Title:
METHOD FOR MANUFACTURING HIGH-REACTIVITY POLYPHENYLENE SULFIDE RESIN AND PRODUCT MANUFACTURED THEREBY
Document Type and Number:
WIPO Patent Application WO/2024/078508
Kind Code:
A1
Abstract:
Disclosed in the present invention are a method for manufacturing high-activity polyphenylene sulfide (PPS) by regulating and controlling the water content in the polymerization process and a high-efficiency PPS resin manufactured thereby. The manufacturing method comprises: taking sodium hydrosulfide and p-dichlorobenzene as raw materials, taking N-methyl-2-pyrrolidone as a solvent, carrying out a polycondensation reaction until the conversion rate of p-dichlorobenzene reaches 97% or more, adding deionized water, reducing the temperature in a reaction kettle to 250-260°C, keeping the temperature for 1-3 h, and cooling for post-processing. The molar weight of the added deionized water is 1.0-2.5 mol based on 1.0 mol of sodium hydrosulfide. The method for manufacturing high-activity PPS disclosed in the present invention can be realized in the PPS polymerization process, that is, an end-capping reagent does not need to be additionally added, without affecting the molecular weight and thermal stability of the finally manufactured PPS; chain extension treatment does not need to be carried out after the PPS resin is manufactured, without additionally increasing the technological process and the production cost.
Inventors:
YANG ZHENG (CN)
GUI HUIQIANG (CN)
DENG HANGJUN (CN)
ZHOU GUIYANG (CN)
HU JUN (CN)
GUI HUIQIANG (CN)
DENG HANGJUN (CN)
ZHOU GUIYANG (CN)
HU JUN (CN)
Application Number:
PCT/CN2023/123839
Publication Date:
April 18, 2024
Filing Date:
October 10, 2023
Export Citation:
Assignee:
ZHEJIANG NHU SPECIAL MAT CO LTD (CN)
ZHEJIANG NHU CO LTD (CN)
ZHEJIANG NHU CO LTD (CN)
International Classes:
C08G75/0259; C08G75/029
Foreign References:
| CN115572389A | 2023-01-06 | |||
| JP2008260858A | 2008-10-30 | |||
| CN110294844A | 2019-10-01 | |||
| CN108164702A | 2018-06-15 | |||
| CN111171320A | 2020-05-19 | |||
| CN113004520A | 2021-06-22 |
Attorney, Agent or Firm:
HANGZHOU ZHIXIAN PATENT AGENCY et al. (CN)
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