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US 3,981,897 AGranted
Method for making certain halonium salt photoinitiators
AssigneeGeneral Electric Company
InventorJames V. Crivello
Life of this patent
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Abstract
A method is provided for making certain diarylhalonium salts containing Group Va metal hexafluorides useful as photoinitiators, such as diphenyliodonium hexafluoroarsonate. An intermediate diarylhalonium bisulfate is prepared. Reaction is thereafter effected between the diarylhalonium bisulfate and the source of a counterion, such as AsF.sub.6 .sup.- , in the form of the corresponding acid or salt. The halonium salt photoinitiators can be used to make UV curable compositions.
Claims7
A method for making diarylhalonium salts of the formula,
- [(R).sub.a (R.sup.1).sub.b X ].sup.+ [YF.sub.6 ].sup.- ,
- which comprises effecting contact under aqueous conditions between a diarylhalonium bisulfate salt of the formula,
- [(R).sub.a (R.sup.1).sub.b X].sup.+ [HSO.sub.4 ].sup.- ,
- and a Group VA alkali hexafluoro salt of the formula,
- MYF.sub.6
- and thereafter recovering the diarylhalonium Group VA hexafluoride compound from the resulting mixture, where R is a monovalent aromatic group, R.sup.1 is a divalent aromatic group, X is a halogen radical, M is an element selected from the class of hydrogen, alkali metal and alkaline earth metal, Y is selected from P, As and Sb, is a whole number equal to 0 or 2, b is a whole number equal to 0 or 1, and the sum of a+b is equal to 2, or the valence of X.
3 more elements
Dependencies are inferred from the claim text.