Radiation-sensitive compositions and printing plates

A printing plate comprising an aluminum substrate having a layer of a radiation-sensitive composition comprising:

• (a) a thermal-activated acid generator;
• (b) a crosslinking resin;
• (c) a binder resin comprising a polymer containing first reactive pendant groups capable of undergoing acid-catalyzed condensation with the crosslinking resin at a temperature in the range of about 60-200.degree. C. to form a crosslinked polymer, said first reactive pendant groups selected from the group consisting of carboxylic acid, sulfonamide, and alkoxymethyl amide;
• and
• (d) an infrared absorber.

A radiation-sensitive composition comprising:

• (a) a thermal-activated acid generator;
• (b) a crosslinking resin;
• (c) a binder resin comprising a polymer containing reactive pendant groups capable of undergoing acid-catalyzed condensation with the crosslinking resin at a temperature in the range of about 60-200.degree. C. to form a crosslinked polymer;
• and
• (d) an infrared absorber;
• wherein said polymer is selected from the group consisting of poly(4-hydroxystyrene/methyl methacrylate), poly(2-hydroxyethyl methacrylate/cyclohexyl methacrylate), poly(2-hydroxyethyl methacrylate/methyl methacrylate), poly(styrene/butyl methacrylate/methyl methacrylate/methacrylic acid), poly(butyl methacrylate/methacrylic acid), poly(vinylphenol/2-hydroxyethyl methacrylate), poly(styrene/n-butyl methacrylate/2-hydroxyethyl methacrylate/methacrylic acid), poly(styrene/ethyl methacrylate/2-hydroxyethyl methacrylate/methacrylic acid, poly(N-methoxymethyl methacrylamide/2-phenylethyl methacrylate/methacrylic acid), poly(2-hydroxyethyl methacrylate/cyclohexyl methacrylate/methacrylic acid), poly(N-methoxymethyl methacrylamide/2-phenylethyl methacrylate/methacrylamide/methacrylic acid), poly(N-methoxymethyl methacrylamide/styrene/butyl methacrylate/methacrylic acid), poly(N-iso-butoxymethyl acrylamide/2-hydroxyethyl methacrylate/methyl methacrylate), and poly(styrene/n-butyl methacrylate/methacrylic acid/N-iso-butoxymethyl methacrylamide).