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Polyvinyl chloride (PVC) stabilizer diethyl diester tin and preparation method thereof

A technology of diethylene glycol tin and hydroxy ester tin of phenyl dithiodicarboxylate is applied in the field of polyvinyl chloride (PVC) stabilizer diethylene ester tin and its preparation, and can solve the complex process, The product yield is not high enough and the cost is high, and the process is simple, the early colorability is suppressed, and the cost is low.

Inactive Publication Date: 2014-10-29
FOSHAN RISUN HANKE PLASTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its preparation method also has the defects of complicated process, insufficient product yield and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation steps are as follows:

[0045] S1. Synthesis of dichlorodiethylene glycolate based tin

[0046] S11. Prepare raw materials according to the following parts by mass: 360 parts of tin dichloride powder, 200 parts of hydroxyethylene glycol, 600 parts of ethanol, catalyst [PdCl 2 (PPh 3 ) 2 ] 6 parts, 200 parts of hydrogen chloride gas;

[0047] S12. Add tin dichloride powder, hydroxyethylene glycol ester, ethanol and catalyst into a four-necked flask equipped with a reflux condenser, a thermometer, an air guide tube and a stirrer, and adjust the stirring speed in an ice-water bath under constant temperature conditions Suspend the tin dichloride powder;

[0048]S13. Pass dry hydrogen chloride gas into the mixture of S12, react for 6 h, after the color of the reactant becomes lighter, take a sample, filter and concentrate to measure its tin content, judge the end point of the reaction, stop passing hydrogen chloride;

[0049] S14. Heat the product obtain...

Embodiment 2

[0063] The preparation steps are as follows:

[0064] S1. Synthesis of dibromodiethylene glycol ester tin

[0065] S11. Prepare raw materials according to the following parts by mass: 540 parts of tin dichloride powder, 300 parts of hydroxyethylene glycol, 600 parts of ethanol, catalyst [PdCl 2 (PPh 3 ) 2 ] 10 parts, 300 parts of hydrogen bromide gas;

[0066] S12. Add tin dichloride powder, hydroxyethylene glycol ester, ethanol and catalyst into a four-necked flask equipped with a reflux condenser, a thermometer, an air guide tube and a stirrer, and adjust the stirring speed in an ice-water bath under constant temperature conditions Suspend the tin dichloride powder;

[0067] S13. Pass dry hydrogen bromide gas into the mixture of S12, react for 6 h, after the color of the reactant becomes lighter, take a sample, filter and concentrate to measure its tin content, judge the end point of the reaction, stop passing hydrogen bromide;

[0068] S14. Heat the product obtained in...

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PUM

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Abstract

The invention provides a polyvinyl chloride (PVC) stabilizer diethyl diester tin and a preparation method thereof. The scientific name of the stabilizer is bi(2-ethyl hexyl alkoxyl) phenyl dithio dicarboxylic acid ester tin which is a pale yellow or colorless viscous liquid. The tin content is 16-23% and the refractive index is 1.46-1.54. The bi(2-ethyl hexyl alkoxyl) phenyl dithio dicarboxylic acid ester tin synthesized by a three-step reaction method in which bihalo diethyl diester tin and alkyl potassium mercaptanate are synthesized respectively at first and then diethyl diester tin is synthesized has the advantages of low toxicity, efficiency and low cost and the like, is safe, healthy and environment-friendly and can be used for food-level PVC processing. The product can improve the fusing effect of PVC, so that the PVC has good flowability, remarkable early coloring inhibition and ultraviolet-resistant long-term stability when processed. The preparation method provided by the invention has the advantages of simple process, use less equipment, small investment, low cost, good product purity, high yield, no emission of the three wastes and small in toxicity of product, and technical breakthroughs are gained.

Description

technical field [0001] The invention belongs to the technical field of chemical materials. More specifically, it relates to a polyvinyl chloride (PVC) stabilizer diethylene glycol tin and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) stabilizers, as a plastic additive industry, appear in an almost symbiotic relationship with the multi-purpose polymer industry. Many types of stabilizers have been used in the past sixty years, such as: inorganic, lead, organic, barium / calcium, calcium / zinc, organotin and antimony. There are many others that have been thought of but have not been industrialized, such as various organic lead, organic antimony, steroid, indium, and countless organic chemicals. [0003] Dibutyltin laurate is the earliest organotin stabilizer. It has good thermal stability, transparency, lubricity and processing performance, but it has high toxicity and high cost. At the end of the 1950s, the European "Tin Research Instit...

Claims

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Application Information

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IPC IPC(8): C07F7/22C08L27/06C08K5/57
Inventor 陈斌陈坚陈旭东
Owner FOSHAN RISUN HANKE PLASTIC TECH