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A kind of rapid detection method of n-butyl acetate quality for paint production

A technology of n-butyl acetate and detection method, which is applied in chemical analysis by titration method, measuring device, material weighing, etc. It can solve the problem of whitening and yellowing of products, whitening and turbidity, increase of acid value of n-butyl acetate, etc. problem, to achieve the effect of fast detection speed, simple operation and wide applicability

Active Publication Date: 2022-05-13
JINJIANG TAIXING CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the quality of the raw material n-butyl acetate is not good, when calcium isooctanoate is added later as a drier of paint and an accelerator of unsaturated polyester resin, the quality problem of whitening and yellowing of the product will occur, which will occur in the production of paint. Using calcium isooctanoate, calcium isooctanoate will easily react with other substances, resulting in whitening and yellowing of the paint. Experiments have found that the acid value in n-butyl acetate increases, and whitening will occur during normal paint use. The phenomenon of yellowing, after adding a certain amount of acetic acid to n-butyl acetate, it will appear white and turbid after mixing and dissolving with calcium isooctanoate
There are many reasons for the product to turn white and yellow, such as the acid value range of n-butyl acetate does not meet the requirements, some ions react with calcium isooctanoate and other factors, but these items cannot be tested one by one in actual production , otherwise time-consuming and labor-intensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of quick detection method of n-butyl acetate quality for paint production, comprises the following steps:

[0015] S1. In a balance with an accuracy of 0.01g, use a 250mL Erlenmeyer flask to weigh 0.2±0.02g of calcium isooctanoate liquid (analytically pure), and reset the balance to zero;

[0016] S2. Use a pipette to pipette the n-butyl acetate to be detected and slowly add it dropwise to the conical flask. At the same time, shake the conical flask slowly to dissolve calcium isooctanoate in the n-butyl acetate to be detected, and observe the appearance of the mixed liquid change, stop adding the n-butyl acetate to be detected when the mixed liquid appears white turbid, and weigh and record the amount of n-butyl acetate to be detected;

[0017] S3, quality judgment, if the addition of n-butyl acetate to be detected is less than 20g, then the n-butyl acetate quality test is judged as unqualified, if the addition of n-butyl acetate to be detected is at 20-100g, the...

Embodiment 2

[0019] Take a bottle of n-butyl acetate raw material for quality inspection. The inspection method is: in a balance with an accuracy of 0.01g, weigh 0.2±0.02g of calcium isooctanoate liquid (analytical pure) in a 250mL conical flask, and reset the balance to zero; Use a pipette to pipette the n-butyl acetate to be detected and slowly add it dropwise to the conical flask, while slowly shaking the conical flask to dissolve calcium isooctanoate in the n-butyl acetate to be detected, and observe the appearance change of the mixed liquid, When the added amount of n-butyl acetate to be detected is 150g (greater than 100g), the color of the mixed solution remains unchanged, and the quality test of this bottle of n-butyl acetate is judged as superior.

Embodiment 3

[0021] The n-butyl acetate in Example 2 was taken, and acetic acid was added dropwise to make the mass content of acetic acid reach 0.1%, which was used as the sample to be tested for quality detection. The detection method is: in a balance with an accuracy of 0.01g, weigh 0.2±0.02g calcium isooctanoate liquid (analytical pure) with a 250mL triangular flask, and reset the balance to zero; use a pipette to take the sample to be tested and slowly Add it dropwise into the Erlenmeyer flask, while slowly shaking the Erlenmeyer flask to dissolve the calcium isooctanoate in the sample to be tested, observe the appearance change of the mixed liquid, stop adding the sample to be tested when the mixed liquid appears white turbid, and weigh the volume of the sample to be tested. The addition amount is 19g, and the quality test of this sample to be tested is judged as unqualified.

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PUM

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Abstract

The invention provides a rapid detection method for the quality of n-butyl acetate used in paint production, which belongs to the technical field of raw material detection and comprises the following steps: weighing 0.2 ± 0.02 g calcium isooctanoate liquid with a triangular flask in a balance; Take the n-butyl acetate to be detected and slowly add it dropwise into the conical flask, and at the same time shake the conical flask slowly to dissolve the calcium isooctanoate in the n-butyl acetate to be detected, observe the appearance change of the mixed liquid, when the mixed liquid appears white Stop adding n-butyl acetate to be detected when it is turbid, and weigh and record the amount of n-butyl acetate to be detected; if the amount of n-butyl acetate to be detected is less than 20g, it is judged as unqualified, If the addition amount of butyl ester is 20‑100g, it is judged as qualified, and if the addition amount of n-butyl acetate to be detected is greater than 100g, it is judged as superior grade. The invention has the advantages of simple operation, low cost and fast detection speed.

Description

technical field [0001] The invention belongs to the technical field of raw material detection, and in particular relates to a rapid detection method for the quality of n-butyl acetate used in paint production. Background technique [0002] N-butyl acetate, referred to as butyl acetate. Colorless transparent liquid with pleasant fruity smell. The lower homologues are difficult to dissolve in water; miscible with alcohol, ether, ketone and other organic solvents, it is an excellent organic solvent, widely used in paint, curing agent, polyester resin and other industries. Calcium isooctanoate is light yellow transparent liquid, soluble in ether, slightly soluble in ethanol, with stable acid value, stable molecular weight, light color, good drying effect, mainly used as drier of paint and unsaturated polyester resin accelerators. When the quality of the raw material n-butyl acetate is not good, when calcium isooctanoate is added later as a drier of paint and an accelerator of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/00G01N31/16
CPCG01N5/00G01N31/16
Inventor 潘书铭李成富
Owner JINJIANG TAIXING CHEM IND CO LTD