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Determination method of benzene solvent content in a kind of solvent type acrylate adhesive

A technology of acrylate and solvent content, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of affecting the detection accuracy of target compounds, affecting volatilization, accuracy and convenience to be improved, etc., to improve detection accuracy, Eliminate influences and avoid quantitatively inaccurate effects

Active Publication Date: 2021-10-22
苏州博莱特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, the correction factor is determined using analytical reagents, and the liquid-gas two-phase equilibrium is in the headspace vial, but when the actual sample of the acrylate adhesive is measured, there is a solid (matrix)-liquid-gas three-phase equilibrium in the headspace vial. The phase partition coefficient balance relationship, the adsorption and encapsulation of the matrix will affect the volatilization of each component in the headspace bottle, and this difference may affect the detection accuracy of trace amounts of target compounds
[0014] Therefore, the accuracy and convenience of the existing adhesive detection methods need to be improved

Method used

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  • Determination method of benzene solvent content in a kind of solvent type acrylate adhesive
  • Determination method of benzene solvent content in a kind of solvent type acrylate adhesive
  • Determination method of benzene solvent content in a kind of solvent type acrylate adhesive

Examples

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Effect test

Embodiment 1

[0065] A method for determining the content of benzene solvents in a solvent-based acrylate adhesive, comprising the following steps:

[0066] a. Preparation of matrix: put an appropriate amount of acrylate adhesive to be tested in a container with a length of 100 mm, a width of 80 mm, and a height of 50 mm (or other suitable container), and the thickness of the tile is about 2 mm. Keep it at ℃ for 2 hours, then raise the temperature to 120℃ and keep it for 2 hours, keep warm and vacuumize for 1 hour, fill it with nitrogen to normal pressure, take it out, put it into a dry storage pre-filled with nitrogen protection, and cool it naturally to room temperature to prepare the matrix;

[0067] b. Preparation of internal standard standard solution: Weigh n-pentane in a 100mL volumetric flask, dilute with ethyl acetate, set the volume to the mark, and prepare 800mg / L internal standard standard solution A. Weigh benzene, Dilute toluene, ethylbenzene and xylene in a 100mL volumetric f...

Embodiment 2

[0077] A method for determining the content of benzene solvents in a solvent-based acrylate adhesive, comprising the following steps:

[0078]a. Preparation of matrix: put an appropriate amount of acrylate adhesive to be tested in a container with a length of 100 mm, a width of 80 mm, and a height of 50 mm (or other suitable container), and the thickness of the tile is about 2 mm. Keep it at ℃ for 2 hours, then raise the temperature to 120℃ and keep it for 2 hours, keep warm and vacuumize for 1 hour, fill it with nitrogen to normal pressure, take it out, put it into a dry storage pre-filled with nitrogen protection, and cool it naturally to room temperature to prepare the matrix;

[0079] b. Preparation of internal standard standard solution: Weigh n-pentane in a 100mL volumetric flask, dilute with ethyl acetate, set the volume to the mark, and configure internal standard solution A of 1200mg / L. Weigh benzene, Dilute toluene, ethylbenzene, and xylene in a 100mL volumetric flas...

Embodiment 3

[0089] A method for determining the content of benzene solvents in a solvent-based acrylate adhesive, comprising the following steps:

[0090] a. Preparation of matrix: put an appropriate amount of acrylate adhesive to be tested in a container with a length of 100 mm, a width of 80 mm, and a height of 50 mm (or other suitable container), and the thickness of the tile is about 2 mm. Keep it at ℃ for 3 hours, then raise the temperature to 115℃ and keep it for 3 hours, keep warm and vacuumize for 1 hour, fill it with nitrogen to normal pressure, take it out, put it into a dry storage pre-filled with nitrogen protection, and cool it naturally to room temperature to prepare the matrix;

[0091] b. Preparation of internal standard standard solution: Weigh n-pentane in a 100mL volumetric flask, dilute with ethyl acetate, set the volume to the mark, and configure internal standard solution A of 1000 mg / L. Weigh benzene, Dilute toluene, ethylbenzene and xylene in a 100mL volumetric fla...

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Abstract

The invention discloses a method for measuring the content of benzene solvents in a solvent-type acrylate adhesive, which comprises the following steps: (a) preparing a matrix; (b) preparing an internal standard solution; (c) preparing a sample to be tested; (d) Blank test; (e) Determination of relative correction factor; (f) Determination of the sample to be tested, and calculate the content of benzene, toluene, ethylbenzene+xylene in the acrylate adhesive to be tested. The present invention adopts matrix-corrected headspace-gas chromatography to detect and analyze solvent-based acrylate adhesive products, uses the sample obtained after drying the actual sample to be tested as the matrix, and adds the matrix to the blank experiment and the relative correction factor In the measurement experiment, the influence of the matrix is ​​eliminated, and the detection accuracy is improved; the lower limit of the quantitative determination of benzene, toluene, ethylbenzene + xylene in the solvent-based acrylate adhesive meets the requirements of daily quantitative analysis, which is better than the traditional instrument It is more realistic to set 10 times of the signal-to-noise ratio as the lower limit of quantification.

Description

technical field [0001] The invention belongs to a method for measuring solvent content, in particular to a method for measuring the content of benzene solvents in solvent-type acrylate adhesives. Background technique [0002] Solvent-based acrylic adhesives are widely used in the bonding of plastics, paper, wood, metal, leather, textiles and other materials, and are widely used in food and pharmaceutical packaging, furniture, mechanical equipment, aviation, transportation and other fields . [0003] Benzene solvents are carcinogenic, highly toxic, and seriously endanger human health. The environmental protection standard "HJ2539-2014 Environmental Labeling Product Technical Requirements Printing Part III: Gravure Printing" stipulates that benzene solvents are not allowed to be used in adhesives and other products, but it cannot be completely avoided that benzene solvents are brought into the glue as impurities of other raw materials. Adhesives and related products. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/16G01N30/06
CPCG01N30/06G01N30/16G01N30/88G01N2030/025G01N2030/045G01N2030/884
Inventor 关琳琳易晓洪岳月李光明
Owner 苏州博莱特新材料有限公司
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