Rare earth complex and its preparation method and use

A technology of rare earth complexes and rare earth elements, applied in the field of rare earth complexes and their preparation, can solve the problems of poor PVC stability, toxic lead salt stabilizers, lack of lubricity, etc., and achieves improved thermal stability and mechanical properties. , the effect of improving tensile strength and elongation at break

Active Publication Date: 2012-08-08
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead salt heat stabilizers have excellent thermal stability and low price, but lead salt stabilizers are poisonous, lack lubricity, and will form black PbS when encountering sulfur, so they are not suitable for places with sulfur pollution
Most metal soap stabilizers are non-toxic and have a certain lubricating effect, especially the calcium-zinc complex soap, whose application range is gradually increasing, but the calcium-zinc heat stabilizer has the problem of "zinc burning" and its ability to stabilize PVC is poor
Organotin stabilizers have excellent thermal stability, but they are expensive and currently have less output

Method used

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  • Rare earth complex and its preparation method and use
  • Rare earth complex and its preparation method and use
  • Rare earth complex and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: Synthesis and application of the complex of N-benzylmaleamide and lanthanum

[0037] synthesis:

[0038] Step 1, stirring and reacting maleic anhydride and refined benzylamine in ethyl acetate (analytically pure) until the temperature of the reaction system begins to drop, and vacuum drying to constant weight after filtration to obtain N-benzylmaleamide acid;

[0039] Step 2, take a certain amount of N-benzylmaleamic acid described in step 1 and join in the ethanol solution of sodium hydroxide of equimolar amount, obtain the ethanol solution of N-benzylmaleamic acid sodium after the reaction is complete;

[0040] Step 3, in the ethanolic solution of N-benzylmaleamide sodium described in step 2, add dropwise stoichiometric (n La : n OA =1:3) of the 0.4mol / L lanthanum chloride solution, reacted under the condition of 20 ℃ for 20 minutes to generate a precipitate, the precipitate was filtered and washed and then vacuum-dried to constant weight to obtain th...

Embodiment 2

[0069] Embodiment 2: Synthesis and application of the complex of N-allyl maleamic acid group and samarium

[0070] synthesis:

[0071] Step 1, stirring and reacting maleic anhydride and refined allylamine in acetone (analytically pure) until the temperature of the reaction system begins to drop, and vacuum-drying to constant weight after filtration to obtain N-allylmaleic acid Amic acid;

[0072] Step 2, get a certain amount of N-allyl maleamic acid described in step 1 and join in the ethanol solution of the potassium hydroxide of equimolar amount, obtain the ethanol of N-allyl maleamic acid potassium after the reaction is complete solution;

[0073] Step 3, in the ethanol solution of potassium N-allyl maleamate described in step 2, add dropwise stoichiometric (n La : n OA =1:2.5) of 0.4mol / L samarium nitrate solution, reacted for 20 minutes under the condition of 30°C to generate a precipitate, the precipitate was filtered and washed and then vacuum-dried to constant weig...

Embodiment 3

[0085] Example 3: Synthesis and application of the complex of N-dodecylmaleamide and dysprosium

[0086] synthesis:

[0087] Step 1, stirring and reacting maleic anhydride and refined dodecylamine in diethyl ether (analytically pure) until the temperature of the reaction system begins to drop, and vacuum drying to constant weight after filtration to obtain N-dodecylmaline Lyamic acid;

[0088] Step 2, take a certain amount of N-dodecylmaleamic acid described in step 1 and add it to the ethanol solution of ammonia in an equimolar amount, and obtain N-dodecylmaleamic acid salt ethanol solution after the reaction is complete ;

[0089] Step 3, in the N-dodecyl maleamic acid salt ethanol solution described in step 2, add dropwise stoichiometric (n La : n OA =1:3.5) of 0.4mol / L dysprosium perchlorate solution, at a temperature of 30°C, reacted for 20 minutes to generate a precipitate, which was vacuum-dried to constant weight after the precipitate was filtered and washed to obt...

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Abstract

The invention discloses a rare earth complex. The rare earth complex is an N-alkyl maleamic acid-rare earth complex having a chemical formula of RE(OA)3.nH2O, wherein RE represents a rare-earth element; OA represents N-alkyl maleamic acid radical; and n is equal to 1 or 2. The invention also discloses a preparation method of the rare earth complex and a use of the rare earth complex in a polrvinyl chloride (PVC) heat stabilizer. The rare earth complex can be prepared by simple processes, and has a low cost and industrial application prospects. The rare earth complex or a composition of the rare earth complex as a PVC heat stabilizer overcomes the defects of the existing heat stabilizers, and improves primary dyeing properties and long-term thermal stability of PVC. Especially, the rare earth complex has good synergistic effects with calcium stearate, organic tin and pentaerythritol and thus under unified use, the thermal stability of PVC is improved. In addition, the rare earth complex can effectively improve mechanical properties of a PVC material.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a rare earth complex and its preparation method and application. Background technique [0002] Polyvinyl chloride (PVC) plastics are widely used for their good flame retardancy, wear resistance, chemical corrosion resistance, low gas and water vapor permeability, comprehensive mechanical properties, product transparency, electrical insulation, heat and sound insulation, etc. . At the same time, PVC resin is also a heat-sensitive resin. It is easy to remove HCl and cause degradation when processed under high temperature and high shear strength, resulting in product discoloration and mechanical properties. Therefore, a certain amount of stabilizer must be added during PVC processing to increase the decomposition temperature of PVC. With the wide application of rigid PVC resin in the construction industry, the total production and consumption of PVC resin wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C233/09C07C231/12C08L27/06C08K5/20C08K5/098C08K5/07C08K5/053C08K5/57
Inventor 李侃社汪晓芹陈创前康洁李锦刘向荣梁耀东牛红梅闫兰英
Owner XIAN UNIV OF SCI & TECH
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