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US 4,231,951 AGranted
Complex salt photoinitiator
AssigneeMinnesota Mining and Manufacturing Company
InventorsGeorge H. Smith, Peter M. Olofson
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Abstract
A triarylsulfonium complex salt is described which has particular utility as a photoinitiator for the polymerization of epoxide monomers in thick films or coatings. Photopolymerizable compositions are also described.
Claims4
The process for the preparation of a triarylsulfonium hexafluoroantimonate salt comprising the steps of
- (a) providing an aqueous solution of a watersoluble triarylsulfonium salt;
- (b) adding solid NaSbF.sub.6 or KSbF.sub.6 to said aqueous solution to form a mixture;
- and
- (c) recovering triarylsulfonium hexafluoroantimonate from said mixture.
1 more element
Dependencies are inferred from the claim text.