Radiation imagery chemistry: process – composition – or product th – Imaged product – Including resin or synthetic polymer
Reexamination Certificate
2005-11-11
2009-11-10
Hamilton, Cynthia (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Imaged product
Including resin or synthetic polymer
C430S278100, C430S302000, C430S286100, C430S281100, C430S926000, C430S920000, C430S915000, C430S922000, C430S916000, C522S904000, C522S913000, C522S009000, C522S016000, C522S026000, C522S023000, C522S018000, C101S456000, C101S463100
Reexamination Certificate
active
07615323
ABSTRACT:
Lithographic printing plate precursor comprising (a) a lithographic substrate with a hydrophilic surface and (b) a radiation-sensitive coating on the hydrophilic surface comprising (i) one or more types of monomers and/or oligomers and/or polymers, each comprising at least one ethylenically unsaturated group accessible to a free radical polymerization, (ii) at least one sensitizer, and at least one coinitiator capable of forming free radicals together with the sensitizer (ii); characterized in that the at least one sensitizer is an oligomeric or polymeric compound comprising the following structural unit (Formula (I)), wherein π1is an aromatic or heteroaromatic unit or a combination of the two so that a conjugated n-system is present between the two groups Z in structure (I), each Z independently represents a heteroatom, each R1and R2is independently selected from a halogen atom, an alkyl, aryl, alkylaryl or aralkyl group, a group —NR3R4and a group —OR5, each R3, R4and R5is independently selected from an alkyl, aryl, alkylaryl and aralkyl group, a and b independently represent 0 or an integer from 1 to 4, n has a value of >1 and AS is an aliphatic spacer.
REFERENCES:
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Z. Yang et al. “A soluble blue-light-emitting polymer”, Macromolecules, vol. 26, 1993, pp. 1188-1190.
A.M. Sarker et al. “Synthesis, characterization, and optical properties of copolymer containing fluorine-substituted distyrylbenzene and non-conjugated spacers” Macromolecules, vol. 32, 1999, pp. 7409-7413.
M. Zheng et al, “Oxadiazole containing conjugated-nonconjugated blue and blue-green light emitting copolymers” Macromolecules, vol. 34, 2001, pp. 4124-4129.
Baumann Harald
Draber Axel
Dwars Udo
Mursal Michael
Pietsch Detlef
Hamilton Cynthia
Kodak Graphic Communications GmbH
Tucker J. Lanny
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