Extruder isolation of polymers from solution

Details Extruder isolation of polymers from solution Extruder isolation of polymers from solution

1989-08-04

1991-08-27

Anderson, Harold D.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528491, 528493, 528497, 528499, C08G 6440, C08G 6546

Patent

active

050434217

ABSTRACT:
Polymers, such as polyphenylene ethers, are isolated from solution in an extruder by addition of at least one non-solvent. Optional steps include removal of volatiles through vents or ports on the extruder and employment of an auxiliary non-solvent. Additional operations, such as blending with further polymers, fractionation of low molecular weight molecules and functionalization by chemical reaction, may also be performed in the extruder.

REFERENCES:
patent: 3082816 (1963-03-01), Skidmore
patent: 4110843 (1978-08-01), Skidmore
patent: 4668768 (1987-05-01), Mendiratta et al.
patent: 4746482 (1988-05-01), Ribbing et al.
patent: 4789729 (1988-12-01), Nagira et al.
patent: 4845193 (1989-07-01), Umemura et al.

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