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Polyesterimide enamelled wire paint capable of straightly soldering and method for preparing same

A technology of enameled wire varnish and polyesterimide, which is applied in coatings, plastic/resin/wax insulators, organic insulators, etc., to achieve the effects of improving solderability, improving coating performance, and improving curing performance

Inactive Publication Date: 2009-01-07
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents have no report on the direct solderability of polyesterimide wire enamel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] (1) Preparation of polyesterimide resin

[0038] Polyesterimide resin is produced from monobasic acid, aromatic dibasic acid, trimellitic anhydride, 4,4'-diaminodiphenylmethane, triol, triethanolamine, diol, and monoethanolamine through melt co-condensation to produce polyesterimide resin. The mass ratio of each raw material in the component is: monobasic acid: aromatic dibasic acid: trimellitic anhydride: 4,4'-diaminodiphenylmethane: tribasic alcohol: triethanolamine: dibasic alcohol: monoethanolamine equals 1: (1 ~1.5):(0.2~0.9):(0.2~0.9):(0.8~2.5):(0.3~1.0):(0.3~1.5):(0.1~0.8). The monobasic acid is one or more of benzoic acid, abietic acid, butyric acid, stearic acid, palmitic acid, myristic acid, and lauric acid. The aromatic dibasic acid is one or more of terephthalic acid and isophthalic acid. The trihydric alcohol is one or more of glycerin and trimethylolpropane. The dihydric alcohol is one or more of neopentyl glycol, 2-methylpropanediol, ethylene glycol, ...

specific Embodiment 1

[0045] (1) Preparation of polyesterimide resin

[0046] 50 grams of benzoic acid, 50 grams of butyric acid, 60 grams of terephthalic acid, 60 grams of isophthalic acid, 50 grams of trimellitic anhydride, 50 grams of 4,4'-diaminodiphenylmethane, 40 grams of triethanolamine, and 70 grams of glycerin gram, 50 grams of trimethylolpropane, 20 grams of neopentyl glycol, 40 grams of ethylene glycol, 30 grams of monoethanolamine, and 4 grams of organic titanium-antimony composite catalyst are put into the reaction bottle, start heating, and wait for most of the materials to melt Start stirring at the same time, and then implement the following process conditions: 100°C to 180°C for 1.5 hours, 180°C to 200°C for 2.5 hours, 200°C to 220°C for 2 hours, maintain 220°C for 2 hours, then 220°C and 0.01- 0.09MPa negative pressure to extract xylene for 20 minutes to obtain polyesterimide resin. The technical index of prepared polyesterimide resin is: acid value 2.5mgKOH / g, hydroxyl value 280...

specific Embodiment 2

[0053] (1) Preparation of polyesterimide resin

[0054] 40 grams of abietic acid, 60 grams of stearic acid, 70 grams of terephthalic acid, 50 grams of isophthalic acid, 45 grams of trimellitic anhydride, 50 grams of 4,4'-diaminodiphenylmethane, 35 grams of triethanolamine, glycerin 70 grams, 55 grams of trimethylolpropane, 10 grams of neopentyl glycol, 50 grams of ethylene glycol, 25 grams of monoethanolamine, and 4 grams of organic titanium-antimony composite catalyst are put into the reaction bottle, and start heating. Start stirring when melting, and then implement the following process conditions: 100°C to 180°C for 1.5 hours, 180°C to 200°C for 2.5 hours, 200°C to 220°C for 2 hours, maintain 220°C for 2 hours, then 220°C and 0.01 -0.09MPa negative pressure to extract xylene for 20 minutes to obtain polyesterimide resin. The technical index of prepared polyesterimide resin is: acid value 2.2mgKOH / g, hydroxyl value 260mgKOH / g, number average molecular weight 6200 (gel perm...

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PUM

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Abstract

The invention discloses direct welding polyester imine enamel wire paint and a preparation method thereof. Firstly, polyester imine resin generates from monacid, aromatic dicarboxylic acid, 4-methacryoxypropyl, 4, 4'-diaminodiphenyl-methane, trihydric alcohol, triethanolamine, dihydric alcohol and monoethanolamine through the melt copolycondensation under the function of catalyst; secondly, modified etherifying amino resin is prepared from melamine, urea, benzoguanamine, 37 percent of formaldehyde, methanol, isopropanol and normal butyl alcohol through the hydroxymethylation and etherification; thirdly, modified etherified phenolic resin is prepared from technical xylenol, isopropylidene diphenol, boric acid, 37 percent of formaldehyde, methanol, isopropanol and normal butyl alcohol through the hydroxymethylation and etherification; finally, three products obtained through the three steps are mixed with mixed environmental solvent according to the quality ratio of 1-1.9 to 0.2-0.9 to 0.2-0.9 to 8 to obtain the direct welding polyester imine enamel wire paint. The enamel wire painted through the enamel wire paint of the invention can be welded directly under the condition of not higher than 400 DEG C and the stretch of the enamel wire paint or the fluting of zero pinhole can be realized.

Description

technical field [0001] The invention relates to a direct-weldable polyesterimide wire enamel and a preparation method thereof. Background technique [0002] Polyester wire enamel is an earlier type of wire enamel. The polyester enameled wire produced by it has good adhesion, insulation and mechanical properties, but its thermal shock performance is poor, and the heat resistance level can only reach Class B, which makes ordinary polyester enameled wire enamel useless in applications with slightly higher requirements. Restricted, so various modified polyester wire enamel varieties have been developed. The more successful modified variety of modified polyester wire enamel is polyesterimide wire enamel, and its heat resistance grade can reach F grade, H grade, or even C grade. At present, polyesterimide wire enamel has been widely used in special motors and occasions requiring high heat resistance. [0003] In recent years, with the rapid development of electronics, electrici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D5/25H01B3/30
Inventor 左晓兵苏志才韩培培朱亚辉
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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