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Method for measuring solid amines catalyst for roof liner of automobile

A determination method and catalyst technology, applied in the field of quantitative analysis, can solve the problems of long time required, complicated detection operation of liquid chromatography equipment, and inability to obtain results quickly, and achieve simple operation, short analysis time, and good reproducibility. Effect

Inactive Publication Date: 2009-02-04
WUXI GISSING AUTO PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Industrial production requires on-site control of the catalyst. It is necessary to ensure that the content of the catalyst is within a stable range in order to ensure stable production of the product. If high-end liquid chromatography equipment is used to test on-site testing, there is a lack of maintenance and use of liquid chromatography equipment. At the same time, the detection operation of liquid chromatography equipment is complicated, it takes a long time, and the results cannot be obtained quickly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1, the concentration test of low concentration solid amine

[0054] 1. Use an electronic balance to accurately weigh solidamine, and prepare five solutions with mass percent concentrations of 4.25%, 5.25%, 6.25%, 7.25%, and 8.25%.

[0055] 2. Determination of the concentration of solid amine catalysts: accurately weigh M 待测 Catalyst sample (accurate to 0.001g, weighed M 待测 Control it at about 5g) into the Erlenmeyer flask; use deionized water to dilute it to about 70mL; add 3-4 drops of 0.1% phenolphthalein indicator, the color of the sample changes from colorless and transparent to purple; use calibrated hydrochloric acid The solution is titrated to the sample until it is colorless, and the volume V of the hydrochloric acid standard solution used is recorded;

[0056] According to empirical formula: V HCl =(C 均 ×V) / 0.1157, get the corresponding V HCl .

[0057] 3. Data processing: through the application software origin to process the above operations ...

Embodiment 2

[0064] Embodiment 2, the concentration test of middle concentration solid amine

[0065] 1. Use an electronic balance to accurately weigh solidamine, and prepare five solutions with mass percent concentrations of 12%, 13%, 14%, 15%, and 16%.

[0066] 2. Determination of the concentration of solid amine catalysts: accurately weigh M 待测 Catalyst sample (accurate to 0.001g, weighed M 待测 Control it at about 2g) into the Erlenmeyer flask; use deionized water to dilute it to about 70mL; add 3 to 4 drops of 0.1% phenolphthalein indicator, and the color of the sample changes from colorless and transparent to purple; use calibrated hydrochloric acid The solution is titrated to the sample until it is colorless, and the volume V of the hydrochloric acid standard solution used is recorded;

[0067] According to empirical formula: V HCl =(C 均 ×V) / 0.1157, get the corresponding V HCl .

[0068] 3. Data processing: through the application software origin to process the above operations ...

Embodiment 3

[0076] Embodiment 3, the concentration test of high concentration solid amine

[0077] 1. Use an electronic balance to accurately weigh solidamine, and prepare five solutions with mass percent concentrations of 25%, 27%, 29%, 31%, and 33%.

[0078] 2. Determination of the concentration of solid amine catalysts: accurately weigh M 待测 Catalyst sample (accurate to 0.001g, weighed M 待测 control at about 2g) into the Erlenmeyer flask; use deionized water to dilute it to about 70ml; drop 3 to 4 drops of 0.1% phenolphthalein indicator, and the color of the sample changes from colorless and transparent to purple; use calibrated hydrochloric acid The solution is titrated to the sample until it is colorless, and the volume V of the hydrochloric acid standard solution used is recorded;

[0079] According to empirical formula: V HCl =(C 均 ×V) / 0.1157, get the corresponding V HCl .

[0080] 3. Data processing: through the application software origin to process the above operations to o...

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PUM

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Abstract

The present invention relates to a determination method of solid amine catalyst which is used in the top linear of a vehicle, belonging to the technical field of quantitative analysis. The method adopts principles of the color changing of acidic indicators and the acid-alkali neutralization, so as to accurately determine the concentration of the solid amine catalyst in the solution, and comprises the following steps: firstly, hydrochloric acid solution and bromocresol green-methyl red are prepared, and the hydrochloric acid solution is calibrated; secondly, the hydrochloric acid solution is used for calibrating the concentration of the catalyst used on the site, and the color changing of the selected phenolphthalein indicator and the used amount of the standard hydrochloric acid solution are applied to calculate the actual concentration of the catalyst used on the site; thirdly, the actual determination results are applied to judge whether the solid amine catalyst satisfies the production requirements; if the solid amine catalyst does not satisfy the production requirements, the concentration of the catalyst is readjusted so that the solid amine catalyst satisfies the production requirements. The method has the advantages of simple operation, stable testing results and short testing time. Simultaneously, the testing equipment is simple and easy to purchase. And the method is suitable for wide application in the internal decorating industry of vehicles.

Description

technical field [0001] The invention relates to a method for determining a solid amine catalyst for an automobile roof lining, in particular to testing the stability of a catalyst in the glue-spraying link in the automobile interior manufacturing industry by means of a chemical analysis method, and belongs to the technical field of quantitative analysis. Background technique [0002] With the rapid development of automobile manufacturing in China, the development of parts and components has also increased in scale. At present, the production process adopted by most domestic automotive roof lining manufacturers is the dry process, which is simply to use composite materials and fabrics for composite pressing to produce the roof lining. This method has many defects such as high raw material cost and poor acoustic performance of finished parts. , in the current situation of increasingly fierce competition in the automobile industry, it is bound to become a development trend to a...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 刘明春
Owner WUXI GISSING AUTO PARTS CO LTD