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Composition for fixing wound items

A composition and object technology, applied in the direction of insulators, plastic/resin/wax insulators, organic insulators, etc., can solve the problems of uneven impregnation materials, increased viscosity, and unfavorable impregnation efficacy, and achieve excellent impregnation characteristics and low viscosity , The effect of excellent heat transfer characteristics

Active Publication Date: 2010-12-01
AXALTA COATING SYST GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, impregnated materials containing such fillers are usually not very homogeneous
This can create problems in terms of composition storage conditions and also leads to inability to penetrate into electrical coil cavities and impregnation during operation of electrical devices.
DE-A 2638047 and WO 2007 / 045633 disclose the use of filler particles of reduced size, but homogeneity remains an issue
Furthermore, the use of aqueous silica particles makes it difficult to incorporate water into the impregnation system, and / or inorganic filler particles can lead to a significant increase in viscosity, which is detrimental to good impregnation efficacy

Method used

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  • Composition for fixing wound items
  • Composition for fixing wound items
  • Composition for fixing wound items

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Component A)

[0071] Component A is an unsaturated polyester based on maleic anhydride, castor oil, tetrahydrophthalic anhydride, ethanolamine and neopentyl glycol (acid number 12 mg KOH / g, double bond equivalent weight 500 g / mol).

[0072] Preparation of impregnating resin composition

[0073] 1.1 Prior Art Compositions

[0074] 65 parts of component A) were heated to 100° C. and dissolved in 35 parts of a fully acrylated reaction product of trimethylolpropane and ethylene oxide (1:4 molar ratio, component C). After cooling to <40°C, add 1.4 parts of C-C free radical initiator (benzopinacol ether, component D) and mix well.

[0075] 1.2 Compositions of the present invention

[0076] 65 parts of component A) were heated to 100°C and dissolved in 70 parts of the peracrylated reaction product of trimethylolpropane and ethylene oxide in 50% methacryl functionalized silica (component B) (Molar ratio is 1:4, component C) in colloidal solution. After cooling to ...

Embodiment 2

[0078] Curing Method and Results

[0079] Copper conductors were coated with the impregnating resin composition at room temperature (20° C. to 22° C.) to obtain a specified film thickness of 40 μm. Curing was carried out at 160°C for one hour. The coated copper conductors are crimped together and connected to the frequency converter. The coated copper conductors were then stressed by corona discharge (2.5 kV total oscillation amplitude, 20 kHz). The time until the insulation layer is broken (short circuit) is determined.

[0080] Table 1 :Test Results

[0081] Example

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Abstract

A composition for fixing wound items comprising A) 0 to 90 wt% of at least one alpha, beta-unsaturated polyester and / or polyester imide resin based on at least one unsaturated mono-, di- or tricarboxylic acids and / or mono-, di- or tricarboxylic acid group containing molecules, at least one polyol and / or, in case of an unsaturated polyester imide, at least one imide having 5-membered cyclic imide moieties, B) 0.1 to 80 wt% of at least one inorganic and / or organic-inorganic hybrid component having functionalities to react with component A) and C), C) 2 to 80 wt% of at least one monomeric and / oroligomeric unsaturated component to react with component A) and B), and D) 0 to 15 wt% of customary additives, the wt% being based on the total weight of the composition. The composition provides excellent thermal transfer properties and a high level of electrical insulation properties with excellent adhesion and thermal stability.

Description

field of invention [0001] The present invention relates to a composition for fixing wound objects, especially electrical coils in electrical equipment, which provides excellent immersion characteristics into wound objects and excellent electrical insulation and thermal conductivity. Background of the invention [0002] In objects suitable for impregnation (e.g. by dipping, dipping, trickling or casting techniques) for winding objects (such as electrical coils and coils, especially magnetic wire coils in electrical devices) and for casting electrical devices (such as stators, rotors) and transformers) are well known in the art for the use of unsaturated polymers in mechanically toughened and strengthened compositions. A wide variety of resins are available for those applications, generally providing electrical insulation, stability of electrical coils against vibration, improved aging characteristics, and protection against chemical and mechanical influences. As electrical d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02H01B3/30
CPCC08K13/02C08F283/01C08L67/06H01B3/303
Inventor F-R·贝姆M·赫尔姆M·居尔特金B·特拉普曼
Owner AXALTA COATING SYST GMBH
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