Patent ID: 7723013
Filing Date: 2010-05-25
Classification: B41C

Abstract:
1. A negative-acting photolithographic printing plate precursor comprising: a substrate having a surface; and a negative-acting photosensitive composition on the surface, wherein the photosensitive composition comprises an acetal polymer, an infrared absorbing dye or pigment, a crosslinking agent comprising amino compounds having at least two functional groups for the acetal resin and a photosensitive chemical acid progenitor, and the acetal polymer has within its backbone a structure comprising a moiety of the formula: wherein: R R wherein R R where R and m=about 5-40 mol %, g=about 10-60 mole %, o=0-20 mole %, p=1-20 mole %, and q=5-50 mole %, preferably 15 to 40 mole %.