Moisture resistant oilproof electromagnetic wire epoxy self-bonding paint

A technology of electromagnetic wire and self-adhesive paint, which is applied to epoxy resin coatings, coatings, insulators, etc., can solve the problems that the furnace temperature/speed is greatly affected, it is difficult to form a smooth surface, and it is difficult to control molecular weight, etc., to achieve excellent oil resistance and bonding strength, stable and easy-to-control production process, and good batch stability

Active Publication Date: 2010-10-13
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. Common industrial phenol / xylene is used as solvent, which has a strong smell, strong irritation and pollutes the environment;
[0005] 2. It is difficult to control the molecular weight during the synthesis process, resulting in uneven lacquer quality batches and affecting batch stability;
[0006] 3. The process range is small. When applying coated wire rods, the furnace temperature / speed has a great influence, and the requirements for coating applications are high, and it is difficult to form a smooth surface;
[0007] 4. The bonding force is too small, the maximum bonding force is ≤8N / mm 2 Take DY-QQBN1.60×5.10 wire as an example;
[0008] 5. Poor heat resistance, generally ≤120°C

Method used

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  • Moisture resistant oilproof electromagnetic wire epoxy self-bonding paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] According to the weight ratio, add 320 parts of cresol and 480 parts of xylene into the reaction kettle with stirring and reflux device, turn on the stirrer and heat after feeding, gradually add 40 parts of polyurethane elastomer, gradually heat up to 75 °C, Start to keep warm for 2 hours; take a sample and observe, and it will be semi-finished product A after it is completely dissolved; cool the semi-finished product A to 55 ° C, and adopt 130 parts of high-molecular-weight epoxy resin (PKHH) by gradually batch-feeding method, and adopt heat preservation and heating at the same time, control it at 50 ~55°C, fully stirred for 2 hours, sampled and observed, it became a uniform transparent liquid to obtain product B, cooled to ≤55°C, added 13 parts of phenolic resin and 13 parts of amino resin in sequence, kept stirring at 45-50°C for 1 hour , to obtain product C, and finally cooled to ≤40°C, adding 0.8 parts of titanate coupling agent and 1 part of leveling agent, stirrin...

Embodiment 2

[0048] According to the weight ratio, in the reactor with agitator and reflux pipe, add 360 parts of m-cresol, 440 parts of xylene, open the agitator and heat after feeding, gradually add 26 parts of polyurethane elastomer, gradually heat up to 80 ℃, start to keep warm for 2 hours; take a sample and observe, after it is completely dissolved, it will be semi-finished product A; cool semi-finished product A to 60 ℃, and add 144 parts of high molecular weight epoxy resin (PKHH) by adding in batches step by step. Control it at about 50-55°C, stir it well for 2 hours, take a sample and observe it, it will become a homogeneous transparent liquid, and make product B; cool down to ≤50°C, add 17 parts of phenolic resin and 10 parts of amino resin in sequence, at a temperature of 45-50°C Stir under heat preservation for 1 hour to make product C, and finally cool to ≤40°C, add 0.9 parts of titanate coupling agent and 1.2 parts of leveling agent, stir for 1 hour, cool down to make product ...

Embodiment 3

[0050] According to the weight ratio, in the reaction kettle with agitator and reflux pipe, add 400 parts of m-cresol and 400 parts of xylene, turn on the agitator and heat after feeding, gradually add 22 parts of polyurethane elastomer, and gradually heat up to 85 ℃, start to keep warm for 2 hours; take a sample and observe, after it is completely dissolved, it will be a semi-finished product A; cool the semi-finished product A to 60 ℃, and add 146 parts of high molecular weight epoxy resin (PKHH) by adding in batches step by step, and heat it with heat preservation at the same time. Control it at about 50-55°C, stir it well for 2 hours, take a sample and observe it, it will become a homogeneous transparent liquid, and make product B; lower the temperature to ≤50°C, add 25 parts of phenolic resin and 7 parts of amino resin in sequence, at a temperature of 45-50°C Stir under heat preservation for 1 hour to make product C, and finally cool to ≤40°C, add 1 part of titanate coupli...

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Abstract

The invention relates to a moisture resistant oilproof electromagnetic wire epoxy self-bonding paint meeting heat resisting requirement more than thermal level of 155 DEG C, applied to enamelled wire with high bonding strength and good surface quality. The moisture resistant oilproof electromagnetic wire epoxy self-bonding paint comprises the following components by parts by weight: 320-450 parts of methyl phenol, 350-480 parts of dimethyl benzene, 15-40 parts of polyurethane elastomer, 130-148 parts of epoxy resin, 10-30 parts of phenolic resion, 4.5-13 parts of amino resin, 0.8-1.2 parts of titanate coupling agent and 1-2 parts of flatting agent; wherein the weight-average molecular weight of the epoxy resin is 20000-30000. The main performance indexes of the manufactured product adopting the paint of the invention are as follows: 1, adhesiveness is good; 2, no cracking is produced when heat shock reaches 180 DEG C; 3, bonding strength is 11N/mm2, and the bonding strength in the JB/T6758.1-2007 standard is more than or equal to 5N/mm2.

Description

technical field [0001] The invention relates to a moisture-resistant and oil-resistant epoxy self-adhesive paint for electromagnetic wires, in particular to a hot-melt self-adhesive paint for enameled wires. Background technique [0002] Self-adhesive enameled wire is a special enameled wire variety. Due to its special bonding characteristics, it can avoid the dipping and molding process during coil production and reduce atmospheric environmental pollution. It is being adopted by more and more electronic / electrical coil production designs. The self-adhesive paint produced by self-adhesive enameled wire has been used as a key polymer synthetic material developed by various industrialized countries. [0003] As a kind of self-adhesive paint, epoxy self-adhesive paint belongs to hot-melt self-adhesive paint. Because of its excellent moisture resistance and deformation resistance, it is widely used in the manufacture of wires for special coils (such as DY coils, electric tool c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D175/04C09D161/06C09D161/20C09D7/12C09D5/00H01B17/62
Inventor 王成宜陈永凤何家文
Owner 江苏佳禾电子材料有限公司
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