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Methyltin maleate and preparation method thereof

A technology of dimethyl tin maleate and methyl tin maleate, which is applied in the direction of tin organic compounds, can solve the problems of expensive raw materials, high production costs, complex production processes, etc., and achieve good product quality and low production costs , producing easily controlled effects

Active Publication Date: 2012-06-20
衢州建华南杭药业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process for preparing butyltin maleate and octyltin maleate is complicated, the price of raw materials is relatively expensive, and the production cost is high

Method used

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  • Methyltin maleate and preparation method thereof
  • Methyltin maleate and preparation method thereof
  • Methyltin maleate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The preparation method of dimethyl tin maleate: add 165 g of dimethyl tin oxide and 300 g of water to a three-necked flask with stirring, stir until there is no lumpy solid suspension, raise the temperature to 30°C, and slowly add maleic anhydride ( Maleic anhydride) 101g, the reaction time is 6 hours, the reaction temperature is controlled at 30°C, the acid value is measured, and the test is performed every one hour. When the acid value is constant, the result is 17.6 mgKOH / g, and the reaction solution is pumped After filtration, the filter cake was dehydrated under a vacuum of 1.0 KPa until the water content was less than 0.3%, and 259.0 g of a white solid product was obtained, the tin content was 44.6%, and the yield was 98.6%.

Embodiment 2

[0026] The preparation method of monomethyltin maleate: Add 158g of monomethyltin oxide and 300g of water into a three-necked flask with stirring, stir until there is no lumpy solid suspension, heat up to 30°C, and slowly add maleic anhydride ( Maleic anhydride) 152g, the reaction time is 6 hours, the reaction temperature is controlled at 30°C, the acid value is measured, and the test is performed every one hour. When the acid value is constant, the result is 27.6 mgKOH / g, and the reaction solution is pumped After filtration, the filter cake was dehydrated under a vacuum of 1.0 KPa until the water content was less than 0.3%, and 299.5 g of a white solid product was obtained, the tin content was 38.6%, and the yield was 98.2%.

Embodiment 3

[0028] The preparation method of monomethyl tin maleate and dimethyl tin maleate mixture: add the mixture 165g of monomethyl tin oxide and dimethyl tin oxide in the there-necked flask with stirring, wherein the monomethyl tin oxide The content is 20%, the content of dimethyl tin oxide is 80%, stir until there is no lumpy solid suspension, heat up to 30°C, slowly add 111g of maleic anhydride, the reaction time is 6 hours, and the reaction temperature is controlled at 30 ℃, start to measure the acid value, test once every hour, wait for the acid value to be constant, the result is 16.8 mgKOH / g, filter the reaction solution with suction, and dehydrate the filter cake at 1.0KPa in a vacuum at 80 ℃ until the water content is less than 0.3% , 266.8 g of white solid product was obtained, the tin content was 39.8%, and the yield was 98.1%.

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Abstract

The invention discloses methyltin maleate and a preparation method thereof, belonging to the technical field of novel halogen-containing polymer thermal stabilizers. The methyltin maleate comprises mono-methyltin maleate and dimethyltin maleate. In the methyltin maleate and the preparation method thereof, the methyltin maleate is a thermal stabilizer used in processing of a halogen-containing polymer, so that yellowing of the halogen-containing polymer is prevented during molding processing; and moreover, production is easy to control, production cost is low, and an obtained product has good and stable quality.

Description

technical field [0001] The invention belongs to the technical field of new halogen-containing polymer heat stabilizers, in particular to methyl tin maleate and a preparation method thereof. Background technique [0002] The methyl tin maleate described in the present invention includes monomethyl tin maleate and dimethyl tin maleate, and its chemical structure and synthesis method have not been found in domestic and foreign journals and patent literature reports. "Acta Polymer Sinica" in 1997, the 2nd issue of literature title is "synthesis and copolymerization of dibutyltin maleate" an article has reported the synthesis of dibutyltin maleate monomer by maleic anhydride and dibutyltin oxide Method, U.S. Patent US005364954A reports the production method of preparing butyltin maleate and octyltin maleate by reacting dibutyltin oxide or octyltin oxide with maleic anhydride, which is used in the field of heat stabilizers for halogen-containing polymers. [0003] The preparation...

Claims

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Application Information

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IPC IPC(8): C07F7/22C08K5/57
Inventor 唐吉元
Owner 衢州建华南杭药业有限公司
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