Preparation method of PVC heat stabilizer tin-doped lanthanum acetylacetonate

A technology of lanthanum acetylacetonate and heat stabilizer, which is applied in the preparation of aldehyde/ketone chelates, organic chemistry, etc., and can solve problems such as poor thermal stability

Active Publication Date: 2020-10-23
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Monoalkyltin mercaptide has good initial thermal stability, but poor long-term thermal stability

Method used

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Embodiment 1

[0028] Embodiment 1: A kind of preparation method of PVC heat stabilizer tin-doped lanthanum acetylacetonate

[0029] A kind of preparation method of PVC thermal stabilizer tin-doped lanthanum acetylacetonate comprises the following steps:

[0030] Step 1: Weigh 2.9982 g SnCl 2 2H 2 O, 4.6951 g LaCl 3 ·6H 2 O, then mix lanthanum chloride hexahydrate with stannous chloride dihydrate to obtain metal salt mixture A; add metal salt mixture A to 40 ml of absolute ethanol, put it in a closed container, and then put it on a vortex shaker , using 750rmp for 4min to obtain reaction solution B;

[0031] Step 2: Put the reaction solution B into a transparent reaction container, stir at a stirring speed of 150r / min, and add acetylacetone into the transparent reaction container at a constant speed during the stirring process;

[0032] Step 3: Adjust the stirring speed to 425r / min, and keep the speed for reaction; meanwhile, add sodium hydroxide solution dropwise, adjust the pH value o...

Embodiment 2

[0041] Embodiment 2: A kind of preparation method of PVC heat stabilizer tin-doped lanthanum acetylacetonate

[0042] A kind of preparation method of PVC thermal stabilizer tin-doped lanthanum acetylacetonate comprises the following steps:

[0043] Step 1: Mix lanthanum chloride hexahydrate and stannous chloride dihydrate at a molar ratio of 1:1 to obtain a metal salt mixture A; mix the metal salt mixture A with absolute ethanol at a mass ratio of 10:100, and put it in an airtight In the container, then on the vortex shaker, adopt 500rmp to process 3min, obtain reaction solution B;

[0044] Step 2: Put the reaction solution B into a transparent reaction container, stir at a stirring speed of 100r / min, and add acetylacetone into the transparent reaction container at a constant speed during the stirring process;

[0045] Step 3: Adjust the stirring speed to 400r / min, and keep the speed for reaction; meanwhile, add sodium hydroxide solution dropwise, adjust the pH value of the r...

Embodiment 3

[0054] Embodiment 3: A kind of preparation method of PVC heat stabilizer tin-doped lanthanum acetylacetonate

[0055] A kind of preparation method of PVC thermal stabilizer tin-doped lanthanum acetylacetonate comprises the following steps:

[0056] Step 1: Mix lanthanum chloride hexahydrate and stannous chloride dihydrate at a molar ratio of 1:3 to obtain a metal salt mixture A; mix the metal salt mixture A with absolute ethanol at a mass ratio of 25:100, and put it in an airtight container, and then on a vortex shaker, using 1000rmp for 5min to obtain reaction solution B;

[0057] Step 2: Put the reaction solution B into a transparent reaction container, stir at a stirring speed of 200r / min, and add acetylacetone into the transparent reaction container at a constant speed during the stirring process;

[0058] Step 3: Adjust the stirring speed to 450r / min, and keep the speed for reaction; meanwhile, add sodium hydroxide solution dropwise, adjust the pH value of the reaction s...

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Abstract

The invention discloses a preparation method of a PVC heat stabilizer tin-doped lanthanum acetylacetonate. The preparation method comprises the following steps: (1) preparing a reaction solution, (2)preparing a sodium hydroxide solution, (3) feeding acetylacetone, (4) carrying out a first-stage reaction process, (5) carrying out a second-stage reaction process, (6) carrying out reaction liquid pretreatment, and (7) carrying out ultrasonic-assisted cleaning and after the cleaning is finished, collecting precipitates, namely the PVC heat stabilizer tin-doped lanthanum acetylacetonate. Accordingto the prepared PVC heat stabilizer tin-doped lanthanum acetylacetonate, the adding amount of the tin-doped lanthanum acetylacetonate in PVC is 0.10%-0.15%, and the adding amount of the tin-doped lanthanum acetylacetonate is reduced by 25%-50% compared with that of a common heat stabilizer, by adding and using the heat stabilizer, rapid reduction of the heat stability of PVC can be remarkably inhibited, and meanwhile, the color change time of PVC is prolonged.

Description

technical field [0001] The invention belongs to the technical field of compound heat stabilizer preparation, and relates to a preparation method of PVC heat stabilizer tin-doped lanthanum acetylacetonate. Background technique [0002] With the rapid development of social economy, the demand for polyvinyl chloride (PVC) is increasing day by day. PVC has the advantages of good plasticity, insulation, corrosion resistance, high temperature resistance, low price and high cost performance, and is widely used in various industries, such as pipes, doors and windows, home appliances, automobiles and our daily necessities. However, the thermal stability of PVC itself is relatively poor, and it will detach from hydrogen chloride under high temperature conditions to cause aging and discoloration. This shortcoming limits the development and use of PVC. Therefore, in actual production, it is often necessary to add various heat stabilizers to PVC to prolong the service life of PVC. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/77C07C49/92C07C49/14C08K5/00C08L27/06
CPCC07C45/77C08K5/0091C08L2201/08C07C49/92C07C49/14C08L27/06
Inventor 张忠洁余浩然
Owner ANHUI UNIVERSITY
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