Multilayer imageable elements

Details Multilayer imageable elements Multilayer imageable elements

2006-05-23

2006-05-23

Gilliam, Barbara L. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

C430S273100, C430S302000, C430S306000, C430S309000, C430S401000, C430S434000, C430S494000, C430S944000, C430S945000

Reexamination Certificate

active

07049045

ABSTRACT:
Multilayer, positive working, thermally imageable, bakeable imageable elements are disclosed. 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 about 5 mol % to about 30 mol % of methacrylic acid; about 20 mol % to about 75 mol % of N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, or a mixture thereof; optionally, about 5 mol % to about 50 mol % of methacrylamide; and about 3 mol % to about 50 mol % of a compound represented by the formula:in-line-formulae description="In-line Formulae" end="lead"?CH2C(R2)C(O)NHCH2OR1,in-line-formulae description="In-line Formulae" end="tail"?in which R1is C1to C12alkyl, phenyl, C1to C12substituted phenyl, C1to C12aralkyl, or Si(CH3)3; and R2is H or methyl. The elements produce bakeable lithographic printing plates that are resistant to press chemistries.

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