Light rare-earth hydrotalcite-curcumin composite heat-stable assistant and preparation method thereof

A technology of heat stabilization assistant and light rare earth, which is applied in the field of polyvinyl chloride molding and processing, can solve the problems of high price of organotin heat stabilizers, toxic heat stabilizers of heavy metals, etc., and achieves simple formula composition and preparation process, and simple raw materials. Rich, wide-ranging effects

Inactive Publication Date: 2014-04-23
TANGSHAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the disadvantages of the prior art that heavy metal heat stabilizers are toxic and that organotin heat stabilizers are expensive. Light rare earth hydrotalcite-curcumin composite thermal stabilization additive for molding processing, the second is to provide a preparation method of light rare earth hydrotalcite-curcumin composite thermal stabilization additive

Method used

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  • Light rare-earth hydrotalcite-curcumin composite heat-stable assistant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] The lanthanum-magnesium hydrotalcite-curcumin composite thermal stability aid, calculated in parts by weight, includes 100 parts of lanthanum-magnesium hydrotalcite, 10 parts of curcumin, and 20 parts of calcium stearate.

[0020] Premix the lanthanum magnesium hydrotalcite and calcium stearate evenly at 100 o C Mechanical stirring and mixing for 3 hours, the speed of the mixer is 500±20 rpm to obtain the material pre-mixture. The material premix is ​​cooled to 50 o After C, pre-mix with curcumin evenly, at 50 o C Mechanical stirring and mixing for 2 hours, the speed of the mixer is 300 rpm. The material is cooled to room temperature to obtain the lanthanum magnesium hydrotalcite-curcumin composite thermal stabilization aid.

Embodiment 2

[0022] Lanthanum-Nd-Mg-Mg hydrotalcite-curcumin composite thermal stability aid, according to parts by weight, take 60 parts of Lanthanum-Mg-Mg hydrotalcite, 45 parts of Nd-Mg hydrotalcite to form 105 parts of Lanthanum-Nd-Mg-Mg hydrotalcite, 90 parts of curcumin, stearin Calcium acid 40 parts.

[0023] 105 parts of lanthanum, neodymium and magnesium hydrotalcites are premixed with calcium stearate evenly, at 120 o C Mechanical stirring and mixing for 3 hours, the speed of the mixer is 700±20 rpm to obtain the material pre-mixture. Material premix material cooling to 60 o After C, pre-mix with curcumin evenly, at 60 o C Mechanical stirring and mixing for 2 hours, the speed of the mixer is 500 rpm. The material is cooled to room temperature to obtain the lanthanum neodymium magnesium hydrotalcite-curcumin composite thermal stabilization aid.

Embodiment 3

[0025] Neodymium-magnesium hydrotalcite / cerium-europium-magnesium hydrotalcite-curcumin composite thermal stability aid, in parts by weight, 40 parts of neodymium-magnesium hydrotalcite, 60 parts of cerium-europium-magnesium hydrotalcite, 90 parts of curcumin, 20 parts of calcium stearate share.

[0026] The neodymium magnesium hydrotalcite, cerium europium magnesium hydrotalcite and calcium stearate are pre-mixed evenly, at 110 o C Mechanical stirring and mixing for 3 hours, the speed of the mixer is 600±20 rpm to obtain the material pre-mixture. Material premix material cooling to 50 o After C, pre-mix with curcumin evenly, at 50 o C Mechanical stirring and mixing for 2 hours, the speed of the mixer is 400 rpm. The material is cooled to room temperature to obtain the neodymium magnesium hydrotalcite / cerium europium magnesium hydrotalcite-curcumin composite thermal stabilization aid.

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Abstract

The invention relates to the field of polyvinyl chloride molding and processing, and particularly relates to a composite heat-stable assistant for VC molding and processing and a preparation method thereof. The stable assistant comprises the following raw materials in parts by weight: 100-120 parts of light rare-earth magnesium hydrotalcite, 20-90 parts of curcumin and 20-40 parts of calcium stearate. The preparation method comprises the following steps: evenly premixing light rare-earth hydrotalcite with calcium stearate; mechanically stirring and mixing at 100-120 DEG C for 3 hours, wherein the rotating speed of an agitator is 400-800r/min; cooling the material to 40-60 DEG C, so as to obtain a material pre-mixture; evenly mixing the curcumin with the material pre-mixture; mechanically stirring and mixing at 40-60 DEG C for 2 hours, wherein the rotating speed of the agitator is 300-500r/min; cooling the materials to room temperature, so as to obtain the composite heat-stable assistant. The light rare-earth hydrotalcite-curcumin composite heat-stable assistant is wide in raw material source, low in cost, and friendly to environment, and has excellent strength and toughness.

Description

technical field [0001] The present invention relates to the field of polyvinyl chloride molding and processing, in particular to an environmentally friendly light rare earth hydrotalcite-curcumin-calcium composite thermal stabilization additive suitable for dark-colored rigid polyvinyl chloride products for PVC molding processing and its Preparation. Background technique [0002] At present, the heat stabilizers used in the PVC industry on the market include heavy metal heat stabilizers, organotin heat stabilizers, and calcium-zinc / magnesium-aluminum hydrotalcite composite stabilizers. Heavy metal heat stabilizers are toxic and not popular with users. The heat stabilizer is expensive, and the calcium zinc / magnesium aluminum hydrotalcite composite stabilizer has poor mechanical properties. [0003] Hydrotalcite can ease the degradation rate of PVC and improve the processing thermal stability of PVC. Due to the special extranuclear electronic structure and large ionic radius...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K3/22C08K5/132C08K5/098
Inventor 李德玲张宁于静王光荣
Owner TANGSHAN NORMAL UNIV
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