Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-09-21
1994-05-24
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
528481, 528490, 528499, C08F28300
Patent
active
053149726
ABSTRACT:
In one embodiment, a process is provided for treating virgin arylene sulfide resins, wherein a heated polymer slurry, comprising a virgin arylene sulfide resin and water, is contacted by a buffer solution having a pH less than about 9.35 but greater than that necessary to result in at least a partial curing of the virgin arylene sulfide resin. In a further embodiment, a process is provided for treating a virgin arylene sulfide resin, wherein a virgin arylene sulfide resin is slurried in a buffer solution having a pH less than about 9.35 but greater than that necessary to result in at least a partial curing of the virgin arylene sulfide resin. The treating process of this invention is conducted at an elevated temperature, below the melting point of the virgin arylene sulfide resin, while in the substantial absence of a gaseous oxidizing atmosphere. The treated arylene sulfide resins are recovered from the polymer slurry in a manner which does not result in at least a partial curing of the treated resin.
REFERENCES:
patent: 3616186 (1971-10-01), Blackwell
patent: 4769426 (1988-09-01), Iwasaki et al.
patent: 4801664 (1989-01-01), Nesheiwat et al.
patent: 4814430 (1989-03-01), Iwasaki et al.
Geibel John F.
Nesheiwat Afif M.
Bleutge John C.
Bowman Edward L.
Phillips Petroleum Company
Sweet Mark
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