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Polyphenylene sulfide with low chlorine content, preparation method of polyphenylene sulfide, resin composition and formed body

A technology of polyphenylene sulfide and chlorine content, applied in the field of polyphenylene sulfide with low chlorine content and its preparation, can solve the problems of environmental protection, processing performance and mechanical properties, etc., which is conducive to safe production and simple preparation method , the effect of reducing production costs

Active Publication Date: 2017-05-10
ZHEJIANG NHU SPECIAL MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] Aiming at the problems of environmental protection, processability, and mechanical properties existing in the above prior art, the present invention provides a polyphenylene sulfide with low chlorine content and a preparation method thereof. The chlorine in the polyphenylene sulfide resin The content is less than 800ppm, and the nitrogen content is less than 560ppm, and the polyphenylene sulfide resin has excellent fluidity and thermal stability

Method used

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  • Polyphenylene sulfide with low chlorine content, preparation method of polyphenylene sulfide, resin composition and formed body
  • Polyphenylene sulfide with low chlorine content, preparation method of polyphenylene sulfide, resin composition and formed body
  • Polyphenylene sulfide with low chlorine content, preparation method of polyphenylene sulfide, resin composition and formed body

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no. 1 Embodiment approach

[0064] In the first embodiment, the present invention provides a polyphenylene sulfide resin having a low chlorine content. The polyphenylene sulfide resin of the present invention is obtained through the polycondensation reaction of the sulfur-containing compound and p-dichlorobenzene, and then the end-blocking reaction of the terminal regulator 4-phenylthio-benzenethiol. Preferably, the polycondensation reaction is carried out in the presence of polycondensation assistants.

[0065] sulfur compounds

[0066] The sulfur-containing compound used in this embodiment is not particularly limited in principle, and may be simple sulfur, alkali metal sulfide, alkali metal hydrogensulfide, etc. commonly used in the art. Further, the inventors of the present invention have found that, from the viewpoint of both thermal stability, if the presence of -S-S- in the possible polyphenylene sulfide structure causes a decrease in thermal stability, the sulfide-containing compound in this em...

no. 2 Embodiment approach

[0087] In the second embodiment, the present invention provides a method for preparing polyphenylene sulfide resin with low chlorine content, which includes using sulfur-containing compounds, alkaline substances, and p-dichlorobenzene as raw materials, and using fatty acids as polycondensation aids , 4-phenylthio-benzenethiol (PTT) as the terminal regulator, polycondensation reaction.

[0088] Specifically, the method includes the following steps:

[0089] Step 1: After adding alkaline substances and fatty acids to the solvent, perform dehydration treatment;

[0090] Step 2: adding sulfur-containing compounds to the mixed system of step 1;

[0091] Step 3: Add p-dichlorobenzene to the mixed system of step 2, and carry out polycondensation reaction, add 4-phenylthio-benzenethiol to react in the middle and later stages of polycondensation reaction (such as after the prepolymerization reaction ends), and then Lower the temperature to 155-180°C to obtain a reaction product syste...

no. 3 Embodiment approach

[0115] A third embodiment of the present invention relates to a resin composition and a molded article produced using the resin composition.

[0116] The resin composition of this embodiment contains the polyphenylene sulfide resin obtained in the first embodiment and the second embodiment. In this resin composition, based on different usage purposes, the other resin components are not limited, and may be various engineering plastics and conventional resins having good compatibility with polyphenylene sulfide resin.

[0117] In addition, in the above resin composition, various additives such as flame retardants, weather resistance agents, fillers and other components can also be added as needed to meet the processing and use requirements of the industry, especially the components of the electronic and electrical industry.

[0118] The composite material prepared by using the polyphenylene sulfide resin of the present invention may typically be a fiber-reinforced composite mate...

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Abstract

The invention discloses polyphenylene sulfide with low chlorine content, a preparation method of the polyphenylene sulfide, a resin composition and a formed body. The polyphenylene sulfide with low chlorine content is prepared by performing end-capping 4-thiophenyl-benzenethiol. The method for preparing the polyphenylene sulfide disclosed by the invention comprises the following steps: taking a sulfur-containing compound, an alkaline matter and paradichlorobenzene as raw materials, taking fatty acids as polycondensation additives, taking 4-thiophenyl-benzenethiol (PTT) as an end group regulator, and carrying out a condensation polymerization reaction. The method disclosed by the invention is high in product yield and low in cost, the obtained polyphenylene sulfide product is low in chlorine content and has excellent fluidity and heat resistance. Therefore, the operating requirements of low chlorine and high fluidity in electronic enterprises can be met.

Description

technical field [0001] The present invention relates to a polyphenylene sulfide with low chlorine content and its preparation method, resin composition and molded body, in particular to polyphenylene sulfide with low chlorine content prepared by using a mercapto-containing aromatic compound as a terminal regulator. The preparation method belongs to the field of preparation and processing of engineering plastics. Background technique [0002] Polyphenylene Sulfide (PPS) is an engineering plastic with excellent heat resistance, chemical resistance, flame retardancy, mechanical strength, electrical properties, and dimensional stability. Since PPS can be formed into various molded products, films, sheets, fibers, etc. by general melt processing methods such as extrusion molding, injection molding, and compression molding, it is widely used in the fields of electronic and electrical equipment, automotive equipment, etc. [0003] If polymer products such as plastics contain halog...

Claims

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Application Information

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IPC IPC(8): C08G75/0259C08G75/0209C08L81/02
CPCC08G75/0209C08G75/0259C08L81/02C08G75/0263C08G75/0281
Inventor 陈志荣李沃源周贵阳尹红连明潘帅锋邓杭军
Owner ZHEJIANG NHU SPECIAL MATERIALS
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