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A method for measuring the content of volatile organic compounds in paint film

A volatile organic compound, paint and paint technology, applied in the field of detection, can solve the problems of complex operation, high cost, impact on human health, etc., and achieve the effect of simple processing process, high sensitivity, and elimination of interference

Active Publication Date: 2019-03-05
HUIZHOU CHANGRUNFA PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is that after the paint is applied to the surface of the material, the organic solvent in the paint will gradually volatilize and emit volatile organic compounds (VOC) into the atmosphere, resulting in a decrease in the quality of the surrounding air, which in turn affects human health
Second, the coating consumes a lot of non-renewable resources in the production process, such as: coal and oil
[0006] At present, domestic and foreign paint industries basically adopt the method of measuring VOC in liquid paint products, but the method and standard for measuring volatile organic compounds emitted into the air after the paint film is formed have not yet been established. The content method is generally using the environmental test chamber method, and the collected air samples containing VOC need to be injected into the adsorption tube containing the adsorbent and then measured by a gas chromatograph. The operation of the sample collection process is complicated and costly, and the substrate cannot be excluded Influence of Medium Volatile Organic Compounds on the Content of Organic Compounds in Paint Films

Method used

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  • A method for measuring the content of volatile organic compounds in paint film
  • A method for measuring the content of volatile organic compounds in paint film
  • A method for measuring the content of volatile organic compounds in paint film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] In the measurement method of this embodiment: the components in a PU coating are mixed and sprayed evenly on the tin foil paper according to the regulations in the correct mass ratio, and the specifications are taken from the tin foil paper 24h, 48h, 72h, and 7 days after spraying. Weigh a 1cm×4cm paint film and place it in a 20mL headspace bottle, quickly add 10μL of methanol, and immediately seal the headspace bottle. The headspace equilibrium temperature for samples and standards is 90°C for 10min. Table 4 shows.

[0058] Table 4 The test results of the content of volatile organic compounds in the paint film after the same paint film is placed for different times

[0059]

[0060] Note: N.D. means that the target compound was not detected

Embodiment 2

[0062] In the assay method of the present embodiment: select the same curing agent and thinner, different PU paint main agents as in Example 1, prepare paint in the same way, spray under the same conditions, from 24h, 48h, 72h after spraying , 7 days respectively, take a paint film with a size of 1cm×4cm from the tinfoil paper and weigh it and place it in a 20mL headspace bottle, quickly add 10μL of methanol, seal the headspace bottle immediately, and balance the temperature of the headspace of the sample and standard sample at 90°C for 10 minutes, and the measured results are shown in Table 5.

[0063] Table 5 The test results of the content of volatile organic compounds in the paint film after the same paint film is placed for different times

[0064]

[0065] Note: N.D. represents the target compound not detected

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Abstract

In the detection of the volatile organic compound content in the coating material in the prior art, the volatile organic compound content in the film-forming material cannot be directly measured, the interference of the substrate on the volatile organic compound content in the paint film cannot be eliminated, and other disadvantages exist. A purpose of the present invention is to solve the problems in the prior art. According to the present invention, the components and the content of the volatile organic compound in a coating material paint film are determined by directly carrying out sampling analysis on the coating material paint film, and the simple, rapid and accurate detection method for the volatile organic compound in the coating material paint film is established; and the determination method has characteristics of simple pretreatment process, low cost and high determination sensitivity, can directly take the dried paint film and perform the detection at any time, can provide the method and the scientific basis for the detection of the volatile solvent content in the coating material paint film, can eliminate the interference of the volatile organic matter in the coating material substrate, and can be used for easily judging the specific volatile organic compound absence time of the paint film after the construction of the coating material.

Description

technical field [0001] The invention belongs to the technical field of detection, in particular to a method for detecting the content of volatile organic compounds in paint films. Background technique [0002] Coating is a kind of important engineering material that is matched with various departments of national economy and national defense industry. , heat-resistant, etc.) a class of liquid or solid materials. [0003] Coating is exactly " paint " known by people usually, and this kind of coating is all organic coating, and the synthetic resin coating that develops on this basis is still organic coating. Most organic coatings use some raw materials that are harmful to the human body and the environment during the production process, and also emit harmful waste water and gases during the production process, and even release harmful gases for a period of time after construction. Most organic coatings are flammable and prone to degradation when exposed to the natural enviro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/06G01N30/60G01N30/86
CPCG01N30/06G01N30/6052G01N30/8634
Inventor 郑建鹏尉微艾建连吴金梅李晓雷
Owner HUIZHOU CHANGRUNFA PAINT