High molecular weight polyphenylene sulfide resin and its preparation method and use

A polyphenylene sulfide resin, high molecular weight technology, applied in the preparation of polyphenylene sulfide resin, linear high molecular weight polyphenylene sulfide resin field, can solve the problems of uncontrollable sulfur source purity, complicated process, high energy consumption, etc. Achieve excellent thermal stability, simple preparation method, widen the effect of application range

Active Publication Date: 2020-08-25
ZHEJIANG NHU SPECIAL MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyphenylene sulfide resin obtained by the thermal cross-linking method has a deep color and cannot be used for applications requiring natural color, and the high molecular weight polyphenylene sulfide obtained by the above two methods has branched chains of different degrees, resulting in polyphenylene sulfide Changes in performance thus limiting its usefulness
High-molecular-weight polyphenylene sulfide can also be synthesized by using different sulfur sources, but the equipment is more complicated, the purity of the sulfur source is uncontrollable, and the process repeatability and safety cannot meet the production requirements.
However, increasing the water content of the polymerization system or adding reactive monomers during the polymerization process to increase the molecular weight of polyphenylene sulfide will greatly increase the reaction pressure, thereby putting forward higher requirements for the reaction device, or the loss of polyphenylene sulfide during the process is relatively large. Many, high energy consumption, complex and uncontrollable process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0095] In the first embodiment of the present invention, the present invention provides a high molecular weight polyphenylene sulfide resin, especially a linear high molecular weight polyphenylene sulfide resin. In some preferred embodiments of the present invention, the high-molecular-weight polyphenylene sulfide is obtained through a viscosity-increasing reaction between primary polyphenylene sulfide and a chain extender. The polyphenylene sulfide primary product is a polycondensation product of sulfur-containing compounds and halogenated aromatic compounds.

[0096] chain extender

[0097] In the present invention, the mercapto-containing metal aromatic compound represented by the following formula (1) is used as a chain extender:

[0098] MS-L-SM...(1)

[0099] Wherein, M represents a metal ion, preferably an alkali metal ion, typically, a sodium ion and / or a potassium ion.

[0100] L represents a divalent linking group containing an aromatic group, and the aromatic g...

no. 2 approach

[0120] In the second embodiment of the present invention, a method for preparing a high molecular weight polyphenylene sulfide resin is disclosed, the method includes the following steps:

[0121] Polycondensation reaction to obtain polyphenylene sulfide primary product;

[0122] Tackification reaction to obtain high molecular weight polyphenylene sulfide resin.

[0123] polycondensation reaction

[0124] In the present invention, the polyphenylene sulfide primary product is obtained through polycondensation reaction, which is the same as the above , and the polycondensation reaction uses sulfur-containing compounds and halogenated aromatic compounds as reactants. The sulfur-containing compound is selected from hydrogen sulfide, preferably sodium hydrogen sulfide or potassium hydrogen sulfide, more preferably sodium hydrogen sulfide; the halogenated aromatic compound can be combined with the halogenated aromatic compound used in the above synthetic chain extender same or d...

no. 3 approach

[0150] In the third embodiment of the present invention, a composition is provided, which includes the high molecular weight polyphenylene sulfide resin in and the high molecular weight polyphenylene sulfide resin obtained by the preparation method in polyphenylene sulfide resin.

[0151] 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.

[0152] 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 various industrial needs.

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Abstract

The present invention relates to high molecular weight polyphenylene sulfide resin and its preparation method and application. The present invention uses sulfur-containing compounds and halogenated aromatic compounds as raw materials, basic compounds and fatty acids as polycondensation assistants, carries out polycondensation reaction, and obtains primary polyphenylene sulfide after purification treatment. It reacts with chain extender at high temperature to form high molecular weight polyphenylene sulfide resin. The preparation method of the invention has the advantages of high yield and low cost, and has the characteristics of selectively and controllably preparing polyphenylene sulfide resins with different melt viscosities and molecular weights, and the obtained polyphenylene sulfide resins have excellent heat resistance. The linear high-molecular-weight polyphenylene sulfide resin with high thermal stability obtained by the present invention can be used for producing plates, pipes and rods, and can be processed like metal for machining such as cutting, grinding, polishing, drilling, etc., and can also be used for making fibers, Diaphragms and films are especially suitable for automotive parts, electronic / electrical equipment, chemical and mechanical industries and other fields.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a high-molecular-weight polyphenylene sulfide resin, in particular to a linear high-molecular-weight polyphenylene sulfide resin with high thermal stability, and to a preparation method of the polyphenylene sulfide resin and uses. 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. High-molecular-weight polyphenylene sulfide, due to the increase in molecular weight, has more excellent performance, is more widely used, and is mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/0209C08G75/0227C08G75/0259
CPCC08G75/0209C08G75/0227C08G75/0259C08G75/0204C08L81/02C08G75/029C08J5/18C08J2381/02
Inventor 陈志荣李沃源尹红胡柏剡周贵阳连明覃广德邓杭军张雄伟邱贵生吴可军
Owner ZHEJIANG NHU SPECIAL MATERIALS
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