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Preparation method of standard sample for testing phthalic ester plasticizer

A technology of ester plasticizer and phthalic acid, which is applied in the field of standard sample preparation, can solve the problems of large differences and lack of test results, achieve strong operability, improve comparability and consistency

Inactive Publication Date: 2012-02-08
INSPECTION & QUARANTINE TECH CENT OF FUJIAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the 2009 Certification and Accreditation Administration (full name: China National Certification and Accreditation Administration Commission) "Determination of Phthalate Plasticizers in Plastics" proficiency verification project undertaken by the applicant, the results of many laboratory tests are quite different. Large, after in-depth investigation and analysis, the lack of standard samples of phthalate plasticizers in plastics for testing process quality monitoring is an important factor

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0012] The preparation method of standard sample for phthalate plasticizer measurement of the present invention specifically comprises the following steps: (1) the raw and auxiliary materials of standard sample are made of target compound phthalate plasticizer, stabilizer, lubricant According to the requirements of the standard sample, take an appropriate amount of the target compound phthalate plasticizer, stabilizer, and lubricant, and mix the three evenly to form a mixture, and the stabilizer accounts for the total amount of raw and auxiliary materials in the standard sample. 1% to 2% of the weight, lubricants account for 2% to 3% of the total weight of the raw and auxiliary materials of the standard sample; (2) take the base material and the above-mentioned mixture, and put the two into a high-speed stirrer for stirring, Set at 2400 rpm, stop stirring when the temperature in the mixer rises to 110°C to 120°C and cool to below 45°C; (3) Extrude and blow the mixture obtained ...

Embodiment 1

[0015] Prepare standard samples whose contents of DEHP, DBP, and DNOP account for 0.19%, 0.12%, and 0.25% of the total weight of the raw and auxiliary materials of the standard sample respectively:

[0016] When the total weight of the raw and auxiliary materials of the standard sample is about 174kg, weigh 330.6g DEHP, 208.8g DBP, 435gDNOP, 1.74kg organotin and 3.48kg lubricant respectively, and mix the three evenly, and put the above mixture into the high-speed mixer first During the process, start the high-speed stirrer, then drop about 165kg of polyvinyl chloride (PVC) powder from the top of the stirrer, continue stirring, and set the speed at 2400 rpm; stop stirring when the temperature in the stirrer rises to 110°C and cooled to below 45°C; the mixture obtained after stirring and cooling is extruded and blown by a film blowing machine. Obtain a film with a film thickness of 28 μm, then discard the front 1 / 5 and rear 1 / 5 of the film, leaving only the middle part of the fi...

Embodiment 2

[0018] Prepare standard samples whose contents of DEHP, DBP, and DNOP account for 0.28%, 0.25%, and 0.20% of the total weight of the raw and auxiliary materials of the standard sample:

[0019] When the total weight of the raw and auxiliary materials of the standard sample is about 174kg, weigh 487.2g DEHP, 435g DBP, 348gDNOP, 2.61kg organotin and 4.35kg lubricant respectively, and mix the three evenly, and put the above mixture into the high-speed mixer first , start the high-speed stirrer, drop about 165kg polyvinyl chloride (PVC) powder from the top of the high-speed stirrer, continue to stir, and the rotating speed is set at 2400 rpm; when the temperature in the stirrer rises to 120°C, stop stirring and Cool to below 45°C; the mixture obtained after stirring and cooling is extruded and blown by a film blowing machine. For a film with a film thickness of 30 μm, then discard the front 1 / 5 and rear 1 / 5 of the film, leaving only the middle part of the film, and then roll the m...

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Abstract

The invention provides a preparation method of a standard sample for testing a phthalic ester plasticizer. The preparation method comprises the following steps of: uniformly mixing a phthalic ester plasticizer serving as a target compound with a stabilizer, a lubricant and the like to form a mixture; stirring the mixture and a substrate material at a high speed; stirring, cooling, extruding and blowing to obtain a film of which the thickness is 25-30 mum; and performing serial processing on the film to obtain the standard sample. The invention has the advantages: the standard sample for testing the phthalic ester plasticizer is obtained with the preparation method which is easy and convenient to operate, the comparability and consistence of detection data of the phthalic ester plasticizer in plastic among laboratories are improved, and a basis for uniformly testing the standard of the phthalic ester plasticizer in plastic is laid.

Description

【Technical field】 [0001] The invention relates to a method for preparing a standard sample, in particular to a method for preparing a standard sample for measuring phthalate plasticizers. 【Background technique】 [0002] Phthalate plasticizers are mainly used to improve the processing performance and strength of plastics, and are widely used in the production of plastics and rubber materials. Phthalate plasticizers and plastic molecules are connected by hydrogen bonds and van der Waals forces, and they retain their relatively independent chemical properties, so phthalate plasticizers are easy to migrate from plastics to the environment. Scientific research has found that compounds such as phthalate plasticizers can interfere with human endocrine and damage reproduction and development. The European Union, the United States, Japan and other countries have enacted regulations to limit the use of such substances in food contact materials, toys and children's products. Use, such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/02C08K5/12B29C55/28G01N1/28
Inventor 吕水源唐熙李小晶石坚许才明唐泓梁鸣
Owner INSPECTION & QUARANTINE TECH CENT OF FUJIAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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