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Organic stannic acid intercalated calcium/zinc-aluminum rare earth hydrotalcite complex heat stabilizer for rigid PVC and preparation method thereof

A technology of compounding thermal stabilizer and hydrotalcite, applied in the field of thermal stabilizer for PVC, can solve problems such as poor thermal stability, and achieve the effects of low cost, significant social and economic benefits, and low processing energy consumption

Active Publication Date: 2019-11-08
TANGSHAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional magnesium aluminum hydrotalcite has poor thermal stability and can only be used as an auxiliary thermal stabilizer

Method used

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  • Organic stannic acid intercalated calcium/zinc-aluminum rare earth hydrotalcite complex heat stabilizer for rigid PVC and preparation method thereof
  • Organic stannic acid intercalated calcium/zinc-aluminum rare earth hydrotalcite complex heat stabilizer for rigid PVC and preparation method thereof
  • Organic stannic acid intercalated calcium/zinc-aluminum rare earth hydrotalcite complex heat stabilizer for rigid PVC and preparation method thereof

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preparation example Construction

[0024] According to the preparation method of the organic stannoic acid intercalated calcium / zinc-aluminum rare earth hydrotalcite composite heat stabilizer for rigid PVC in the second aspect of the present invention, it is used to prepare the organic stannic acid intercalated calcium / zinc-aluminum in the first aspect of the present invention The rare earth hydrotalcite composite thermal stabilizer comprises the steps of: (1) dissolving calcium salt, aluminum salt and rare earth salt in the deCO 2 solution in deionized water, while sodium hydroxide and organostannic acid were dissolved in deCO 2 In a mixed solution of deionized water and ethanol, where n(NaOH) / [n(M 2+ )+n(M 3+ )]=2.5~3, n(organic stannic acid) / n(M 3+ )=2~2.5, n is the amount of substance, M + is a metal ion, M 3+ Represents all the trivalent metal ions in the solution; (2) in N 2The protection and water bath are at a temperature of 60°C to 70°C. Place the two solutions of step (1) in a constant temperatur...

Embodiment 1

[0031] Step (1): Weigh 32.8g calcium nitrate, 37.5g aluminum nitrate, 5.2g lanthanum nitrate and dissolve in 2 In deionized water, weigh and weigh 36.0g sodium hydroxide, 87.7g dibutyltin dimaleic acid dissolved in deCO2 2 in a mixed solution of deionized water and ethanol.

[0032] Step (2): at N 2 The temperature of the protection and water bath is 70°C. Put the above two solutions into a constant temperature dropping funnel, and drop them into a four-necked flask using the double drop method. Increase the reaction temperature to 85°C, stir, and keep the pH of the reaction solution at 11. , Reflux for 3 hours after the dropwise addition, then add the above solution into the hydrothermal kettle, sink at 120°C for 6 hours, filter with suction, and wash the solution to be neutral. After drying and grinding, a white powder, that is, dibutyltin dimaleic acid intercalated calcium aluminum lanthanum hydrotalcite is obtained.

[0033] Step (3): replace calcium nitrate with 59.4g ...

Embodiment 2

[0036] Step (1): Weigh 16.7g calcium chloride, 6.7g aluminum chloride, 2.6g cerium nitrate and dissolve in 2 In deionized water, weigh 24.0g sodium hydroxide and 21.5g butyl stannic acid in deCO2 2 in a mixed solution of deionized water and ethanol.

[0037] Step (2): at N 2 The temperature of the protection and water bath is 65°C. The above two solutions are respectively placed in a constant temperature dropping funnel, and are added dropwise to a four-necked flask by the double drop method. The reaction temperature is increased to 80°C, stirred, and the pH of the reaction solution is maintained at 12 , Reflux for 2 hours after the dropwise addition, then add the above solution into the hydrothermal kettle, sink at 120°C for 5 hours, filter with suction, and wash the solution to be neutral. After drying and grinding, a white powder is obtained, that is, butyl stannic acid intercalated calcium aluminum cerium hydrotalcite.

[0038] Step (3): Substitute 20.4 g of zinc chlori...

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Abstract

The invention provides an organic stannic acid intercalated calcium / zinc-aluminum rare earth hydrotalcite complex heat stabilizer for rigid PVC and a preparation method thereof. The organic stannic acid intercalated calcium / zinc-aluminum rare earth hydrotalcite complex heat stabilizer for rigid PVC comprises the following components in parts by mass: 30-90 parts of organic stannic acid intercalated calcium-aluminum rare earth hydrotalcite and 10-50 parts of organic stannic acid intercalated zinc-aluminum rare earth hydrotalcite. The preparation method comprises the following steps: (1) dissolving a calcium salt, an aluminum salt and a rare earth salt in deionized water to obtain a solution, dissolving sodium hydroxide and organic stannic acid in a mixed solution of deionized water and ethanol; (2) adding the two solutions dropwise, and carrying out reflux, precipitation, suction filtration and washing; and carrying out drying and grinding to obtain the organic stannic acid intercalatedcalcium-aluminum rare earth hydrotalcite; (3) replacing the calcium salt with a zinc salt, and repeating the steps (1) and (2) to obtain the organic stannic acid intercalated zinc-aluminum rare earthhydrotalcite; and (4) mixing the two hydrotalcites according to the parts by mass. When used for rigid PVC, the organic stannic acid intercalated calcium / zinc-aluminum rare earth hydrotalcite complexheat stabilizer can effectively improve the thermal stability of the rigid PVC.

Description

technical field [0001] The invention relates to a heat stabilizer for PVC, in particular to an organic stannic acid intercalation calcium / zinc-aluminum rare earth hydrotalcite composite heat stabilizer for rigid PVC and a preparation method thereof. Background technique [0002] Rigid polyvinyl chloride (PVC) products are widely used in various fields such as industry, agriculture, and life because of their excellent performance and low price. However, rigid PVC is a heat-sensitive material, and heat stabilizers need to be added during molding to prevent it from degrading and crosslinking due to heat. At present, my country's traditional lead salt heat stabilizers are gradually withdrawing from the market due to toxicity. Ca / Zn stabilizers are non-toxic, environmentally friendly and lubricious, but their thermal stability is not as good as that of lead salts. Rare earth elements in rare earth heat stabilizers can play a stabilizing role through coordination, and the initia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K3/26C08K5/57
CPCC08K3/26C08K5/57C08L27/06C08L2201/08
Inventor 张宁李先铭
Owner TANGSHAN NORMAL UNIV
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