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Preparation methods of castor oil base carboxylate radical intercalated hydrotalcite for PVC (Polyvinyl Chloride) and compound heat stabilizer thereof

A composite heat stabilizer and oleyl carboxylic acid technology, which is applied in the field of preparation and application of plastic additives, can solve problems such as unsatisfactory initial effect, slow absorption of HCl, complex synthesis process, etc., and achieve excellent thermal stability.

Active Publication Date: 2013-12-25
WUXI ACP STEEL CORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of material called hydroxycarbonates (HC) can be used for making stable compositions with good resistance against high temperatures such as those caused during refrigerator use or storage conditions. It also improves their durability over other types of polymers that have been previously developed due to environmental concerns associated therewith.

Problems solved by technology

This patented technical problem addressed by this patents relates to finding better ways to improve the properties of poly( vinylchloride)-hemiester), particularly when added to plastic products like those made through injection mold processes due to lack of sufficient heat stability without adding expensive chemical substances.

Method used

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  • Preparation methods of castor oil base carboxylate radical intercalated hydrotalcite for PVC (Polyvinyl Chloride) and compound heat stabilizer thereof
  • Preparation methods of castor oil base carboxylate radical intercalated hydrotalcite for PVC (Polyvinyl Chloride) and compound heat stabilizer thereof
  • Preparation methods of castor oil base carboxylate radical intercalated hydrotalcite for PVC (Polyvinyl Chloride) and compound heat stabilizer thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of Ricinoleic Acid Intercalated Hydrotalcite

[0027] (1) To 7.71g of ricinoleic acid, add 100mL to remove CO 2 deionized water, adjust the pH of the solution with dilute nitric acid to make the solution pH=4~6.

[0028] (2) The ordinary hydrotalcite is calcined, the calcining temperature is 450°C, the heating rate is 4°C / min, and the calcining time is 5h.

[0029] (3) Add 3.95g of calcined hydrotalcite to the above-mentioned ricinoleic acid solution, control the reaction temperature to 135°C, and the reaction time to 6h. After the reaction product is filtered, washed and dried, ricinoleic acid radical intercalation water is obtained. Talc, recorded as LDHs-RA.

Embodiment 2

[0031] Preparation of ricinoleyl maleate carboxylate intercalated hydrotalcite

[0032] (1) Add 68.62g of ricinoleic acid and 21.58g of maleic anhydride into a 250mL three-necked flask with a condenser and stir well. Raise the temperature to 90°C and react for 3.5 hours to obtain ricinoleyl maleate, which is denoted as RAM.

[0033] (2) To 4.51g of RAM, add 100mL to remove CO 2 deionized water, adjust the pH of the solution with dilute nitric acid to make the solution pH=4~6.

[0034] (3) The ordinary hydrotalcite is calcined, the calcining temperature is 450°C, the heating rate is 4°C / min, and the calcining time is 5h.

[0035] (4) Add 7.89g of calcined hydrotalcite to the above castoroleyl maleate solution, control the reaction temperature to 135°C, and the reaction time to 7h. The reaction product is filtered, washed and dried to obtain maleic acid Acid ricinoleyl carboxylate intercalated hydrotalcite, denoted as LDHs-RAM.

Embodiment 3

[0037] Preparation of Ricinol Hexahydrophthalate Carboxylate Intercalated Hydrotalcite

[0038] (1) Add 68.62g of ricinoleic acid and 33.92g of hexahydrophthalic anhydride into a 250mL three-necked flask with a condenser and stir well. Raise the temperature to 100°C and react for 3.5 hours to obtain ricinoleol hexahydrophthalate, which is denoted as RAH.

[0039] (2) To 3.47g of RAH, add 100mL to remove CO 2 deionized water, adjust the pH of the solution with dilute nitric acid to make the solution pH=4~6.

[0040] (3) The ordinary hydrotalcite is calcined, the calcining temperature is 450°C, the heating rate is 4°C / min, and the calcining time is 5h.

[0041] (4) Add 5.26g of calcined hydrotalcite to the above castoroleyl hexahydrophthalate solution, control the reaction temperature to 135°C, and the reaction time to 7h. The reaction product is filtered, washed and dried. The hydrotalcite intercalated with ricinoleyl hexahydrophthalate carboxylate is obtained, which is deno...

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Abstract

The invention provides preparation methods of castor oil base carboxylate radical intercalated hydrotalcite for PVC (Polyvinyl Chloride) and a compound heat stabilizer thereof, belonging to the technical field of the preparation and applications of plastic additives. The preparation method of the castor oil base carboxylate radical intercalated hydrotalcite for the PVC is characterized in that castor oil base carboxylate radicals are intercalated into hydrotalcite interlayers by adopting a roasting restoring method, so that the castor oil base carboxylate radical intercalated hydrotalcite is prepared. The prepared castor oil base carboxylate radical intercalated hydrotalcite has excellent thermal stability. The improvement effect of the castor oil base carboxylate radical intercalated hydrotalcite serving as an auxiliary heat stabilizer on a calcium stearate/zinc stearate system is superior to that of carbonate radical intercalated hydrotalcite. When the castor oil base carboxylate radical intercalated hydrotalcite serves as a long-term thermal stabilizer, the static thermal stability time of the castor oil base carboxylate radical intercalated hydrotalcite, maleic acid castor-oil plant alcohol ester carboxylate radical intercalated hydrotalcite and cis-hexahydrophthalic acid castor-oil plant alcohol ester carboxylate radical intercalated hydrotalcite is respectively 87.7 minutes, 68.4 minutes and 63.6 minutes at 180 DEG C, the static thermal stability time of the castor oil base carboxylate radical intercalated hydrotalcite is longer than the 37.9-minute static thermal stability time of calcium stearate; and the long-term thermal stability time of the castor oil base carboxylate radical intercalated hydrotalcite is more ideal than that of the calcium stearate. The raw materials and the products are safe, environment-friendly, non-toxic and pollution-free.

Description

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Claims

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Application Information

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Owner WUXI ACP STEEL CORE
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