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Hindered amine light stabilizer mass control and/or identification detection method

A quality control method and technology of light stabilizer, which can be used in measurement devices, instruments, scientific instruments, etc.

Inactive Publication Date: 2015-10-21
BEIJING TIANGANG AUX CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although his method has potential application value, it cannot be widely used in plastic products enterprises due to the limitation of instrument conditions
Recently, Reisinger et al. [See: Anal.Chim.Acta 803 (2013) 181-187 reported a method for separating Chimassorb 944 products using traditional reversed-phase chromatography, but the chromatographic conditions are not suitable for oligosaccharides with more than 3 repeating units. Polymers cannot be detected

Method used

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  • Hindered amine light stabilizer mass control and/or identification detection method
  • Hindered amine light stabilizer mass control and/or identification detection method
  • Hindered amine light stabilizer mass control and/or identification detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Chimassorb 944 product quality control testing and identification methods:

[0075] 1. Configuration of the sample solution: Weigh an appropriate amount of Chimassorb 944 product reference substance, put it in a certain amount of solvent (water, methanol, ethanol, acetone, dichloromethane), shake it intermittently, and observe the dissolution within 5 minutes. If there are no visible solute particles, it is considered to be completely dissolved. The experiment found that the Chimassorb 944 product has the best solubility in dichloromethane. Take 1.0g of the Chimassorb 944 product reference substance and place it in a 10mL volumetric flask, dissolve it with dichloromethane to obtain a 100mg / mL sample solution, and pass it through a 0.45m filter membrane use.

[0076] 2. Optimization of HPLC chromatographic analysis conditions:

[0077] 2.1 Selection of UV absorption wavelength

[0078] The UV spectrum data of Chimassorb 944 products are as image 3 As shown, within t...

Embodiment 2

[0090] Testing and identification methods for quality control of Chimassorb 944 products from different sources:

[0091] Get the Chimassorb 944 product that buys in different countries, its experimental procedure is identical with embodiment 1, the result sees Figure 8 . It can be seen from the results that the method established by the present invention provides more details on the composition of the product, and provides more reliable data in the comparison of similar products, which is very suitable for the determination and quality control of Chimassorb 944 products.

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Abstract

The invention discloses a separation and analysis method based on non-aqueous reverse-phase gradient liquid chromatography. Methanol, dichloromethane and triethylamine are taken as mobile phases, a gradient elution mode is adopted, circular and linear oligomers and homologs thereof of a Chimassorb 944 product are separated for the first time, and the molecular weight of the Chimassorb 944 product is identified through MALDI-TOF; by combining with the synthetic route of the Chimassorb 944 product, it is determined that chromatographic peaks of a liquid chromatogram stand for different types of the oligomers with the molecular weights with one constitutional unit deviation and the homologs thereof, attribution is conducted on the peaks, and an effective detection method for the mass control of the Chimassorb 944 product is provided. According to the hindered amine light stabilizer mass control and / or identification detection method, instruments used in the method adopt an ordinary reverse-phase chromatographic system, the operability is strong, and important economic value is achieved by applying the method to the measurement and the product mass control of the Chimassorb 944 product.

Description

technical field [0001] The invention relates to a quality control method for a light stabilizer, in particular to a detection and identification method for product quality control of a hindered amine light stabilizer Chimassorb 944. Background technique [0002] Light stabilizer is an additive that can inhibit or slow down the discoloration or degradation of plastic products caused by light. It can effectively improve the light resistance and oxidation resistance of plastic products and prolong their service life. Chimassorb 944 product is a kind of hindered amine light stabilizer, which has the advantages of low volatility, high thermal stability, good compatibility with resin, and it is not easy to migrate, good anti-extraction, and non-irritating to use , Plastics are easy to form, and are a class of light stabilizers with superior performance. [0003] At present, the detection method to Chimassorb 944 product disclosed in literature mainly contains: the size exclusion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88
Inventor 李靖刘霞杨东升李飞
Owner BEIJING TIANGANG AUX CO LTD
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