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Hgdrotalcite base chlorine containing high polymer composite heat stabilizing agent

A heat stabilizer and high polymer technology, which is applied in the field of hydrotalcite-based chlorine-containing high polymer composite heat stabilizers, and can solve the problems of lead and other problems

Active Publication Date: 2005-03-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a hydrotalcite-based chlorine-containing high polymer composite thermal stabilizer that does not contain toxic elements in order to overcome the shortcomings of the existing hydrotalcite-based chlorine-containing high polymer composite heat stabilizer. stabilizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9

[0026] Weigh 48.15g MgSO 4 (0.4mol) and 66.64gAl 2 (SO 4 ) 3 18H 2 O (0.1mol), after mixing, add deionized water to 500ml to prepare Mg 2+ / Al 3+ A mixed salt solution with a molarity of 2; weigh 42.4gNa 2 CO 3 (0.4mol) and 38.4gNaOH (0.96mol) were added to deionized water to 500ml to prepare a mixed alkali solution, and the CO in the alkali solution 3 2- and OH - The molar concentration satisfies n(CO 3 2- ) / n(Al 3+ )=2, n(OH - ) / [n(Mg 2+ )+n(Al 3+)]=1.6. The above two solutions were quickly mixed in a rotating liquid film reactor, and the slurry obtained after mixing was refluxed and crystallized at 100°C for 6 hours, and the precipitate was washed to pH ≈ 7 to obtain a hydrotalcite filter cake, and about 30 times of the filter cake solid was added content of water, the temperature is raised to 80° C., and stearic acid with a solid content of 5% is added and stirred for 2 hours. After drying, a surface-modified hydrotalcite powder with a magnesium / aluminum ra...

Embodiment 10～15

[0032] Change the composition and ratio of the composite heat stabilizer, add it to 100 parts of PVC or other chlorine-containing high polymers according to different dosages, add 50 parts of DOP, then knead and tablet, in a heat aging test box at 180±1°C The static aging experiment was carried out, and the results are shown in Table 2:

[0033] Table 2

[0034] Example

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PUM

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Abstract

A hydrotalcite-based composite thermal stabilizer for PVC and chlorine-contained high polymer is prepared from hydrotalcite, calcium soap and zinc soap through proportionally mixing.

Description

Technical field: [0001] The invention relates to a hydrotalcite-based chlorine-containing high polymer composite thermal stabilizer, in particular to a calcium / zinc compound hydrotalcite-based chlorine-containing high polymer composite thermal stabilizer. Background technique: [0002] PVC resin has the characteristics of incombustibility, high mechanical properties, low price, rich sources of raw materials, mature manufacturing process, etc. Large class of general purpose thermoplastics. However, the thermal stability of PVC itself is very poor. Its flow temperature is 136°C and its decomposition temperature is 140°C. The difference between the two is only 4°C, which brings great difficulties to processing and use. Therefore, a certain amount of heat stabilizer must be added. Other chlorine-containing high polymers will also undergo autocatalytic reactions of HCl removal under heat or ultraviolet irradiation, which will reduce the various properties of the material. Heat ...

Claims

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Application Information

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IPC IPC(8): C08K3/26C08K5/098C08L27/04
CPCC08K5/098
Inventor 段雪李殿卿林彦军
Owner BEIJING UNIV OF CHEM TECH
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