Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1996-10-30
1998-05-12
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
528298, 528492, 528503, C08F 600, C08J 300
Patent
active
057506442
ABSTRACT:
A process is disclosed for the crystallization of a PEN prepolymer containing volatile components. The temperature is maintained at a temperature in the range of about 20.degree. C. above the Tg and about 10.degree. C. below the Tm while the PEN prepolymer is agitated. The PEN prepolymer is present as chips or pellets. The pressure during crystallization is maintained at a level higher than the vapor pressure of the volatile components in the PEN prepolymer chips or pellets.
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Acquah Samuel A.
Muller Kim
Shell Oil Company
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