Production method of 180-level polyurethane wire enamel

A production method and technology of polyurethane paint, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as risks for downstream users, and achieve the effects of reducing energy consumption, controlling production costs, and protecting the environment

Active Publication Date: 2014-09-03
NANTONG BAICHUAN NEW MATERIAL CO LTD +2
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  • Abstract
  • Description
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Problems solved by technology

Since the REACH regulations issued by the European Union have included tributyltin oxide, dibutyltin and other organo

Method used

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Examples

Experimental program
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Example Embodiment

[0044] Example 1

[0045] A kind of production method of 180 grade polyurethane wire enamel, the step comprises:

[0046] (1) Preparation of primary polyurethane with excess hydroxyl groups:

[0047] (1a) Raw material preparation:

[0048] 1,4-cyclohexanedimethanol: 50kg,

[0049] Neopentyl glycol: 140kg,

[0050] Trimethylolpropane: 120kg,

[0051] m / p cresol for dissolving: 400kg,

[0052] Pure MDI: 375kg,

[0053] m / p cresol: 200kg,

[0054] Xylene: 300kg;

[0055] (1b) Put 1,4-cyclohexanedimethanol, neopentyl glycol, trimethylolpropane and m- / p-cresol for dissolving into reactor A equipped with steam heating according to the set mass, and start stirring , keep the rotating speed of 50rpm, open and adjust the valve opening of the steam into the reactor A jacket, so that the material in the reactor A slowly rises to 49±2°C;

[0056] (1c) Put the steel drum packed with pure MDI in a water bath at 49±2°C, keep the temperature constant for 4 hours, then pour the molten...

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Abstract

The invention discloses a production method of 180-level polyurethane wire enamel; hydroxyl-surplus primary polyurethane and a polyurethane closure are used for preparing a paint, during synthesis of the hydroxyl-surplus primary polyurethane, m-cresol/p-cresol is used for dissolving 1, 4-cyclohexanedimethanol, neopentyl glycol and trimethylolpropane, then pure MDI (methylene diphenyl diisocyanate) melted and liquefied in advance is used for reaction, and then the m-cresol/p-cresol and xylene are used for dilution; when in synthesis of the polyurethane closure, first the trimethylolpropane is added, then xylenol is used to dissolve the trimethylolpropane, then under the protection of nitrogen, the liquefied MDI is added, the MDI and the trimethylolpropane first react for chain extension reaction, then the cresol and the xylene are used for dilution; the hydroxyl-surplus primary polyurethane and the polyurethane closure are used for preparing the paint in a set ratio. The 180-level polyurethane wire enamel has excellent performances of heat shock resistance and softening breakdown resistance, is energy-saving in production process, may not produce by-products which are harmful to the environment, and is conducive to environment protection.

Description

technical field [0001] The invention relates to a production method of polyurethane wire enamel, in particular to a production method of 180-grade polyurethane wire enamel, which belongs to the field of wire enamel production. Background technique [0002] With the development of modern industry, people have higher and higher requirements for electrical and electronic equipment in terms of safety, high efficiency, and energy saving, and electrical and electronic equipment is also showing a trend towards small and light weight. However, the miniaturization and lightening of components will inevitably lead to an increase in the temperature of their working environment, and the heat resistance level of the enameled wire varnish that plays an insulating role in the coils of components also needs to be increased accordingly. The main items to measure the heat resistance of enameled wire are thermal shock resistance and softening breakdown resistance. [0003] If it is said that ...

Claims

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Application Information

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IPC IPC(8): C09D175/04C08G18/76C08G18/32C08G18/10
Inventor 郑铁江薛建军冯晓奇肖春生陈惠丽
Owner NANTONG BAICHUAN NEW MATERIAL CO LTD
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