Insulation stretch resistant coating, preparation method and application thereof

A technology of anti-stretching and coating, applied in the direction of polyester coating, coating, etc., can solve the problems of affecting production yield, substandard tensile performance, and insufficient withstand voltage performance

Active Publication Date: 2015-04-29
清远慧谷新材料技术有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the paint film must have high insulation. When the withstand voltage performance is insufficient, it will cause capacitor breakdown
At the same time, the stamped capacitors will be packaged on the circuit board after several times of high-temperature welding. Under high temperature, general polymer materials are prone to yellowing, which affects the appearance quality of the circuit board. Therefore, the temperature resistance of the paint film is also relatively low. demanding
At present, capacitor coatings on the market are mainly supplied by Japanese and Korean companies. Domestic coatings have black arcs on the surface of the capacitor after deep drawing, and the tensile performance is not up to standard, and the high voltage resistance is not up to standard. After the capacitor is baked at 270 ° C for 3 minutes, it turns yellow. The range of change is large, which seriously affects the appearance quality of the product
During the cleaning process of capacitors after production, due to incomplete curing of the coating, there will be anti-sticking phenomenon, which will affect the production yield

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Preparation of polyester resin A:

[0045] ①Under the condition of nitrogen protection, add 9g of bisphenolic acid, 46g of acetic anhydride and 0.1g of pyridine in sequence in the reaction flask equipped with electromagnetic stirring, thermometer and condenser tube, stir and mix evenly, after the bisphenolic acid is completely dissolved, Heated to 80°C to obtain solution A; under stirring conditions, keep solution A warm for 30 minutes, then pour solution A into hot water at 70°C, wash with hot water repeatedly, and vacuum dry in a vacuum oven at 15999Pa and 70°C for 9.5h. Obtain the bisphenolic acid acetate of white powder;

[0046] ②In the reaction flask equipped with electric stirring, thermometer and vacuum decompression device, add the bisphenolic acid acetate prepared in step ①, 9g of bisphenolic acid, 16g of 1,4-cyclohexanedimethanol and 20g of terephthalic acid Mix formic acid evenly, heat to 200°C, start the decompression device to carry out melt polymeriz...

Embodiment 2

[0052] (1) Preparation of polyester resin A:

[0053] ①Under nitrogen protection, add 13.5g of bisphenolic acid, 41g of acetic anhydride and 0.15g of pyridine in sequence in a reaction flask equipped with electromagnetic stirring, a thermometer, and a condenser, stir and mix evenly, and wait until the bisphenolic acid is completely dissolved , heated to 75°C to obtain solution A; under stirring conditions, keep solution A warm for 40 minutes, then pour solution A into hot water at 82°C, wash with hot water repeatedly, and dry in a vacuum oven at 15999Pa and 75°C for 9 hours. Obtain the bisphenolic acid acetate of white powder;

[0054] ②In the reaction flask equipped with electric stirring, thermometer and vacuum decompression device, add bisphenolic acid acetate prepared in step ①, 13.5g bisphenolic acid, 26g 1,4-cyclohexanedimethanol and 16g p-benzene Diformic acid, mixed evenly, heated to 180°C, and started the decompression device to carry out melt polymerization for 2.5 ...

Embodiment 3

[0060] (1) Preparation of polyester resin A:

[0061] ①Under the condition of nitrogen protection, add 11.5g of bisphenolic acid, 41g of acetic anhydride and 0.2g of pyridine in sequence to the reaction flask equipped with electromagnetic stirring, thermometer and condenser, stir and mix evenly, and wait until the bisphenolic acid is completely dissolved , heated to 80°C to obtain solution A; under stirring conditions, keep solution A warm for 30 minutes, then pour solution A into hot water at 70°C, wash with hot water repeatedly, and dry in a vacuum oven at 15999Pa and 70°C for 9.5 hours , to obtain bisphenolic acid acetate of white powder;

[0062] ②In the reaction flask equipped with electric stirring, thermometer and vacuum decompression device, add bisphenolic acid acetate prepared in step ①, 11.5g bisphenolic acid, 16g 1,4-cyclohexanedimethanol and 20g p-benzene Diformic acid, mixed evenly, heated to 200°C, and started the decompression device to carry out melt polymeri...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
elongationaaaaaaaaaa
Login to view more

Abstract

The invention discloses an insulation stretch resistant coating, a preparation method and an application thereof. The coating comprises the following components of 15-35 parts of a polyester resin A, 5-25 parts of a polyester resin B, 3.5-5 parts of an amino resin, 0-0.5 part of an adhesion promoter, 0.1-0.2 part of a slip additive, 2.5-4 parts of a surface modification agent, 0.1-0.2 part of an antifoaming agent, 0.1-0.2 part of a flatting agent and 50-55 parts of an organic solvent. The method firstly mixing the polyester resin A, the polyester resin B, the amino resin and the organic solvent, and then adding and evenly mixing the adhesion promoter, the surface modification agent, the slip additive, a catalyst, the antifoaming agent and the flatting agent to obtain the insulation stretch resistant coating. The insulation stretch resistant coating is free from yellowing after the coating is roasted for 3 minutes at the temperature of 270 DEG C and capable of resisting high voltage of 1050V; the appearance of a capacitor paint film which is formed by deep-draw is flawless; the paint film is free from dissolution after-tack when soaked in carbon tetrachloride for 2 hours; and the paint film at the position of a notch of the capacitor is free from peeling off and foaming when the capacitor is cooked at the temperature of 100 DEG C for 30 minutes. Accordingly, the coating is wide in application prospect in electronic products.

Description

technical field [0001] The invention belongs to the technical field of insulating coatings, and in particular relates to an insulating stretch-resistant coating and its preparation method and application. Background technique [0002] In today's society, more and more electronic products appear in people's lives. Electronic products will be used in different environments, which require sufficient resistance to humidity, heat, mildew, salt spray, etc. The impact of humidity on components is particularly obvious, so most electronic components require coating encapsulation. This is a protective measure for insulation and moisture resistance, and it can also prevent mechanical abrasion and beautify the appearance. As one of the devices, the capacitor also has the above requirements. [0003] In recent years, the production of electronic capacitors generally adopts the vacuum impregnation process to coat the coating after the aluminum foil is stamped and formed. However, the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/03C09D167/00C09D161/32C09D7/12C09D5/25C08G63/60
Inventor 冯志德熊华山冀伟强
Owner 清远慧谷新材料技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products