Polyvinylidene fluoride coating and preparation method thereof

A technology of polyvinylidene fluoride and coating, applied in the direction of coating, etc., can solve problems such as interface desorption, insufficient wettability of fillers, coating damage, etc., achieve good durability and heat insulation effect, ensure application stability, The effect of good cohesive strength

Inactive Publication Date: 2020-04-24
中昊北方涂料工业研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal insulation functional fillers used in the above studies include carbon nanotubes, titanium dioxide, ceramic microspheres, closed-cell perlite, etc. Although some of them have certain thermal insulation effects, a large amount of thermal insulation functional fillers are required to be added to the thermal insulation coating. , and the density of these insulating functional fillers is low, resulting in a large microscopic interface area between the filler and the resin, and due to its chemical structure characteristics, the surface energy of the polyvinylidene fluoride resin is low, the wettability of the filler is insufficient, and the interface is prone to detachment. damage to the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Pre-treat the filler before configuring the polyvinylidene fluoride coating: take 3g hollow glass beads, 5g hollow ceramic beads, and 3g aluminum silicate fibers; select zinc acetate as the surface treatment catalyst, and the amount is 0.08g; select 3-methacryloyl Oxypropyltrimethoxysilane is the surface treatment agent, and the amount is 0.8g; ethanol is selected as the solvent, and the amount is 110g.

[0023] Treatment of packing: add hollow glass beads, hollow ceramic beads, aluminum silicate fiber, ethanol, and zinc acetate into the reaction vessel, heat to 55°C, add 3-methacryloxypropyltrimethoxysilane dropwise, Adding time is 40 minutes; after dripping, keep at 55°C for 2 hours, discharge the material and filter, and evaporate and dry the filtered filler under forced convection conditions.

[0024] Then take 16 g of polyvinylidene fluoride resin (melting point 165°C) and 6.9 g of polyacrylate resin with a molecular weight of 2500; the selected solvent is: a mixed solu...

Embodiment 2

[0026] Pre-treat the filler before configuring the polyvinylidene fluoride coating: take 12g of hollow glass beads and 1g of mica powder; select sodium ethoxide as the surface treatment catalyst, with an amount of 0.02g; select 3-methacryloxypropyl triethoxy Silane is the surface treatment agent, the dosage is 0.5g; ethyl acetate is selected as the solvent, the dosage is 100g;

[0027] Add hollow glass beads, mica powder, sodium ethoxide, and ethyl acetate into the reaction vessel, heat to 55°C, and add 3-methacryloxypropyltriethoxysilane dropwise for 30 minutes; After the completion of heat preservation at 40°C for 3 hours, the material is discharged and filtered, and the filtered filler is evaporated and dried under forced convection conditions.

[0028] Then take 17g of polyvinylidene fluoride resin (melting point of 165℃) and 7.5g of polyacrylate resin with molecular weight of 4000; select solvents: 10g of methyl isobutyl ketone, 33g of N methylpyrrolidone, and 20g of dimethylf...

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PUM

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Abstract

The invention relates to the field of coatings, and in particular, relates to a polyvinylidene fluoride coating and a preparation method thereof. The coating composition at least comprises, by mass, 10-20% of polyvinylidene fluoride, 5-25% of a filler, 1-8% of polyacrylate resin, and 47-76% of a solvent. The preparation method of the polyvinylidene fluoride coating comprises the steps: adding polyvinylidene fluoride, the filler subjected to surface treatment, polyacrylate resin and the solvent into a proportioning container, carrying out primary uniform mixing, and preparing coating dispersionslurry in a high-speed dispersion mode at a dispersion rate of 500-4500 rpm for 30-90 minutes.

Description

Technical field [0001] The invention relates to the field of coatings, in particular to a polyvinylidene fluoride coating and a preparation method thereof. Background technique [0002] Polyvinylidene fluoride resin (PVDF) is an addition polymer of vinylidene fluoride. It is a high-molecular-weight, semi-crystalline fluoropolymer. It has good solvent solubility and dispersibility, and its sintering and curing temperature is also relatively high. Low, because organic fluoropolymer has excellent properties such as weather resistance, durability, chemical resistance and corrosion resistance, wear resistance, insulation, non-adhesion and pollution resistance, it is made of low thermal conductivity particle filler or fiber and resin matrix composite Thermal insulation coating has the advantages of easy molding, light weight, and good thermal insulation effect. It can be used in applications requiring thermal insulation, such as vehicles, machinery, and pipelines. The patent number i...

Claims

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Application Information

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IPC IPC(8): C09D127/16C09D133/04C09D7/62
CPCC09D127/16C09D7/62C09D7/70C08L33/04C08K9/06C08K9/04C08K7/28C08K7/24C08K7/10C08K3/34
Inventor 李博文谈珍胡进奔吴津成
Owner 中昊北方涂料工业研究设计院有限公司
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