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Preparation of wire coated paint of polyester paint and polyester imine paint by using terephthalic acid

A technology of polyester wire enamel and terephthalic acid, which is applied in the field of polyesterimide wire enamel and polyester production, and can solve the problems of easy sublimation of dimethyl terephthalate, blockage of condensers, and large environmental pollution. To achieve the effect of easy control of the process, increase of line speed and uniform molecular weight

Inactive Publication Date: 2005-09-21
杨朝选
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AI Technical Summary

Problems solved by technology

The main disadvantage of this method is: in the production process, dimethyl terephthalate is easy to sublimate and block the condenser, and the by-product methanol generated in addition has a greater environmental pollution

Method used

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  • Preparation of wire coated paint of polyester paint and polyester imine paint by using terephthalic acid

Examples

Experimental program
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Embodiment Construction

[0019] Weigh 260 kg of terephthalic acid, 100 kg of ethylene glycol, and 90 kg of glycerin, put them into a 1000-liter oil-heated stainless steel reactor, add 0.02 kg each of zinc acetate and catalyst Pt, and heat up to 200-220 °C, strictly Control the outlet temperature of the fractionation column between 110-115°C. Stir and react stably for 8-10 hours. After esterification, keep warm at 220°C, carry out vacuum polycondensation reaction, release the vacuum after reaching the required viscosity, add 400 kg of cresol, dissolve evenly, and cool down to below 100°C , add 280 kg of xylene to dilute, and at the same time add 15 kg of butyl orthotitanate and 3-5 kg ​​of leveling agent, and mix well.

[0020] The production of polyesterimide wire enamel is to cool down to 140°C after esterification, add 68 kg of trimellitic anhydride and 47 kg of 4,4'-diaminodiphenyl ether, gradually raise the temperature to 180°C, and react for 1 hour Afterwards, the temperature was raised to 220° ...

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Abstract

The invention relates to a method for producing polyester, polyurethane glazed wire paint using terephthalic acid, which solves the problems of molecular weight disproportion, paint film continuity in the polyester fibre industrial process and clogging condensator easily, the environmental contamination by byproduct carbinol in the dimethyl terephthalate industrial process. The copper wires used in different standard as well as the polyester enamelled wire paint and polyurethane glazed wire paint allowable different needle speed are produced by controlling exit temperature of the dephlegmating column and other technological parameter strictly,

Description

technical field [0001] The invention relates to a basic raw material for producing polyester and polyesterimide wire enamel and a corresponding method. Background technique [0002] Polyester and polyesterimide enameled wires are used as the basic materials of motors, various electrical appliances, coils, etc., and the electrical insulation and mechanical properties of the paint film attached to thin copper wires are relatively strict. At present, polyester and polyesterimide wire enamel are produced at home and abroad, and their basic resins are all polyester resins with a body-shaped network structure. This basic resin is polyol terephthalate, and its polymer structural formula is: [0003] where R can be [0004] THEIC, or other polyols. Paints with a heat resistance grade of Class B may not introduce imine genes, but enameled wire paints above Class F need to introduce imide or imide groups to modify the matrix resin. [0005] At present, there are two main materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C09D167/03
Inventor 杨朝选
Owner 杨朝选
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