Preparation of methyltin stabiliser

A technology of methyl tin stabilizer and dimethyl tin dichloride, which is applied in the direction of tin organic compounds, can solve the problems of continuous processing and production of unfavorable products, poor mold release, poor lubricity, and easy sticking of batch materials to rolls, etc., to achieve The effect of good product stability, high transparency, and easy production control
CN101475584BActive Publication Date: 2011-09-14YANGZHOU HATAIKE TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANGZHOU HATAIKE TECH
Publication Date
2011-09-14

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Abstract

The invention provides a methyl tin stabilizer and a method for preparing the same and relates to the technical field of organic chemistry. The method comprises: in the presence of a catalyst, mixing and refluxing an alkyl diacid, mercaptoethanol and a solvent; after the reaction finishes, washing the solution with water and obtaining a dimercaptoester; and adding the obtained dimercaptoester into an aqueous solution of methyltin trichloride or / and dimethyltin dichloride, adjusting the pH value of the system by using an alkaline solution, carrying out an pre-esterification reaction before heat preservation, heating for carrying out a post-esterification reaction, washing an organic phrase after the reaction finishes, separating the organic phrase from a water phrase, carrying out vacuum water removal and obtaining the methyl tin stabilizer. The methyl tin stabilizer has high transparency, weather resistance, compatibility, pressure analysis, non-toxicity, excellent high-temperature stability and low tin content. The low tin-content methyl tin has higher thermal stability than the prior methyl tin, so final PVC products can achieve the same stability with even smaller amount of added methyl tin stabilizer, the use of tin is reduced and the production costs of terminal clients are reduced at last.
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Description

technical field

[0001] The invention relates to the technical field of organic chemical industry, in particular to the technical field of organotin heat stabilizer used for preparing polyvinyl chloride. Background technique

[0002] Polyvinyl chloride (PVC) has excellent corrosion resistance, flame retardancy and high mechanical properties, and because of its low price, rich sources of raw materials, and mature manufacturing technology, its products are widely used in light industry, machinery, electronics, construction, textiles, It is an ideal substitute for steel and wood in industries such as aviation, medicine and food packaging.

[0003] Since the polyvinyl chloride structure contains double bonds, branch points, and initiator residues, it will be degraded with the dehydrochlorination reaction when heated to 100°C. molecular crosslinking. In order to minimize the loss of chemical and physical properties of PVC during processing, it is necessary to add some chemical s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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