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Novel (1-sec-octyl, 2-tert-octyl)phthalate plasticizer and preparation method thereof

A phthalic acid di-plasticizer technology, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of oil resistance and gasoline extraction resistance and plasticization efficiency. Meet the needs of industrial production, poor light resistance and weather resistance, etc., to achieve gasoline extraction resistance, easy control, and good plasticizing effect.

Pending Publication Date: 2019-03-08
安阳市景晟科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used plasticizers on the market are mainly phthalate plasticizers, such as dioctyl phthalate (DOP), di-sec-octyl phthalate (DCP), etc. Although dioctyl formate (DOP) has better oil resistance and gasoline resistance and plasticizing efficiency, it often has defects such as light resistance and poor weather resistance, while di-sec-octyl phthalate (DCP) has better Good light resistance and weather resistance, but it is often not ideal in terms of oil resistance and gasoline resistance, extraction performance and plasticizing efficiency
This not only greatly limits the scope of application of traditional phthalate plasticizers, but with the rapid development of modern industry, the demand for plasticizers is increasing day by day, and traditional phthalate plasticizers have become more and more It is increasingly unable to meet the needs of industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of bis(1-second-octyl, 2-tert-octyl) phthalate (DCOP) novel plasticizer, comprising the following steps:

[0028] (1) Refined 2-octanol

[0029] The content ≥ 99.8% is subjected to alkali washing treatment to remove a very small amount of phenol and organic acid in the material, then fine filtration is used to remove trace metal ions, and finally dehydrated to obtain refined 2-octanol;

[0030] (2) Feeding and alcoholysis

[0031] According to the molar ratio of 1:1.15, phthalic acid and the above-mentioned refined 2-octanol were put into the first-stage reaction kettle, and after mixing evenly, the temperature was raised to 75°C at a stirring speed of 45r / min, and then reacted at constant temperature for 5h until alcohol The solution is complete to obtain the DCP monoester mixed solution;

[0032] (3) stripping dealcoholization

[0033] Introduce saturated steam of 0.4MPa into the DCP monoester mixed solution prepared above to carry out strippin...

Embodiment 2

[0039] A preparation method of bis(1-second-octyl, 2-tert-octyl) phthalate (DCOP) novel plasticizer, comprising the following steps:

[0040] (1) Refined 2-octanol

[0041] The content ≥ 99.8% is subjected to alkali washing treatment to remove a very small amount of phenol and organic acid in the material, then fine filtration is used to remove trace metal ions, and finally dehydrated to obtain refined 2-octanol;

[0042] (2) Feeding and alcoholysis

[0043] According to the molar ratio of 1:1.15, phthalic acid and the above-mentioned refined 2-octanol were put into the first-stage reaction kettle, and after mixing evenly, the temperature was raised to 80°C at a stirring speed of 50r / min, and then reacted at constant temperature for 4h until alcohol The solution is complete to obtain the DCP monoester mixed solution;

[0044] (3) stripping dealcoholization

[0045] Introduce saturated water vapor of 0.45MPa into the DCP monoester mixed solution prepared above to carry out s...

Embodiment 3

[0051] A preparation method of bis(1-second-octyl, 2-tert-octyl) phthalate (DCOP) novel plasticizer, comprising the following steps:

[0052] (1) Refined 2-octanol

[0053] The content ≥ 99.8% is subjected to alkali washing treatment to remove a very small amount of phenol and organic acid in the material, then fine filtration is used to remove trace metal ions, and finally dehydrated to obtain refined 2-octanol;

[0054] (2) Feeding and alcoholysis

[0055] According to the molar ratio of 1:1.15, phthalic acid and the above-mentioned refined 2-octanol were put into the first-stage reaction kettle, and after mixing evenly, the temperature was raised to 85°C at a stirring speed of 55r / min, and then reacted at a constant temperature for 3h until alcohol The solution is complete to obtain the DCP monoester mixed solution;

[0056] (3) stripping dealcoholization

[0057] Pass into the saturated steam of 0.5MPa in the above-mentioned obtained DCP monoester mixed solution to carr...

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Abstract

The invention relates to the technical field of production of plasticizers and discloses a novel (1-sec-octyl, 2-tert-octyl)phthalate plasticizer and a preparation method thereof. The (1-sec-octyl, 2-tert-octyl)phthalate plasticizer takes sec-octyl alcohol, phthalic acid and industrial ethyl hexanol as raw materials. The preparation method comprises the following steps: refining the sec-octyl alcohol, and carrying out a primary esterification reaction with phthalic acid to prepare a DCP monoester mixed solution; performing steam stripping dealcoholization to prepare a refined DCP monoester; adding the refined DCP monoester and the industrial ethyl hexanol into a secondary reactor, adding a catalyst, and carrying out a constant-temperature esterification reaction to obtain a DCOP diester mixed solution; finally, performing alkaline wash, steam stripping dealcoholization and actived carbon decoloration on the DCOP diester, thereby obtaining the novel (1-sec-octyl, 2-tert-octyl)phthalateplasticizer. The preparation method is simple in process, low in cost, high in yield, easy to control and capable of realizing large-scale production, and the prepared (1-sec-octyl, 2-tert-octyl)phthalate plasticizer is excellent in plasticizing effect and high in stability.

Description

technical field [0001] The patent of the invention relates to the technical field of plasticizer production, in particular to a novel plasticizer of bis(1-sec-octyl, 2-tert-octyl) phthalate and a preparation method thereof. Background technique [0002] As a polymer material additive, plasticizers can increase the mobility and plasticity of polymer molecular chains and reduce the crystallization of polymer molecular chains due to their ability to weaken the secondary bond between polymer molecules, that is, van der Waals force. It can improve the hardness, modulus, softening temperature and embrittlement temperature of polymers, improve the elongation, flexibility and flexibility of polymers, and has been widely used in engineering plastics, rubber coatings, adhesives, and sealing materials and other fields. [0003] At present, the commonly used plasticizers on the market are mainly phthalate plasticizers, such as dioctyl phthalate (DOP), di-sec-octyl phthalate (DCP), etc....

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C67/48C07C69/80
CPCC07C67/08C07C67/48C07C69/80
Inventor 李冬来郭志强田明奎孟繁堂崔卫民黄勇李运梅
Owner 安阳市景晟科技有限公司
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