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Ca/Zn compound heat stabilizer

A technology of composite heat stabilizer and main stabilizer, which is applied in the field of Ca/Zn composite heat stabilizer, can solve the problems of poor thermal stability and failure to meet the needs well, and achieve good heat resistance, low cost, and significant social Effects of Benefits and Economic Benefits

Inactive Publication Date: 2010-10-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of the current Ca / Zn heat stabilizers is that they have poor thermal stability in the later stage and cannot meet the needs well.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 1000kg of stearic acid into the reaction kettle, heat and melt, when the temperature rises to about 115°C, add 57kg of ZnO, keep the temperature for reaction, until the reaction liquid becomes light or slightly blue, then raise the temperature to At about 120°C, continue stirring and add 71.7kg Ca(OH) at the same time 2 Carry out the reaction until no bubbles are formed. If there are small white spots in the reaction solution, you can slightly increase the temperature until the small white spots disappear; continue to heat up to about 125°C, add a mixture of 80kg hydrotalcite and 80kg hydrotalcite-like substances, and stir evenly , and then put in 150kg of auxiliary stabilizer stearyl benzoyl methane and 305.7kg of pentaerythritol adipate, 101019.8kg of antioxidants, UV5311.5kg and UV-3262.3kg, lubricant PE-WAX 40kg and talc The powder is 79kg, after stirring and mixing, finally, the cooling temperature is about 95°C, unloading, cooling, crushing, sieving, and bag...

Embodiment 2

[0025] Weigh 1030kg of lauric acid into the reaction kettle, heat and melt, when the temperature rises to about 115°C, add 124.5kg of ZnO, keep the temperature for reaction, until the reaction liquid becomes light or slightly blue, then raise the temperature to 120°C ℃, continue stirring, while adding 89kg Ca(OH) 2 Carry out the reaction until no bubbles are generated. If there are small white spots in the reaction solution, the temperature can be raised slightly until the small white spots disappear. Continue to heat up to about 125°C, add 145kg of hydrotalcite and 127.5kg of hydrotalcite-like mixture, stir evenly, and then put in 220kg of auxiliary stabilizer stearoylbenzoylmethane, 259kg of pentaerythritol adipate, and antioxidant DLTP17. 8kg, ultraviolet absorber UV-5313.3kg, UV3263.4kg, lubricant EVA3100.8kg and talcum powder 90kg, after stirring and mixing, finally, cooling temperature to about 95 ℃, unloading, cooling, crushing, sieving, bagging .

Embodiment 3

[0027] Weigh 654.1kg of lauric acid into the reaction kettle, heat and melt, when the temperature rises to about 115°C, add 74.5kg of ZnO, keep the temperature for reaction, until the reaction solution becomes light or slightly blue, then raise the temperature to At about 120°C, continue to stir and add 60.3kg of Ca(OH) at the same time 2 Carry out the reaction until no bubbles are generated. If there are small white spots in the reaction solution, the temperature can be raised slightly until the small white spots disappear. Continue to heat up to about 125°C, add 127.5kg of hydrotalcite and 127.5kg of hydrotalcite-like mixture, stir evenly, and then add 263kg of auxiliary stabilizer isopentyl adipate, 10107.3kg of antioxidant, UV-5311.5 kg, UV3261.4kg, lubricant PE-WAX 83.8kg and talcum powder 60kg, after stirring and mixing. Finally, the cooling temperature is about 95°C, unloading, cooling, crushing, sieving, and bagging.

[0028] According to a national standard polyviny...

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PUM

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Abstract

The invention provides a Ca/Zn compound heat stabilizer, which is prepared by synthesizing a Ca/Zn main stabilizer by using higher fatty acid, ZnO and Ca(OH)2, matching with hydrotalcite and similar hydrotalcite substances and adding proper amount of auxiliary stabilizer, antioxidant, ultraviolet absorber, lubricant and talcum powder, wherein the Ca/Zn main stabilizer accounts for 40-60 percent, the hydrotalcite and similar hydrotalcite substances account for 7-20 percent, the auxiliary stabilizer accounts for 8-30 percent, the antioxidant accounts for 0.1-2.5 percent, the ultraviolet absorber accounts for 0.1-1.5 percent, the lubricant accounts for 1-15 percent and the calcium powder accounts for 1-15 percent, and the percent refers to weight percent. In the stabilizer, the hydrotalcite and similar hydrotalcite substances are mixed according to a certain proportion, thereby the heat resistance is very good, and the color changing time of Congo red can reach more than 80 min. The stabilizer can effectively restrain the degradation of polrvinyl chloride (PVC) material, which is caused by physical actions during forming and processing, such as heating, rubbing, cutting and the like, and exterior conditions in using process, such as light, heat, oxygen and the like, avoid the degradation or aging of the product and prevent the performance reduction of the PVC products. The invention can replace traditional lead salt and organo-tin heat stabilizer with expensive price, can be widely applied to the aspects of PVC processing and forming, and has remarkable social benefits and economic benefits.

Description

Technical field: [0001] The invention belongs to the preparation process of a composite heat stabilizer in polyvinyl chloride (PVC) processing aids, and in particular relates to a cheap, efficient and environment-friendly Ca / Zn composite heat stabilizer. technical background: [0002] Polyvinyl chloride (PVC) has been widely used in various fields such as industry, agriculture and national defense due to its good machinability and low price. In recent years, the world's total demand for PVC is still showing an increasing trend. However, due to the particularity of PVC structure, it has poor thermal stability, and it is easy to remove HCl during processing to generate unsaturated conjugated polyenes, resulting in products Discoloration, hardening, burning. In order to prevent the material from being degraded by heat, friction, shearing and other physical effects during the molding process and by external conditions such as light, heat, and oxygen during use, and causing prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02C08K3/22C08K5/09C08K3/26C08L27/06
Inventor 张胜涛吴锋景贺海云殷林亮
Owner CHONGQING UNIV
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