Unlock instant, AI-driven research and patent intelligence for your innovation.

Production method of decatalyzed polyphenylene sulfide resin

A technology of polyphenylene sulfide resin and production method, which is applied in the field of polymer material resin synthesis, can solve the problems of high recovery cost, complicated production process, long reaction time, etc., and achieves low cost, short polymerization time and simple operation. Effect

Active Publication Date: 2022-05-06
四川明道和化学新材料有限公司
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In summary, in order to realize the synthesis of polyphenylene sulfide and obtain high molecular weight polyphenylene sulfide in the above patents, sodium sulfide needs to be dehydrated, a large amount of NMP and water are removed, and then fresh deionized water is added again, which makes the production process complicated. Long reaction time, a large amount of fresh water and the use of NMP bring higher recycling costs to production recycling

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
  • Production method of decatalyzed polyphenylene sulfide resin
  • Production method of decatalyzed polyphenylene sulfide resin
  • Production method of decatalyzed polyphenylene sulfide resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Add 40kg of solvent NMP and 11kg of sodium sulfide trihydrate (sodium sulfide content 60%) into a 60L pure titanium polymerization reactor A, and heat up to 205°C for azeotropic dehydration under the protection of nitrogen. A total of 7.5kg of liquid is extracted, and the liquid enters a 10L In the pure titanium reactor B, add 12.4kg of p-dichlorobenzene to the 60L polymerization reactor A and raise the temperature from 220°C to 265°C at a heating rate of 10°C / h. It takes about 4.5 hours. Add 250g and 600g of NaOH and 600g of p-dichlorobenzene to the 10L reactor B, raise the temperature to 270°C, wait for the 60L polymerization reactor A to heat up to 265°C at a constant temperature, and the actual waiting time is 2.2 hours. After the 60L polymerization reactor A was heated to 265°C, the material in the 10L reactor B was added, and then the 60L polymerization reactor A was kept at a constant temperature of 265°C for 4 hours. Filter, wash and dry the filter cake. 8.2 kg...

Embodiment 2

[0057] In a 60L pure titanium polymerization reactor A, add solvent NMP 40kg, sodium sulfide trihydrate 11kg (sodium sulfide content 60%) and raise the temperature to 202°C for azeotropic dehydration under the protection of nitrogen. In the pure titanium reactor B, add 12.4kg of p-dichlorobenzene to the 60L polymerization reactor A and raise the temperature from 220°C to 256°C at a heating rate of 8°C / h. It takes about 4.5 hours. Add 200g and 580g of NaOH and p-dichlorobenzene to the 10L reactor B, raise the temperature to 265°C, wait for the 60L polymerization reactor A to heat up to 256°C at constant temperature, and the actual waiting time is 2 hours. After the 60L polymerization reactor A was heated to 256°C, the material in the 10L reactor B was added, and then the 60L polymerization reactor A was kept at a constant temperature of 255°C for 4 hours. Filter, wash and dry the filter cake. 8.0 kg of resin were obtained.

Embodiment 3

[0059] Add 40kg of solvent NMP and 11kg of sodium sulfide trihydrate (sodium sulfide content 60%) into a 60L pure titanium polymerization reactor A, and heat up to 200°C for azeotropic dehydration under the protection of nitrogen. A total of 6.0kg of liquid is extracted, and the liquid enters a 10L In the pure titanium reactor B, add 12.4kg of p-dichlorobenzene to the 60L polymerization reactor A and raise the temperature from 220°C to 268°C at a heating rate of 10°C / h. It takes about 4.8 hours. Add 200g and 580g of NaOH and p-dichlorobenzene to the 10L reactor B, raise the temperature to 265°C, wait for the 60L polymerization reactor A to heat up to 268°C at a constant temperature, and the actual waiting time is 2.8 hours. After the 60L polymerization reactor A was heated to 268°C, the material in the 10L reactor B was added, and then the 60L polymerization reactor A was kept at a constant temperature of 268°C for 4 hours. Filter, wash and dry the filter cake. 8.4 kg of resi...

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 relates to a production method of catalyst-removed polyphenylene sulfide resin, and belongs to the technical field of polymer material resin synthesis. The technical problem solved by the present invention is to provide a production method of polyphenylene sulfide which is simple to operate without using auxiliary agents and catalysts. This method uses Na 2 S·3H 2 O is dehydrated first, and then reacts with p-dichlorobenzene to produce relatively high molecular weight polyphenylene sulfide; then add the liquid azeotropically evaporated from alkali and sodium sulfide and p-dichlorobenzene to generate active monomers at high temperature, and then Further promote the secondary reaction of polyphenylene sulfide to obtain high molecular weight polyphenylene sulfide. The method has simple steps, does not use catalysts and external auxiliary agents such as phase separation agents, and the source of raw materials is easy to obtain, does not need to go through complex treatment processes, does not need to deliberately require dehydration, and only needs to azeotrope to a certain temperature. Yes; the liquid evaporated by sodium sulfide is directly used as the raw material for the reaction. The whole production has the advantages of low cost, simple operation and short polymerization time.

Description

technical field [0001] The invention relates to a production method of decatalyzed polyphenylene sulfide resin, which belongs to the technical field of polymer material resin synthesis. Background technique [0002] Polyphenylene sulfide resin (PPS) has excellent chemical resistance and high temperature thermal stability, and has properties such as flame retardancy, insulation, and radiation resistance. As an engineering plastic, it is suitable to produce various electronic devices and automobile parts by injection molding, extrusion molding, etc. [0003] There are many ways to polymerize polyphenylene sulfide resin. Some use aromatic compounds and sulfur monochloride to prepare disulfide compounds, such as diphenyl disulfide, and then thermal oxygen polymerization to generate polyphenylene sulfide; there are also sulfur and para The method of preparing polyphenylene sulfide containing divalent sulfur by reacting diiodobenzene; there is also a method of using alkali metal ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/0254C08G75/0209
CPCC08G75/0254C08G75/0209
Inventor 李勇梁平
Owner 四川明道和化学新材料有限公司