Reclamation of polymers, that contain styrene in the polymeric b

Details Reclamation of polymers, that contain styrene in the polymeric b Reclamation of polymers, that contain styrene in the polymeric b

1995-11-13

1997-01-14

Michl, Paul R.

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

Synthetic resins

Process of treating scrap or waste product containing solid...

521 42, 521 425, 521147, 528422, 528492, C08J 1104

Patent

active

055940358

ABSTRACT:
A process for the reclamation of polystyrene and other styrene containing polymers, by dissolving said polystyrene polymer into a water soluble solvent, such as NMP, and then precipitating said polymer away from the water soluble solvent through the addition of the water soluble solvent/styrene polymer solution into water. The particles of the polymer that precipitate out and float to the surface of the water can be collected and dried at temperatures that do not give added heat history to the polymer.

REFERENCES:
patent: 3736271 (1973-05-01), Schutze
patent: 4031039 (1977-06-01), Mizumoto
patent: 4196105 (1980-04-01), Kubiat
patent: 4517312 (1985-05-01), Kumanska
patent: 5232954 (1993-08-01), Peters
patent: 5269948 (1993-12-01), Krutchen

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