Method for removing volatile impurities from polyphenylene ether

Details Method for removing volatile impurities from polyphenylene ether Method for removing volatile impurities from polyphenylene ether

1988-02-16

1989-05-16

Anderson, Harold D.

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

Synthetic resins

Treating polymer containing material or treating a solid...

525390, 525397, 528196, 528212, 528499, 528500, 528503, C08G 6546

Patent

active

048311154

ABSTRACT:
Polymer compositions comprising polyphenylene ethers free from polystyrenes are extruded with vacuum venting at 300.degree. C. or above in the presence of water. This extrusion operation reduces the content of volatile impurities, including those with an undesirable odor.

REFERENCES:
patent: 4369278 (1983-01-01), Kasahara et al.

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