Patent ID: 11866560
Assignee: UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 6:
7. The process according to claim 1, wherein:
a) said multifunctional phenol is selected from the group consisting a 1,4-benzenediol, 1,3-benzenediol, 1,2-benzenediol, 2,2-Bis(4-hydroxyphenyl)propane, 1,1-Bis(4-hydroxyphenyl)ethane, 2,2-Bis(4-hydroxy-3-methylphenyl)propane, 2,2-Bis(4-hydroxyphenyl)hexafluoropropane, 3,4′,5-Trihydroxy-trans-stilbene 3,4′,5-Trihydroxy-cis-stilbene, 1,1-Bis(4-hydroxyphenyl)sulfone, phenylbis(4-hydroxyphenyl)phosphine oxide, phenylbis(3-hydroxyphenyl)phosphine oxide, tris(3-hydroxyphenyl)phosphine oxide, and mixtures thereof;
b) said cyanogen halide is selected from the group consisting of cyanogen chloride, cyanogen bromide and mixtures thereof;
c) said inorganic base is selected from the group consisting sodium hydroxide, lithium hydroxide, and mixtures thereof;
d) said organic base is a tetraalkyl ammonium hydroxides.