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Modification method of nano material for high-viscosity coating, and preparation method and application of corona-resistant composite coating

A nanomaterial and composite coating technology, applied in coatings, circuits, electrical components, etc., can solve the problems of poor compatibility of the main polymer of the coating, weak stability, and weakened corona resistance effect.

Inactive Publication Date: 2020-10-23
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the above deficiencies in the prior art, the present invention aims to provide a method for modifying nano-materials in high-viscosity coatings, so as to solve the problem of poor dispersion of nano-materials in high-viscosity coatings, weak stability, and the main body of the coating. The problem of poor compatibility of polymers and the weakening of corona resistance after adding nanomaterials

Method used

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  • Modification method of nano material for high-viscosity coating, and preparation method and application of corona-resistant composite coating
  • Modification method of nano material for high-viscosity coating, and preparation method and application of corona-resistant composite coating
  • Modification method of nano material for high-viscosity coating, and preparation method and application of corona-resistant composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 A nanomaterial modification method for high-viscosity coatings

[0039]1. Weigh 20 mol of phenol and 10 mol of 50nm silica, add them to 100 mol of xylene respectively, heat up to 30°C, keep warm and activate for 24 hours to obtain material A1;

[0040] 2. Weigh 10 mol of material A1 and add it to 200 mol of octene, heat to 80 °C under the pressure of 0.5 Mpa and nitrogen protection, and keep warm for grafting reaction for 1 h to obtain material B1;

[0041] 3. Weigh 100 mol of material B1, wherein, in order to disperse material B1 evenly, divide material B1 into 5~8 parts, add them to 500 mol of toluene respectively, continue to add 10 mol of KH550, under the protection of argon, heat up To 20 ℃, insulation modification for 48h, the modified nanomaterials are obtained.

Embodiment 2~8

[0042] Embodiment 2~8 are used for the modification method of the nanometer material of high-viscosity coating

[0043] The operation steps of Examples 2-8 are the same as those of Example 1, and the only difference is that the raw materials used and the amount of raw materials are different. The relevant raw materials and the amount of raw materials are shown in Table 1.

[0044] Table 1

[0045]

[0046]

Embodiment 9~13

[0047] Embodiment 9~13 are used for the modification method of the nanometer material of high-viscosity coating

[0048] Examples 9-13 are the same as those in Example 1 with the same raw materials, raw material consumption and operation steps, the only difference is that the relevant parameters in the operation steps are different, and the relevant parameter data are shown in Table 2.

[0049] Table 2

[0050]

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Abstract

The invention discloses a modification method of a nano material for a high-viscosity coating, and a preparation method and application of a corona-resistant composite coating. The modification methodof the nano material for the high-viscosity coating comprises the steps of activation, grafting and silane coupling modification which are carried out in sequence. The preparation method of the corona-resistant composite coating comprises the step of mixing the modified nano material with a corona-resistant coating to obtain the corona-resistant composite coating which is applied to the coating of corona-resistant enameled wires. The nano material modified by the method is uniformly dispersed in a high-viscosity coating system, does not settle and has high stability. The invention belongs tothe field of high polymer materials. The nano material is suitable for the corona-resistant composite coating, and the corona-resistant composite coating is used for coating the corona-resistant enameled wires, and can prolong corona-resistant time by more than 80 hours. The modified nano material has good compatibility with the corona-resistant composite coating, and does not influence the performance of the main body polymer of the corona-resistant composite coating.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for modifying nanometer materials used in high-viscosity coatings, a preparation method and application of corona-resistant composite coatings. Background technique [0002] Nanomaterials have the characteristics of small particle size, large specific surface area, high surface energy, and large proportion of surface atoms, as well as special properties such as surface and interface effects, small size effects, quantum size effects, and macroscopic quantum tunneling effects. Combining nanomaterials and polymers can improve the mechanical strength, aging resistance, corrosion resistance, corona resistance and UV resistance of polymer materials. However, because the surface of commonly used nanomaterials contains a large number of hydroxyl groups, it is easy to absorb moisture and agglomerate, which seriously affects its flow and dispersion properties. Therefore, modifyin...

Claims

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Application Information

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IPC IPC(8): C09D179/08C09D5/25
CPCC08K2003/2227C08K2003/2241C09D179/08H01B3/308C08K13/06C08K9/04C08K9/06C08K3/36C08K3/22
Inventor 周剑林曾荣今陈述陈建张培盛
Owner HUNAN UNIV OF SCI & TECH
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