A kind of water-soluble polyester imide insulating paint and preparation method thereof

A technology of polyester imide and insulating varnish, applied in the direction of coating, etc., can solve the problems of poor mechanical strength and poor heat resistance of water-based insulating varnish, achieve high sealing efficiency, improve mechanical strength, and improve hydrolysis resistance Effect

CN109385204BActive Publication Date: 2021-04-23湖北长海新能源科技有限公司 +1

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: 湖北长海新能源科技有限公司
Publication Date: 2021-04-23

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Abstract

The invention discloses a water-soluble polyester imide insulating varnish, which comprises the following components in parts by weight: 145-200 parts of dibasic acid and / or dibasic acid anhydride, 7.5-16 parts of polybasic acid anhydride, dibasic alcohol 90 to 160 parts, 18 to 55 parts of polyols, 2 to 8 parts of diamines and 18 to 23 parts of glycidyl tertiary carbonic acid esters, the diols include hydrophilic functional diols, and the hydrophilic functional The dihydric alcohol is a dihydric alcohol containing a carboxyl group and / or a sulfonic acid group. The present invention introduces hydrophilic functional diols and polyols into the molecular chain of polyester imide, so that the molecular chain contains a certain amount of hydroxyl, carboxyl and / or sulfonate groups, thereby endowing the entire polyester imide The imine molecular chain is water-soluble and provides cross-linking points for intermolecular cross-linking reactions, thereby improving properties such as mechanical strength, heat resistance, water resistance, and storage stability. The invention also provides a preparation method of the water-soluble polyester-imide insulating varnish.

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Description

technical field

[0001] The invention relates to the technical field of insulating impregnating resins, in particular to a water-soluble polyester-imide insulating varnish and a preparation method thereof. Background technique

[0002] During the insulation impregnation process of various domestic motor manufacturers, the insulation impregnation varnish used contains a large amount of flammable, explosive, toxic and harmful solvents or thinners such as toluene, xylene, styrene, solvent oil, etc., which inevitably causes factories Environmental pollution and human health damage. With the continuous improvement of environmental protection requirements in various countries, the materials used in motor products exported to foreign countries are being restricted more and more strictly. Therefore, the development and application of environmentally friendly insulating impregnating varnishes with low viscosity and low organic volatile content are imminent.

[0003] At present, water...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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