Method for making diarylhalonium salts

Details Method for making diarylhalonium salts Method for making diarylhalonium salts

1976-12-09

1979-04-24

Daus, Donald G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260299, 260300, 260440, 260446, 260646, 260649DP, C07D40302

Patent

active

041511751

ABSTRACT:
A method is provided for making certain diaryliodonium salt photoinitiators, based on the initial formation of a diaryliodonium bisulfate. Methylene chloride is substituted for acetic acid during the reaction between potassium iodate and benzene in the presence of acetic anhydride and sulfuric acid. The diaryliodonium bisulfate is then reacted with a counterion source, such as a metal salt, to produce the desired diaryliodonium salt which can be used as a photoinitiator. The iodonium salt photoinitiators made by the method of the present invention can be used to make UV curable compositions.

REFERENCES:
patent: 3729313 (1973-04-01), Smith
patent: 3808006 (1974-04-01), Smith
patent: 3981897 (1976-09-01), Crivello
Berry et al., Twelfth Intl. Congr. Pure and App. Chem., N.Y., N.Y., Sep. 1951, p. 465.
Masson et al., J. Chem. Soc., (London), (1937), pp. 1718-1723.
Mason, Nature, vol. 139, p. 150-151 (1937).
Caserio et al., J.A.C.S., vol. 81 (1959), pp. 336-342.
Masson et al., J. Chem. Soc. pp. 1699-1701 (1938).
Beringer et al., J.A.C.S. vol. 81, pp. 342-351 (1959).

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