Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of methyl tin heat stabilizer

A technology of methyl tin heat and stabilizer, applied in tin organic compounds and other directions, can solve the problems of large dosage and high production cost, and achieve the effects of reducing formula cost, small addition amount and excellent thermal stabilization effect.

Active Publication Date: 2011-06-01
杭州天道实业有限公司
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a kind of preparation method of methyl tin heat stabilizer aiming at the technical defects of heavy metal precipitation, high production cost and large dosage of existing rigid PVC technical products, and the methyl tin heat stabilizer prepared by the method It is a high-efficiency, non-toxic, environmentally friendly heat stabilizer, does not contain harmful heavy metals such as lead, and has good thermal stability

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of methyl tin heat stabilizer
  • Preparation method of methyl tin heat stabilizer
  • Preparation method of methyl tin heat stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of methyl tin chloride intermediate

[0025] Reaction formula:

[0026]3Sn + 6CH3Cl = CH3SnCl3 + (CH3) 2SnCl2 + (CH3) 3SnCl

[0027] (CH3) 3SnCl + SnCl4 = CH3SnCl3 + (CH3) 2SnCl2

[0028] The overall reaction formula:

[0029] Catalyst (CH3)4NCl

[0030] Sn + CH3Cl + SnCl4 → (CH3)xSnCly

[0031] The equipment used in this example: reaction kettle (with stirring system), still (with stirring system), distillation absorption device, metering tank.

[0032] 1. Alkyl halogenation reaction: Check the reaction kettle, transmission device, instrument, pipeline, and absorption device to make them in a normal state. Heat the reaction kettle to raise the temperature of the kettle to 120°C, turn on the vacuum system to make the inside of the kettle in a state of slight negative pressure, open the feeding port of the reaction kettle and add metal tin and tetramethylammonium chloride, close the feeding port, and feed in methyl chloride, Make the pressu...

Embodiment 2

[0035] Example 2: Preparation of methyl tin chloride intermediate

[0036] The specific scheme is the same as that in Example 1, except that the amount of each substance added is: metal tin (Sn) 80 kg, methyl chloride (CH3Cl) 95 kg, tetramethylammonium chloride ((CH3)4NCl) 3.2 kg, tetrachloromethane Tin (SnCl4) 120 kg, water 300 kg. The reaction time was 7 hours. During the distillation process, the kettle temperature was controlled at 150-160° C., and the entire distillation process took 1.5 hours. Measured to obtain 558.8 kg of an intermediate aqueous solution with a mass concentration of 46.31%, with a yield of 96.62%. The aqueous solution is colorless and transparent.

Embodiment 3

[0037] Example 3: Preparation of methyl tin chloride intermediate

[0038] The specific scheme is the same as in Example 1, the difference is that the amount of each substance added is: metal tin (Sn) 95 kg, methyl chloride (CH3Cl) 102 kg, tetramethylammonium chloride ((CH3)4NCl) 3.2 kg, tetramethylammonium chloride ((CH3)4NCl) 3.2 kg, Tin chloride (SnCl4) 128 kg. 300 kg of water. During the distillation process, the kettle temperature was controlled at 170-180° C., and the entire distillation process took 1 hour. Measured to obtain 594.5 kg of an intermediate aqueous solution with a mass concentration of 49.54%, the yield was 97.0%, and the aqueous solution was colorless and transparent.

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of organic chemistry and relates to a preparation method of a methyl tin heat stabilizer. The method comprises the following two steps: a) preparation of a methyl tin chloride intermediate: using tin, chloromethane and stannic chloride to perform alkane halogenation reaction so as to obtain the methyl tin chloride intermediate, and adding water for absorption so as to obtain a methyl tin chloride aqueous solution; and b) esterification-condensation reaction: adding MEO, sodium sulfide and ammonia water in the aqueous solution of methyl tin chloride to perform esterification-condensation reaction, and dewatering after fully reacting to obtain a methyl tin heat stabilizer product. The whole process of the preparation method is easy to control, and the cost is low; the methyl tin heat stabilizer product obtained by the method provided by the invention has an excellent heat stabilizing effect and can completely displace lead salt and cadmium heat stabilizers; and the product has the advantages of linear dosage control performance, low dosage and obviously lowered formula cost, and can be widely used in the manufacturing and processing fields of the PVC (polyvinyl chloride) plastic products.

Description

technical field [0001] The invention belongs to the technical field of organic chemistry and relates to a preparation method of a methyl tin heat stabilizer. Background technique [0002] Methyl tin heat stabilizer is a good heat stabilizer for plastic products, and it is widely used in the calendering, blow molding, extrusion molding and injection molding of polyvinyl chloride (PVC). Compared with heat stabilizers such as lead, cadmium salts and stearates, it has excellent heat stability, excellent transparency, good compatibility, non-toxic, less dosage, fluidity and weather resistance Good sex and other advantages. The product is also widely used in plastic doors and windows, water supply pipes, and decorative materials; and is approved by the German Federal Health Agency (BGA) and the US Food Administration (FDA) for use in PVC products for food and pharmaceutical packaging. The Chinese patent application with the application number 200410060772.0 provides a method for...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C07F7/22C08L27/06C08K5/58
Inventor 宋凤英倪继前朱文彪刘定杰王文英
Owner 杭州天道实业有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com