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US 7,910,768 B2Granted
Materials for lithographic plates coatings, lithographic plates and coatings containing same, methods of preparation and use
AssigneeAmerican Dye Source, Inc.
InventorsMy T. Nguyen, Marc-Andre Locas
Life of this patent
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Abstract
This invention relates to iodonium salts, acetal copolymers and polymer binders comprising functional groups capable of undergoing cationic or radical polymerization, their method of preparation and their use in the preparation of coating solutions and coatings. This invention also relates to coatings containing the iodonium salts, acetal copolymers and/or polymer binders and to negative working lithographic printing plates comprising these coatings.
Claims30
An iodonium salt comprising a positively charged iodine atom to which two aryl rings are attached and a negatively charged counter ion,
- the iodonium salt having attached to at least one of said aryl rings at least one urethane- and/or urea-containing substituent, said substituent having attached thereto at least one functional group capable of undergoing cationic or radical polymerization
- the iodonium salt being of general formula:
- wherein A1− is said negatively charged counter ion, Y is said substituent, and each of the aryl rings is optionally substituted.
Dependencies are inferred from the claim text.