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Preparing method for anion intercalation modified hydrotalcite, product and application in PVC hard products

An anionic intercalation and modified water technology, which is applied to the application of anionic intercalation modified hydrotalcite in heat-resistant and smoke-suppressed rigid polyvinyl chloride products, and the field of anionic intercalation modified hydrotalcite and its preparation. Solve problems such as hazards and large quantities, and achieve the effects of reducing degradation, suppressing smoke, and having good dispersion.

Active Publication Date: 2015-11-25
ZHEJIANG HUAFENG NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rigid PVC products have good flame retardancy, but under severe conditions such as fire, they can burn and release a large amount of smoke and poisonous gas, causing serious harm
At present, there is no report on the preparation of anion intercalation modified hydrotalcite by combining urea derivatives and hydrotalcite

Method used

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  • Preparing method for anion intercalation modified hydrotalcite, product and application in PVC hard products
  • Preparing method for anion intercalation modified hydrotalcite, product and application in PVC hard products
  • Preparing method for anion intercalation modified hydrotalcite, product and application in PVC hard products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of embodiment 1 anion intercalation modified hydrotalcite

[0032] Dissolve 0.045mol of barbituric acid in 200mL of deionized water, and then add it into a 500mL three-necked flask as the bottom liquid, and connect two 100mL constant-pressure dropping funnels to the three-necked flask. Dissolve 0.03 mol of magnesium nitrate and 0.015 mol of aluminum nitrate in 100 mL of deionized water, then add them to the dropping funnel, and add 1 mol / L sodium hydroxide solution to another dropping funnel. Insert the pH meter into the three-necked flask, turn on the magnetic stirring, and the stirring rate is 120rpm. First slowly add sodium hydroxide solution dropwise to convert barbituric acid into barbiturate ions, adjust the pH value of the bottom liquid to 10, then add dropwise the mixed solution of magnesium nitrate and aluminum nitrate and sodium hydroxide solution at the same time, The pH value was controlled at 10±0.1. After the mixed solution of magnesium n...

Embodiment 2～8

[0034] The method of Example 1 was used to prepare barbituric acid intercalation modified hydrotalcite, the difference was that the type and amount of magnesium salt, aluminum salt and barbituric acid were changed, the amount of which is shown in Table 1.

[0035] Table 1

[0036]

[0037]

Embodiment 9～12

[0039] The method of Example 1 was used to prepare cyanuric acid intercalated modified hydrotalcite, except that barbituric acid was replaced by different amounts of cyanuric acid, as shown in Table 2.

[0040] Table 2

[0041]

[0042] attached figure 2 The XRD pattern of the cyanuric acid intercalation modified hydrotalcite prepared in Example 11, wherein the diffraction peaks at 23.5 °, 34.5 ° and 61.0 ° are derived from magnesium aluminum hydrotalcite (006), (009) and (110 ) crystal plane diffraction, the diffraction peak at 8.4° comes from the crystal plane diffraction of (003), corresponding to an interlayer spacing of 1.067nm, while the interlayer spacing of nitrate intercalation modified hydrotalcite is 0.75nm, indicating that cyanuric acid Intercalation modified hydrotalcite interlaminar spacing increases.

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Abstract

The invention discloses preparation of anion intercalation modified hydrotalcite, a product and application in smoke suppressing rigid polyvinyl chloride products. A coprecipitation method is used for preparing the anion intercalation modified hydrotalcite, namely the uron derivative intercalation modified magnalium binary hydrotalcite, and the mole ratio of magnesium ions and aluminum ions is 2:1-3:1. Uron derivatives are barbituric acid and cyanuric acid, the use amount of the barbituric acid is 0.9-1.8 that of the mole number of the magnesium ions, or the use amount of the cyanuric acid is 0.6-1.2 that of the mole number of the magnesium ions. The anion intercalation modified hydrotalcite integrates the advantages of conventional hydrotalcite and uron derivatives and is free of toxins and environmentally friendly; the anion intercalation modified hydrotalcite is used in cooperation with a calcium and zinc heat stabilizing agent, the heat stabilizing effect is good, the problem that the stabilizing effects of environmental-friendly heat stabilizing agents are poor is solved, in addition, the heat deformation temperature of the PVC rigid products can be effectively increased, smoke generated in PVC combustion is inhibited, and the anion intercalation modified hydrotalcite can be widely applied to the fields of pipes, door and window special-shaped materials, decoration plates and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an anion intercalation modified hydrotalcite and a preparation method thereof, and the application of the anion intercalation modified hydrotalcite in heat-resistant and smoke-suppressing rigid polyvinyl chloride products. Background technique [0002] Polyvinyl chloride (PVC) is a thermoplastic with high mechanical strength, good corrosion resistance, good flame retardancy, excellent electrical insulation, and low price. It is widely used in soft products such as food packaging, artificial leather, and medical equipment. , and in the production of hard products such as building materials and electronic appliances. However, PVC has poor thermal stability, so a thermal stabilizer must be added during processing to increase its thermal stability. [0003] PVC heat stabilizers mainly include lead salts, organic tin and metal soaps. Lead salt heat stabilizers are highly t...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K3/26C08L27/06C08K13/06C08K5/09
Inventor 朱理智陈敏申屠宝卿叶志群吴亦建刘予阳翁志学
Owner ZHEJIANG HUAFENG NEW MATERIAL
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