Process for capping quinone-coupled polyphenylene oxides

Details Process for capping quinone-coupled polyphenylene oxides Process for capping quinone-coupled polyphenylene oxides

1977-05-26

1979-05-29

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528212, 528213, 528215, C08G 6544, C08G 6548

Patent

active

041567730

ABSTRACT:
A process is disclosed which provides for an increase in the oxidative and/or thermal stability of quinone coupled polyphenylene oxides which comprises contacting quinone-coupled polyphenylene oxides with a capping agent in the presence of a water soluble base, and a catalytic phase transfer agent. The resulting new polymers have improved color and in combination with styrene resins provide thermoplastic compositions having improved chemical and physical properties.

REFERENCES:
patent: 3375228 (1978-03-01), Holoch et al.
patent: 3573254 (1971-03-01), Factor
patent: 3736291 (1973-05-01), Vogel
patent: 3784575 (1974-01-01), Rutledge
patent: 3970640 (1976-07-01), Yonemitsu et al.
patent: 3987068 (1976-10-01), Reilly

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