Infared peak area ratio determination method of content of PVDF resin in fluorocarbon color coated sheet coating

A resin content, color-coated board technology, applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problems of large application limitations, complicated separation process, large consumption of chemical reagents, etc., and achieve applicability Improvement, strong practicability, and the effect of saving test time

Inactive Publication Date: 2010-06-23
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The other is infrared spectroscopy, which is determined by quantitatively measuring the infrared characteristic peak area of ​​PVDF. However, due to the influence of pigments and filler components in the coating, each PVDF coating formulation must have its own correlation coefficient to determine the results. Correction, so in the case of unknown paint formulation, the application of this method has great limitations
[0005] Among the above two methods, one needs to use various solvents to separate the PVDF resin for measurement. The separation process is more complicated and cumbersome, requires a large amount of chemical reagents, and takes a long time; the other is subject to the coating formulation. The limitation of the application is relatively large, and it cannot give accurate results for coatings with unknown formulas.

Method used

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  • Infared peak area ratio determination method of content of PVDF resin in fluorocarbon color coated sheet coating
  • Infared peak area ratio determination method of content of PVDF resin in fluorocarbon color coated sheet coating

Examples

Experimental program
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Embodiment 1

[0033] Embodiment one: a kind of assay method of PVDF resin content of fluorocarbon color-coated plate, its specific operation steps are as follows:

[0034] 1. Reagents and instruments

[0035] PVDF resin (commercially available, solid content is 100%), acrylic resin (commercially available, solid content is 40%), organic solvent (acetone, analytically pure) infrared spectrometer, sample preparation wire rod, stirrer, baking oven

[0036] 2. Sample processing

[0037] Cut the sample into a suitable size for infrared spectrometer measurement.

[0038] 3. Preparation of standard working curve

[0039] 1. Preparation of standard samples

[0040]Standard samples were prepared according to the solid content percentages of PVDF resin (solid powder) and acrylic resin (liquid) being 2:8, 4:6, 5:5, 6:4 and 8:2, respectively. When preparing the standard sample, add acetone to adjust the viscosity while fully stirring, so that the viscosity of the sample is suitable for coating. Th...

Embodiment 2

[0052] Embodiment two: a kind of assay method of PVDF resin content of fluorocarbon coil coating, its specific operation steps are as follows:

[0053] 1. Reagents and instruments

[0054] PVDF resin (commercially available, solid content is 100%), acrylic resin (commercially available, solid content is 40%), organic solvent (acetone, analytically pure) infrared spectrometer, sample preparation wire rod, stirrer, baking oven

[0055] 2. Sample processing

[0056] The sample is scraped onto the steel plate by the wire rod method to make a color-coated plate sample, and the coating thickness is controlled at 18 or 20 microns. Then cut into a suitable size for infrared spectrometer measurement

[0057] 3. Preparation of standard working curve

[0058] 1. Preparation of standard samples

[0059] Standard samples were prepared according to the solid content percentages of PVDF resin (solid powder) and acrylic resin (liquid) being 4:6, 5:5, 6:4, 8:2 and 9:1, respectively. When ...

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Abstract

The invention relates to an infared peak area ratio determination method of the content of PVDF resin in a fluorocarbon color coated sheet coating, comprising the following steps: 1. preparing a series of fluorocarbon coil coatings with known PVDF resin content; 2. scraping the fluorocarbon coil coatings prepared in step 1 on a steel plate by a coil bar method to obtain color coated sheet samples, and drying the samples; 3. directly collecting infrared spectrum charts for the series samples produced in step 2 on an infrared spectrometer by an ART sampling method; 4. calculating the peak area A of 1696-1764cm-1 and 860-900cm-1 of each sample and the ratio of the two peak area, and taking the peak area ratio of each sample and PVDF resin content / acrylic resin content as a horizontal coordinate and a vertical coordinate to obtain a standard working curve; and 5. collecting the infrared spectrum chart of the fluorocarbon color coated sheet to be detected, calculating the peak area ratio of the sample and calculating on the working curve to obtain the PVDF resin content of the sample. The method leaves out the pretreatment step of the sample, and does not need to use organic solvent, thus achieving the purposes of green analysis and rapid detection.

Description

technical field [0001] The invention relates to the determination of the content of PVDF resin in the coating of fluorocarbon color-coated plates, in particular to a method for measuring the content of PVDF resin in the coating of fluorocarbon color-coated plates by using an infrared spectrometer. Background technique [0002] Fluorocarbon color-coated board refers to the color-coated board whose main resin component is polyvinylidene fluoride (PVDF). Due to its excellent weather resistance, UV degradation resistance, good wear resistance, moisture resistance and antibacterial properties, this color-coated board, as a high-end color-coated board product, has gained more and more attention in the construction color-coated board industry. more and more widely used. The domestic coating industry stipulates in "HG / T 3793-2205 Hot-melt Fluorine Resin (PVDF) Coatings" that the PVDF content in the coating resin must be ≥ 70%. In order to meet the requirements for coating durabili...

Claims

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Application Information

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IPC IPC(8): G01N21/17
Inventor 范纯施振岩姜宝宇吉华东
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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