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Preparation process of low-odor methyl tin mercaptide stabilizer

A tin methyl mercaptide, preparation technology, applied in the direction of tin organic compounds, compounds of group 4/14 elements of the periodic table, organic chemistry, etc., can solve problems such as unacceptable odor and vomiting, and achieve improvement of odor Taste, thermal stability retention effect

Pending Publication Date: 2020-11-03
上海鱼童实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the traditional methyltin mercaptide, the production personnel of various factories and the users of the final products are difficult to accept the smell of the traditional methyltin mercaptide, and some of them may also produce a sense of vomiting

Method used

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Embodiment Construction

[0010] Below in conjunction with embodiment the present invention is further described in detail.

[0011] The preparation technology of a kind of low odor tin mercaptide stabilizer of the present invention comprises the following steps:

[0012] (1) Preparation of catalyst ammonium salt: add absolute ethanol to a stainless steel reactor, pass trimethylamine into it, dissolve and absorb it, raise the temperature to 80°C, stir and feed in methyl chloride gas, control the temperature at 115°C, and control the pressure at 0.8-1.0 MPa, the reaction time is 20 hours, after cooling and centrifugal filtration, a light yellow or white crystalline compound can be obtained, and the catalyst ammonium salt can be obtained, which is taken out and put into a bottle for later use;

[0013] (2) Prepare a mixture of dimethyl tin dichloride and monomethyl tin trichloride: add 3.5 kg of tin flakes and 0.1 kg of catalyst ammonium salt into a stainless steel reactor, raise the temperature to 150°C...

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Abstract

The invention discloses a preparation process of a low-odor methyl tin mercaptide stabilizer. The preparation process comprises the following steps: (1) preparing a catalyst ammonium salt; (2) preparing a mixture of dimethyl tin dichloride and methyl tin trichloride; and (3) preparing the low-odor methyl tin mercaptide stabilizer. Compared with the prior art, the method has the advantages that silicon bonds are implanted between the sites of a COO- bond and a polyol bond by using the chromium oxide catalyst in the reaction process, and the number of carbon bonds in ester is reduced; therefore,the original thermal stability, transparency, compatibility and environmental protection performance are retained in performance, the original odor is greatly improved in odor, and the method is suitable for industrial production, and the final product is acceptable among users.

Description

technical field [0001] The invention relates to a stabilizer, in particular to a preparation process of a low-odor methyl tin mercaptide stabilizer. Background technique [0002] The traditional methyltin mercaptide is mainly a mixture of dimethyltin mercaptide and monomethyltin mercaptide. It has excellent heat stabilizer properties, and there is no other type of PVC stabilizer that can surpass it in terms of heat stability. Excellent transparency: using the formula of mercaptan methyl tin heat stabilizer, you can get crystal-like products without whitening. The product is non-toxic: methyl tin mercaptide is a non-toxic, green and environmentally friendly stabilizer. Good compatibility: methyl tin mercaptide stabilizer has good compatibility with resin and is easy to disperse. In the transparent PVC products industry, it has been widely used. However, with the traditional methyltin mercaptide, the production personnel of various factories and the users of the final prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/22C08K5/58C08L27/06
CPCC07F7/226C08K5/58C08K2201/014C08L2201/08C08L27/06
Inventor 祁磊磊
Owner 上海鱼童实业有限公司
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