Preparation method of cycloalkane anhydride plasticizer

A technology of naphthenes and plasticizers, which is applied in the field of preparation of naphthenes anhydride plasticizers, can solve the problems of poor miscibility and application restrictions, and achieve the effects of environmental friendliness, good appearance and light color

Active Publication Date: 2009-12-23
ZHENJIANG UNION CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although benzene-based plasticizers have not been found to be toxic to the human body, due to their symmetrical molecular structure and non-polarity, their miscibility with PVC is poor, and they are easy to precipitate in the case of high additions in PVC emulsified powder systems. , so its application is limited

Method used

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  • Preparation method of cycloalkane anhydride plasticizer

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Embodiment Construction

[0015] Embodiments of the inventive method comprise the following steps:

[0016] Step 1: Add 2.6 parts of isononyl alcohol and 1 part of hexahydrophthalic anhydride into the reaction kettle, heat up to 160-180°C under stirring, and carry out the monoesterification reaction;

[0017] The second step: when the temperature is raised to 160-180°C, add 200ppm tetraisopropyl titanate;

[0018] The third step: continue to heat up to 225°C, hold the temperature for 2 to 5 hours to carry out the double esterification reaction, reduce the acid value to below 0.3mgKOH / g, add alkali to neutralize to less than 0.05mgKOH / g;

[0019] Step 4: Lower the temperature to 210-215°C, and dealcoholize under reduced pressure for 1.5 hours;

[0020] Step 5: Cool down to 95-98°C, add 5% water to kill the catalyst, stir for 30 minutes, then raise the temperature to 110°C for dehydration under reduced pressure, until the water content is less than 0.05% by mass;

[0021] Step 6: add activated carbon a...

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Abstract

The invention relates to the preparation of an additive used for the production of plastics, in particular to a preparation method of a cycloalkane anhydride plasticizer. The method comprises a first step of conducting mono-esterification reaction of 2-4 portions of isononyl alcohol and 1 portion of hexahydrophthalic anhydride; a second step of adding a catalyst when the temperature is increased to 160-180 DEG C; a third step of continuing to increase the temperature to 225 DEG C and then conducting bi-esterification reaction; a fourth step of decreasing the temperature to 210-215 DEG C and then conducting decompression and dealcoholization for 1-2 hours until the alcohol-containing mass percent is less than 0.05 percent; a fifth step of decreasing the temperature to 85-98 DEG C and adding pure water with 2-5 mass percent of reactants in a reactor to kill titanium isopropylate, and then increasing the temperature to 100-110 DEG C for decompression and dehydration after full reaction; and a sixth step of adding activated carbon and diatomaceous earth for bleaching and filtration so as to obtain a finished product. The product obtained does not contain a benzene ring structure, is environment friendly and non-toxic to human body, has high-impedance, and can be added and applied to various PVC plastic products.

Description

technical field [0001] The invention relates to the manufacture of an additive used in plastic production, in particular to a preparation method of a naphthenic acid anhydride plasticizer. Background technique [0002] In the prior art, Chinese patent application CN1824688 discloses a phthalate polyester plasticizer: poly-1,2-propylene glycol phthalate, poly-1,3-butylene phthalate and ortho-phthalate Poly-1,4-butylene phthalate products; this type of product is produced by polymerization of phthalic anhydride and corresponding diols, 2-ethylhexanol with tetra-n-butyl titanate as a catalyst be made of. Chinese patent application CN101157615 discloses a production method of plasticizer diisononyl phthalate. [0003] Chinese patent application CN101245009 discloses a kind of manufacture method of dioctyl terephthalate plasticizer, and it comprises that the polyester waste cloth after cleaning, drying is chopped, puts into reactor; Add octanol and anhydrous ethyl alcohol to re...

Claims

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Application Information

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IPC IPC(8): C07C69/75C07C67/08C08K5/12C08L27/06
Inventor 曹锋
Owner ZHENJIANG UNION CHEM IND
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