Method for preparing solventless unsaturated polyester-imide wire coating enamel

A technology of polyesterimide and enameled wire varnish, which is applied in coatings, plastic/resin/wax insulators, organic insulators, etc., can solve the problems of large environmental pollution and high energy consumption, and achieve short baking time, high filling rate, The effect of less volatilization loss

Inactive Publication Date: 2009-08-26
上海新天和树脂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyesterimines synthesized by these two methods have solvents at present, such as Chinese Patent No. ZL02137359.0 and Patent Application No. 200710190244.0, which generally use cresol and xylenol as solvents, which are very polluting to the environment and consume more energy. also high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put 208g of ethylene glycol, 162g of propylene glycol, 130g of diethylene glycol, 316g of phthalic anhydride, and 329g of maleic anhydride into a 2000ml four-neck flask, and keep warm at 160°C for 1 hour, then slowly raise the temperature to 200°C. The acid value dropped to 46.2mgKOH / g. Cool down to 120°C, add 234g of trimellitic anhydride, 121g of 4,4-diaminodiphenylmethane, and keep warm at 130-150°C until the material is transparent. After 1 hour of heat preservation, slowly raise the temperature to 200-205°C until the acid value is 28.7mgKOH Stop the reaction after / g, lower the temperature to below 180°C, add diallyl phthalate, styrene, tetrabutyl titanate, adjust the viscosity and solid content to pass, and pack.

Embodiment 2

[0027] Put 199g of ethylene glycol, 156g of propylene glycol, 61g of neopentyl glycol, 27g of glycerin, 316g of isophthalic acid, and 315g of maleic anhydride into a 2000ml four-necked flask, and keep warm at 160°C for 1 hour, then slowly heat up to 200°C °C, the acid value dropped to 42.7mgKOH / g. Cool down to 120°C, add 281g of trimellitic anhydride, 145g of 4,4-diaminodiphenylmethane, keep warm at 130-150°C until the material is transparent, after 1 hour of heat preservation, slowly raise the temperature to 200-205°C until the acid value is 27.2mgKOH Stop the reaction after / g, lower the temperature to below 180°C, add diallyl phthalate, styrene, tetrabutyl titanate, adjust the viscosity and solid content to pass, and pack.

Embodiment 3

[0029] Put 98.7g of ethylene glycol, 274.11g of propylene glycol, 138.4g of trishydroxyethyl isocyanurate, 272.3g of isophthalic acid, and 306.5g of maleic anhydride into a 2000ml four-necked flask, and keep it warm at 160°C for 1 Hours later, the temperature was slowly raised to 200°C, and the acid value dropped to 41.4mgKOH / g. Cool down to 120°C, add 203.4g of trimellitic anhydride, 106.1g of 4,4-diaminodiphenyl ether, keep warm at 130-150°C until the material is transparent, after 1 hour of heat preservation, slowly raise the temperature to 200-205°C until the acid value Stop the reaction after 26.5mg KOH / g, lower the temperature to below 180°C, add diallyl phthalate, styrene, tetrabutyl titanate, adjust the viscosity and solid content to pass, and pack.

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PUM

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Abstract

The invention relates to a method for preparing solventless unsaturated polyester-imide wire coating enamel. The method comprises preparation of unsaturated polyester-imide and processing of paint mixing, wherein the unsaturated polyester-imide is prepared by the following steps: first step, adding polylol, dibasic acid or estolide into a reaction kettle according to a mol ratio of 1.05-1.5:1; stirring and heating the mixture to a temperature of between 160 and 170 DEG C; preserving the heat for 0.5 to 2 hours; and slowly heating the mixture to a temperature of between 200 and 205 DEG C until the acid value is no less than 50 mg KOH/g; and second step, cooling the mixture to a temperature of between 110 and 120 DEG C, adding trimellitic anhydride and diamine with the mol ratio of 2:1, and preserving the heat at a temperature of between 130 and 150 DEG C until the material is transparent; and after 1 hour of heat preservation, slowly heating the material to a temperature of between 200 and 205 DEG C until the acid value is no less than 30 mg KOG/g. Machine winding dipped by the solventless resin has the advantages of small volatilization loss, high filling rate, few times of paint dipping, short baking time, strong binding power, excellent performance of electrical appliance, environmental pollution reduction, and the like.

Description

technical field [0001] The invention relates to a preparation method of wire enamel, in particular to a preparation method of solvent-free unsaturated polyesterimide wire enamel. Background technique [0002] Enameled wire enamel is an important electrical insulation material, which is mainly coated on the outer layer of various types of bare copper wires with different diameters. It is generally formed by repeatedly coating enameled wire enamel on the conductor with an enamelling machine and baking at high temperature. The function of the enameled wire varnish is to create a good insulating layer between the wires in the winding to prevent the flow of current. This layer of insulating layer can maintain its original performance under the action of long-term moisture, heat, chemical impregnation and various mechanical forces such as friction, bending, stretching, compression, impact, etc. In addition to excellent insulation properties, it can also have high mechanical stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D5/25H01B3/42
Inventor 林定多陈志祥何炜
Owner 上海新天和树脂有限公司
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