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.
Claims9
A polymer binder for lithographic printing plate coatings, said polymer binder having attached thereto at least one functional group capable of undergoing radical polymerization, said polymer binder having the following structure:
- wherein
- G1 represents a processing segment providing solubility in organic solvents;
- G2 represents a thermal reactive segment having attached thereto said functional group;
- a, b, d and e are molar ratios and may vary from 0.01 to 0.99;
- and
- may be replaced by
A polymer binder for lithographic printing plate coatings, said polymer binder having attached thereto at least one functional group capable of undergoing radical polymerization, said polymer binder being a copolymer comprising one or more first monomers of formula:
- and one or more second monomers of formula:
- wherein:
- m and w may vary between 0 and 50;
- R is hydrogen or methyl;
- R11 is linear or branched alkyl chain;
- and
- R12 is alkyl, hydroxyl or carboxylic acid.
A polymer binder being:
Dependencies are inferred from the claim text.