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Synthesis method and application of polyhydroxy stearate

A technology of polyhydroxystearate and polyhydroxystearic acid, applied in the direction of carboxylate preparation, carboxylate preparation, chemical instruments and methods, etc., can solve the complex post-treatment of 9,10-dihydroxystearic acid , non-environmental protection, strong corrosion and other problems, to save formula space, increase zinc content, reduce corrosion and toxicity

Active Publication Date: 2015-04-01
ZHEJIANG TRANSFAR WHYYON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above two methods for synthesizing 9,10-dihydroxystearic acid use formic acid as an organic acid, which is highly corrosive and not environmentally friendly; in addition, the second alkaline method for preparing 9,10-dihydroxystearic acid Processing is more complicated

Method used

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  • Synthesis method and application of polyhydroxy stearate
  • Synthesis method and application of polyhydroxy stearate
  • Synthesis method and application of polyhydroxy stearate

Examples

Experimental program
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Embodiment 1

[0030] Embodiment 1: the preparation method of dihydroxystearic acid

[0031] Add 11.3g of oleic acid, 16.0g of industrial acetic acid (50% by mass fraction) and 4.0g of hydrochloric acid with 40% by mass fraction in a three-necked flask with stirring and a thermometer, and slowly dropwise add 30% by mass fraction to the system at room temperature 12.0 g of hydrogen peroxide was heated up to 55° C., and reacted for 6 hours under vigorous stirring. After the reaction was completed, it was suction filtered, washed with hot water for 3 times, and then recrystallized with ethyl acetate to obtain a white powdery solid which was dihydroxystearic acid, with a melting point of 92-96° C. and a yield of 97%. Take the product for infrared spectroscopy detection, such as figure 1 As shown, the result is displayed at 3400cm -1 There is a relatively obvious peak at , which is attributed to the hydroxyl functional group in the molecular structure, so it can be judged that the hydroxyl func...

Embodiment 2

[0032] Embodiment 2: the preparation method of tetrahydroxystearic acid

[0033] Add 11.0g of linoleic acid, 24.0g of industrial acetic acid (50% by mass fraction) and 4.0g of hydrochloric acid with 40% by mass fraction in a three-necked flask with stirring and a thermometer, and slowly add 30% by mass fraction to the system at room temperature. % hydrogen peroxide 24.0g, heated up to 55°C, and reacted for 6 hours under vigorous stirring. After the reaction was completed, it was filtered with suction, washed with hot water for 3 times, and then recrystallized with ethyl acetate to obtain a white powdery solid, namely tetrahydroxystearic acid, with a yield of 79.3%.

Embodiment 3

[0034] Embodiment 3: the preparation method of hexahydroxystearic acid

[0035] Add 10.8g of linolenic acid, 36.0g of industrial acetic acid (50% by mass fraction) and 4.0g of hydrochloric acid with 40% by mass fraction in a three-necked flask with stirring and a thermometer, and slowly dropwise add 30% by mass fraction to the system at room temperature 36.0 g of hydrogen peroxide was heated up to 60° C., and reacted for 6 hours under vigorous stirring. After the reaction was finished, it was suction filtered, washed with hot water for 3 times, and then recrystallized with ethyl acetate to obtain a white powdery solid which was hexahydroxystearic acid with a yield of 61.5%.

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Abstract

The invention discloses a synthesis method of polyhydroxy stearate and application of the polyhydroxy stearate in PVC (polyvinyl chloride) resin heat stabilizers. The existing alkaline process for preparing 9,10-bis-hydroxystearic acid is complex in after-treatment, and no one has applied bis-hydroxystearate to PVC heat stabilizers. The invention is characterized in that in the polyhydroxy stearic acid synthesis, fatty acid, acetic acid and 40 wt% hydrochloric acid are added into the reaction vessel, wherein the fatty acid is one or mixture of more of oleic acid, linoleic acid and linolenic acid; in the system, the mass ratio of fatty acid to anhydrous acetic acid 30% to oxydol is 1:(0.5-2):(1-3.5); and in the reaction system, the mass ratio of anhydrous acetic acid to water is 1:(2.0-3.0). In the synthesis method, the product can be directly precipitated from the system, thereby simplifying the after-treatment.

Description

technical field [0001] The invention relates to the field of heat stabilizers for PVC resins, in particular to a method for synthesizing polyhydroxy stearate and its application in heat stabilizers for PVC resins. Background technique [0002] Among plastics, polyvinyl chloride (PVC) is one of the five general-purpose plastics in the world. Globally, the demand for PVC resin ranks third after polyethylene and polypropylene; while its consumption in China has risen to the third one. In recent years, rising oil prices have created a lot of room for development of China's acetylene-based PVC. [0003] PVC products can be divided into hard, semi-rigid and soft products according to whether plasticizers are added and the amount of additives, so PVC can be widely used in construction, toys, electrical appliances, packaging and other industries. [0004] However, due to its structural defects, PVC will remove HCl when it is heated to about 100°C, and at the usual plastic processi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C59/105C08K5/098C08L27/06
CPCC07C51/367C07C51/412C08K5/098C08L2201/08C07C59/105C08L27/06
Inventor 杨静晏苏学王华周潭莉莉钟健
Owner ZHEJIANG TRANSFAR WHYYON CHEM
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