Insulation paint and preparation method thereof

An insulating paint, stirring reaction technology, applied in insulators, coatings, electrical components and other directions, can solve the problems of poor high temperature resistance, poor hydrolysis resistance of insulating paint, etc., to improve hydrolysis resistance, improve high temperature resistance, improve The effect of cohesion

Inactive Publication Date: 2017-10-20
CHANGZHOU SIYU ENVIRONMENTAL PROTECTION MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem to be solved by the present invention: Aiming at the disadvantages of poor hydrolysis resistance and poor high temperature resistance of the current insulating varnish, an insulating varnish and its preparation method are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Take 10g of itaconic acid and 15g of 2,2-di(4-hydroxyphenyl)propane into a four-necked flask with a thermometer and a reflux device, move the four-necked flask into an oil bath, and control the temperature of the oil bath to 130°C , feed nitrogen into the four-necked flask, and control the rate of nitrogen feeding to 3mL / min. Under nitrogen protection, add 3 mL of sulfuric acid solution with a mass fraction of 98% to the four-necked flask, stir and react for 2 hours, then cool down to 85 ℃, and add 25g N-methylolacrylamide and 0.3g initiator, after stirring for 3 hours, add 5g of chain terminator, continue stirring and reacting for 40min, after the reaction, stop feeding nitrogen to obtain the product, take 100g of sericite Put it into a freeze pulverizer and pulverize it for 30 minutes to obtain sericite powder, add sericite powder, 3g potassium permanganate, 200mL mass fraction of 40% sulfuric acid solution and 100mL mass fraction of 65% nitric acid solution into the b...

example 2

[0030]Take 13g of itaconic acid and 18g of 2,2-bis(4-hydroxyphenyl)propane and add them into a four-necked flask equipped with a thermometer and a reflux device, move the four-necked flask into an oil bath, and control the temperature of the oil bath to 135°C , feed nitrogen into the four-necked flask, control the rate of nitrogen feeding to 4mL / min, under nitrogen protection, add 4 mL of sulfuric acid solution with a mass fraction of 98% to the four-necked flask, stir for 3 hours, then cool down to 90 ℃, and add 28g N-methylolacrylamide and 0.4g initiator, after stirring for 4 hours, add 7g chain terminator, continue to stir and react for 45min, after the reaction, stop feeding nitrogen to obtain the product, take 150g sericite Put it into a freeze pulverizer and pulverize it for 35min to obtain sericite powder, add sericite powder, 4g potassium permanganate, 250mL mass fraction of 40% sulfuric acid solution and 150mL mass fraction of 65% nitric acid solution into the beaker, ...

example 3

[0032] Take 15g of itaconic acid and 20g of 2,2-bis(4-hydroxyphenyl)propane into a four-necked flask with a thermometer and a reflux device, move the four-necked flask into an oil bath, and control the temperature of the oil bath to 140°C , feed nitrogen into the four-necked flask, and control the nitrogen feed rate to 5mL / min. Under nitrogen protection, add 5 mL of sulfuric acid solution with a mass fraction of 98% into the four-necked flask, stir for 3 hours, and then cool down to 95 ℃, and add 30g N-methylolacrylamide and 0.5g initiator, after stirring for 4 hours, add 8g of chain terminator, continue to stir and react for 50min, after the reaction, stop feeding nitrogen to obtain the product, take 200g of sericite Put it into a freeze pulverizer and pulverize it for 40min to obtain sericite powder, add sericite powder, 5g potassium permanganate, 300mL mass fraction of 40% sulfuric acid solution and 200mL mass fraction of 65% nitric acid solution into the beaker, and move th...

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Abstract

The invention discloses insulation paint and a preparation method thereof, which belongs to the field of insulation materials. The insulation paint is prepared in the following steps: performing esterification for itaconic acid and 2,2-bis(4-hydroxyphenyl)propane, then polymerizing with N-hydroxymethyl acrylamide to obtain modified polyester, performing carboxylation and acylating chlorination treatment for sericite, then performing the reaction with diamine to obtain modified sericite, finally facilitating the reaction of the modified polyester, the carbonized diimine, catalyst, modified sercite, additives and water, and then ultrasonically dispersing to obtain insulation paint. The insulation paint has the beneficial effects that the hydrolysis of an ester group is inhibited by utilizing the effect of steric hindrance generated by two benzene rings connected with neopentyl in a modified polyester macromolecule for protecting the ester group, and by adding the carbodiimide, the effect of the carboxyl for promoting the hydrolysis reaction is inhibited; and by introducing the sericite into the modified polyester structure, the high temperature resistance of the modified polyester is improved.

Description

technical field [0001] The invention relates to an insulating varnish and a preparation method thereof, belonging to the field of insulating materials. Background technique [0002] Insulating varnish is an indispensable material in the modern electrical industry. It can play a good role in insulating and protecting electronic devices, conductor wires, etc. Insulating varnish is generally composed of three parts: lacquer base, solvent or thinner and auxiliary materials. composition. [0003] In recent years, people have successively developed H-level, C-level and F-level fiber-wrapped electromagnetic wire bonding insulating varnishes. H-level bonding insulating varnish has the disadvantages of small output and high cost. Silicone resin has the advantages of excellent oxidation resistance, etc., and it has been successfully used in the insulation system of high-performance variable frequency traction motors as a C-class solvent-free impregnating varnish, but its mechanical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C09D5/25C09D7/12C08F283/01C08F220/58C08F2/38C08G63/16
CPCC09D151/08C08F2/38C08F283/01C08G63/16C08L2201/08C08L2205/03H01B3/308C08F220/58C08L83/04C08L71/02C08K9/02C08K9/04C08K3/34C08K5/29
Inventor 王峰方晓俊宋玲
Owner CHANGZHOU SIYU ENVIRONMENTAL PROTECTION MATERIAL SCI & TECH
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