Patent ID: 8329383

Claim:
A negative-working lithographic printing plate precursor comprising a substrate and having thereon a negative-working imageable layer as the outermost layer, the imageable layer comprising: a) a polymeric binder, b) a free radically polymerizable component, c) an initiator composition that provides free radicals upon exposure to imaging radiation, and d) an oxygen scavenger and shelf-life stabilizer that is represented by either Structure (I) or Structure (II) below: HOOC—Ar—N(R 1 )(R 2 ) (I) HOOC—R 5 —N(R 6 )(R 7 ) (II) wherein Ar is a phenylene or naphthylene group, R 1 and R 2 are independently alkyl, alkenyl, alkynyl, phenyl, phenoxy, —R 5 OH, —CH 2 —C(═O)—R 3 , or —CH 2 —C(═O)O—R 4 groups, R 3 is hydrogen or an alkyl or phenyl group, R 4 is an alkyl or phenyl group, R 5 is an alkylene group, R 6 and R 7 are independently hydrogen or an alkyl, —R 5 OH, —R 5 C(═O)—R 8 , or —R 5 C(═O)OR 9 group, R 8 is hydrogen or an alkyl group, and R 9 is an alkyl group, provided that the oxygen scavenger has no more than one carboxyl group.