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Isooctanoic acid mercapto alcohol ester based organic tin compound and its preparation method and use

A technology of mercaptoethanol ester and isooctanoic acid, applied in the direction of tin organic compounds, etc., can solve the problems of high investment cost, pollution, complicated process, etc., and achieve the effects of reducing investment, simplifying process and simple synthesis process

Inactive Publication Date: 2006-01-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] In summary, among the organotin PVC heat stabilizers, mercaptans have the best effect, but the mercaptan compounds all use isooctyl thioglycolate as an intermediate, and the production of this intermediate has complex processes and investment. Disadvantages such as high cost and serious pollution

Method used

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  • Isooctanoic acid mercapto alcohol ester based organic tin compound and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Preparation of octyltin bis(mercaptoethanol isooctanoate):

[0057] (1) isooctanoic acid mercaptoethanol ester, dioctyl tin dichloride and xylene are added to the reactor, heated to reflux at 90 DEG C, and 1M NaOH solution is added dropwise simultaneously, and the pH value of the control reaction solution is 6;

[0058] The volume (ml) of each component is as follows (calculated by the total volume of 100ml):

[0059] Isooctanoate mercaptoethanol 15

[0060] Dioctyltin dichloride 15

[0061] 1M NaOH solution 12

[0062] Xylene 58

[0063] (2) the resultant is divided into two layers, and the water layer is discarded through liquid separation, and the organic layer is retained;

[0064] (3) Distillation under reduced pressure, under the condition of -0.07MPa, the organic layer was distilled under reduced pressure. All fractions below 60°C were discarded to remove solvent and some low-boiling impurities in the reaction system. Dioctyltin bis(mercaptoethanol isooctan...

Embodiment 2

[0066] Preparation of (β-ethoxycarbonylethyl)tin bis(mercaptoethanol isooctanoate)

[0067] (1) Add isooctanoic acid mercaptoethanol ester, bis(β-ethoxycarbonylethyl) tin dichloride and xylene into the reactor, heat under reflux at 90°C, and dropwise add 1M NaOH solution to control the pH of the reaction solution value at 6;

[0068] The volume (ml) of each component is as follows (calculated by the total volume of 100ml):

[0069] Isooctanoate mercaptoethanol 15

[0070] Di(β-ethoxycarbonylethyl)tin dichloride 15

[0071] 1M NaOH solution 12

[0072] Xylene 58

[0073] (2) the resultant is divided into two layers, and the water layer is discarded through liquid separation, and the organic layer is retained;

[0074] (3) Distillation under reduced pressure, under the condition of -0.07MPa, the organic layer was distilled under reduced pressure. All fractions below 60°C were discarded to remove solvent and some low-boiling impurities in the reaction system. The PVC heat ...

Embodiment 3

[0076] Preparation of dimethyltin bis(mercaptoethanol isooctanoate):

[0077] (1) Add mercaptoethanol isooctanoate, dimethyl tin dichloride and cyclohexane into the reactor, heat under reflux at 80°C, and dropwise add 1M NaHCO 3 solution, control the pH value of the reaction solution at 7;

[0078] The volume (ml) of each component is as follows (calculated by the total volume of 100ml):

[0079] Isooctanoate mercaptoethanol 10

[0080] Dimethyltin dichloride 8

[0081] 1MNaHCO 3 Solution 10

[0082] Cyclohexane 72

[0083] (2) the resultant is divided into two layers, and the water layer is discarded through liquid separation, and the organic layer is retained;

[0084] (3) Underpressure distillation, under the condition of -0.05MPa, the organic layer was subjected to reduced pressure distillation.

[0085] All fractions below 65°C were discarded to remove solvent and some low-boiling impurities in the reaction system.

[0086] Dimethyltin bis(mercaptoethanol isooctan...

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Abstract

The present invention relates to mercapto ethanol isooctanoate type organic tin compound and its preparation process and application. The compound has the structural expression of RnSnX(4-n), where, R is C1-C30 alkyl group or C1-C10 beta-alkoxyl carbonylalkyl group, X is mercapto ethanol isooctanoate, and n is 1 or 2. During preparation, mercapto ethanol isooctanoate, alkyl or ester tin chloride and organic solvent are first heated and refluxed while adding catalyst; organic layer is then obtained through separating liquid and decompression distilled; and through further steps, the compound is obtained. The synthesis process of the present invention is simple, and has conversion rate higher than 95 %, normal pressure and low reaction temperature, low power consumption and less pollution, and the prepared compound has high reaction activity and low toxicity.

Description

technical field [0001] The invention relates to a polyvinyl chloride industrial auxiliary, an organotin thermal stabilizer, a preparation method and application thereof, in particular to an isooctanoic acid mercaptoethanol ester type organotin compound and its preparation method and application in PVC resin materials. Background technique [0002] As a PVC heat stabilizer, organotin has excellent thermal stability, weather resistance, initial colorability, non-toxicity, transparency and other excellent properties. Therefore, it is currently the most widely used and most effective type of heat stabilizer. The research on organotin thermal stabilizers has a history of nearly 60 years. At present, the consumption of organic tin for PVC heat stabilizer in western countries accounts for about 30-40% of the total consumption of organic tin. According to statistics, the amount of organic tin heat stabilizers in the United States accounts for more than 1 / 4 ...

Claims

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Application Information

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IPC IPC(8): C07F7/22C08K5/58
Inventor 齐明钟理
Owner SOUTH CHINA UNIV OF TECH
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