Rare earth complex, preparation method and applications thereof

A technology of rare earth complexes and rare earth elements, applied in the field of National Natural Science Foundation of China project funding results, rare earth complexes and their preparation, can solve the problems of poor PVC stability, poisonous lead salt stabilizers, lack of lubricity, etc. , achieve excellent thermal stability and light and weather resistance, improve mechanical properties, and improve thermal stability

Active Publication Date: 2016-09-14
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, preparation method and applications thereof
  • Rare earth complex, preparation method and applications thereof
  • Rare earth complex, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh maleic anhydride and ethylenediamine respectively in a ratio of 2:1, dissolve maleic anhydride and ethylenediamine in acetonitrile respectively, and dissolve the acetonitrile solution of maleic anhydride drop by drop Add it to the acetonitrile solution of ethylenediamine, stir the reaction until complete precipitation, filter, wash with absolute ethanol, and dry in vacuum to obtain ethylenediamine bismaleamic acid;

[0029] Add the ethylenediamine bismaleamic acid prepared above and sodium hydroxide of twice the amount of the substance into methanol, and react in the methanol solution to obtain a methanol solution of sodium ethylenediamine bismaleamic acid;

[0030] Take a certain amount of methanol solution of sodium ethylenediamine bismaleamate, adjust the pH value to 7-8, and then add methanol solution of lanthanum chloride drop by drop to form a reaction solution, wherein lanthanum chloride and ethylenediamine bismaleamide The mass ratio of sodium maleamate is...

Embodiment 2

[0033] [La(H 2 O) 2 The application of L]OH as a heat stabilizer for polyvinyl chloride

[0034] [La(H) provided by the embodiment of the present invention 1 2 O) 2 ·L]OH can be used as heat stabilizer of polyvinyl chloride, specifically, the application in PVC resin processing is as follows:

[0035] Test group 1: PVC 100g, DOP 50g, [La(H 2 O) 2 ·L]OH 0.5g, mixed evenly, placed in an oven, and kept at 120°C for 20 minutes to prepare PVC test pieces.

[0036] Test group 2: PVC 100g, DOP 50g, [La(H 2 O) 2 · Mix 1g of L]OH evenly, place in an oven, and keep the temperature at 120°C for 20 minutes to prepare PVC test pieces.

[0037] Test group 3: PVC 100g, DOP 50g, [La(H 2 O) 2 ·L]OH 1.5g, mixed evenly, placed in an oven, and kept at 120°C for 20 minutes to prepare PVC test pieces.

[0038] Test group 4: PVC 100g, DOP 50g, [La(H 2 O) 2 ·L]OH 2g, mixed evenly, placed in an oven, and kept at 120°C for 20 minutes to obtain a PVC test piece.

[0039] Test group 5: PVC ...

Embodiment 3

[0070] Weigh maleic anhydride and ethylenediamine respectively in a ratio of 2:1, dissolve maleic anhydride and ethylenediamine in acetonitrile respectively, and dissolve the acetonitrile solution of maleic anhydride drop by drop Add it to the acetonitrile solution of ethylenediamine, stir the reaction until complete precipitation, filter, wash with absolute ethanol, and dry in vacuum to obtain ethylenediamine bismaleamic acid;

[0071] Add the ethylenediamine bismaleamic acid prepared above and potassium hydroxide of 2 times the amount of the substance into methanol, and react in the methanol solution to obtain a methanol solution of potassium ethylenediamine bismaleamate;

[0072] Take a certain amount of methanol solution of potassium ethylenediamine bismaleamate, adjust the pH value to 7-8, and then add a methanol solution of samarium chloride drop by drop to form a reaction solution, wherein samarium chloride and ethylenediamine bismaleamide The substance ratio of potassi...

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Abstract

The invention provides a rare earth complex. The rare earth complex is an ethylene diamine bis(maleic amide) rare earth complex, and the chemical formula of the rare earth complex is [RE(H2O)2.L]OH, wherein RE represents a rare earth element and L represents an ethylene diamine bis(maleic amide) group. The invention also provides a preparation method and an application of the rare earth complex as a polyvinyl chloride (PVC) stabilizing agent. The preparation method is simple, the cost is low, and thus the rare earth complex has an industrial application prospect. The provided rare earth complex or a composition thereof can be used as a PVC stabilizing agent, the shortages of conventional thermal stabilizing agents can be overcome, moreover, the primary coloring performance and long term stability of PVC are both improved; the rare earth complex, calcium stearate, organic tin, and pentaerythritol can generate a good synergetic effect and are capable of cooperatively improving the thermal stability of PVC; and at the same time, the mechanical properties of PVC are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, specifically relates to a rare earth complex and its preparation method and application, and is a funded achievement of the National Natural Science Foundation of China (approval number: 51173145). 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 applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/20C08K5/00C08L27/06C07C233/36C07C231/12
CPCC07C231/12C07C233/36C08K5/00C08K5/20C08L2201/08C08L27/06
Inventor 李侃社李苗梁耀东康洁牛红梅汪晓芹闫兰英陈创前章结兵李锦朱雪丹
Owner XIAN UNIV OF SCI & TECH
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