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A kind of polyvinyl chloride heat stabilizer and its preparation method and application

A heat stabilizer, polyvinyl chloride technology, applied in the preparation of carboxylic acid amides, chemical instruments and methods, preparation of organic compounds, etc., can solve problems such as zinc burning, prevent growth, inhibit discoloration, and improve long-term thermal stability. sexual effect

Active Publication Date: 2022-07-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a polyvinyl chloride heat stabilizer and its preparation method and application in order to solve the technical problem that the existing zinc soap heat stabilizer products on the market are prone to "zinc burn" in PVC

Method used

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  • A kind of polyvinyl chloride heat stabilizer and its preparation method and application
  • A kind of polyvinyl chloride heat stabilizer and its preparation method and application
  • A kind of polyvinyl chloride heat stabilizer and its preparation method and application

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Embodiment 1

[0049] The preparation method of a kind of polyvinyl chloride heat stabilizer of the embodiment of the present invention comprises the following steps:

[0050] 53.93g (molecular weight 98.06, 0.55mol) maleic anhydride was dissolved in 50g acetone, then 60.00g (molecular weight 121.14, 0.50mol) tris(hydroxymethylaminomethane) was added, and the reaction was performed at a constant temperature of 30°C for 3h. The solvent was removed by rotary evaporator and the product was dried to constant weight to give polyhydroxymaleamic acid.

[0051] 50.09g of polyhydroxy maleamic acid was added to the reaction vessel, and the temperature was raised to 70°C; 11.03g of zinc oxide (molecular weight 81.38, 0.14mol) or 7.59g calcium oxide (molecular weight 56.07, 0.14mol) were added, and the reaction was performed at a constant temperature for 5h to obtain Polyhydroxymaleamide calcium / zinc heat stabilizer.

[0052] The infrared spectra of polyhydroxymaleamic acid and polyhydroxymaleamide cal...

Embodiment 2

[0056] The preparation method of a kind of polyvinyl chloride heat stabilizer of the embodiment of the present invention comprises the following steps:

[0057] Dissolve 55.04g (molecular weight 100.07, 0.55mol) succinic anhydride in 50g acetone, then add 60.00g (molecular weight 121.14, 0.50mol) tris(hydroxymethylaminomethane), and react at 30°C for 3h. The solvent was removed by rotary evaporator and the product was dried to constant weight to obtain the polyhydroxyamic acid.

[0058] 50.09g of polyhydroxy amic acid was added to the reaction vessel, and the temperature was raised to 70°C; 11.03g of zinc oxide (molecular weight 81.38, 0.14mol) or 7.59g calcium oxide (molecular weight 56.07, 0.14mol) were added, and the reaction was performed at a constant temperature for 5 hours to obtain polyhydroxyl Amide calcium / zinc heat stabilizer.

Embodiment 3

[0060] The preparation method of a kind of polyvinyl chloride heat stabilizer of the embodiment of the present invention comprises the following steps:

[0061] Dissolve 53.93g (molecular weight 98.06, 0.55mol) maleic anhydride in 50g acetone, add 60.00g (molecular weight 121.14, 0.50mol) tris(hydroxymethyl)aminomethane, and react at 30°C for 4h. The solvent was removed by rotary evaporator and the product was dried to constant weight to give polyhydroxymaleamic acid.

[0062] 50.09g of polyhydroxy maleamic acid was added to the reaction vessel, and the temperature was raised to 70°C; 11.03g of zinc oxide (molecular weight 81.38, 0.14mol) or 7.59g calcium oxide (molecular weight 56.07, 0.14mol) were added, and the reaction was performed at a constant temperature for 5h to obtain Polyhydroxymaleamide calcium / zinc heat stabilizer.

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Abstract

The invention discloses a polyvinyl chloride heat stabilizer and a preparation method and application thereof. The structural formula of the polyvinyl chloride heat stabilizer is as follows: the preparation method comprises the following steps: oxidizing polyhydroxy amic acid with calcium or zinc compound or hydroxide, and react at 60-150°C to obtain the polyvinyl chloride heat stabilizer. The invention can solve the technical problem that the existing zinc soap heat stabilizer products on the market easily cause "zinc burning" of PVC.

Description

technical field [0001] The invention belongs to the technical field of polyvinyl chloride heat stabilizers, in particular to a polyvinyl chloride heat stabilizer and a preparation method and application thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the top five general-purpose resins in the world. It has excellent comprehensive properties and high cost performance, and is widely used. There are many structural defects in PVC molecules (such as tertiary carbon chloride structure, allyl chloride structure, etc.), which lead to its easy degradation during processing. With the increase of the degree of degradation, the color of PVC changes from white to yellow, brown, brown to black, which seriously affects the appearance and performance of PVC products, and greatly reduces the application value of PVC. [0003] In the process of PVC processing, adding an appropriate amount of heat stabilizer can significantly inhibit its degradation and improve its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C233/20C07C231/12C08K5/20C08L27/06
CPCC07C233/20C08K5/20C08L2201/08C08L27/06
Inventor 井新利刘兆年王镇白周怡馨张晓婷
Owner XI AN JIAOTONG UNIV