System and method for reducing off-gassing of polyphenylene sulfide
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08G-075/14
출원번호
US-0371275
(2009-02-13)
등록번호
US-8263734
(2012-09-11)
발명자
/ 주소
Fodor, Jeffrey S.
South, Jr., Aubrey
출원인 / 주소
Chevron Phillips Chemical Company LP
대리인 / 주소
Fletcher Yoder P.C.
인용정보
피인용 횟수 :
12인용 특허 :
17
초록▼
The techniques provide a system and a method of producing polyphenylene sulfide (PPS) polymer. The PPS polymer is produced by reacting a sulfur source and a dihaloaromatic compound in the presence of a polar organic compound in a polymerization mixture in a polymerization vessel. The PPS polymer is
The techniques provide a system and a method of producing polyphenylene sulfide (PPS) polymer. The PPS polymer is produced by reacting a sulfur source and a dihaloaromatic compound in the presence of a polar organic compound in a polymerization mixture in a polymerization vessel. The PPS polymer is washed with a base to lower the oligomer content of the PPS polymer and thus the off-gassing during processing.
대표청구항▼
1. A method of producing polyphenylene sulfide (PPS) polymer, comprising: reacting a sulfur source and a dihaloaromatic compound in the presence of a polar organic compound in a polymerization mixture in a polymerization vessel to form a PPS polymer;flash evaporating at least a portion of the polar
1. A method of producing polyphenylene sulfide (PPS) polymer, comprising: reacting a sulfur source and a dihaloaromatic compound in the presence of a polar organic compound in a polymerization mixture in a polymerization vessel to form a PPS polymer;flash evaporating at least a portion of the polar organic compound from the polymerization mixture to terminate the reaction of the sulfur source and the dihaloaromatic compound; andwashing the PPS polymer with a base or a solvent comprising n-methyl pyrrolidone (NMP), wherein washing lowers off-gassing of the PPS polymer. 2. The method as recited in claim 1, wherein the base is added to the flash evaporated polymerization mixture and raises the pH of the flash evaporated polymerization mixture to at least 10. 3. The method as recited in claim 1, wherein washing the PPS polymer comprises adding the base to a water wash of the PPS polymer to increase a pH of the water wash to at least about 10. 4. The method as recited in claim 1, wherein the base comprises sodium hydroxide. 5. The method as recited in claim 1, wherein washing comprises washing the PPS polymer with the base or the solvent after discharging the PPS polymer from the polymerization vessel. 6. The method as recited in claim 5, wherein an oligomer content of the PPS is reduced by about 33%. 7. The method as recited in claim 1, wherein washing the PPS polymer comprises adding the base to a water wash of the PPS polymer, then washing the PPS polymer with the water wash. 8. The method as recited in claim 1, wherein the sulfur compound comprises sodium sulfide (Na2S), the dihaloaromatic compound comprises p-dichlorobenzene (DCB), and the polar organic compound comprises N-methyl-2-pyrrolidone (NMP). 9. The method as recited in claim 1, wherein the sulfur compound comprises sodium N-methyl-4-aminobutanoate (SMAB) and sodium hydrosulfide (NaSH), the dihaloaromatic compound comprises p-dichlorobenzene (DCB), and the polar organic compound comprises N-methyl-2-pyrrolidone (NMP). 10. The method as recited in claim 1, wherein washing comprises adding the base to the polymerization mixture prior to termination of the reaction of the sulfur source and the dihaloaromatic compound. 11. The method as recited in claim 1, wherein washing comprises adding the base to raise the pH of the polymerization mixture to at least 10. 12. The method as recited in claim 1, wherein washing comprises adding the base to the polymerization vessel after termination of the reaction of the sulfur source and the dihaloaromatic compound. 13. The method as recited in claim 12, wherein flash evaporating comprises lowering a pressure in the polymerization vessel to flash evaporate the polar organic compound from the polymerization mixture. 14. The method as recited in claim 1, wherein washing the PPS polymer comprises washing the PPS polymer with the base after discharging the PPS polymer from the polymerization vessel. 15. The method as recited in claim 1, wherein washing the PPS polymer comprises adding the base to a water wash of the PPS polymer to increase a pH of the water wash to at least about 10. 16. A process for manufacturing a product comprising PPS polymer, the process comprising: forming a PPS polymer into a product, the PPS polymer being produced by a method comprising: reacting a sulfur source and a dihaloaromatic compound in a presence of a polar organic compound in a polymerization mixture in a polymerization vessel to form the PPS polymer;flash evaporating at least a portion of the polar organic compound from the polymerization mixture to terminate the reaction of the sulfur source and the dihaloaromatic compound; andwashing the PPS polymer with a base or a solvent comprising n-methyl pyrrolidone (NMP) to lower an oligomer content of the PPS polymer. 17. The process as recited in claim 16, wherein the act of forming a PPS polymer into a product comprises subjecting the PPS polymer to at least one of heating, melting, blending, compounding, injection molding, blow molding, precision molding, film-blowing, or extrusion.
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이 특허에 인용된 특허 (17)
Sutherlin Dirk M. (Bartlesville OK), Derivatization of arylene sulfide polymers.
Hoover Kenneth C. (Tulsa OK) Clark ; Jr. Earl (Bartlesville OK) Reger Roy E. (Bartlesville OK) Scoggins Lacey E. (Bartlesville OK) Nesheiwat Afif M. (Madison NJ), Higher molecular weight arylene sulfide resin and process for its preparation.
Geibel Jon F. (Bartlesville OK) Ash Carlton E. (Sugarland TX), Process for preparing poly(arylene sulfide) polymers using cyclic arylene sulfide oligomers.
Vidaurri Fernando C. ; Geibel Jon F. ; Waterman James W. ; Chaffin Jay M. ; South ; Jr. Aubrey ; Fodor Jeffrey S. ; Kile Glenn F., Process for producing poly(arylene sulfide).
Clark ; Jr. Earl (Bartlesville OK) Scoggins Lacey E. (Bartlesville OK) Kile Glenn F. (Borger TX), Production of granular poly(arylene sulfide) polymers containing reduced amounts of oligomers.
Fodor Jeffrey S. ; Geibel Jon F. ; Vidaurri Fernando C., Recovery of modifier compounds and polar organic compounds from a poly(arylene sulfide) recycle mixture.
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