| 摘要 |
Multilayer, positive working, thermally imageable elements are disclosed. The elements produce bakeable lithographic printing plates that are resistant to press chemistries. The elements have a substrate, an underlayer, and a top layer. The underlayer comprises a resin or resins having activated methylol and/or activated alkylated methylol groups, such as a resole resin, and a polymeric material that comprises, in polymerized form, (a) methacrylic acid; (b) N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, or a mixture thereof; and (c) one or more monomers of the structure: in which: R1 is H or methyl; X is -(CH2)n-, where n is an integer from 2 to 12; -(CH2-CH2-O)p-CH2-CH2-, where p is an integer from 1 to 3; or -Si(R')(R'')- where R' and R'' are each independently methyl or ethyl; and m is 1, 2, or 3.
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