Polyesteramide imide wire enamel and preparation method thereof
A technology of polyester amide imide and enameled wire varnish, applied in the field of polyester amide imide enameled wire varnish and its preparation, can solve the problems of poor surface state of enameled wire, influence on performance, inability of enameled wire varnish to achieve good leveling and the like, Achieving the effect of wide process margin, good coatability and improved heat resistance
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Example Embodiment
[0019] Example 1
[0020] The reaction device was filled with pure nitrogen, 0.5 part of 4,4'-diphenylmethane diisocyanate was added, heated to 50°C and completely melted, 0.5 part of trimellitic anhydride was added with stirring, and heated to 70-80°C to react for 6 hours. Add 1 part of cresol, increase the temperature to 130°C, and keep it for 3 hours. Then, add 2 parts of ethylene glycol, 0.6 parts of glycerin and 1 part of terephthalic acid under stirring, increase the temperature to 220°C at a rate of about 10°C per hour, keep it for 2 hours, and evacuate to the theoretical liquid output. Add some cresol solvent to lower the temperature to 180°C and keep it for 3 hours.
[0021] Take the resin prepared above, add some cresol and xylene, stir and dilute to the required solid content.
[0022] The enameled wire is coated with the polyester enameled wire paint prepared according to the above steps.
Example Embodiment
[0023] Example 2
[0024] The reaction device was flushed with pure nitrogen, and 1 part of 4,4'-diphenylmethane diisocyanate was added. After being heated to 50°C and completely melted, 1 part of trimellitic anhydride was stirred and added, and the reaction was heated to 70-80°C for 6 hours. Add 1 part of cresol, increase the temperature to 130°C, and keep it for 3 hours. Then add 3 parts of ethylene glycol, 1.2 parts of glycerin and 2 parts of terephthalic acid under stirring, and heat up to 220°C at a rate of about 10°C per hour, keep it for 2 hours, and vacuum to the theoretical liquid output. Add a few cresol solvents to lower the temperature to 180°C and keep it for 3 hours.
[0025] Take the resin prepared above, add some cresol and xylene, stir and dilute to the required solid content.
[0026] The enameled wire is coated with the polyester enameled wire paint prepared according to the above steps.
Example Embodiment
[0027] Example 3
[0028] The reaction device was flushed with pure nitrogen, and 1 part of 4,4'-diphenylmethane diisocyanate was added. After being heated to 50°C and completely melted, 1 part of trimellitic anhydride was stirred and added, and the reaction was heated to 70-80°C for 6 hours. Add 1 part of cresol, increase the temperature to 130°C, and keep it for 3 hours. Then, add 2 parts of ethylene glycol, 0.6 parts of glycerin and 1 part of terephthalic acid under stirring, increase the temperature to 220°C at a rate of about 10°C per hour, keep it for 2 hours, and evacuate to the theoretical liquid output. Add a few cresol solvents to lower the temperature to 180°C and keep it for 3 hours.
[0029] Take the resin prepared above, add some cresol and xylene, stir and dilute to the required solid content.
[0030] The enameled wire is coated with the polyester enameled wire paint prepared according to the above steps.
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