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US 4,994,217 AGranted
Low odor polyphenylene ether/polystyrene process
AssigneeGeneral Electric Company
InventorsJohn P. Banevicius, William M. Bunting, Alexandros Hasson, Susan J. Hathaway, William E. Pecak, John P. Skilbeck
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Abstract
Low odor polyphenylene ether/polystyrene resins are produced in a process by solution blending low odor polyphenylene ether and polystyrene resins and passing the solution through devolatilizers prior to recovery.
Claims22
A process for the production of a polyphenylene ether/polystyrene resin composition of low odor, the process comprising
- (i) blending
- (a) a solution comprising polyphenylene ether resin and a normally liquid aromatic hydrocarbon solvent, said solution having a by-product 2,4,6-trimethylanisole content of less than 1000 parts per million by weight based on said resin and sources of odoriferous amine content and
- (b) a solution comprising a polystyrene resin or a rubber modified polystyrene resin and a normally liquid aromatic hydrocarbon solvent;
- (ii) partially devolatilizing said blended solutions (a) and (b) by passing them through at least one zone of heat exchange whereby at least 25 percent of volatiles are evaporated and separated;
- and
- (iii) feeding the partially devolatilized blended resin composition to at least one stripping zone to complete the devolatilization thereof and to reduce the odoriferous amine content.
3 more elements
Dependencies are inferred from the claim text.