Quinoxaline-containing hyperbranched aromatic...

Details Quinoxaline-containing hyperbranched aromatic... Quinoxaline-containing hyperbranched aromatic...

2005-02-01

2005-02-01

Seidleck, James J. (Department: 1711)

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

Synthetic resins

Nitrogen-containing reactant

C528S220000, C528S192000, C528S193000, C528S224000

Reexamination Certificate

active

06849707

ABSTRACT:
A quinoxaline-containing hyperbranched ether-ketone polymer having repeating units of the formula:and a method for preparing the polymer are provided.

REFERENCES:
patent: 6608171 (2003-08-01), Tan et al.
patent: 6639042 (2003-10-01), Baek et al.
patent: 6642347 (2003-11-01), Baek et al.
patent: 6743889 (2004-06-01), Tan et al.
Jong-Beom Baek, Loon-Seng Tan ,Improved syntheses of poly(oxy-1,3-phenylenecarbonyl-1,4-phenylene) and related poly(ether-ketones) using polyphosphoric acid/P2O5 as polymerization medium, Polymer, 44 (2003) 4135-4147, published Jul. 2003.
Jong-Beom Baek, Loon-Seng Tan ,Synthesis of Hyperbranched Poly(ether-ketone) Containing Quinoxaline Moiety from an AB2Monomer in Polyphosphoric Acid/P2O5,Polymer Preprints, 2002, 43(1), 4-515, published in Mar. 2002.

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