A kind of heat-resistant self-adhesive enameled wire varnish and preparation method thereof

A self-adhesive enameled wire varnish, heat-resistant technology, applied in coatings, epoxy resin coatings, etc., can solve problems such as difficulty in overcoming enameled wire wet sticking defects, failure to meet production needs, easy cracking and aging of the paint film, and improve adhesion Strength and molding mechanical strength, beneficial to stability, and the effect of improving alignment

Active Publication Date: 2017-12-12
江苏佳禾电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the characteristics of the polyamide molecular structure, the cracking temperature is generally around 350°C, and the paint film is easy to crack and age at high temperatures, so it cannot meet the heat resistance requirements of ≥ 200°C;
[0005] 2. The winding coil formed by hot-melt bonding of the self-adhesive layer has insufficient mechanical rigidity, poor dimensional stability, and easy deformation of the product, especially at ≥155°C;
[0006] 3. Due to the inherent hygroscopicity of polyamide resin, it is difficult for this type of self-adhesive paint to overcome the wet sticking defect of finished enameled wire products (finished enameled wire adhesion), and cannot meet the production needs under high temperature and high humidity climate conditions

Method used

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  • A kind of heat-resistant self-adhesive enameled wire varnish and preparation method thereof
  • A kind of heat-resistant self-adhesive enameled wire varnish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 350 parts of xylene and 430 parts of N-methylpyrrolidone (water content ≤ 0.05%) into a reaction kettle with a stirrer, stir and mix evenly, turn on and heat to 50°C, adopt a step-by-step feeding method, and put 169 parts in 15 minutes Parts of polyetherimide resin (heat distortion temperature is 208°C under the condition of 1.82Mpa) particles, and at the same time, stir and gradually increase the temperature to 110°C, keep it for 2h, until it is completely dissolved, and obtain mixture A; cool mixture A to 60°C , put in 17.2 parts of FB resin, keep warm for 1.5h, until the resin is uniform, then cool down to 45°C, add 33.8 parts of preheated phenol-formaldehyde epoxy resin, keep warm for 1h, until the mixture is evenly stirred to obtain mixture B; Put 0.2 parts of BYK-310 slip agent into the mixture, stir evenly and then filter, the obtained filtrate is heat-resistant self-adhesive wire enamel.

[0031] The heat-resistant self-adhesive wire enamel prepared in this ...

Embodiment 2

[0033] Add 270 parts of xylene and 510 parts of N-methylpyrrolidone (water content ≤ 0.05%) into a reactor with a stirrer, stir and mix evenly, turn on and heat to 55°C, adopt a step-by-step feeding method, and put 176 Parts of polyetherimide resin (heat distortion temperature is 210°C under the condition of 1.82Mpa) particles, and while stirring, the temperature is gradually raised to 105°C, and the temperature is kept for 2.5h until it is completely dissolved to obtain the mixture A; the mixture A is cooled to 60 ℃, put in 17.6 parts of FB resin, keep it warm for 1.5h, until the resin is uniform, then cool down to 45°C, add 26.4 parts of preheated phenol-formaldehyde epoxy resin, keep it warm for 1.5h, until it is evenly stirred to obtain mixture B; Put 0.2 parts of BYK-310 slip agent into the mixture B, stir well and then filter, the obtained filtrate is heat-resistant self-adhesive wire enamel.

[0034] The heat-resistant self-adhesive wire enamel prepared in this example ...

Embodiment 3

[0036] Add 230 parts of xylene and 550 parts of N-methylpyrrolidone (water content ≤ 0.05%) into a reaction kettle with a stirrer, stir and mix evenly, turn on and heat to 60°C, adopt a step-by-step feeding method, and put 183 Parts of polyetherimide resin (heat distortion temperature is 208°C under the condition of 1.82Mpa) particles, and at the same time, stir and gradually increase the temperature to 110°C, keep it for 3h, until it is completely dissolved, and obtain mixture A; cool mixture A to 65°C , put in 18.3 parts of FB resin, keep it warm for 1 hour, until the resin is uniform, then cool down to 50°C, add 18.7 parts of preheated phenol-formaldehyde epoxy resin, keep it warm for 1 hour, until it is evenly stirred to obtain mixture B; Add 0.2 parts of BYK-310 slip agent, stir evenly and then filter, the obtained filtrate is heat-resistant self-adhesive wire enamel.

[0037] The heat-resistant self-adhesive wire enamel prepared in this example is a transparent homogeneo...

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Abstract

The invention relates to heat-resistant self-adhesive enamelled wire paint. The heat-resistant self-adhesive enamelled wire paint disclosed by the invention comprises the following raw materials in parts by weight: 160-350 parts of dimethylbenzene, 430-620 parts of N-methylpyrrolidone, 169-191 parts of polyetherimide resin, 10-18.3 parts of boron phenolic resin, 19-33.8 parts of phenol formaldehyde epoxy resin, and 0.2-0.3 part of a slipping agent. The heat-resistant self-adhesive enamelled wire paint disclosed by the invention has good heat resistance and wet-sticky-resistant property, and can meet production requirements under high-temperature and high-humidity weather conditions.

Description

technical field [0001] The invention relates to a preparation method of enameled wire self-adhesive varnish, in particular to a preparation method of heat-resistant self-adhesive enameled wire varnish. Background technique [0002] Heat-resistant enameled wire self-adhesive wire is one of the technical development directions of self-adhesive enameled wire. Generally speaking, self-adhesive paints with heat resistance (resoftening temperature) ≥ 155°C (Class F) are called heat-resistant self-adhesive paints. [0003] The main varieties of heat-resistant self-adhesive wire enamel that have been successfully researched are specially modified high-melting point aliphatic copolyamide (PA) or semi-aromatic polyamide resin (Semi Aromatic PA). Features, the enameled wire made of this type of self-adhesive paint has good abrasion resistance and bonding strength, but at the same time has the following shortcomings: [0004] 1. Due to the characteristics of the polyamide molecular st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/08C09D163/00C09D7/12C09D7/00
CPCC08L2201/08C08L2205/03C08L2205/035C09D7/20C09D7/63C09D7/65C09D179/08C08L63/00C08L61/06C08L67/00C08K5/20
Inventor 王成宜陈永凤史昌明
Owner 江苏佳禾电子材料有限公司
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