Process for preparing styrenic resin

Details Process for preparing styrenic resin Process for preparing styrenic resin

1998-03-03

2000-06-06

Wu, David W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524115, 524323, 524414, 524401, 524 81, 528487, 528495, 528491, 528499, 264211, 26433115, C08J 0702, C08J 0714

Patent

active

060719990

ABSTRACT:
A process for preparing a styrenic resin is herein disclosed which comprises the step of volatilizing extrudinga styrenic polymer (SPS) powder having a syndiotactic configuration in the presence of water, an alcohol or an antioxidant by the use of an extruder to obtain pellets. According to this process, the operation of volatilization extrusion is done in the presence of water, the alcohol or the antioxidant to stably and efficiently prepare the SPS pellets in which yellowing is inhibited, and the operation of the volatilization extrusion is carried out in the presence of water to stably and efficiently prepare the SPS pellets containing a less amount of a remaining volatile component such as an unreacted monomer.

REFERENCES:
patent: 5166238 (1992-11-01), Nakano et al.
patent: 5292587 (1994-03-01), Funaki et al.
patent: 5756658 (1998-05-01), Onodera et al.
patent: 5760172 (1998-06-01), Onodera et al.

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