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Novel lanthanum cyanurate composite PVC (polyvinyl chloride) heat stabilizer

A composite heat stabilizer, lanthanum cyanurate technology, applied in the field of PVC rare earth heat stabilizer preparation, can solve the problems of high toxicity, weak effect, high cost, etc., and achieve the effect of good discoloration and excellent thermal stability

Inactive Publication Date: 2013-12-11
TIANJIN DAOJUN PACKAGING PROD SALES
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the world's largest output is still traditional lead salt stabilizers and metal soap composite heat stabilizers, and when various stabilizers are used alone, some are more toxic, some are weaker, and some are more costly. In recent years, the research and application of composite stabilizers have gradually increased, and some good results have been achieved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The first step is to weigh an appropriate amount of lanthanum carbonate and add a certain amount of deionized water, and then slowly add an appropriate amount of diluted nitric acid until the lanthanum carbonate is completely dissolved. Then add a little iron remover, boil for 40 minutes, filter, and adjust the pH of the filtrate to 3-4 to obtain a lanthanum nitrate solution. Use EDTA to titrate the concentration of the solution and store it for later use.

[0019] In the second step, the reactor is equipped with an electronic stirrer, placed in a water bath, a certain amount of cyanuric acid and an appropriate amount of deionized water are respectively added, heated and stirred to 80°C, and then stirred at a constant temperature for 20 minutes. Add an appropriate amount of lanthanum nitrate prepared above, and after stirring evenly, add an appropriate amount of aqueous sodium hydroxide solution with a molar concentration of 1.5 mol / L. Stir continuously, keep the temper...

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Abstract

The invention discloses a novel lanthanum cyanurate composite PVC (polyvinyl chloride) heat stabilizer. A preparation method of lanthanum cyanurate comprises the following steps of: mixing lanthanum carbonate with nitric acid; stirring the mixture so that lanthanum carbonate is completely dissolved; boiling; filtering; and adjusting pH value to obtain lanthanum nitrate; adding lanthanum nitrate to cyanuric acid, heating and stirring to be uniform; then adding sodium hydroxide with appropriate solubility and continuing stirring for a certain time; and filtering, washing, dehydrating and drying to finally obtain lanthanum cyanurate. Lanthanum cyanurate serving as a heat stabilizer has good synergic effect with calcium stearate, zinc stearate and pentaerythritol and the heat stability of PVC can be improved by combined use of lanthanum cyanurate, calcium stearate, zinc stearate and pentaerythritol.

Description

technical field [0001] The invention relates to a novel lanthanum cyanurate composite PVC heat stabilizer, in particular to a preparation method of a PVC rare earth heat stabilizer. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general-purpose plastics. Its products have the advantages of high mechanical properties, good electrical insulation, low cost, easy control of hardness, corrosion resistance, and good transparency. They are widely used in agricultural and industrial production. Construction sector. However, the thermal stability of PVC is poor, and it is prone to degradation and crosslinking reactions under the action of external conditions such as light, heat, oxygen and force, resulting in difficulties in processing and use. Due to the special structure of PVC, PVC is easily thermally degraded at a relatively low temperature during processing to produce hydrogen chloride (HCl) gas, resulting in discoloration of PVC or a decrease in its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K5/3492C08K5/00C08K5/098C08K5/053C08K5/07
Inventor 赫川李玉丹
Owner TIANJIN DAOJUN PACKAGING PROD SALES
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