepolymer and 25.5 parts of diallyl phthalate into the stirring tank, and heat it to 60-80 ℃, stir until the resin is completely dissolved and then cool down, then add 2 parts of polyamide rheology additive, stir and grind, adjust the paint to the specified viscosity range with diallyl phthalate, then add 2 parts of diphenylene Diperoxide, 0.05 part of o-methylhydroquinone, 0.15 part of TEGO Wet505, 0.1 part of BYK307 and 0.2 part of TEGO Rad2500 were finally filtered to obtain impregnated insulating varnish.

Embodiment 2

[0050] In parts by weight, the impregnated insulating varnish in this embodiment is made from the following raw materials:

[0051]

[0052] The preparation method of the above impregnated insulating varnish is: add 46 parts of unsaturated polyester resin, 14 parts of epoxy acrylate prepolymer and 22 parts of neopentyl glycol dimethacrylate into the stirring tank, and heat to 60-80 ℃, stir until the resin is completely dissolved, then cool down, then add 1.5 parts of fumed silica, stir and grind, adjust the paint to the specified viscosity range with neopentyl glycol dimethacrylate, and then add 1 part of tert-butyl perbenzoate Esters, 0.05 parts of o-methylhydroquinone, 0.25 parts of TEGO Wet505, 0.1 parts of Levaslip435 and 0.1 parts of TEGO Rad2500, and finally filtered to obtain impregnated insulating varnish.

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Abstract

The invention provides a dipping insulating paint, and relates to an insulating paint for a motor. The dipping insulating paint is prepared from the following raw materials, by weight, 30-60 parts of unsaturated polyester resins, 10-30 parts of acrylic ester prepolymers, 1-2 parts of curing agents, 1-5 parts of rheological additives, 20-40 parts of diluters without volatilization activity, and 0.2-1 part of auxiliary agents. The invention also provides a preparation method for the dipping insulating paint. The dipping insulating paint is environmentally friendly, nontoxic and low baking loss amount, and therefore raises the painting amount of a motor.

Description

technical field [0001] The invention relates to an insulating varnish for motors and a preparation method thereof, in particular to an impregnated insulating varnish and a preparation method thereof. Background technique [0002] Vacuum pressure impregnation (VPI for short) technology has been widely used in the insulation technology of electric motors and electrical appliances at home and abroad. VPI technology includes many elements, but the insulation performance mainly depends on the VPI impregnated resin. Most of the VPI resins used at home and abroad use styrene as a diluent; the disadvantage of styrene is high saturated vapor pressure, strong smell, and irritating Styrene is highly volatile and smelly because it has a low boiling point of only 145.2 ℃, its saturated vapor pressure at 25 ℃ is relatively high, which is 853Pa. [0003] With the continuous strengthening of the society's environmental protection requirements for insulating impregnating varnishes, non-tox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D179/08C09D163/10C09D175/14C09D183/04C09D5/25C09D7/12
Inventor 邹家桂张杰元王君刘彦坤
Owner GUANGZHOU BETTER NEW MATERIALS
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