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Preparation method of polyurethane adhesive for electrical device

A technology of polyurethane adhesives and electrical equipment, applied in the field of polyurethane adhesives, can solve the problems of adhesive electrical insulation performance decline, affect the use of electrical equipment, poor antibacterial, antibacterial and mildew resistance, etc., to improve thermal aging performance, improve aging resistance, improve The effect of mechanical properties

Inactive Publication Date: 2018-09-14
安徽大松树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyurethane adhesives have poor antibacterial, antibacterial, and mildew resistance. When the adhesive is corroded by mold, the electrical insulation performance of the adhesive will decrease due to the mold’s certain electrical conductivity, which will affect the use of electrical equipment. In addition, the polyurethane adhesive will be damaged when it is used. The influence of heat dissipation of electrical components makes the ambient temperature rise and is easy to age

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of polyurethane adhesive for electric equipment that the present invention proposes comprises the following steps:

[0021] S1. Add 1,4-butanediamine to isopropanol, adjust the pH of the system to 4.5-5.0 with concentrated hydrochloric acid, add the aqueous solution of cyanamide dropwise under ice bath, stir, and heat up to react. After the reaction is completed, add three Ethanolamine was stirred, concentrated, and the residue was recrystallized to obtain material a;

[0022] S2. Mix white carbon black, carbon nanotubes, bentonite, titanium dioxide, flame retardant, and plasticizer uniformly to obtain material b;

[0023] S3, dehydrating the hydroxyl-terminated polybutadiene, tetrahydrofuran-propylene oxide copolyether triol, and polyethylene adipate diol, and then adding isophorone diisocyanate and dilauric acid under nitrogen protection Acetate dibutyltin and N-methylmorpholine, heat up, stir and react to obtain polyurethane prepolymer;

[00...

Embodiment 2

[0026] The preparation method of polyurethane adhesive for electric equipment that the present invention proposes comprises the following steps:

[0027] S1. Add 6 parts of 1,4-butanediamine to 50 parts of isopropanol, adjust the pH of the system to 4.5 with 5 mol / L concentrated hydrochloric acid, and slowly add 10 parts of 50% cyanamide in an ice bath Aqueous solution, stirred for 40 minutes, then heated to 40°C, reacted for 4 hours, added 3 parts of triethanolamine, stirred, concentrated, and the residue was recrystallized to obtain material a;

[0028] S2. According to the weight ratio of 12:3:7:9:3:4, white carbon black, carbon nanotubes, bentonite, titanium dioxide, flame retardant, and plasticizer were respectively mixed uniformly to obtain material b;

[0029] S3. Dehydrate the hydroxyl-terminated polybutadiene, tetrahydrofuran-propylene oxide copolyether triol, and polyethylene adipate glycol at 105°C and -0.095MPa using a rotary evaporator, and then put the Add isoph...

Embodiment 3

[0032] The preparation method of polyurethane adhesive for electric equipment that the present invention proposes comprises the following steps:

[0033] S1. Add 9 parts of 1,4-butanediamine to 60 parts of isopropanol, adjust the pH of the system to 5.0 with 5 mol / L concentrated hydrochloric acid, and slowly add 12 parts of 50% cyanamide in an ice bath The aqueous solution was stirred for 60 minutes, then heated to 50°C, reacted for 7 hours, 5 parts of triethanolamine was added thereto, stirred, concentrated, and the residue was recrystallized to obtain material a;

[0034] S2. According to the weight ratio of 18:5:11:13:5:6, white carbon black, carbon nanotubes, bentonite, titanium dioxide, flame retardant, and plasticizer were respectively mixed uniformly to obtain material b;

[0035] S3. Dehydrate the hydroxyl-terminated polybutadiene, tetrahydrofuran-propylene oxide copolyether triol, and polyethylene adipate glycol at 110°C and -0.095MPa using a rotary evaporator, and th...

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Abstract

The invention discloses a preparation method of a polyurethane adhesive for an electrical device, and relates to the technical field of polyurethane adhesives. The preparation method includes the steps: adding 1, 4-butanediamine into isopropyl alcohol, adjusting pH (potential of hydrogen), dripping hydrogen cyanamide under ice-bath, stirring mixture, heating the mixture to perform reaction, addingtriethanolamine, and performing stirring, concentration and re-crystallization to obtain a material a; mixing white carbon black, carbon nano-tubes, bentonite, titanium dioxide, flame retardants andplasticizers to obtain a material b; performing dehydration on hydroxyl-terminated polybutadiene, tetrahydrofuran-epoxypropane copolyether triol and polyethylene glycol adipate glycol, adding isophorone diisocyanate, dibutyltin dilaurate and N-methyl morpholine under protection of nitrogen, and heating and stirring mixture to obtain a polyurethane prepolymer; adding diethanol amine, the material aand benzyl bichloride to perform stirring reaction, adding the material b, stirring mixture to obtain the polyurethane adhesive. The polyurethane adhesive has excellent antibacterial and mold-proof performance, electric insulation performance and heat stability and can keep good electric insulation performances at high temperature.

Description

technical field [0001] The invention relates to the technical field of polyurethane adhesives, in particular to a preparation method of polyurethane adhesives for electrical equipment. Background technique [0002] Polyurethane adhesive has good oil resistance, ozone resistance, radiation resistance, low temperature performance, electrical insulation, and bonding performance, and is widely used in the sealing of electrical equipment. However, polyurethane adhesives have poor antibacterial, antibacterial, and mildew resistance. When the adhesive is corroded by mold, the electrical insulation performance of the adhesive will decrease due to the mold’s certain electrical conductivity, which will affect the use of electrical equipment. In addition, the polyurethane adhesive will be damaged when it is used. The influence of heat dissipation of electrical components makes the ambient temperature rise, which is easy to age. Contents of the invention [0003] Based on the technic...

Claims

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Application Information

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IPC IPC(8): C09J175/06C08G18/75C08G18/69C08G18/48C08G18/42C08G18/38C08G18/32C08G18/12C08G18/20C08G18/24
CPCC09J175/06C08G18/12C08G18/2018C08G18/242C08G18/4238C08G18/4854C08G18/69C08G18/755C08G18/3819C08G18/3275C08G18/3895C08G18/3897
Inventor 朱立芳
Owner 安徽大松树脂有限公司
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