Thianthrenium salt cationic photoinitiators
AssigneeRensselaer Polytechnic Institue
InventorJames V. Crivello
Life of this patent
Estimating the term…
Abstract
Triarylsulfonium salts of formula I or II are useful as initiators for cationic photopolymerizations: wherein Ar1 and Ar2 are independently polycyclic aryl, substituted aryl, heteroaryl, substituted heteroaryl, or aryl or heteroaryl, pendant from a polymer chain; and MtXn− is a complex anion selected from PF6−, SbF6−, AsF6−, GaF6−, BF4−, (C6F5)4B− and CF3SO2)3C−.
Claims4
A process for preparing a 5-aryl thianthrenium salt, said process comprising, in the presence of Eaton's reagent, combining thianthrene-5-oxide with an aromatic compound of formula Ar1AH to form a methanesulfonate salt of a 5-aryl-thianthrenium ion of formula IA
- wherein Ar1A is aryl, substituted aryl, heteroaryl, substituted heteroaryl, polycyclic aryl, aryl pendant from a polymer chain or heteroaryl pendant from a polymer chain.
Dependencies are inferred from the claim text.